Supra Vs V8 Firebird Auto

Alright... I have a 1989 Supra Turbo Manual... N all i have done is shimmed the washgate n i gutted the cat, n put a cold air intake on it...
Now i have a cousin who has a V8 Firebird Automattic n she wants to race me for $100 heads up on about a 1/2 mile street.... now the firebird hasnt had shit done to it, totally stock... scept for seat covers. lol. Now i jus wanna race her 4 fun kuz imma lil weary.. ive raced a v6 camaro n smoked the shit outta it, but it was a v6... so whut do yall think i should do?¿
Hit me bac aight!

aright, here's what i think. . .off the line, the firebird will probly beat you, but as soon as you hit 2nd you should start to beat the firebird. i know the supra doesnt have too good of a start becuz my bro has an 89 turbo. dont go on what ive just said, wait for other people to comment, i wouldnt want to be the reason y u might lose 100 bucks.

id say go for it man. i raced a firebird in my celica and barely got beat. i think you could take the firebird.

no problem at all..you'll eat up the v8 :D

If its a 93 and up LT1 or LS1 DONT DO IT, you will get smoked.
if its an 89 and up TPI 5.7 youl most likely get smoked. if its a rust bucket small block V8 rebuild DO IT you may smoke her. SO remember check what kind of firebird it is, if its a TransAm be carefull cause you will probably get smoked

ummmm well....:(

Oh I think you could easily take him, unless it's a WS6 he might give you a good run, but since you got that turbo, manual, lighter car, you definatly have the advantage. well I'm pretty sure the 93 and up Firebirds run a 13.9 if your Supra is faster than that you could take em!:bigthumb: GO SUPRA GO!

i dont know man...mkiii's arent exactly speed demons
maybe between now and then you could hook yourself up with a boost controller and up the boost a little...but only within the limits of your turbo...
do some research as to what the max boost efficiently is on your turbo

You should just go to a local performance shop and spend $50 on a cheap manual boost controller...You'd definately win after that.

Originally posted by DensoSupra
You should just go to a local performance shop and spend $50 on a cheap manual boost controller...You'd definately win after that.

until he hits fuel cut.

i wonder where it kicks in in the mkiii's

Originally posted by RScott


until he hits fuel cut.

i wonder where it kicks in in the mkiii's

You shift before you hit your fuel cut...duh!

youre dumb.

Originally posted by RScott
youre dumb.

well i must be missing something if i'm dumb...what?

if you shift before you hit fuel cut...theres no point to the boost controller because youll be stuck at low rpms + no full boost
the adverse affects will outweigh the benefits

You hit full boost pretty much right when the turbo spools which is probably like 3,000 rpms on a stock mkiii.

then you will hit fuel cut.

basically what im saying is he needs a BCC type thing to go with it...
you cant just up the boost to the turbos limits and call it a day
theres other things that go with it

why would you hit fuel cut when the turbo spools? fuel cut comes on at redline...or am i somehow mistaken?

you are very mistaken.
fuel cut happens when you boost too high
its a safety feature of the ecu to prevent overboost. on the mkiv it kicks in at like 13-15 psi

:screwy:I believe you're the one that's mistaken, my friend. I think you misunderstood something you heard or read somewhere. Cutting the fuel to the engine is a very odd way of preventing over boost. I've never heard of a fuel cut being used this way. I don't know Supras well, but this is very strange. The only over boost protection I've ever heard of is on the 300ZX twin turbo (90-96). The engine will go into safety boost if detonation is detected and safety boost is not achieved with anything involving fuel sending.

RScott is just being a fucktard.

There's a fuel cut wired into most turbo car's ECU's that cuts the fuel to the engine if the boost level go past a certain point. I just had a little misunderstanding before.

He's still being stupid. Stock boost on that car is probably 7-10psi. He could probably take it to about 14psi and gain a ton of power. Anything over that and you'd most likely be hitting fuel cut... unless you spend another $150 on a fuel cut defenser which completely eliminates the fuel cut.

MKIII's have FC at about 12psi with no boost leaks, although most people hit it before that cause of heat or countless other variables. A Lex/550 setup will raise FC to 18psi with no defenser and flow the 25% more air/fuel to the engine. Two different cut defensers, the HKS FCD and the Greddy BCC which will raise it even more. As for the fuel cut, it's not all that strange as rotory's actualy cut fuel, Supras actually cut spark not fuel, based on airflow through the AFM.
EDIT: Just saw your post densosupra, boosting anything over 12psi on a stock CT-26 will be blowing nothing but hot air, and scott definetly has it right.

everyone in here seems to be under the impression that because the firebird is an automatic, it is slower then a six speed. in reality, it's both faster, and more consistent. if this girl is on normal tires, it may be a good race just for the simple fact that she will go up in smoke. if she has any sort of street slicks, she is going to murder you in your current state. if you choose to do some mods like a boost controller, etc. then you may beat her. as it stands right now though, i give my vote to the firebird.

faster drag but top end falls off for autos. You have to remember that autos arent as efficient as manual cars since they work on a fluid clutch (torque converter). depending on the year of the firebird, the mkiii will either get beat or smoked. I wonder how this race turned out or if it even happened seeing that it was posted like 6 months ago.

