98 Supra to 550HP?
 

Any idea how much this woud cost? at the moment I am just looking around for supra's but have a found a '98 one that looks pretty good. anyway, would these parts get the supra to 500 HP?

adjust cam timing
adjust turbo timing and boost
add intercooler
get bigger fuel injectors
add air filter
install exhaust system

any ideas? im kinda new to the idea of car mods. all replies appreciated.

Do you mean 500hp or 500rwhp?

Getting an mkiv TT to 500hp (425rwhp) probably won't too hard/expensive (depending on the mileage on the engine & turbos), especially if it's a 6spd. I'd estimate at least $2000 for parts and $1000 for labor, including fmic, exhaust, and gauges.

If you're looking for 500rwhp, the only practical way to get there is a single turbo upgrade. This takes the prices up to $7K for parts and about $2500 for labor. You can't do this using the mods you listed above.

All this assumes the Supra you're starting with is in great condition, and has been properly maintained.

Lastly, note that you won't need to upgrade the injectors for 500hp or 550rwhp. The oem 550cc injectors do just fine up to about 550rwhp (645hp at the crank) through a 6spd (assuming they're clean, good fuel filter, good oem pump, etc.). Why did your mods list include getting bigger fuel injectors??????

im kinda unsure
 

thanx. fuel injectors... i just assumed they would be needed. im quite new to all this stuff and what is the difference between rwhp and hp? sorry im used to kw. and i means 550hp or about 400kw. sorry for the confusion and thnx for your help.

and yea the twin turbo im talking about. that has about 320 hp stock. also, would mucking around with the turbo timing, etc car tuning add extra power to the car? and is it possible to do it without a profesional or would that be recommended? thanx so much for ur time.

oh yea and what i've been looking at has around 60 - 100,000 km's (40,000 - 60,000 miles). and 98 models i think are best.

RWhp is horsepower at the rear wheels...for example, the power directly measured on a chassis dyno. HP measured on an engine dyno is power at the crank...before driveline losses. With a manual transmission, driveline losses are about 15%. With an auto, losses can be anywhere from 20%-30%.

Turbo timing alterations aren't necessary but you can raise the boost and get it to about 400rwhp (about 470hp at the crank, which is a great increase over 320hp) without changing the turbos! You can read more about 'bpu' here:
mkiv.com
...and here:
MKIV.Com Home of the MKIV Toyota Supra

Maintenance records and driving habits of former owner(s) is critical when looking at a Supra TT with some miles on it already. You'll want to have it professionally inspected by an objective, qualified, and above all experienced Supra mechanic before you purchase it.

Why do you think 98 models are best?

thanx again
 

hey, thanx for all your info. yea adjusting the turbo sounds like a good idea. 470hp sounds nice for that cost. what would the expected cost be to get it to about 550hp compared to about 750/800? just wondering.

and i just like '98 models. also, in general they have less miles on them and in better condition.

and that web link was great. (mkiv.com) thnx

Again, do you mean 750hp at the crank, or 750rwhp (at the wheels)? Cost difference is night-and-day...

not rwhp. at the crank. i will use the correct terms now., hp or rwhp. so approx. prices on those possible mods?

750hp = 637.5 through a 6spd. Getting an Mkiv TT to 637.5rwhp isn't too tough. You'll need a full fuel system (about $2K), a full turbo upgrade kit ($4K-$5K), a good FMIC (about $1500), exhaust ($500-$2000), clutch ($2K), ecu upgrade (eg MAP ecu) about $1K, and rims&tires to transfer all that new hp to the road (about $3K). You'll also need about $3K+ in labor to install all of this and get it tuned.

thanx.
 

wat about 550hp?

ok
 

sorry that last reply was rather short. ok, so if i moded it to 750 hp, would i need race fuel or anything? and would that become uneconomcial as a road car for travelling? because i dont want to have to spend 1000's of $$$ on race fuel.

also, just wondering how much $$$ to get it up to 550 - 650hp at crank. couple of grand?
thnx for ur patience.
martin :)

vv
 

oh and sorry one more thing. wat does fmic stand for?

I already answered that here (above):
http://www.toyota-supra.info/forums/54425-post2.html

Front Mount InterCooler.

Yes.

No

You only need to use race fuel when you want to make 750hp.

Each figure is different. 550hp is very different than 650hp. In general, anything over about 500hp at the crank will start costing a lot of $$$ because you have to change out ('upgrade') the turbos.

ok thanx that helped alot. maybe i'd just go for the limit of about 550hp, so i wouldn't need to do a hefty upgrade. that should also stay nice and economical for road use and wouldn't cost much to get it to that stage.

i don't have heaps of money to play around with riht now, maybe a further upgrade later on.

sorry i ask lots of questions, but any ideas on how much a nitrous system would cost to purchase and the ease of self-installation? :gotnos:

Um...I said 500hp not 550hp. 550hp=467.5rwhp (6spd), which is nearly unattainable unless your Mkiv TT's engine and turbos have near-zero miles on them AND you do a full set of bpu++++ upgrades. Again, what I said was, is 500hp yes ... but 550hp no guarantees at all - very unlikely without a turbo upgrade.

Kind of tough to self install, especially if you want a decent, safe install. Same with the nos kit - you can get it cheap (<$500), and blow up the engine. The nos kit gets expensive (>$1000+) when you add in all of the electronic controls and tuning necessary for it to perform consistently and keep the engine safe.

ok.
 

thnx for all your help. thats all i want to know at this stage.