90-96 Q45 Exhaust?
-
QuickSilver
- Posts: 144
- Joined: Tue Feb 11, 2003 10:25 am
Yuup, all original. the 91 Ts didnt come with the T emblem, that still bothers me after almost 2 years of ownership, Ill tell you guys what I was think about doing, now dont laugh at me, well ok seeing how we are all family you can laugh, I spotted this on one of the Camaro forums. http://www.ststurbo.com/____why_remote_mounting
We figured a T3 and to keep up exhaust velocity do a single 2.5 into the turbo, this is a good idea for a low boost ala 5lbs for the Q, the car would pick up a good 50 hp, only reall mod would be to move the MAF to the rear of the vehicle, now at this point im just thinkn about tryin it, but who knows, with some formulations worked out this could be golden. HeavyDuty with the fleet of horsepower you have listed this would be right up your alley. Me and Qship have a guy in our area with a 91 T that has the exhaust exiting on both sides, looks kinda wiered because he didnt modify the bumper cover, however its nothin like what appears to be shotgun barrels lookn you dead in the face
We figured a T3 and to keep up exhaust velocity do a single 2.5 into the turbo, this is a good idea for a low boost ala 5lbs for the Q, the car would pick up a good 50 hp, only reall mod would be to move the MAF to the rear of the vehicle, now at this point im just thinkn about tryin it, but who knows, with some formulations worked out this could be golden. HeavyDuty with the fleet of horsepower you have listed this would be right up your alley. Me and Qship have a guy in our area with a 91 T that has the exhaust exiting on both sides, looks kinda wiered because he didnt modify the bumper cover, however its nothin like what appears to be shotgun barrels lookn you dead in the face
Brings back memories of the nice throaty sound my dads 68 Eldorado made when there was a small leak somewhere in the exhaust system. Then Midas had to silence it. Damn them!!!HeavyDuty wrote:My stock system has a leak or two & it's starting to annoy me (although I'll miss the nice buzz I get while cruising). :bonghit
-
boomstriker
- Posts: 64
- Joined: Thu Dec 04, 2003 9:30 am
Ya heavy duty,
The stock system looks more like 2 than 2.25.There's lot's of theory on H pipes vs. X pipes out there as well as a how to tune a system to a particular set of engine parameters.
There's plenty of room to do about anything you want under there, but the two or three inches that you can move the X pipe back and forth, whether you use mandrel bends or not, or using 2.25 or 2.5 is not going to be heard, felt or measured without a dyno. There's already enough restriction up to that point anyway.
I went pretty extreme as far as dia and volume and I couln't tell any torque loss, just gain at the top.
If you don't want it louder, you don't want to go bigger, and you worried about gaining or losing 1 or 2 HP or ft/lbs. then just leave it stock.
Kirk
The stock system looks more like 2 than 2.25.There's lot's of theory on H pipes vs. X pipes out there as well as a how to tune a system to a particular set of engine parameters.
There's plenty of room to do about anything you want under there, but the two or three inches that you can move the X pipe back and forth, whether you use mandrel bends or not, or using 2.25 or 2.5 is not going to be heard, felt or measured without a dyno. There's already enough restriction up to that point anyway.
I went pretty extreme as far as dia and volume and I couln't tell any torque loss, just gain at the top.
If you don't want it louder, you don't want to go bigger, and you worried about gaining or losing 1 or 2 HP or ft/lbs. then just leave it stock.
