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What do YOU think?

  • Go HAM. It's fine.

  • A day or two at the strip or track should be ok.

  • A launch or two on the street, but that's it...no prepped surfaces.

  • Keep the boost low and you're golden.

  • Launches are fine...watch the 3-4 shift.

  • You're doomed. Pull the engine now while it's still in one piece.

  • How TF is it still running?

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Discussion Starter · #1 ·
So. Got my car last week. The more people I talk to, the more all over the place the responses as far as the overall "fragility" of the car/build become. The car is basically just FBO with bigger turbos. The previous owner installed:

Intakes
Downpipes
Mid-pipes
Exhaust
1300cc injectors
Dual Walbro 450s
Flex-fuel kit
AMS IC
IC piping
HKS GT1000 turbos

...and a couple other odds and ends. Found a video of the car on the dyno where it made 815hp/660tq on E85.

Now...no idea why the previous owner dropped almost nine grand on turbos instead of doing the bottom end and the transmission (which is what I would have done...) but that's what he did. And from what I understand, 660tq is pushing it, but this isn't the tune that's on the car now. It's not making that much power anymore.

So...I'm going to be getting it re-tuned soon...I'm definitely going to build the engine and trans as soon as possible, but in the meantime, I'd like to get as much out of the car as I safely can. If I kept it around 600-620tq, how safe do you think it is with the stock engine and trans? I've heard all KINDS of different things. What do YOU think? Vote above!!
 

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Discussion Starter · #3 ·
I'd be interested in what you've heard.
Seriously everything from "don't launch it" to "the stock trans has been 9.2" to a tuner yesterday telling me (and I'm roughly quoting) "it's a grenade with the pin pulled"...I was under the impression that, as long as you kept things below 650tq, you were fine. Hearing lots of different stuff now.
 

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Discussion Starter · #5 ·
I'll add, don't keep hot lapping the car with back-back-back-back-back pulls when the fluid temps are high (230F+). Give it some time to cool off. Also know most folks don't run the kill map and full boost on the street.
230. Got it. Good to know. Thanks!

That said, although I'm no official source, I'm on my second turbo upgraded GTR on stock drivetrain and block. This is not advice but my general comfort level with the car after seeing the results and talking with owners who have been down the same road from start to end.
THIS is EXACTLY what I'm looking for. That's what this thread is for. To create a "crowdsourced consensus", if you will. You could ask 5 people a question and get 4 different answers, but if you ask 500 people, you can get much more reliable info.

Everything people have told you not to do, I've done as have other owners that have similar mods and we've been to Mexico more than one should. Plenty of 60-130 pulls with that 3-4 shift. I have over 30 recorded TC-off launches at the track on prepped surfaces and plenty of others with R-mode launches on R888Rs.
Cool to hear. Don't get me wrong, I'm not going to be like, "they said I'm good!" and go drive like an ass. It's all about seeing stories, experiences and info from as many people as I can so I can best judge what is most likely safe and not safe to do with the car. Perfect. Thanks.

All using BOTL set at 1.3 BAR or higher which is what my tuner recommended as a starting point.
Is this another way of saying "launch control"?

There's not some magic black/white answer and it'll come down to what you're comfortable with based on the history of the car that you do have. There are shops that do warranty similar setups for a year with unlimited mileage (using their tune) so know this isn't some new level of upgrade with unexpected outcomes.
This is actually one of the main reasons I've wanted one of these for so long. Seeing what the aftermarket and community has done and how far it's come as a platform has been SO cool!! That's also why I was a little surprised to get such varied responses regarding "dos and don'ts", but still...TONS of knowledgeable, experienced people out there and I'm all about it! I'm all ears! (...er...all eyes? lol)
 

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Discussion Starter · #7 ·
Again, not an absolute number but what I'm comfortable with. Some like to and can push it much higher but they may not be pushing the power limits or the stock trans/gears. At the most recent track day a few weeks back, the participation for the roll racing portion of the event was sparse so we were able to hot lap as many times as possible in the span of an hour. I elected to sit out after 6 passes and cool things down when the temps were closer to 230F. Could I have kept going? Probably.
Hey, I'd much rather play it on the safe side.

BOTL is boost off the line which is often used with launch control.
Hmmm...never heard of that.
 

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Discussion Starter · #13 ·
I would build the short block.
I have a bonus coming and I'm thinking that may just happen. 😁 (EDIT: I coulda SWORN that was $7500 just a couple days ago...hmm...)

Someone in a Facebook group had a good point...blowing the trans up sucks but can generally be rebuilt...window your block and you're in for a world of hurt. lol
 

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Discussion Starter · #21 ·
Speaking of tunes. I don't have any dyno numbers but my tuner just posted a dyno sheet and Dragy data on FB from another stock motor/trans upgraded turbo car he just finished. We ran almost identical numbers except my DA was +6000 ft higher. I'd kill for a -500 ft DA but it isn't going to happen here in Colorado. Not saying you shoot for these power numbers as a goal but the numbers can be replicated if you're comfortable with them and the TQ figure is still under the consensus limit of 650 ft-lbs.

Dragy graph #1 is the car he just recently tuned with the corresponding dyno graph below and Dragy graphs #2 & #3 were from my car a few months back. The 9.87 run was cut short.

View attachment 402874

View attachment 402875
Looking good! I'm still working on getting the tune redone...it's honestly hard to find people that reply to emails. It's like, "I've got a few hundred bucks for you, can you reply to my email please?" :ROFLMAO: Ivey replies pretty quickly, he just doesn't say anything. lol

But yea...I'd be super happy with that! Once I've gotten it dialed in and reliable, I don't see myself doing any more power mods any time soon. Famous last words, I know, but I'd be super happy with a high-9-second car like that for the foreseeable future. That's a good goal. To go beyond that, gotta start building things, which I'm sure will happen eventually, but that's a great "stopping point". Looks awesome!

Those runs are using LC, I assume? Still haven't launched mine. Hahaha
 

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Discussion Starter · #24 ·
Yup. For now, I've got a fuel pressure sensor going in on Tuesday, then it's getting re-tuned. I want a solid but somewhat conservative tune that I don't have to worry about (as much). Definitely going to build things ASAP. I'd REALLY like to build the bottom myself. I'm a big time "red button syndrome", gotta see how stuff works, DIY type. It'd be fun, I'd learn a lot and hey...it'd save some coin which would be cool, too. Definitely rolling the idea around...
 
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