Dyno Results johnwhitmire64 1995 Q45t RMT

[Q-ZILLA]

Aside from getting this car custom tuned, I'm pretty happy with these results so far. No knocking, pinging or anything else... Boost set @ 14psi. While on dyno, boost peak 13.5psi.

The guy took a long time running the motor up, stopped at 6k rpm. 1st run: Stage 2; 470 @5000 /504 @4800 Second run: Stage 1; 450 @4900 /520 @4100

[maxnix]

I doubt it will live long at 12 PSI.

[Q-ZILLA]

Maxnix; take your negative a-hole attitude somewhere else. Don't post your lame a**, un-knowledgable BS on my posts! Should've known you'd be the first to chime in, negatively. FYI a-hole, I've been running 10+psi for months, you were the first to poo poo any of us doing the RMT on OUR cars, so kiss my a** you dumbass, no talent loser!

[maxnix]

Maxnix; take your negative a-hole attitude somewhere else. Don't post your lame a**, un-knowledgable BS on my posts! Should've known you'd be the first to chime in, negatively. FYI a-hole, I've been running 10+psi for months, you were the first to poo poo any of us doing the RMT on OUR cars, so kiss my a** you dumbass, no talent loser!

Well, with such an intelligent statement, it is easy to see why you have your difficulties. Better post quickly or I doubt you will reach 200 before it all goes boom.

I will defer to Sijoko as he has been running a turbo for far longer than you.

BYW, how's the lag?

[Q-ZILLA]

Your such an arrogant douchebag. I was putting my turbo together while Shane, QSIGUY, was putting his together. He beat me getting done, but I made changes that are even different than his... Sijoko didn't have his together till after Shane's and mine were done you Cliff Claven pillow-biter. Your a I KNOW EVERYTHING type and no matter what, you think your right. I've been successfully street racing my RMT for over 2.5 years, so why don't you go bother someone else, you grumpy f***! You must not have much of a life, your the most negative guy on this site that I've seen. What the f*** do you care if we trick out our Q's? You should be giving encouragement and CONSTRUCTIVE CRITICISM if you were a half decent type of guy. PLEASE STAY OFF MY POSTS IN THE FUTURE AND KEEP YOUR NEGATIVITY TO YOURSELF.

[AZhitman]

I doubt it will live long at 12 PSI.

Why?

What exactly about the engineering of the VH would make any mechanically-inclined individual think it wouldn't handle boost very well?

Please be detailed.

The supercharged Q ran 8psi WITHOUT A TUNE back in 2001-03. Just tanked up with Avgas, cranked up the FPR and prayed for awesomeness.

it is easy to see why you have your difficulties.

Difficulties? At 470hp, the only difficulty I can imagine is getting her to stay in a straight line.

Better post quickly or I doubt you will reach 200 before it all goes boom.

Reach 200 what?

I will defer to Sijoko as he has been running a turbo for far longer than you.

Why? That's like a weakling picking a fight and then saying, "I'll let my friend Mongo here stomp you, he's bigger and stronger."

BYW, how's the lag?

Lag? As opposed to the neck-snapping acceleration of a stock Q? "Lag" is a word people who don't drive turbocharged cars use with people who do drive turbocharged cars to make themselves feel superior.

Knock it off, Brian. Dennis isn't here to bail you out anymore.

John, when are we getting a feature article?

[Q-ZILLA]

THANK YOU, AZ! I still have to get her tuned and would like to get paint done, but maybe I can put something together. I need to get pics of the new interior up for someone else as well. I have been working very hard to do something different, I don't want to blow her up, but I think these motors are grossly underestimated. Guys in Australia are doing crazy things with them. There was a guy with a VH in a 240 and was putting out more than 800... I'm not going anywhere near that. After tuning, this is it, no more boosting. It is a BLAST, especially with the 4.11's in the rear. One of my goals was to be able to hear a chirp between second and third gear... No problem there. First to second can be very interesting, but it really just squats and goes… The GM of Harbor Nissan was told about some crazy turbo'd Q and came down to see the Q on the dyno and was s*** a brick. NO ONE was expecting My Baby to be that aggressive. I was in the ballpark of tweaked Cobra’s and Mustangs. I had more compliments than I could have imagined at this dyno day. I did try to get the GM to get me a 1/2 price tune and a sponsored paint job... He just shook his head and chuckled. Even the local cops love the car and have given me passes on 2 tickets, one for 100+ in a 50 zone racing a Camaro. BTW he gave the kid in the Camaro a ticket for racing, I beat that kid 2x. LOL Also, I am a fan of Mongo... RIP

[WDRacing]

The VH can and will make gobs of power without failing due to mechanical fatigue. It's a fairly high compression motor compared to most motors that are forced induction, that just means it requires decent tuning.

