My 550 RWHP Stock Turbo/Fuel Dyno.

2117 Views 21 Replies 10 Participants Last post by Steve Jarvis, Sep 20, 2001

lilviv

Discussion Starter · Aug 25, 2001 (Edited)

I'm excited, thought I'd post it here . . . I'm still in Dallas but will post up sheets . . .

My car ran a 550 RWHP and 526+ RWTQ dyno. today on 19.2 psi and a 75 shot of Nitrous. It's on stock turbos, stock fuel system (stock pump, everything), no Cam Gears, etc.

=) What's the record for stock turbo and stock fuel dyno.?

Edit:

Dyno. Sheet Now Online: http://lilviv.com/supra/speedprf.html
(Above Wheel Numbers ~647 Crank HP, ~618 Crank ft./lb. Torque)

1 - 20 of 22 Posts

weedwhacker

· #2 · Aug 25, 2001

congrats, awesome numbers....

i have the exact same setup, and am hopeing for the same!

p.s...isn't there any kind of fuel mods that needs to be done to run 550rwhp?...i wanna know before turning the juice on

G

· #3 · Aug 25, 2001

Careful; you're on the edge of the fuel system there.

BXR SUPRA

· #4 · Aug 25, 2001

Nice. Can you list your mods for me?

Hi-Psi

· #5 · Aug 25, 2001

Vivek, had fun today with the cars and congrat's on your amazing dyno...It is time to go SINGLE...

Kyle

Steve Theodore

· #6 · Aug 25, 2001

Be careful Viv. You don't want to end up like my car. I'd think about upgrading your fuel system pretty soon!

Awesome numbers!

Steve

Lagtime

· #7 · Aug 25, 2001

Damn Viv, that's awfully impressive!

For piece of mind (better than the motor in pieces

) a walbro pump and the BD bypass might help you get away with those numbers a bit longer.

Steve Jarvis

· #8 · Aug 25, 2001

Phillip Long did 550rwhp and 640rwtq with stock fuel and stock turbo's. He did add a larger wire to his fuel pump to get a little more voltage to the pump. The interesting thing is he wasn't running lean (12.0:1) where he made 550rwhp (5,000-5,800rpm), but he was lean (13.0:1)where he was running 640rwtq (4,400rpm). I am going to go single with a T66 and stock fuel. My goal is to see how far I can go until I can no longer maintain at least a 12.0:1 a/f ratio. I am still a ways away since the insurance company has yet to give me an offer on my car but hopefully this will happen in the next 4 months. My plan is to be able to run 18psi on pump gas and make at least (510rwhp). Basically this will mean I will have a 600 crank horsepower car for the roadcourse.

Later, Steve

Lagtime

· #9 · Aug 25, 2001

Originally posted by Steve Jarvis:
<STRONG>Phillip Long did 550rwhp and 640rwtq with stock fuel and stock turbo's. He did add a larger wire to his fuel pump to get a little more voltage to the pump. The interesting thing is he wasn't running lean (12.0:1) where he made 550rwhp (5,000-5,800rpm), but he was lean (13.0:1)where he was running 640rwtq (4,400rpm). I am going to go single with a T66 and stock fuel. My goal is to see how far I can go until I can no longer maintain at least a 12.0:1 a/f ratio. I am still a ways away since the insurance company has yet to give me an offer on my car but hopefully this will happen in the next 4 months. My plan is to be able to run 18psi on pump gas and make at least (510rwhp). Basically this will mean I will have a 600 crank horsepower car for the roadcourse.

Later, Steve</STRONG>

My guess is that he went lean around peak torque due to the fact that the nitrous shot is a fixed size, the amount of O2 it contains is the same. Since the motor had more open intake valve time at the lower RPM more nitous was fed to the motor causing the lean condition. This is why you don't want to spray too early, also.

Plus it's safer to do this on a dynojet, which has FAR less load than say 4th gear in the second 1/8th of a quarter mile. Any shortcomings in fuel will show up a lot faster on the street than on the dyno.

G

· #10 · Aug 25, 2001

Originally posted by Steve Theodore:
<STRONG>Be careful Viv. You don't want to end up like my car. I'd think about upgrading your fuel system pretty soon!

Awesome numbers!

Steve</STRONG>

Steve, what happened with your supra? did it blow runing lean?

