Update on the Turbo Q45

[sijoko]

Another thing I meant to ask was about mileage. How's the fuel mileage with the turbo? Any difference in daily driving. Better or worse?

Mileage is about the same. As long as you don't get into boost, the car drives pretty much stock so the mileage doesn't change much.

[sijoko]

If you were to build up another one how much money are you looking at? I remember on my old 240 I built up a cheapo turbo system for $700 so I'm assuming around a buck 20 for bigger turbo and bigger piping.

It's too early for me to give any kind of price. There are too many variables such as the cost of the turbocharger, exhaust tubing, flanges, etc.

[Haitian_King]

Boost burns more fuel? Say you're on the highway, at like 80 MPH. Does it decrease? So the car sounds the same until it's in the boost range? Wow. Ultimate Sleeper. How many kills?

If you were to build up another one how much money are you looking at? I remember on my old 240 I built up a cheapo turbo system for $700 so I'm assuming around a buck 20 for bigger turbo and bigger piping.

I think qsiguy originally budgeted like $1k for his rear mount setup. But Sijoko's turbo is bigger. I think qsiguy said Sijoko's turbo was like $1k alone.

[rsiwicki]

hey Sijoko!!!! Its me again from way back. Congrats on a fine job done and man...she pulls really fast. At first I did not think so but then after re-watching several times she really gets moving after the turbo lag is gone. that 60-80 & 90-100mph shot is amazing. Now go find yourself a M5 to go beat up on, LOL!!!

Your town seems so nice and peaceful with shops, people walking in the street, rolling hills, probably listening to the water running through the local creek and now all they hear is your turbo blow-off valve going nuts!!! Keep up the great work and can't wait to see more videos.

[sijoko]

Boost burns more fuel? Say you're on the highway, at like 80 MPH. Does it decrease? So the car sounds the same until it's in the boost range? Wow. Ultimate Sleeper. How many kills?

That's the beauty of turbos, they stay out of the way when you're not boosting. There's no reason that you can't get the same mileage as before if you drive off boost. As far as kills, none so far. The bugs are still being worked out plus I'm in the country side where there isn't much competition. LOL.

I think qsiguy originally budgeted like $1k for his rear mount setup. But Sijoko's turbo is bigger. I think qsiguy said Sijoko's turbo was like $1k alone.

I think both of us have gone over the $1k budget a long time ago.

[sijoko]

hey Sijoko!!!! Its me again from way back. Congrats on a fine job done and man...she pulls really fast. At first I did not think so but then after re-watching several times she really gets moving after the turbo lag is gone. that 60-80 & 90-100mph shot is amazing. Now go find yourself a M5 to go beat up on, LOL!!!

Your town seems so nice and peaceful with shops, people walking in the street, rolling hills, probably listening to the water running through the local creek and now all they hear is your turbo blow-off valve going nuts!!! Keep up the great work and can't wait to see more videos.

Ahh.....Rob lives. Good to see you on the board. I guess if you still had your Q, you would be the next in line for boost. I remember that you were probably the most hardcore of all the Q guys on NICO.

Yes, the car is fast. I didn't realize how much until someone pointed out the 0-100 in one of the vids. The time was somewhere around 11 secs, which is a big improvement from before.

I'll be turning up the boost shortly to 8 psi. That should net an additional 40 hp. Not bad for a simple change of a wastegate spring. I'm pretty confident the stock ECU plus the BEGI FMU can handle the extra boost. I am, however, looking at an inline fuel pump to help with fuel flow as the power increases.

I'll post some more vids once I get some more free time and the weather clears up.

[jamesmost]

Sj - great job, i want to give u my car next, reallyRs good 2 c uJAmes

[Haitian_King]

That's the beauty of turbos, they stay out of the way when you're not boosting. There's no reason that you can't get the same mileage as before if you drive off boost. As far as kills, none so far. The bugs are still being worked out plus I'm in the country side where there isn't much competition. LOL.

I think both of us have gone over the $1k budget a long time ago.

How do you stay out of boost? Say someone unfamiliar with your setup drives it. Can they inadvertantly "trigger" boost?

I'm so unfamiliar with turbos.

