It takes damn near forever and a Day for my RPM to drop back down from 4-4.5K with the clutch in, to 2K or so...
Is there a way to speed this drop for a quicker shift? (and not jumping the car)
When I took my res out, put my muffler on, and the K&N filter, I think it helped speed it up a little, so I was wondering if it's the backpressure that's causing this...
Or should I upgrade my valve springs? Basically, I want to be able to kick my throttle up to 4.5k and have it where it drops to idle in >1 sec...
Buddy Club Ecotec Cavalier
* More to come *
Lighten the parts that spin such as the flywheel and clutch.
Edited 1 time(s). Last edited Saturday, August 11, 2007 11:04 AM
What you are asking is not possible.
There are 2 reasons for the "hang".
1- too much rotational mass in the engine. Aluminum pulleys and flywheel will help a little but not much.
2- There is a setting in the PCM program called 'throttle follower'. It opens the IAC a certain # of steps that increases as RPM increases. HP Tuners did not decode this table for any of the J-cars, so there's no way for anyone to dial it back at this time. The throttle follower setting is causing 80% of the issue.
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protomec wrote:The throttle follower setting is causing 80% of the issue.
JW about this... if there could be any way of fabricating a strong spring to put in the throttle body... would that help at all, or would that be stupid and wouldn't work?
Buddy Club Ecotec Cavalier
* More to come *
Strong springs won't help. Throttle follower causes IAC to open which bypasses the throttle plate. Having IAC open at WOT is good. Having IAC stay open after throttle closes is not so good.
-->Slow
lol turn the key off.
Lighter internals and rotating parts, as stated, but its not going to be as fast as you probably want it to be. And for the amount of money it would cost to replace all those parts JUST for a faster Rev drop, its more worth it to save on gas and ease up on the free-revving. (if thats what youre doing)
i had that happen to me last year where the rpms would hang or jump up ir idl over 2000rpm turned out that my computer was bad and needed replacing
THERE CAN BE ONLY ONE, i have already died once and im still here so lets just leave it on the track
yea, what your asking for is why supercars cost 130k....the J-body was not build for throttle respose. you can speed it up as previously stated, but its not going to be as fast as you want it to be
NEVER going to drop that fast.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
