Drag Rb25Det, Fuel ?

[BloodBath]

with E85 I think I would have to change my injectors Ive already seen them at 93% duty. lol Ive heard you have to change fuel lines too.

[boostn0199]

Fuel lines is still a myth, many ppl runnong ethanol inc myself on std lines no problems.

[R31Nismoid]

Your going to need a fair bit more power to run consistant mid 12's from a 13... Id spend some time taking weight out of the thing first. Then a ethanol tune.

Or nitrous.

Agreed to an extend only given his current time of 13.30 @ 107 & 2.0 60ft is quite decent, so the OP can certainly pilot well enough.

If he can get the 60ft down to 1.7 with the ET Streets then he is looking at a 12.8 up the other end (or there abouts)

Get the 60ft down to 1.6 and then it'll be pretty close to 12.6-12.7

Not quite a 12.5 but it's not gonna be far off that marker.

[Rolls]

If you want to run a better fuel run it on alcohol, is E85 or some other ethanol blend available where you are? Would be much cheaper than 116 and also legal to use on the street.

Edited August 16, 2011 by Rolls

[GTScotT]

Guys dont forget a 90' 240 is an S13.

A little power to weight to help out, unless this has already been considered.

[BloodBath]

Does anyone know the answer though, as far as to how much timing I can add at wide open throttle??

[ARTZ]

...hey, the guy I bought my skyline off said he run a 12.8 in stock trim and everyone told me it wasnt possible

[Lithium]

Does anyone know the answer though, as far as to how much timing I can add at wide open throttle??

If only we could tell what timing we could put into setup changes without looking at a car... "more" is usually the answer, but really it needs to be tuned to suit to find out the amount. Possibly none at some points, and possibly several degrees at other points

[STATUS]

What sare some of the fastest stock turbo RB25's that you all have seen out there??

How much timing can I add at full boost when going from 91 oct to vp 116???

I'm shooting for a mid 12 on 12 psi, stock turbo.

10.61 @ calder std engine.

[Lithium]

^ on an unmodified stock turbo?!

[Rolls]

^ on an unmodified stock turbo?!

If it weighed 800kg maybe lol

[Beer Baron]

E85 could work quite well, fyi 98RON we get in NZ and Oz is equivalent to 89MON

yeah maybe, but US fuel is not MON either. it's an average of MON and RON so their 91 is still not quite as good as our 98 but not as far off as most people think.

[Beer Baron]

MON is tested under load. Someone do correct me if I'm wrong.

yeah kind of wrong. both RON and MON are a measurements of the fuels ability to resist knock on a test engine. MON is tested at a higher RPM that RON which makes it a bit more relevant in most peoples eyes (we are still talking very low rpm, like under 2,000). both tests run the fuel in a special test engine with variable compression till it knocks but the mon test is at higher rpm, with heated fuel and the also advance the ign timing. RON (and MON for that matter) is out of 100 as compared to the control 'octane'. however since some additives in fuel have better knock resistance than the control (iso-octane) you can get a number higher than 100.

US 91 AKI fuel is about 95 RON. our 98RON is about 94 AKI but there is no direct correlation between RON and MON. some substances will be as much as 20 or 30 points higher in RON vs MON, some will be only a few points apart and some (like the control octane) are actually equal in RON and MON.

if you want more info i'm sure there would be some fuel info site or even wiki or howstuffworks etc on this.

[R31Nismoid]

^ on an unmodified stock turbo?!

Was a ATP custom turbo, auto... was like 6 years ago now too.

Car was OBEHAVE or OBEHVE or something like that. R33 gts-t

[R31Nismoid]

yeah kind of wrong. both RON and MON are a measurements of the fuels ability to resist knock on a test engine. MON is tested at a higher RPM that RON which makes it a bit more relevant in most peoples eyes (we are still talking very low rpm, like under 2,000).

if you want more info i'm sure there would be some fuel info site or even wiki or howstuffworks etc on this.

Yeah Wiki says 900rpm for MON and 600rpm for RON. Pretty low indeed.

Link for the lazy: http://en.wikipedia.org/wiki/Octane_rating

Some interesting reading, and will just lead to more google action if you wanted to know even more.

[BloodBath]

I got my car back to the track. I managed a 12.90 @107. My best 60' was still only a 1.85, but I was also scared to just dump the clutch. Here is a link to my video.

[KiwiRS4T]

You are doing very well for the power level you have. The answer to your original question is to be found only on a dyno if you want to keep your engine in one piece. Your next mod should be an aftermarket computer - Link or Motec or whatever you can get tuned where you are.

[BloodBath]

I have an AEM standalone EMS and have done all of my own tuning thus far. The turbo shopping research has begun.

[old mate]

no burnout?