Kirk
Quote »How would you move the MAF to the rear???[/quote] The MAF wires would just need to be lengthend so it could be mounted in the rear, you need to do this because of the recirculated bloww off valve that would be used, the air has to be out back into the system so the MAF will see the correct readings.Quote »There's lot's of theory on H pipes vs. X pipes out there as well as a how to tune a system to a particular set of engine parameters. [/quote] The last car I had that needed an X-pipe we just simply sprayed the exhaust with white paint before the cats to find the hotest point ( paint will be more burnt than anyother area sprayed) this is where we then put the X-pipe, the guy had more theory to it but I cant remember 
Here is a intereresting article http://www.vetteweb.com/tech/0307vet_xpipe/
Here is a intereresting article http://www.vetteweb.com/tech/0307vet_xpipe/-
HeavyDuty
- Posts: 1281
- Joined: Tue Sep 23, 2003 4:51 pm
- Car: 1995 Infiniti Q45
95 Nissan 240SX S14
96 Nissan D21
06 Nissan 350Z Z33
On the turbo question, 1Qckser, do you or anyone else know if JWT has ever done a program for a boosted Q? Hell, we already have 370inj & ample fuel delivery for 5 psi. If 5psi is all we're theoretically after, why not use a little 2nd gen Eclipse take-off T25? They're cheap as dirt & would keep the price of a DIY "kit" real cheap. If someone wanted more flow with less heat, one could machine the compressor housing to accept a Thunderbird Turbo coupe or RX-7 compressor wheel, add a perfect circle thrust bearing, machine the turbine housing & do a slight clip on the turbine wheel & outflow a 16G.....but I digress.
LOL, this started out as an inquiry about exhausts, now we're talkin mounting a turbo.
This stuff is truly a disease.
Kirk, I hope I didn't come across the wrong way with my follow up post to yours. I am a little anal when it comes to certain things & I don't want to turn my driver into every other car I've owned where I modify it to where I don't like it anymore, get bored, then buy something else & SWEAR I'm going to leave THIS one alone. But since I'm paying the price to drive a 4 valve VVL Japanese V8, I want to hear it, dammit. :pface
But, it has to be just the right tone, like the Jag XJR, or Cayenne S, Marauder, '04 Audi S4 (the 4.2 V8), it's not easy to do, for me, at least.
I had no less than 6 completely different systems on a 98 Mark VIII trying to make it sound like a Fox4 with flowmasters. Never happened.
I had a complete Bassani equal length shorty, twin 385 cfm cat X, cat back on my 93 Lightning in 93 and have been one of their most outspoken proponents since. Beautiful, functional, perfect tone, etc, & picked up an honest 2 mpg. When you're only getting 14, that's big news. It is a tuned "system" & probably only works as well as it does because it was applied as such, instead of a cafeteria approach with different manufacturers, piping diameters, etc.
I also recently installed a 1 5/8-1 3/4 stepped long tubes, 2.5" off road X & 2.5" cat back on my 88 5.0 LX trunk. Top end torque was monstrous, (5500-6250 yawn) hp gains good as well, but my butt dyno knew I lost power down low. That car is about to get a 600hp air/water Vortech T-Trim 383 dropped in and that combo will be perfect then, but now....ehhhh, 2.5" duals on an otherwise stock 6k rpm 5.0 is an overkill IMHO.
I also had a 99 Civic Si, completely stock motor except for an 8 psi aftercooled Vortech V5 G Trim, JDM CTR intake cam, Comptech header, stock cat, Comptech *50mm* exhaust. It put down 246/169 where similar combos with big headers, no cats & 60 or 70mm exhausts were only netting an average of 225whp.
Point is/was, IMHO, and as we all know, bigger is not necessarily better. I personally just don't want to jump in with both feet without doing some serious calculations on what combo will work best for *me* meaning a good balance of tone, volume, velocity & the broadest power gain possible.
Flow means nothing when velocity drops.
SWAG at this moment has me thinking a mandrel bent 50mm or 2.25" *at most* with a pair of Random Tech metal core high flows, & Bassani mufflers would suit me perfect. Right now I'm stuck on how to terminate the system from the axle back.
A business associate's DynoJet 248 can handle the duties of settling any "what works best" questions if I decide to fab up two or more systems of varying diameters.
I need to follow up with a member here with respect to a set of headers he has available from his RHD Q, of course that would throw all of this out the window with respect to what would be ideal on a car with stock manifolds.
Sorry this was so long, I guess I'm a little bored not being able to do much off-the-shelf stuff with this car, although the maintenance to date has and will continue to keep me occupied well enough. :rolleyes
This was just *me* asking for *me*, I certainly don't want to derail or cast any aspersions with respect AZ & BRM's upcoming system design or manufacturing, as well as what works for you. I'm just typing out loud & trying to apply what I've learned about other applications to this car that is new to me.