The key is eliminating knock. No knock = no engine failure. Knock will kill any motor no matter how well built it is. Conversely, removing knock allows for gobs and gobs of reliable power.

[Q451990]

Sounds like a ton of fun! Thanks for posting your dyno results.

I think it goes without saying that boosting an engine will decrease it's longevity to some extent, but if you're smart about it - you should be able to get good service out of it. Maybe not 300k, but it's kind of like living beyond 90... are you just prolonging the drooling and Depends years?

Heath

[smpresco9027]

THEM DYNO RESULTS......

[PapaSmurf2k3]

Just about every naturally aspirated engine's rods are designed for tensile load extremes, AKA redline. Adding compressive load via forced induction just balances the equation out a little better. Generally, you can about double your horsepower via forced induction before really worrying about rod failure. Some engines can go much, much farther.

Best of luck man. We need some videos!

[elwesso]

AWESOME JOHN!!! Great to see this come together, HUGE PROPS FROM ME. Who cares what the naysayers have to say, you have a turbo Q and they don't! If anyone clowns on a turbo VH45 they don't know anything about modifying cars period. The VH45 is damn near setup for boost right from the factory, it's a 500HP high performance engine that the factory had to detune and put an undergeared slushbox behind.

The 4.11 gears would be great with the stock auto, but it would be tire destruction if you had a 5-speed with it. Something to consider when the auto goes out..

What's your injector setup on the VH? I'd think at that boost you're looking at like Nismo 555's versus the 370s that come stock...

Seeing your setup makes me want to decompress my VH when it gets tired and run some stupid boost.... I really don't see a properly tuned setup really having any huge degradation in longevity... Now all we have to do is keep these engines a secret so that everyone else won't jump on the bandwagon!

[MinisterofDOOM]

Been a while since I've set foot in the Q forum...but this thread is a damn good reason to be back!

Looks like a lot of fun!

I really miss my Q.

[AZhitman]

The Aussies really do some crazy stuff with these... remember the TT VH in the Patrol?

Disassembling a VH tells you all you need to know - Anyone who's ever built a motor to handle big boost will see that it was over-engineered from the get-go. Eliminate the peripheral "weak links" and you've got a fantastic platform to make big power.

[Razi]

Those Australians really do love the VH.


This R34 runs at 7.85 thanks to the 4.6 liter bored and stroked VH.

Those are some amazing numbers John! I wonder if I can convince my mom to turbo her car...

[Q-ZILLA]

Thanks to all of you! I'm totally excited, driving the wife nuts over this car! I’m going on 5 years working on this car, a lot of time and money...

I have talked to the tuner today, he was well represented at the dyno day and no one said a bad thing about him, just the opposite. So after talking to him today, he's the guy to tune her. I have passed on 3 other "tuners"... Unfortunately he's a bit of a drive, but it's worth it for his reputation. He specializes in Nissan and used to work at that Nissan dealership w/ the dyno, they still use him for headache jobs. He has tuned a few VH's in the past he said and doesn't think I'm anywhere close to having problems yet. He agreed that this motor was built for fun and is much stronger than most realize! His first concern was after a tune, what transmission is in it... He laughed and said no problem after I told him about going through 2 OEM's and finally stepping up for my L10 S3.

ELWESSO; Believe it or not, I'm still on my stock 370's. I WAS going to bite the bullet and get 555's, along w/ a Ford Lightning MAF, but I noticed that on 4lbs; car was piggishly rich, 7.5psi; same thing. 12psi, still totally rich on my wideband, even without the methanol injection. So I popped it on 14psi and I haven't noticed any problems, no knocking/pinging AT ALL and it’s bottoming out my AFR on the rich side w/out meth. I know they’re getting a workout, but several turbo guys have told me it would be fine, because IT WAS a V-8 and I have 8 injectors. Now if Derrick-the tuner say's I need to change them, I will, but otherwise I'm going to save the cash. I also sent them out to GA to have them professionally cleaned a few months ago, well worth the cash.

I got those gears for the rear out of Australia from a Skyline R33. The company is Wholesale Car Parts Australia; EBAY ID: WCPAUS. These guys are real nice and INEXPENSIVE; about $360, including the shipping… From Aussieland!

