Well, I guess I'm biased, but I've had a supercharger/single turbo, and now twin turbos.

The current twin turbo setup is by far my favorite. Makes the most power and has the quickest response.

A single T88 would make the power, but from all the dyno graphs I've seen of those setups, they don't even break 300rwhp until 5,500 and then the graph shoots straight up. That would probably work great in a high stall automatic, but it might feel lazy on the street with a 6-speed.

And 1000+rwhp is definitely possible for a properly set-up Supra. An engine that will take 40+ pounds of boost, 4-valve head, and what, 8,000+rpm potential. Those dyno sheets tell me those cars wouldn't be that fun on the street, as they maybe hit 200rwhp by 5k, and then reach 1000+ by 8k? (my #'s are a bit off I'm sure, but that's the basic idea).

As far as the driveline is concerned, I broke multiple T56's, and recently got my trans done by G-force (crossing fingers). My 12 bolt breaks on a regular basis.

Your power goal can be accomplished, but probably not the reliability level you are looking for.

(and don't forget there will be much more maintenance, it's not like you will bolt the car together and just drive it for 20k miles)

 

What ratios do the guys with the T88s run? There's got to be a way to make them spool up faster for better response on the street. Having a street car with 200 hp to drive around on and 900 hp at 7000 rpm is no fun.

 

Having a big enough gear to use the higher rpm would suck. That would just add to the traction problem. To each his own, but why would you have that much more hp than you can use?

 

It is possible, but not very likely with either a blower or a turbo as far as streetability and reliabilty are concerned. Build an all forged motor and run a fogger system set-up for about 500 extra horses and you should come pretty close theoretically, you should still have a fairly reliable motor (if it's all forged) because you won't be making all that power all the time. The stress on the piston's rods, crank etc. wont be as much as with a blower or turbo 'cause you'll only make that kind of power when the Nitrouse is activated.

Just a thought...

 

Sorry, but at that HP level, turbo(s) would by far be the easiest on the bottom end.

 

On this I tend to agree, even a progressive controller it would still hit hard.

Ok so 1000 at the wheels isnt practical then what is? 600 I think is pretty attainable. Around here there are a few, 450 RWHP Na motors and a 175 shot...... The thing is they are an absolute bitch around town. I want to be able to get around these guys.
SO lets say 800 then.....that should be more attainable egh?

 

Well, 800,900,1000+ rwhp is all attainable, but cost is exponential.

 

I meant the housing ratios on the turbo. With 1k hp, rearend ratios aren't a big deal, the tires are going to be smokey whether you're running a 2.73 or a 4.56.

 

Yes, that is sure correct. You and I seem to be the only posters in that range, with "just" 800-900rwhp. I can say, with confidence, that there is a BIG difference in terms of cost, reliability, streetability, etc. between 600, 700, and 800rwhp. I have come to the conclusion that if you want a street car that appraochs 1,000rwhp that it had best be done with a big block. A big aftermaket based small block would be the next best choice.

As far as 1,150rwhp from a Supra, I never said it wasn't possible, just that it would be a time bomb if the thing were used at peak boost/rpm more than very, very rarely.

Rich

 

carnutz-do you want to get around these guys on the street or the strip? I am not sure of how you drive on the street as far as tires are concerned. With even et streets, I can imagine trying to hook 800 rwhp is crazy. These guys you know with the 450na and 175 shot. What are there weak points? If it is traction, do you wonder what yours will be? If not, by all means, good luck with the 800 hp level. Good luck either way for that matter.

Must be nice for money to not be an option

 

OMG, yet another thread about someone seeking to make 1000 rwhp in a LT/LS1 street car! There have been numerous previous threads at this site, ls1.com and ls1tech.com on this subject. Some of the points on which there was general agreement:

1. It will take at least $50 to $75k to make 1000 flywheel hp in a LT/LS1 car.
2. Such a car would be dangerous and uncontrollable on the street (I know, I am in the process of selling my LS1 Camaro, which can make over 900 rwhp).
3. It would be much less expensive and time consuming to make such hp with a bbc.
4. I can count the 1000 rwhp cars on one hand.

 

I have never heard turbo cars making so little horsepower before such high rpm's. Which concerns me because I dont want to have to rev real high to make decent power. I was goin to go with a single t-80 on a 383, i figured it would make significant power(understatement) throughout the power band and still get to keep my A/C and other accessories, but not if its not gonna make 300 horse and 5500 rpm
How was the power band on your single compared to the twin? And what accessories did you have to lose?move? Any other info would be appreciated also.
-Mark
Sorry guys a little off topic

 

It would be nice to see another fast car around town. Right now the only car that would be fun for me to race is my buddys T88 camaro, but that thing is always down. I built my car when street racing around here was a happening thing. After all the bugs got worked out, finding a race was like finding water in a desert. Sure its fun to have a car that is pretty much untouchable, but it would be better if I could put it up against other low 9/high 8 second cars. Lately the only fun I have is racing modified bikes. Now days I have more fun riding my R1 around town. At this point I might even consider selling my car for 50K.
Anyway, as far as reliablity goes, I trust my camaro more then my stock talon. I drove the camaro everyday all last season with out any problems what so ever. I ran into one bug this year, but that is worked out and the car is back to its ways. After beating on my car for a entire season, burning over 100 gallons of race gas, I began to trust it. I even took it on the power tour in June. Did some racing 1000miles away from home. If that is not trust in a car I dont know what is. IMO is a 1000hp car reliable, yes. However, what makes it reliable, the best parts money can buy.

 

What does your car run? (if you still streetrace, nevermind)