LOL, I just thought about how Q45Tech is sitting back thinking to himself (if he even read this) "I already told you dumbasses you can't get any gains from changing the exhaust, but go ahead & blow your money & time."
LOL, this started out as an inquiry about exhausts, now we're talkin mounting a turbo.
This stuff is truly a disease.
Kirk, I hope I didn't come across the wrong way with my follow up post to yours. I am a little anal when it comes to certain things & I don't want to turn my driver into every other car I've owned where I modify it to where I don't like it anymore, get bored, then buy something else & SWEAR I'm going to leave THIS one alone.
But since I'm paying the price to drive a 4 valve VVL Japanese V8, I want to hear it, dammit. :pface But, it has to be just the right tone, like the Jag XJR, or Cayenne S, Marauder, '04 Audi S4 (the 4.2 V8), it's not easy to do, for me, at least.
I had no less than 6 completely different systems on a 98 Mark VIII trying to make it sound like a Fox4 with flowmasters. Never happened.
I had a complete Bassani equal length shorty, twin 385 cfm cat X, cat back on my 93 Lightning in 93 and have been one of their most outspoken proponents since. Beautiful, functional, perfect tone, etc, & picked up an honest 2 mpg. When you're only getting 14, that's big news. It is a tuned "system" & probably only works as well as it does because it was applied as such, instead of a cafeteria approach with different manufacturers, piping diameters, etc.
I also recently installed a 1 5/8-1 3/4 stepped long tubes, 2.5" off road X & 2.5" cat back on my 88 5.0 LX trunk. Top end torque was monstrous, (5500-6250 yawn) hp gains good as well, but my butt dyno knew I lost power down low. That car is about to get a 600hp air/water Vortech T-Trim 383 dropped in and that combo will be perfect then, but now....ehhhh, 2.5" duals on an otherwise stock 6k rpm 5.0 is an overkill IMHO.
I also had a 99 Civic Si, completely stock motor except for an 8 psi aftercooled Vortech V5 G Trim, JDM CTR intake cam, Comptech header, stock cat, Comptech *50mm* exhaust. It put down 246/169 where similar combos with big headers, no cats & 60 or 70mm exhausts were only netting an average of 225whp.
Point is/was, IMHO, and as we all know, bigger is not necessarily better. I personally just don't want to jump in with both feet without doing some serious calculations on what combo will work best for *me* meaning a good balance of tone, volume, velocity & the broadest power gain possible.
Flow means nothing when velocity drops.
SWAG at this moment has me thinking a mandrel bent 50mm or 2.25" *at most* with a pair of Random Tech metal core high flows, & Bassani mufflers would suit me perfect. Right now I'm stuck on how to terminate the system from the axle back.
A business associate's DynoJet 248 can handle the duties of settling any "what works best" questions if I decide to fab up two or more systems of varying diameters.
I need to follow up with a member here with respect to a set of headers he has available from his RHD Q, of course that would throw all of this out the window with respect to what would be ideal on a car with stock manifolds.
Sorry this was so long, I guess I'm a little bored not being able to do much off-the-shelf stuff with this car, although the maintenance to date has and will continue to keep me occupied well enough. :rolleyes
This was just *me* asking for *me*, I certainly don't want to derail or cast any aspersions with respect AZ & BRM's upcoming system design or manufacturing, as well as what works for you. I'm just typing out loud & trying to apply what I've learned about other applications to this car that is new to me.
LOL, I just thought about how Q45Tech is sitting back thinking to himself (if he even read this) "I already told you dumbasses you can't get any gains from changing the exhaust, but go ahead & blow your money & time."
-
QuickSilver
- Posts: 144
- Joined: Tue Feb 11, 2003 10:25 am
[QUOTE]Originally posted by HeavyDuty [B But since I'm paying the price to drive a 4 valve VVL Japanese V8, I want to hear it, dammit. :pface
But, it has to be just the right tone, like the Jag XJR, or Cayenne S, Marauder, '04 Audi S4 (the 4.2 V8), it's not easy to do, for me, at least.
Amen, HeavyD!:ylsuper
But, it has to be just the right tone, like the Jag XJR, or Cayenne S, Marauder, '04 Audi S4 (the 4.2 V8), it's not easy to do, for me, at least.
