Performance Problem

[fullboar]

I have an LT5 and appropriate 6spd. trans in a '56 Chevy. The engine has always ran below expectations for a 400+ hp motor. I'd like to eliminate the vaccum secondary butterfly system all together and run on all 16 injectors all the time. I'm convinced this system is inoperable on my motor. Can someone coach me through what's entailed and direct me to someone who can reconfigure the computer or send me to someone qualified to do this work around Houston,TX ??? Thanks.

[rhipsher]

This is the best link for fixing the secondary problems. http://www.corvetteactioncenter.com/...diagnosis.html Of course if you still want to totally remove it you still can. Mine wasnt working either when I bought it 5 years ago. It was the secondary vacume solenoid. A $36 part. Then it went from unimpressive to scary warp speed.

[tccrab]

Originally Posted by fullboar

I have an LT5 and appropriate 6spd. trans in a '56 Chevy. The engine has always ran below expectations for a 400+ hp motor. I'd like to eliminate the vaccum secondary butterfly system all together and run on all 16 injectors all the time. I'm convinced this system is inoperable on my motor. Can someone coach me through what's entailed and direct me to someone who can reconfigure the computer or send me to someone qualified to do this work around Houston,TX ??? Thanks.

We MUST see pictures of your very cool car!!!!

Contact Marc Haibec, the "ZR1 Specialist" for the necessary updated prom and advice on how to remove secondaries.
http://zr1specialist.com

TomC
'Crabs

[gbrtng]

http://www.hendersonperformance.com/hpt_contact.html is in New Braunfels and Corey knows LT5s. Highly recommended.

[Kevin]

Originally Posted by gbrtng

http://www.hendersonperformance.com/hpt_contact.html is in New Braunfels and Corey knows LT5s. Highly recommended.

one of the very very few people i'd trust with my car

[FU]

That makes 3 of us. Go on and talk with Corey , he'll do it right.

[Tyler Townsley]

There is an ecm software change that turns both sets of injectors on and secondarys held open. Cory has it and can do the necessary fuel recalibration. He has done the sec removal on several cars including mine. Check with him on what you want to do, it may save some time and money. Marc H is also familiar with the procedures. Credit should be given to Tod P for the software changes. It may also be your ecm is not getting a necessary flag that allows the calibration to enable the secondaries, again Cory has the necessary engine monitor software to make sure the calibration is correct.

Tyler

[XfireZ51]

Originally Posted by fullboar

I have an LT5 and appropriate 6spd. trans in a '56 Chevy. The engine has always ran below expectations for a 400+ hp motor. I'd like to eliminate the vaccum secondary butterfly system all together and run on all 16 injectors all the time. I'm convinced this system is inoperable on my motor. Can someone coach me through what's entailed and direct me to someone who can reconfigure the computer or send me to someone qualified to do this work around Houston,TX ??? Thanks.

Why do you think eliminating the secondaries is the fix?. Do you get any codes, does the car feel like its stumbling when in WOT? Getting a scan would be a good first step.

[fullboar]

Thanks for all the helpful suggestions. I'm going to try and get in touch w/ Cory and let him diagnose my problem. Pretty sure the secondarys are the problem because the car runs like it has 250 HP. Just doesn't have any spunk. Lingenfelter went through this motor when I first got it and he said it made 505 HP on his dyno. I knew John personally and that was before he passed away. Go to http://www.facebook.com/media/set/fb...3&l+5ac4448de8 to see some pics of my car. Thanks again guys. Sorry guys, that link won't work. I'm trying to think of another way to get the pics up but nothing yet.

[LGAFF]

you can peek between the runner with a flashlight to see if they are opening