Anyway, looks like I’ll be having My Baby dyno-tuned later this week or next. I’m so excited, I feel like a 12 year old before Christmas morning!

PS: PapaSmurf2k3; Thanks for the explanation, I feel better now. I was cringing while this guy dyno’d; slowly, and that was what I was worried about… Throwin’ a rod…

[AZhitman]

IIRC, that was one of the impressive things about the S/C Q from back in the day: It was running 5psi without ANY additional tuning, the ECU compensated just fine (and the injectors still had a LOT of cycle remaining).

[WDRacing]

Hmm...

Stock 370's and 14 psi of boost does not sound right to me. Are you sure your wideband is accurate? I could see MAYBE 4 psi of boost, but not much more then that. Unless you're using some sort of rising rate fuel pressure regulator. I would also not run more then 8 psi without water/meth injection being used to keep the detonation at bay.

Just because it's a V8 doesn't have anything to do with it, you also have 8 cylinders to feed. for example, the SR20 has 4 cylinders, low compression for boost, is a 2.0 and uses one 370 per cylinder. You have have a 4.4 iirc AND quite a bit higher compression. You need to look at injector size per cylinder, or total volume of fuel flow per cube of motor to feed. V8 simply means you have more cylinders, not that you have extra fuel lying around. You also need to consider retarding ignition timing while under boost.

Using methanol injection is a very good way to supplement your fuel and keep knock away, I just don't know how you're tuning it or if you're using it. This thread reads as if you just added boost and left everything else alone. If so, I'd say you're on thin ice.

What are you using for knock detection? What wideband are you using?

[Q-ZILLA]

Hmm...

Stock 370's and 14 psi of boost does not sound right to me. Are you sure your wideband is accurate? I could see MAYBE 4 psi of boost, but not much more then that. Unless you're using some sort of rising rate fuel pressure regulator. I would also not run more then 8 psi without water/meth injection being used to keep the detonation at bay.

Just because it's a V8 doesn't have anything to do with it, you also have 8 cylinders to feed. for example, the SR20 has 4 cylinders, low compression for boost, is a 2.0 and uses one 370 per cylinder. You have have a 4.4 iirc AND quite a bit higher compression. You need to look at injector size per cylinder, or total volume of fuel flow per cube of motor to feed. V8 simply means you have more cylinders, not that you have extra fuel lying around. You also need to consider retarding ignition timing while under boost.

Using methanol injection is a very good way to supplement your fuel and keep knock away, I just don't know how you're tuning it or if you're using it. This thread reads as if you just added boost and left everything else alone. If so, I'd say you're on thin ice.

What are you using for knock detection? What wideband are you using?

That's what I thought, regarding the fuel injectors... My wideband is an Autometer Sport Comp Wideband 3379. It shows I'm running completely rich with or without my methanol injection on. I do keep it on but it doesn't start till about 8psi and fully opens around 11psi or so. I was going to put in a different fuel pressure regulator, but was researching and found that the stock FPR increases rate with increased air off the MAF or something like that. So I didn't bother installing a different one, but bought a new one. I do have a tune from NICO on here for over 2+ years now, so the fuel maps and timing have been adjusted. Your right about leaving most items stock, I have bought new everything, but I also DO NOT have ANY knocking or pinging at all and the car runs cool. The dyno sheets are what they are. After hearing about the SC Q above, it makes more sense. Understand, I do not claim to be a master mechanic, but I've been running this RMT for over 2.5 years now, haven't had problems with it...

[WDRacing]

I'm not a Q or VH guy, so I can't say exactly what parts you do or don't have. I'm just a turbo fanatic. The stock fpr is one that probably raises the fuel pressure on a 1:1 ratio. The rising rate fpr I was referring to would raise the pressure on a 6:1 or 8:1 ratio. Basically adding fuel as boost comes on instead of using larger injectors. These are only good for 6-8 psi though, anything more and the pressure at the rail is to high. Although some guys over in the 240 arena are running 15 psi with a 6:1...it's more than I would recommend.

You say you're running a rom tune? Was it designed for a naturally aspirated motor? If so it's probably running way too much timing for a car that's on boost.