Amen, HeavyD!:ylsuper
-
elwesso
- Posts: 30810
- Joined: Sun Feb 23, 2003 4:52 pm
- Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT - Location: Indiana
- Contact:
Havent we already proven that the NICO stickers are worth at least 30hp, and the big ones (like what hitman has on his Q) are at least 50hp.....
Whoever made those movies a while back ago (i think it was 1qckster) I liked that setup whatever it was...... I still have them on my computer and view them from time to time......
Whoever made those movies a while back ago (i think it was 1qckster) I liked that setup whatever it was...... I still have them on my computer and view them from time to time......
HeavyD because of mounting the turbo in the rear the af ratio has to be very low as to make up for the loss of velocity and exhaust temp, after my friend who ownes a local shop looked at some of the specs on the Qs engine figured that a T3 would work great, I think a T25 on the Qs engine size with a lil AR ratio would be boosted and done by 3000 rpms, I still think this will work, after all like you said 370 cc injectors allreadt in place, maybe all we would need is a Greedy E-manage, WES you still have that video of my car? can you post it so heavy can see it? the link doesnt work anymore, Thanks.
hosted by me: (the second one is also yours, right?)http://home.comcast.net/~mbruni13/exhaust.WMV
http://home.comcast.net/~mbruni13/q45.WMV
http://home.comcast.net/~mbruni13/q45.WMV
I removed the stock pipes rear of the resonators, put on 2.25 pipe into 2 bullet style resonators then into 3.5 resonated tips, I have another clip of the car at idle then with me revving it up, sultan if you want I can send you that one to, thanks you guys are awesome. Wes my best friend has a Q thats a twin to yours with some nice 18s on it, that color looks reall nice with the sun beating down on it. Sultan your the best, I didnt realize I sent you both clips, however I still have one more.
-
HeavyDuty
- Posts: 1281
- Joined: Tue Sep 23, 2003 4:51 pm
- Car: 1995 Infiniti Q45
95 Nissan 240SX S14
96 Nissan D21
06 Nissan 350Z Z33
Sounds good, 1qckser, please tell me you weren't smoking a Marlboro & swilling a Mountain Dew while videotaping that yourself? :pface Oh, you were on a dyno doing that.....right? j/k
The only reason I was thinking (Super 60 upgraded) t25 was the targeted 5psi. I got 487whp with a turbotechnologyinc.com kit on a 98 LS1 with a lil' ole 60-1 & that was at 12psi, IIRC. The 60-1 is really small too & that was a 6,500 rpm 5.7. But I also understand what you're saying with the turbo being rear mounted...somewhere...& the resulting loss of flow to the turbine.
I need to look at one of these rear mounted turbo setups, I saw the link previously listed but would like to see one firsthand.
Oh...to hell with it, let's just use this kit & change the piping as necessary; :freak
The only reason I was thinking (Super 60 upgraded) t25 was the targeted 5psi. I got 487whp with a turbotechnologyinc.com kit on a 98 LS1 with a lil' ole 60-1 & that was at 12psi, IIRC. The 60-1 is really small too & that was a 6,500 rpm 5.7. But I also understand what you're saying with the turbo being rear mounted...somewhere...& the resulting loss of flow to the turbine.
I need to look at one of these rear mounted turbo setups, I saw the link previously listed but would like to see one firsthand.
Oh...to hell with it, let's just use this kit & change the piping as necessary; :freak
Actually I was puffing a COHIBA while sitting on the dyno with my Brandy on the dash board testing vibration levels @ 140 mph:D is that one of your motors? look reall nasty.Here is a vid of the kit on a camaro http://www.discountchips.net/2...l.mpg
-
elwesso
- Posts: 30810
- Joined: Sun Feb 23, 2003 4:52 pm
- Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT - Location: Indiana
- Contact:
1qckster- The color does look really nice when the sun shines on it.... In the dark it looks more "marooney" and in the sun it looks "redder"..... Man I use some excellent terms!
Ive always wondered.... i realize how turbo setups are done, but how do you actually hook them up..... Do you hook it up right before the TB or something?
Ive always wondered.... i realize how turbo setups are done, but how do you actually hook them up..... Do you hook it up right before the TB or something?
