At one time i had v8 swapped tii coupe and my turbo convertible. I could drive them back to back. Totally different cars.

For sake of this discussion lets say that a rotary street car 350-400 is the sweet spot of being enjoyable to drive but not where its out of control.
I would say 300hp makes it where you dont have to be so mindful of the power where you cant get into it a little more often. You need a good stretch of road to wind out a 400hp rx7

 

I agree with a lot of you guys my fc use to have 416hp, (high boost) 360hp, (low boost) at the wheels and it was a hell of a lot of fun but still too much for the street unless you had some nice straights to play with it.

it was scary passing cars as with my setup there was virtually no lag so as soon as I cut down to 3rd I was past and at 180 and having to slow down now my car is practically a race car it weighs only 2400lb wet with roll cage with big tyres so not your average.

I now have 550hp atw (high boost) 480hp atw (low boost) and I slightly regret it it's so stupidly powerful that I can never get traction or utilise it on the street as soon as I hit boost (after 4500rpm) I can't see behind me with the smoke ( not the best way to be discrete about it) so now it's only road legal to drive to and from the racetrack.

Road car max 400hp In my opinion if I could go back I wouldn't go above 420hp

 

I made 282whp on a fully stripped 88TII. On my mostly worn 255 tires (falken 452s,I think). Rolling into second gear would grip till about 4500-5200 rpm and then it would do this mild wheel spin, that got worse the higher it reved, and could get you into trouble as it wanted to steer the car to the left. And if i shifted hard from 1st into 2nd i'd spin tires the whole gear and spin a tad goibg into third. Now with nitto nt05's (255's). The car is a lot safer. Traction is tamed. Currently at 7psi- If I do go to 15psi I will reach the 350whp mark and I'm sure I'll be having the same traction issue again if not worse with the good tires.

 

Fc benefit from torque in autox because second gear is so bloody long. I hated auto crossing even in my stock turbo setup. 1st gear was to short and second was toooo long. Leaving me to try and make the best out of. 2nd gear 2000 to 3000rpm corner exits just to shut her off and slow down for next shitty corner by 4000- 5000rpm. I always wondered what 4.33 or 4.77's rear gearing would have done for me.

 

Well, People Can make some predictions on my cars HP. its currently getting tuned. What Kind of POWER will I be looking at 15psi?

87 GXL
S5 TII Rebuilt - Stock Ports
GT35R T4 1.06AR
725cc/1600cc Aeromotive 340LPH
Haltech PS1000
AFX Wideband
AEM WI
FMIC
KOYO Rad
Apexi N1 Dual Catback w/RB presilencer

 

Just the right amount

 

^LOL

350RWHP @ 14psi

 

I'd say you made a good choice leaving it stock ports. You might lose a bit of power up top but down low it wont feel so anemic in your cruising range.

 

actually the short answer to the original question is either 78hp or 300hp. with traffic 160hp is either way more than you can use, or about half the amount you need. with 160hp you can't use it, because there is always a toyota in the way. with 78hp you'd get to use it, and still have enough left over to be faster than the muggles. with 300hp or more, you have enough power to treat these people who are in a car on the road for no reason, like cones at an autocross.

to the second question, 340hp at 14psi sounds about right, could be a little more depending on which ducks you have and how well they line up

 

335-355 whp@ 1 bar is my guess. You'll love it.

 

i hope i don't break anything lol. is there any drawback in using water injection at 14-15psi? tuning guy said u need WI after 17 psi

 

There's really nothing to gain from it. If you go over 15 and have no way of monitoring EGT you definitely want to use the meth, anything past 15 people normally tune with it.

My 35R was starting to choke at 6500RPM@15psi because of my exhaust(hollowed out cat, some bends could be smoothed and its an RB catback) and the hotside. My meth kit puked as well so after we hit 350 wheel we stopped.

It looks like you have a more free flowing exhaust, but no engine porting. I'm interested to see what numbers it puts down.

I still have some unknowns with my car because I bought it with the turbo kit and fuel system installed. I fixed a bunch of wiring and got it to run much better. Max HP was a little better than the previous tune but I picked up more tq and a bunch of HP throughout the power and so it was worth it. I'd post the dyno sheet but my dumbass accidentally threw it away and I'm trying to get another one but the pulls from that day may have been deleted.

 

I will post as soon as I hear back from the shop. I been waiting 4 way too long.

 

agreed 300-400whp seems to be just right for the speed freak who still wants to be able to control his or her car. im at about 350 and i love it id rather be at 4.

 

Here She Is

 

That's a familiar lot! Did Dave or Brian tune it? Brian stopped by there today to get me a copy of my dyno sheet, you might have seen him.

What did it do!?

 

funny im about to gold foil my intake right now:-)

 

Looks good, Sounds good! minus the beep,beep. Is that the lot at Rotorsports?

 

It's Speed1 in PA.

 

I've heard the name but I'm not too familiar with them but the drool factor from the parking lot alone looks rather promising

 

Ya its Dave, not familiar with brian. usually that lot is packed with all kind of cars.

they haven't got around that far yet.

 

in a 2800lb car 400whp is too much.

if you can't roll into full boost in 3rd gear without spinning the tires, you have too much power.

 

That is ridiculous!

You can always roll back out as it starts to breakaway!

If it breaks the tires loose too fast for you to react rolling in to the throttle its because it wasn't making ENOUGH power as you were feeding in throttle to progressively break the tires loose.

That is my experience in 2,500lb FC. 380rwhp/300tq was "too much power" and 420rwhp/415tq was "could use more up top".

 

well, got the dyno result. 350rwhp @ 15psi. can wait to pick up my car.

 

About time! Post that dyno sheet!