I was wondering how far 93oct could carry a high horse power 7, and when do you need to start thinking about race gas?

 

I've heard above 15-16psi

 

I run 19-20 psi on 93.

 

what turbo are you runnig and whats whp?

 

I say just over 1 bar especially on larger turbocharger setups. Pump gas becomes too risky at that point and, in my opinion, just isn't worth using past that 1 bar mark.

B

 

what about with a hks t04r say at 15-18psi?

 

So with a T51r KAI with water inj, I should be able to use pump gas(93) until 20psi or so? Sounds good to me. (project way down the road)

 

I run a HKS T51R KAI.

 

You have to take alot into consideration. Air\fuel ratio, timing, plug temp range, even
air temps. I suspect a larger turbo might heat up air less than a harder working smaller
turbo. All in all you are pushing your luck above 14-15psi if you are'nt set up for it. I
know guys that popped it at 12psi and others that run 18-20psi 'cause they set the
car up for it- rich fuel, huge i/c, cold plugs etc. I would get with a good rotary tuner
and do what he says. Good luck.

 

Gargamel, what port are you running? IC? Aprox whp? I want to run a stage4 from Gotham. Just getting a feel for what will be nessasary...

 

Greddy 3 row, medium sized street port. Not much hp

 

Not much? I call BS.

 

Me personally, I would not run anything more than 14 psi on my car with 92/93 octane gas. While you can setup a car to optimize lower octane by adjusting values, there is still too many things that could potentially go wrong. This is just a simple worry thing for me.

My car is tuned to run 14 psi on 93 gas. But, I will premix a higher octane for safety purposes. Use PSI in determining the gas octane, not the rwhp. I made 630 on 93 octane.

 

Too many variables here. Basicly, all the cautious guys are warning you that all but the best planned combos can pop above ~15psi on 93. That said, cooler plugs, water injection, larger turbos, larger ICs, a good CAI, retarded ignition(to a point), will all allow you to push that number. I always run 100, low boost, high boost, street, track, etc. I have never blown a motor since. That, I think speaks for itself. I run ~10.5:1 conservative timing, a relatively narrow split, NGK 6725-11.5 plugs, a large FMIC, and a good CAI. I can boost 28 psi on 100(most would, and should use C16 @ that boost) all day long with that combo on a small TO4S(more heat). It's cheap insurance bottom line... Carl

 

630whp? on a 2 rotor? with 93oct. at what boost level? what do you have done???

 

3 rotor.

 

what about those guy running bnr twins that claim 400rwhp? do most of them run pump gas? I was thinking because the turbos were so small (less cfm) they might be able to get away with pump gas

 

There is no 'claiming' it has been done. It has been done. Yes, 93 octane. And who says they are so small? You have a very limited knowledge of them (I have taken mine apart) and there are 2 of them, which kinda makes a difference.

In all your ridiculous threads you are looking for some silver bullet or magic fairy dust.

1 bar is about the limit for long-term reliability on pump gas. If you want to run more, get water injection. If you don't follow the advice given to you by like 10 experienced people already, then you will learn the hard way, by turning your 13b into a popcorn machine. Some of us have been there, done that already.

 

But he'll have the 2JZ FD to drive while this one is making corn

It is time to do some deep thoughts on all your posts Jr. You are alienating yourself quickly. Just some friendly advice before the dogs are unleashed on you.The dogs on this board can be Rabid. tread carefully.

 

I see you have the bnrs and from what you have said you seem to like them alot! have you ever been in a single turbo rx7 if so how did it compare? and have you ever been to the track if so what is you best time?

 

No dragging yet. I am pretty sure I have already posted all of this, man. One more time:

(keep in mind this is all on the old BNRs)
40 to 140mph 14.0 seconds.
against a GT35R FD, ran even from a stop til the end of 3rd gear (100 mph) then he slowly started to pull. This was both of us at ~17ish psi.

 

how do the old ones compare to the newer ones?

 

this has already been posted numerous times. Do a search under my username and 'BNRs' and you shall uncover a wealth of stupendous information

 

He has a beast under the hood (20B with a turbo large enough to eat small children).

 

I run no more than 14 psi on 93 octane, but then I don't like paying several thousand dollars for a rebuild.