-
HeavyDuty
- Posts: 1281
- Joined: Tue Sep 23, 2003 4:51 pm
- Car: 1995 Infiniti Q45
95 Nissan 240SX S14
96 Nissan D21
06 Nissan 350Z Z33
No, that's a turbotechnologyinc.com kit for a Moosetang Windsor. I laugh like hell when I see it though, it's like a T100 or something.
Not trying to arbitrarily knock it, but, a couple of thoughts on the LT1 rear turbo kit;1) made a whole bunch of noise, sounded like it turned on kinda late2) Geezus! the air filter's just inboard of the rear tires? SLURP!3) Draw through AND blow through MAF??? uhhh...draw through & LT1edit for me, thank you. Unless the upper one was left in as a spacer?4) yeah, the dump-tube-less wastegate makes for a nice fuel tank warmer.
f*** it, after all this bench racing, I'm just going to throw in a pair of side/side stainless flowmasters & see how it sounds...............just..........kidding......
Not trying to arbitrarily knock it, but, a couple of thoughts on the LT1 rear turbo kit;1) made a whole bunch of noise, sounded like it turned on kinda late2) Geezus! the air filter's just inboard of the rear tires? SLURP!3) Draw through AND blow through MAF??? uhhh...draw through & LT1edit for me, thank you. Unless the upper one was left in as a spacer?4) yeah, the dump-tube-less wastegate makes for a nice fuel tank warmer.
f*** it, after all this bench racing, I'm just going to throw in a pair of side/side stainless flowmasters & see how it sounds...............just..........kidding......
Ok Heavy, between that Camaro set up and this link that someone else posted on this site we should be able to Turbo charge the Q, check this setup out on this LS400, the filters are in a worse spot than on the Camaro, and holly smokes look at how low the turbos are, but cant say anything about it because he did it and I didnt. I need more speed dammit, im going nuts, I think im just gonna buy another bike, a Hyabusa with a lil juice would be good.http://www.clublexus.com/forum...ber=1
-
HeavyDuty
- Posts: 1281
- Joined: Tue Sep 23, 2003 4:51 pm
- Car: 1995 Infiniti Q45
95 Nissan 240SX S14
96 Nissan D21
06 Nissan 350Z Z33
(index fingers firmly planted in my ears)
lalalalalalalalalalalalala :pface
Sorry, can't hear you....you want to turbo *your* Q? Cool! Have fun, you can do it, or I can do it on your car, but I'm not doing it to mine, particularly some turbo-on-a-tailpipe thing.
nope, nope, nope, nope, nope.
shh! you're a bad influence. :rolleyes
Now go to bed, reflect on the subject line of this thread, & think pleasant thoughts like a GTi-R DET for your Classic or your G20, not G*50*.
lalalalalalalalalalalalala :pface
Sorry, can't hear you....you want to turbo *your* Q? Cool! Have fun, you can do it, or I can do it on your car, but I'm not doing it to mine, particularly some turbo-on-a-tailpipe thing.
nope, nope, nope, nope, nope.
shh! you're a bad influence. :rolleyes
Now go to bed, reflect on the subject line of this thread, & think pleasant thoughts like a GTi-R DET for your Classic or your G20, not G*50*.
Heavy your an awesome guy, any man that drives a SE-R is allright by me, I still know you have the resources to turbo the Q, just steal some parts from one of those boosted Fords and we will be in buisness, that tailpipe line was funny as hell, reminds me of when Eddy Murphy played Beverly Hills Cop ( Im not gonna fall for the bannana in the tailpipe trick) that was a classic, anyway im rambling, I think we have hit a peak as far as Q performance goes, so we gotta do somethin to get over that hump, I thought about juice but nitrous does not like platinum plugs. Any way thats my second SE-R, its a new project waiting to be completed with a VE swap, paint and suspension, just did the NX2000 brake upgrade with EBC greens all the way around, and 2 1/4 exhaust with a Acura RSX type S muffler, and CAI. car runs great although not as fast as my first one, the 91 went 14.2 @96.8 mph, it had 260,000 on it when all of the rockers suddenly broke, actually I think the Jun cams had a lot to do with it.