14 psi of boost is a lot. That's roughly the equivalent to a 150 shot of nitrous. So, thinking along those same lines, you're effectively adding a 150hp DRY kit to your car since you're not adding more fuel via larger injector. I'd say the only reason you're not detonating like crazy is the meth injection. I'd also say your wide band sensor is bad. It's just my personal experience that a set of stock injectors isn't going to compensate for 14 lbs of boost. I'm not calling you a liar mind, I'm just saying that your scenario makes me nervous.

Do you have a knock meter?

[Q-ZILLA]

I'm not a Q or VH guy, so I can't say exactly what parts you do or don't have. I'm just a turbo fanatic. The stock fpr is one that probably raises the fuel pressure on a 1:1 ratio. The rising rate fpr I was referring to would raise the pressure on a 6:1 or 8:1 ratio. Basically adding fuel as boost comes on instead of using larger injectors. These are only good for 6-8 psi though, anything more and the pressure at the rail is to high. Although some guys over in the 240 arena are running 15 psi with a 6:1...it's more than I would recommend.

You say you're running a rom tune? Was it designed for a naturally aspirated motor? If so it's probably running way too much timing for a car that's on boost.

14 psi of boost is a lot. That's roughly the equivalent to a 150 shot of nitrous. So, thinking along those same lines, you're effectively adding a 150hp DRY kit to your car since you're not adding more fuel via larger injector. I'd say the only reason you're not detonating like crazy is the meth injection. I'd also say your wide band sensor is bad. It's just my personal experience that a set of stock injectors isn't going to compensate for 14 lbs of boost. I'm not calling you a liar mind, I'm just saying that your scenario makes me nervous.

Do you have a knock meter?

No more nervous than I, but the tune was from QSIGUY's RMT install, not a NA setup. The WB is brand new, sensor is as close as we could get it to the motor. When I turn off the meth. inj. and hit 13-14psi of boost, again... No knocking or pinging at all. I did install new knock sensors about a year and a half ago, but I don't have a separate meter other than stock. Later this week or next, I'm taking it to a well-respected tuner in Sarasota, I'll be asking him quite a bit as he used to tune for Nissan and has experience with the VH, but after talking with him on the phone for almost an hour, he didn't seem alarmed. I don't know, I've been researching the hell out of all this and I tend to side with you, but my car says different, maybe My Baby is a freak, I don't know...

[WDRacing]

If it's a forced induction tune then it already has the timing being pulled out under boost, that's probably saving your motor right now. If it was a NA map, you'd be knocking all over the place without the meth. Do you have a means for looking at the knock through a consult or something? How do you know you're not suffering from knock? If it's audible to the human ear it's far too much. I use the MSD Knock Alert, awesome device that can tap right into your factory sensor.

The tuner will be able to hook you up and make sure you're running with a reliable tune. If he dyno's your car again, which I'm sure he will, see if he can plot the AFR's along side the rpm. I'm interested in hearing what he has to say.

I've been wanting to boost my 540i for awhile now. Tons of room for a remote setup.

What alcohol injection kit do you have?

[Q-ZILLA]

Needless to say, I will ask him to plug up every module he has, I only have EZ Talk and it doesn't have anything for the knock sensors. I don't have any fault codes popping up, although I don't know if a knock would throw a code for sure, but I assume it would.

[WDRacing]

With knock you want active monitoring. Regardless, boosted Q45's are pure sweetness.

Might I mention the amount of posts you have and the lack of pics?

[Q-ZILLA]

Your not the only one to point that out, I will try to get some up soon.

[elwesso]

If you need any help hosting the pics let me know. Send me an email.

[AZhitman]

Wes, do you recall the actual #'s on how far under max duty cycle the VH45 injectors were? I vaguely remember a discussion of it a while back, and people were amazed that they still had a LOT of room to flow.

The VH was SO neutered from the factory, it wouldn't surprise me if there was a lot of room left. Remember, this was a car that was marketed under the "gentlemens' agreement" to produce no more than 278hp. In reality, some of the early Q's produced over 300 at the wheels.

Such an underrated car, in more ways than one.

[Q-ZILLA]

Just got home, local racer night. Raced a 2012 Mustang GT, Manual, tuned w/ exhaust on a 40 roll. First pass; the Q launched, bye, bye Mustang. Second pass; better race but Q won, said he missed 4th... It's straight down.

Now boys and girls, street racing is against the law, but every once and awhile; You got to let the badger out!

[PapaSmurf2k3]

said he missed 4th... It's straight down.

HAHAH!
Seriously. I could see if it were a dogleg, but wtf?!

[WDRacing]

Auto's own drag racing