LT1-LT4 Modifications 1993-97 Gen II Small Block V8

new track times .... again

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Old 09-18-2009, 09:18 PM
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Default new track times .... again

so i just posted that i went 12.81 at 108 babyed it the fisrt time and then i spun the second time and ran alomst the same time. but anyways i went out tonight left hard and hooked and ran a 12.67 at 108.4 with a 1.89 sixty foot. my mods again are pacesetter mid's, gutted cat , cat back , cold air intake,walbro 255 and a 75 shot and some dr's. i am still running stock converter and 2.72 gears.
Old 09-19-2009, 01:36 AM
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also a quick question my car for some reason is not wanting to shift into 3rd gear i mean it does it just will hit the rev limiter first then shift. just wanted to see what u guys thought about it. iam trying to post the video but it wont upload .
Old 09-19-2009, 01:40 AM
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not bad get some gears in that thang..lol
Old 09-19-2009, 02:31 PM
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What nitrous system do you have?
Old 09-19-2009, 03:15 PM
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What gear are you in when going down the 1/4 mile?
Old 09-19-2009, 05:03 PM
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i have a nitrous works plate kit. i am in third gear .it just when it shifts from 2nd to 3rd it hits the rev limiter in the video u can se my car backfire a lil bit when it happens. i talked to another guy about it and he said that his car does the same but im not sure about it.
Old 09-19-2009, 07:02 PM
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Originally Posted by nug416
i have a nitrous works plate kit. i am in third gear .it just when it shifts from 2nd to 3rd it hits the rev limiter in the video u can se my car backfire a lil bit when it happens. i talked to another guy about it and he said that his car does the same but im not sure about it.
Try over filling the trans by half a quart. Take off in 3rd like you have been, but once the trans shifts to 2nd put the trans in overdrive. This helps the 2-3 shift. I had the same problem with my car and this solved the issue for now. I don't expect the trans to last though, not with 500rwhp when it's on the bottle.
Old 09-19-2009, 07:11 PM
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lol defently dont think im makeing 500 rwhp .
Old 09-20-2009, 01:29 PM
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Originally Posted by Z-RATED94
Try over filling the trans by half a quart. Take off in 3rd like you have been, but once the trans shifts to 2nd put the trans in overdrive. This helps the 2-3 shift. I had the same problem with my car and this solved the issue for now. I don't expect the trans to last though, not with 500rwhp when it's on the bottle.
I've seen people say this before (maybe it was this same guy). I believe the reasoning behind it was that the trans uses different fluid circuits in OD, and doing this causes more pressure on the 3rd gear apply?

Like I said it's not an uncommon problem, for a 4L60 to bump the limiter on the 2-3 shift. Especially with a stall or anything that allows the motor to turn up faster (like a nitrous kit would). There is just more **** that has to happen in the transmission on that shift, so it will always take longer.

You can try lowering the commanded shift RPM, raising the trans pressure (electronically or mechanically), raising the limiter or all of the above. Either way you don't need to be hitting the limiter on the spray.
Old 09-20-2009, 05:05 PM
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Tune the car. When you hit the rev limiter your car is actually shutting the fuel off, not good on the spray. That and I wouldn't be so interested in slow *** Honda's and Toyota at the track and concentrate on your car.



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