Thread: Tuning, Psi, RPM, spark plug gap, belt slip ect. ect...

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  1. #1 Tuning, Psi, RPM, spark plug gap, belt slip ect. ect... 
    SE Level Member Boosted02GTP's Avatar
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    Alright I have some basic questions. I got the car tuned for a basic 3.4 set-up..It's a mail-order tune and the shift point have been changed ect. 1st goes to around ~55 2nd ~95..seems a little high for a stock head/top end car..no?? It's defiantly over 6,000 RPM seems like its shifting around 6,300 maybe?? Not sure how off my needle is..

    I went to the track on Saturday to see how the car would run, was hoping for 13's on my new snow tires . Well my first run was a total bust..it ran slower than it did stock, 14.9 to be exact. The car spun all of 1st and short shifted into 2nd. On my 2nd pass I pulled the headlight and didn't go WOT until about 15mph out. The a car ran much better for cracking a weak 2.3 60'...but I'm still really disappointed with the shift points. It felt like I was shifting into 3rd going through the traps which I felt really hurt my times. Also 3rd gear sucks lol. Wouldn't the car run faster shifting lower?? From the dyno's Ive seen these drop a lot of power after 5K. I bought this mail in tune and I'm afraid it may be locked if I buy some tuning software...thoughts??

    Also another thing is spark plug gap and belt slip. I have a 3.4" set-up with the recommended belt and the TR6 plugs at ~.45" . I was seeing a solid 10psi at WOT creeping to 12psi Friday night, and the car felt AMAZING. The day I went to the track I cleaned up my engine bay and may have gotten some oil on the sc belt..? When I ran at the track I was only seeing 7psi at WOT..tonight I'm seeing 9psi..Whats with this? My cheapo boost gauge, weather, or belt slip?? Maybe the oil is wearing off, it feels better than it did when I ran at the track but still not as good as Friday night @ 10psi..

    Some things that have me worried..the gap not being right, shifting too high, and why the PSI is so weird..Don't get me wrong, it runs good. But I think with some tweaking it could be better..Any input would be AMAZING!





    Last edited by Boosted02GTP; 10-31-2010 at 10:11 PM.
    2002 GTP coup 14.6 @ 94mph stock baseline 5-7psi.
    Headers w/o cat, plugs, fwi, 180* t-stat, 3.4, mail-in tune. 13.9 @ 99.75mph 2.2 60'..seeing only 7psi and a fresh set of weatherman snow tires
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