[elwesso]

basically the turbo only spools under load... So for instance, you could sit in park bouncing off the redline and it probably wouldnt be making any boost....

When you see drag cars with turbos youll see them brake torque until it spools..

If you dont put a lot of load on the motor, the turbo doesnt give off any boost because you dont need it... The engines exhaust is what runs the turbo, and if the engine doesnt make enough exhaust to spin the turbo really fast, no boost.

[Haitian_King]

Interesting. So does the sound of the exhaust change when not in boost? Like idling?

So if not exterior mods are done, this car could look (and possibly sound) stock from the outside, until the light changes? OMFG! SO COOL!

[ScottJackson]

That actually spools up about 500-1000rpm earlier than I thought it would. The Garrett TV75 turbos aren't exactly quick spooling unless you get them on a large displacement engine (or if you run a small nitrous shot also, which spools a turbo really fast). I still think a 60-1 or similar turbo would be perfect for a 12psi or less street setup on the VH. Just think what it'd be like if you got full boost at around 2000rpm instead of 3500-4000. Oh yeah! Anyway, my car is still bone stock (my dad keeps breaking our farm trucks and I still don't have a shop) so you're doing far better than I.

[sijoko]

That actually spools up about 500-1000rpm earlier than I thought it would. The Garrett TV75 turbos aren't exactly quick spooling unless you get them on a large displacement engine (or if you run a small nitrous shot also, which spools a turbo really fast). I still think a 60-1 or similar turbo would be perfect for a 12psi or less street setup on the VH. Just think what it'd be like if you got full boost at around 2000rpm instead of 3500-4000. Oh yeah! Anyway, my car is still bone stock (my dad keeps breaking our farm trucks and I still don't have a shop) so you're doing far better than I.

Yeah, you're right that a smaller turbo would spool earlier but it would not give me the top end of the larger turbo. The Garrett T-76 (aka TV7512) is not even breaking a sweat at the boost levels I'm running. But I have the option to up the boost and not worry about the flow limitations of a smaller turbo, both on the compressor and the turbine.

I know that a lot of Mustang guys are using the T60-1 but, if you look at the compressor map, there isn't much room left for growth. Plus, the smaller T4 exhaust side cannot flow as much as the T6 housing on my turbo. Yes, it's big but as you can see the spool-up is not that bad. The system was designed for mid to high rpm anyway. Plus, once the car is rolling, boost is available very quickly.

[sijoko]

How do you stay out of boost? Say someone unfamiliar with your setup drives it. Can they inadvertantly "trigger" boost?

I'm so unfamiliar with turbos.

As Wes stated, the turbo needs the engine to be loaded to really make boost. Until then, it is just spinning but without making any positive pressure.

The only way to get boost is to keep you'r foot in the throttle while accelerating. If you slow crept up to 4k rpm, the turbo wouldn't produce boost. I could drive the car up to 120 mph without ever hitting boost by just using light throttle.

So, yes, the car will behave like stock until you punch it when the turbo will wake up and deliver the airflow you need. Hope that answers your question.

[qsiguy]

That 4:08 rear end is definitely speeding up your 0-60 time compared to mine. Our boost seems to come in about the same time so I don't think I would go back to the stock diff if I were you.

Oh, ya and my budget very early on was around $1k but you'd probably need to mulitply that by about 3 to get closer to the actual cost of the parts alone.

[QShip]

Had I known you guys were that close to boosting the Q, I would have kept mine.

I had to buy a Titan and I added boost to that.

[maxnix]

I had to buy a Titan and I added boost to that.

Really? How? Applicable to VK45DE also?

[QShip]

I wish. I bought a Stillen supercharger. I'm waiting for them to release the 7psi pulley. I'm running 6psi now.

[sijoko]

Okay, here's a vid of the car on startup. I rev it a bit so you can hear the exhaust. Listen to the bark. I've got Spintechs underneath the car and two Ebay straight-thrus that I welded together for the rear.

http://www.youtube.com/watch?v=nzm0lOOpdVE

I received the 7.25 spring that I ordered so, hopefully, I'll get around to installing it. Gonna check my a/f ratios again to make sure everything is G2G.

I took the car on a relatively long trip yesterday, about 80 miles. It wasn't too bad. I'm going to put one more flex section in the tubing going to the turbo to minimize vibrations. I want it to be super smooth.

