***Why am I so slow? Times Inside***
Thread Starter
Evolving Member
iTrader: (14)
Joined: Feb 2007
Posts: 313
Likes: 0
From: Skiatook, OK
Yeah I added 3 gallons of 110 to 6 gallons of 91 for a few runs last week...turned the boost up to 24psi, no knock, but know additional power gains. Sounds like I may have a HUGE boost leak...building a tester tonight and we'll see.
Doing this same thing, I see .3s/3mph gains usually.
Whoaaaaa, say what??? Boost doesn't tend to taper at 7600...it begins to taper closer to 4600 and horsepower peaks closer to 6600. By 7600, you're completely out of breath, and it's not much better at 7400. Shifting at 7400 on a stock turbo'd IX with stock cams is not a good idea. He should shift at 7000. Also, why say "better faster shifting"? This guy was driving very well - his shifting is the LEAST of his problems. His PROBLEM is that he's only trapping 102-104. That is the ONLY problem. His 60' can improve, which will improve his ET some, but it's not going to suddenly make his car fast. His setup should be trapping a lot more than 107, too.
LIL EVOL, yes, heat is a big factor, but I think there's much more at play than heat. My example is that I ran a 12.000 @ 113+ in 60* weather, and on the same setup, I ran 4 straight 12.1s @ 111.5 in 95* weather with 100% humidity. So yes, heat made a difference, but not that drastic.
LIL EVOL, yes, heat is a big factor, but I think there's much more at play than heat. My example is that I ran a 12.000 @ 113+ in 60* weather, and on the same setup, I ran 4 straight 12.1s @ 111.5 in 95* weather with 100% humidity. So yes, heat made a difference, but not that drastic.
I never said boost beggins to tapper at 7600 i said it tends to as in you wil have 17-16.5 psi left witch is nothing. as for shifting at 7k boost is still down from what it spike's and shifting at 7k doesnt leave a heck of alot of power band at times depending on mods. i ran 11.9 on 27 psi on a 98 degree afternoon with a mph of 114+ shifting at 7400 i have tried shifting at 7k and lost 1 mph down to 113. with faster shifting his mph will also increase we have seen stock evo9s run 12.8 with out a tune and the boost set at 24 trapping 107 and at least 85 mph in the 1/8th mile.
My logs show if I shift @7k it falls back to 5.5K ish, pretty much where MY stock turbo makes the most HP .
EDIT rechecked some logs and the rpm goes drops 7k to 5.2k on upshifts
Last edited by matt55; Aug 6, 2007 at 12:23 PM.
Evolved Member
iTrader: (37)
Joined: Sep 2003
Posts: 3,146
Likes: 2
From: Spec-Ops Motorsports, Fayetteville, NC
looks to me like your car falls on its face after the 1/8th. Considering your 60ft, to the 8th you are running a mid 12 if i had to guess. When my car was sitting like yours, id shift at 63 or 64 and ride out 4th to the rev limiter. i had those same tires on my 11.8 run, they do suck lol. Good luck man
It seems more like his problem is still before the 1/8mile mark, his 1/8 mile time matches with his 1/4 time. Like warrtalon stated, this rules out the possibility of him not shifting fast enough. My best guess judging from the info. he has stated, is to get tuned on the dyno and see what's really going on. His numbers might reveal something. Good luck lil evol.
I never said boost beggins to tapper at 7600 i said it tends to as in you wil have 17-16.5 psi left witch is nothing. as for shifting at 7k boost is still down from what it spike's and shifting at 7k doesnt leave a heck of alot of power band at times depending on mods. i ran 11.9 on 27 psi on a 98 degree afternoon with a mph of 114+ shifting at 7400 i have tried shifting at 7k and lost 1 mph down to 113. with faster shifting his mph will also increase we have seen stock evo9s run 12.8 with out a tune and the boost set at 24 trapping 107 and at least 85 mph in the 1/8th mile.
Boost begins to taper on a stock turbo almost immediately after it spikes.
"I never said boost beggins to tapper at 7600 i said it tends to as in you wil have 17-16.5 psi left witch is nothing."
WHAT?!
It tends to as in you wil have 17 psi left witch is nothing? Engrish plz?LILEVO there are a number of factors which could cause your poor times.
Bad tuning significantly reducing your power even with mods. Boost Leak. The intense heat and humidity. The track (may be a slow one), etc... Don't be discouraged, your on crappy gas and stockish boost.
Thread Starter
Evolving Member
iTrader: (14)
Joined: Feb 2007
Posts: 313
Likes: 0
From: Skiatook, OK
All in good fun...I believe it has alot to do with them...a supercharged GTO with nearly 500hp could only muster 12.5s all-day with good 60fts and drag radials. Having had a GTO before this that's slow...should be in 11s. In fact most other cars couldn't break out of the 14s. Car feels strong, but I agree...need to hit the dyno.
It also seems that there may be a little bit of air leaking from my stock DV...and I have quite a bit of flutter hear and there. I know some is normal...but seems to occur more frequently. Reccomendations? Forge? APS Dual Vent? or neither? IS the Greddy SP Catback restrictive?
It also seems that there may be a little bit of air leaking from my stock DV...and I have quite a bit of flutter hear and there. I know some is normal...but seems to occur more frequently. Reccomendations? Forge? APS Dual Vent? or neither? IS the Greddy SP Catback restrictive?
Last edited by LIL EVOL; Aug 7, 2007 at 06:33 AM.