need help tuning

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Aug 15, 2003 | 02:53 PM

bigblackSS

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From: Charleston, SC

need help tuning

i just installed my tr 224 cam so i am beginning the long process of programming the computer. i have adjusted the MAF table by 110% i(10%) in order to compensate for the ported MAF(i know that it is harder to use a ported MAF but its all i have) and reduced the IFR by 95%(which corresponds to a 5 % difference). Now my LTFT's are much closer to the desired values during normal cruising. At WOT, i have about 4* of KR, my timinig is only 17*-18* and for some reason one of my LTFT is 0 while the other is at 25. this seems a bit weird to me. if anyone out there can help me i would greatly appreciate it.

also how should i adjust the the timing. i know u need to go to the high octane spark table, but what do i do from there(adjust columns or whole table by percentage or certain values.

if anyone out there has similar mods to mine and wouldn't mind sending me a copy of their ls1 edit file, that would be a great reference in my quest for a finely tuned automobile.

if my approach is off. any advice would be a great help

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1998 Camaro SS[list][*]air lid+K&N filter[*]ported MAF[*]shaner 2 throttle body[*]hooker coated headers+ y-pipe[*]ls6 intake[*]tr224 114lsa[*]2002 chrome Z06 rims[*]Yank ST 3500

Aug 16, 2003 | 03:19 AM

NoGo

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From: Mass

Re: need help tuning

2 problems. 4 deg KR, and 25% LTems on one bank.

You need to address the 25% LTerms. Try checking for a vacuum leak by spraying some propane around your intake. Try to get in the back.
Other things to look for are an exhaust leak, bad O2 sensor.

98's suffer from a knock problem. Most likely it is false KR (unless you can hear pinging). Run a search on 98's and KR and you will get plenty of solutions for this problem.

Aug 18, 2003 | 07:58 AM

bigblackSS

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From: Charleston, SC

Re: need help tuning

any more help. i got my LTFT down to negative numbers and 0 at wot. the knock is for the most part gone. my 02 sensors are around 920 at wot which is a little rich. my timing is about 20*. with all this the best that i could run in the 1/8th last night was 8.33. i was running this time before i put the cam in the car. the car feels stronger to me, but is sure isn't showing any improvement at the track. somebody please offer some advice.

Aug 18, 2003 | 08:24 AM

XtreemeChaos

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From: Columbus, OH

Re: need help tuning

I'm kind of in the same boat as you. I installed a 224/227 cam and am doing my own tuning. Before the cam I was running 13.2 and after a 13.03. Is the Charleston in your Location WV or SC? If its WV, I grew up in Winfield and drive through Charleston about once every month or two.

Aug 18, 2003 | 10:14 AM

Slowhawk

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From: Bridgewater,Ma

Re: need help tuning

There has been many posts of 98's having bad knock sensors.Look into that.I would not recommend the 110% of the whole MAF table.Up to around 8000htz is ok but not the whole table.
Your timing should be 28-30 above 5200rpm.(the 20 degree's is killing your setup)

Aug 18, 2003 | 10:42 AM

bigblackSS

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From: Charleston, SC

Re: need help tuning

Charleston SC

i know my timing is low, but how should i change it. i went in and up the values and my timing is still 17-18. i must be doing something wrong.