On the highway, I punched it at 80 and it was unbelievable. The 4.08 rear gives you great pull above 80 on a regular Q, but on this car it was scary. I need to get used to it. LOL. I never thought I'd say that about a Q.

[maxnix]

So you are running the 4.08, but have you corrected the speedometer drive?

Maybe t will mean turbo someday?

[sijoko]

So you are running the 4.08, but have you corrected the speedometer drive?

Maybe t will mean turbo someday?

I've been running a 4.08 since 2000. The speedo correction was done a long time ago. Yesterday, on my little trip I checked it against the mile markers on the highway. It is reading a bit slower than actual.

[Rex]

I've been running a 4.08 since 2000. The speedo correction was done a long time ago. Yesterday, on my little trip I checked it against the mile markers on the highway. It is reading a bit slower than actual.

Sounds like you're using the J30 speedo gear, it takes the error from ~15% to closer to 2%. I should fix that one day myself.

[sijoko]

Sounds like you're using the J30 speedo gear, it takes the error from ~15% to closer to 2%. I should fix that one day myself.

Yes, the J30 speedo gear is the biggest you can go on the Q45 VSS. I'm also running 255/45-17 tires so the error is very small.

[qsiguy]

So that's all you really need to do is a simple swap out to a J30 speedo gear from the stock Q45 one to correct the speedo if you do the rear end swap? Now that I think of it the donor car with my new rear end should have a corrected speedo gear waiting to be donated to my cause.

[sijoko]

So that's all you really need to do is a simple swap out to a J30 speedo gear from the stock Q45 one to correct the speedo if you do the rear end swap? Now that I think of it the donor car with my new rear end should have a corrected speedo gear waiting to be donated to my cause.

It's as close as you're going to get without having to resort to expensive blackboxes.

[sijoko]

It's been awhile since I posted anything about this project. Finally got a chance to take some pics today. I installed some vents on the hood for heat extraction. They are stainless steel louvers that I picked up from Ebay which I riveted onto the hood. I cut some holes underneath them to let the heat escape. There is a noticeable difference in coolant temps once the car is cruising.

Also, I did a vid of me just driving the car somewhat normal so you can get an idea as to how it behaves in everyday situations.

http://www.youtube.com/watch?v=pOxFzMferV4

Pics:

[maxnix]

Surprised it was so loud and raspy in the lower to mid frequencies. Also, I would think the boost would mitigate teh need for the lower 4.08 differential ratio.

So driving cross country, it was just like reguala G50 until you tipped it in to the boost? MPG estimates?

[Razi]

What happened to the hood? Are those vents functional?Reminds me of the A/C vents in my house.

[qsiguy]

I definitely see the need for the louvers, can't say I like it tho. I think I would paint them black to camouflage them. Those exhaust tips look beefie, I like 'em.

[sijoko]

Surprised it was so loud and raspy in the lower to mid frequencies. Also, I would think the boost would mitigate teh need for the lower 4.08 differential ratio.

So driving cross country, it was just like reguala G50 until you tipped it in to the boost? MPG estimates?

It's loud in the vid because the window is open plus I'm running Spintech mufflers which are not the best for noise suppression. Also, my Level Ten rebuild is going out and making unpleasant noises. I need to start looking for a replacement transmission soon. The 4.08 diff might get replaced also since the car builds boost faster in 2nd gear.

Driving the car from Oregon to Atlanta was pretty uneventful. It handled the mountain passes with no problems. I was passing the other cars like they were standing still up the really big passes.

When I got into California, I was passed by a Gallardo somewhere near Sacramento. I had to control myself and decided to let him go without challenge. Might have been interesting but I can't afford any tickets on my license.

The car was averaging between 18-20 mpg at speeds of 70-80 mph. That's not too bad considering that I have the lower gearing.

[sijoko]

What happened to the hood? Are those vents functional?Reminds me of the A/C vents in my house.

The vents are there only because I need them. I thought long and hard before I decided to install something but the turbo gets very hot after I drive the car hard so I had no choice. I had get the heat out someway. The vents are sold as generic stainless steel louvers so yeah they do look like A/C vents. LOL.