Low Power between 1500-3500 RPM
I have a 90 LX that has low power response from 1500 to 3500 RPMs at WOT. 3500 on up she runs like a bat out of hell. The engine was freshened up 10,000 miles ago with new bearings, E303 cam,mild porting on the E7TE's, Typhoon intake ( Gasket matched),BBK 70 mm TB & Spacer, 73mm C&L mass air calibrated to the 19lb injectors, 160 degree T-stat, MAC Cold air induction kit, BBK adj. fuel reg set to 37psi, new MSD Blaster Coil, Mac 2.5" off-raod h-pipe, 2 chamber Flowmaster, stock headers, and 3.73 gears loaded into the rear. She has an AOD and runs great getting nearly 19 mpg as a daily driver but the power loss at the low end is driving me nuts...the spark plugs are clean and not showing any unusual burn patterns. I have not done any computer upgrades as of yet as I am unsure of what my best route to take on the chips as I still want to change heads and add a supercharger. Any ideas on how to straighten this out would be appreciated.
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stock torque converter? if so then that why you have poor low end responce. all you mods moved your powerband up but the converter can't stall high enough now.
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I did upgrade the torque convertor......I thought all of my components should have kept my power band in the 1500 to 5500 range though. I do have my timing at 15 degrees currently too. I could be wrong though
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To me it sounds like the Cam was not installed straight up with the pistons and crank. For the heck of it turn your timing up by ear or go up another 4 degrees and see if it gets better just don't floor it because you might detonate if the cam is installed correctly.
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The E cam and Thyphoon won't make power until then - I don't know if your sig is a typo, but 1,400 rpm stall is not near enough - neither is 2,400 IMHO. 2,800-3,000 is what you really need. Been there & done that.
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stall
Quote:
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Yes I did mistype my stall for my tranny....it is an 1800 stall. Guess I'll upgrade it as soon as I can scrape up some extra cash. Thanks for all the help guys!!
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Re: Low Power between 1500-3500 RPM
When I had an AOD, I had the EXACT same motor except for a Hartman bread box intake and I used a 2400 stall from GER Performance transmissions and it worked great..Made a big difference in take off but kept the good MPG. No sh*t on the motor though, I had the exact same...gears and all!!! Best time I could post was a 9.18 in the 1/8th but I thought that was respectable for a 3640lb car with me in it!!
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Re: Low Power between 1500-3500 RPM
Where are you looking to find posts to comment on from 2003? ;)
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Re: Low Power between 1500-3500 RPM
USMC302,
holy sh*t!! I didn't even notice and to be honest, I work midnights and just got up so I got no idea how I found it!!! I'm glad somebody's awake!!! |
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