I had my cat uned this weekend after putting my 2.5 pulley on and my phenolic manifold spacer. Iat2 on a 2.7 used to be 115 and wot at 7000 used to be 130 and this is on a 85 degree day. Now on the 2.5 and phenolic cruising iat2 is about 106 and wot at 7000 is 113-116 on a 85-90 degree day. Car runs afr of about 11.7 and timing was 21 degrees and I only run a 3gph nozzle with 50/50 mix. Not sure what max boost was because the graph flat lined at about 22 psi at 5500 rpms and the stock boost gauge went to about were the autometer logo is and then at 5500rpms shot backwards to 0psi and held there till 7000rpms. So I guess I maxed the map sensor and gauge out or something. Idc hit 100% at 6950 with my fuel regulator set at 43 psi base, and I use 60lb Injectors. Supposed to go on the Dyno tomorrow to see what it can, with my luck it won't make **** but we'll see how it goes.

 

cool

 

Any dyno results yet?

 

Yea the car made 295whp at 5000 rpms and then it fell on its face and dropped to 250 whp at 7000 rpms. My tuner was sick so he didn't make it to the Dyno so I don't know why the power dropped off so suddenly. The graph got real choppy after 5000 rpms so any ideas on what might have happened are welcome. I'm gonna try tunning it on the Dyno so we can see what works and what doesn't work.

 

clutch. timing retard. **** tune. ect. if ure tuner wants help ask him to pm me or some other tunee here and id be glad to help

oh yeah a **** dyno also.

 

The clutch slips real bad at the track but only a little from a roll on the street. I drove the car on the Dyno and it didn't seem to be slipping but I could be wrong. I don't think my tuner is on this forum.

 

well if u want help i can help with ure tuning.

 

Change that to a 10 and watch your idc go down.

 

I bought a 5gph to replace the 3gph but apparently they changed the size of the nozzles and there to big to fit in my supercharger spacer. And I lost the 5gph and 7gph ones that came with the kit I bought from snow performance back in 2007. How would you be able to help with my tune if I live in florida?

 

LOL you can email me your tune and your logs.. ( first i would start by looking at your tune and making sure its within my specs for what your mods are) And i would email this file to you then we can dial it in...!!

 

^^ go with this guy he def knows how to tune and will help you with any questions and problems!

 

3gph 50/50 on a tvs w/ a 2.5 is no where near enough nozzle. Over here on 91 octane we use that nozzle for a 3" m62 setup.

two things are most likely happening

Your 60s are static leaning you out substantially
your knocking like a **** due to the lean and lack of octane.

toss a 10gph on it, and have your tuner keep the midrange in the 13-18* range, then begin scaling upwards 1/2 a degree until desired advance is met by redline.

On the tvs with a ported head and 2.6 pulley, 91 octane and a 17gph 50/50 injection was necessary to play the aggressive timing game like the e-85 guys. Prior I did make a table similar to how i described above, the 14gph was sufficient.

By keeping timing less aggressive @ peak torque/cyl pressure, the less nozzle you'll need. Peak cyl pressure is not @ redline... look @ your dyno graph and see where your peak torque is and how long is carries, use that as your guide to sculpt your timing table.

example: Being that your on a stock head and 2.5 tvs pulley.. you'll most likely hit peak torque @ 4000 rpm.
From 3000 to 5100 rpm a safe scale would be 12-17 (keep it smooth)
from 5100-7200 rpm, scale timing to desired advance by redline using 1/2 increments or 1, just keep it smooth.

I'm surprised your tuner didn't raise an eyebrow when your IDC is hitting 100% by redline. On a dyno, AFRs tend to richen up .4-.6 AFR because the car isn't moving, that would cause idcs to be higher than normal too.

 

i dont know if anyone noticed but hes running 60s with a 2.5 on a tvs and meth lol sounds like hes maxing them out lol

 

changing to 80s is cheap, thats an easy start. then snow sells nozzles on their site for short money, buy a bigger one. all the parts would be here this time next week if you ordered them today.

 

just picked up some 80s on css.net for 100 shipped.

 

Im running 60s on a 2.6 and my idc are 76% on a 17gph 50/50 mix. He's problem is his nozzle is way to small. If he starts with a 10gph nozzle that should put him in the upper 80's.

 

damn i thought the tvs would need 80s under a 2.8..oh well atleast i can use e85 since i got the 80s =D

 

yea you can use 80s but you will still run out of fuel on a 2.8

 

Well it seems like I have to figure out a way to run the new style nozzles in my supercharger spacer. I guess I'll have to drill the hole out and retap it for the larger diameter of the new nozzles. I thought I would be fine as long as I kept the heat down but I guess not

 

lol ive tune tvs with 80s and idcs were under 75%-85% from a 2.5-2.7 pulley..... just alot of meth

 

I'm running a 2.5 ring, 60# and 10gph idc's don't go above 85%.