Steve Theodore

· #11 · Aug 26, 2001

Not completely determined at this time, but the new owner will be disassembling the old motor and will find out for sure. Every indication is that it threw a rod, and it wasn't while driving it hard either. Happened after I'd already negotiated the sale of the car, and I was only driving it to charge up the battery and to fill up the tank.

An expensive ending to my Supra ownership, to say the least.

Steve

Zerosoul said:
Steve, what happened with your supra? did it blow runing lean?

lilviv

Discussion Starter · #12 · Aug 26, 2001

Thanks for the comments on the numbers, I was excited, and it was more than I had hoped for.

I was a little scared about the fuel situation . . . I was told that the stock fuel pump will hold 'round 525 RWHP, but I never imagined I'd hit that.

Bottle pressure was low, we heated up the bottle to about 1000 psi, and then . . . bam, 550 RWHP, and it would've gone much higher, but the clutch gave way at that peak. We had clutch issues on earlier runs, and our solution was to wait 'til after the turbos came online to high boost, then hit the spray at around 4500 rpm. That's what we did.

I wanted that Walbro fuel pump, and I initially planned to never spray until I had that, but I ordered it well over a month ago . . . and, I never received it . . . turboimports.com had it on order forever, and it's on backorder, they say. So, I'll keep the order and hopefully just get it when it's off backorder. I'll take it easy and lower it to a 50 shot until then (which is where I put it after that run). I will do the BD Bypass mod. also, when that comes in.

Again, I'll post sheets when I return to Austin. Also, is it safe to spray a 50 shot on pump gas?

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RSA Supra

· #13 · Aug 31, 2001

:drooling:

G

· #14 · Aug 31, 2001

yes...you can run a 50shot on pump gas...just make sure you dont have the timing way advanced...on pump gas with alot of timing you may have detonation problems...its ideal that with nitrous you are supose to retard your timing 2-4 degrees for every 50shot...and that bottle pressure you ran for that run was perfect...optimum bottle pressure is between 900-1000psi...for more of an edge you run 1100psi..but 1000psi was just fine...nice numbers.

lilviv

Discussion Starter · #15 · Sep 3, 2001 (Edited)

Dyno. Sheet ONLINE!

Well, finally got the dyno. sheet scanned.

http://www.lilviv.com/supra/550dyno1.jpg

Let me know what y'all think . . .

Post Edit: I read it wrong, I was not too lean . . . too rich.

MADMKIV

· #16 · Sep 5, 2001

No offense but let the guys w/ MKIV experience answer this... How you tune and how they tune are 2 different worlds.

My94Pony said:
yes...you can run a 50shot on pump gas...just make sure you dont have the timing way advanced...on pump gas with alot of timing you may have detonation problems...its ideal that with nitrous you are supose to retard your timing 2-4 degrees for every 50shot...and that bottle pressure you ran for that run was perfect...optimum bottle pressure is between 900-1000psi...for more of an edge you run 1100psi..but 1000psi was just fine...nice numbers.

G

· #17 · Sep 6, 2001

MADMKIV by all means bro..go ahead and tell him what to do then...but im letting you know...anybody that produces nitro systems advise's that you retard your timing 2-4 degrees for every 50shot of nitrous on ANY car.

so since you say let the people with MKIV experience answer his question since you i know nothing about supra's and own a ford...are you implying that right now you could slap on a 50shot nitrous kit and have to not do ANYTHING to your timing what so ever???? Cause if you are your pretty damn lucky to not have detonation problems...you can call any nitrous distrubeter and they advise that its in your best interest to retard your timing 2-4 degrees for every 50 shot

G

· #18 · Sep 12, 2001

are you implying that right now you could slap on a 50shot nitrous kit and have to not do ANYTHING to your timing what so ever????

Try a 150 shot. Aside from the Apexi ITC or standalone engine management, you cannot adjust for timing on the fly. The computer controls everything, helped by very sensitive knock sensors that signal the ECU to retard timing.

I run a 90 shot of NOS, and I have a completely stock ignition.

G

· #19 · Sep 12, 2001

ok so no matter how you put it...by slapping on the nitrous you will still be pulling timing out even if it is a computer doing it...im sure you cant slap it on without the timing retarding at all...and if your setups do...i want one

G

· #20 · Sep 18, 2001

I am completlely ignorant on the timing subject, can someone explain that to me? how does timing effect hp?

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