Project and Scott are both correct. If you try to up your boost without eliminating any of the defenses your ecu has already programmed in, you will hit fuel cut. I would recommend getting a BCC to compensate your fuel cut. Finish your exhaust and you will most likely not even need a boost controller since your car will most likely up the boost on it's own( my MKIV did ) other than that you should be set, good luck :)

Get the boost controller and a FCD I would spent $1000 before I lose $100 to a chick in firebird

:screwy:I believe you're the one that's mistaken, my friend. I think you misunderstood something you heard or read somewhere. Cutting the fuel to the engine is a very odd way of preventing over boost. I've never heard of a fuel cut being used this way. I don't know Supras well, but this is very strange. The only over boost protection I've ever heard of is on the 300ZX twin turbo (90-96). The engine will go into safety boost if detonation is detected and safety boost is not achieved with anything involving fuel sending.

Let me ask you a question.. When you let off the gas when your pressure is spooled up what happens?

http://www.hksusa.com/categories/?id=1925

Now once you answer that you would understand why taking fuel away prevents over boost.

Class dimissed.

wow u would get smoked its a v8 buddy v8s own v6s and i know it depends on other shit but seriously ull get killed if its an ls1 they have 350 hp and run 13.0s and have a top speed of 167 mph

Why did you bring back this antique thread only to contribute that wonderful tidbit of biased information? :rofl:

i know plenty of v6s that can smoke v8s, hell i know 4 bangers that can smoke v8s. firebird would beat mk3 prob. but mk4 would smoke the bird

wow u would get smoked its a v8 buddy v8s own v6s

WHAAAAAAAAAA HA HA HAAAAAAAAAAAAAAAAAAAAAAAAAAAAA HA HA HA HA HA HA HA HA.............. :screwy: Thanks for the laugh!

What year is the Firebird?

There is going to be a new rwd V-8-powered Pontiac coupe.

GM reverses course, says revised version of Zeta rear-drive architecture is back on track

Automotive News

9/12/05

DETROIT - Six months after General Motors halted plans to use its Zeta rear-wheel-drive car architecture in North America, the company has revived the program.

In an interview with Automotive News last week, Jim Queen, GM's vice president of global engineering, said a revised version of Zeta is back on track.

Engineered at GM's Holden subsidiary in Australia, Zeta was expected to be the basis of the next-generation Pontiac Grand Prix and GTO; the Chevrolet Impala, Monte Carlo and a new version of the Camaro; and other vehicles. Vehicles in the program were expected to debut as early as 2006.

Queen did not discuss vehicles on the new version of Zeta or timing. Some vehicles that could be in the Zeta program include the next-generation Pontiac GTO as well as a Chevrolet coupe and sedans. They could debut by the 2009 or 2010 model year, say one company source and one industry analyst.

Queen said initial plans for Zeta stretched the architecture beyond its limits for some North American vehicles. "We needed to reassess and reconfigure the program," he said.

"As we started counting who was in and who was out of Zeta, we realized too late" that Zeta would not work in North America, Queen said.

Part of GM's reasoning in slowing Zeta's development was to focus on pulling forward its full-sized SUVs and pickups. GM's next-generation SUVs will debut early next year.

At the time, GM Vice Chairman Robert Lutz wrote on GM's FastLane blog that GM had "canceled & plans to build rear-wheel-drive vehicles off the Zeta architecture."

"But that does not mean we've canceled plans to build rear-drive vehicles altogether," Lutz wrote. "We are simply reallocating resources (human and financial) to pull some other programs ahead and get other vehicles to market sooner."

The revised Zeta program is being developed in GM's Australian engineering center. The vehicle line executive on the program is Gene Stefanyshyn, the former vehicle line executive for GM's Epsilon, or mid-sized cars, in North America.

A GM spokesman said no product plans have been approved and that GM still is studying design themes, performance characteristics and variants for Zeta vehicles.

GM uses the term "architecture" to signify a common set of components, performance characteristics, a common manufacturing process, a range of dimensions and connecting points for key component systems.

I just did this race like 2 days ago in my 1987 Supra N/A and beat my friends 94' Firebird (Automatic). You should be able to dust it with your turbo.

I hope this thread goes away some day soon...

The race happened 2 1/2 years ago. Wake up.