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Topic: Tuning the Crossfire engine

in Forum: C3 Engines


Tuning the Crossfire engine

Posted: 2/26/07 4:13pm Message 1 of 10
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Shenandoah, PA - USA
Joined: 10/18/2006
Posts: 328
Vette(s): 1982 Chevrolet Corvette
Any '82 (or '84) owners have success with some of the performance chips they offer for the Crossfire engine?  When I purchased my car from the second owner he told me he believed that the cam had been swapped out, also the car seems to run very rich, and I'd like to have these things tuned for.  Looking for some additonal info / suggestions / experience.  


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Tuning the Crossfire engine

Posted: 2/26/07 4:22pm Message 2 of 10
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Savannah, GA - USA
Joined: 1/20/2005
Posts: 936
Vette(s): 1982CE,32,000 and counting. (fast!!) 1981 Vette, black on black. ZZ4 (quick!!)
There is a co.That makes a chip for these.I forgot and want to get one for my 82,so I'll just look in after awhile and see.I'm not sure changing a cam would do much good on these engines and might be a detrement if you don't change out the heads, and I'm not sure what heads would work good on the CF setup.My 82 is a CE so I don't want to do much to it thats the reason why I'm just as interested as you are on this.


Tuning the Crossfire engine

Posted: 2/26/07 5:37pm Message 3 of 10
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Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Stephen,  The link below will take you to the crossfire injection vault.  These folks eat, breathe, and sleep crossfire injection.  They can answer any questions you have regarding tuning your crossfire from mild to wild.  http://www.crossfire.homeip.net/   Click on the "register" link when you get to this page, the site is free and is loaded with crossfire information.  You may want to contact Phill's Vette, a member of the C3vr forum, he has had work done by some of the guys at the crossfire injection forum and swears by them.  Zgator is right about the cam perhaps being counter productive unless other mods are done as well.  As for the performance chip, I have no experience there but have been curious about them.  The chips are only beneficial at wide open throttle according to the advertisements.  Let us other crossfire owners know what you find out and how you solve your problem.  Good luckThumbs%20Up


Tuning the Crossfire engine

Posted: 2/26/07 8:37pm Message 4 of 10
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Shenandoah, PA - USA
Joined: 10/18/2006
Posts: 328
Vette(s): 1982 Chevrolet Corvette
I am a member of the "Vault" but I don't there post much... mainly because the ECM/BIN tech there is just way over my head  Embarrassed  What I have gleaned so far is that many performance-oriented CrossFire owners have chosen to swap ECMs to those from more "tuner friendly" TBI models.  Not really something I want to get involved in with this car.  Basically I would just be satisfied if carbon soot would stop blowing out of my tailpipes and I could stand next to the car without being brought to tears by the exhaust fumes.


Tuning the Crossfire engine

Posted: 2/27/07 9:24am Message 5 of 10
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WEST SENECA, NY - USA
Joined: 12/3/2001
Posts: 2379
Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.
Try sending an email to these folks: www.x-ram.com they may have some tech help to offer.
 
Darryl812007-02-27 09:25:00



GEN III 5.7L "LS6" Engine swap
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Tuning the Crossfire engine

Posted: 2/27/07 9:59am Message 6 of 10
Former Member
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Savannah, GA - USA
Joined: 1/20/2005
Posts: 936
Vette(s): 1982CE,32,000 and counting. (fast!!) 1981 Vette, black on black. ZZ4 (quick!!)
Man I know what you mean.I had a 70 Z/28 that would bring you to tears before I swapped out carbs.


Tuning the Crossfire engine

Posted: 2/27/07 10:12am Message 7 of 10
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Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Stephan, I tried to send you a PM but got an error.  I know what you mean about not wanting to swap out your ECM and yep, lots of the stuff at the crossfire vault is way over my head too but they may be able to give you some idea of what may be the problem.  Ive seen some good advise in the forum that was conservative and logical without all the reprogramming and swapping of ECMs and other voodoo stuff.  Phill's vette may be able to give you some help as well if he reads this post, perhaps he can respond to you about your problem.  I know he is very happy with his crossfire now.


Tuning the Crossfire engine

Posted: 2/27/07 10:22am Message 8 of 10
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Victor, NY - USA
Joined: 7/12/2004
Posts: 6841
Vette(s): 2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe
A guy at Carlisle had an '82 and said he put the Hypertech Chip in his and it helped the "hunting" of the transmission when city driving.
I bought one from Mid-America and installed it last year.
It says you have to burn hi-test when you have the chip in it. I was usually using 89 octane because I would get pinging under load when using 87.
So i use 91 octane now, or 93 if available.
No ping, no hunting.
Slightly better gas milage.
I guess it was worth it, but it is costing me at every fill-up.Cry
 
Also, I have the repair records from a previous owner. My cam was replaced at around 65K miles. I recall GM had some soft cams back then. Maybe that is why your cam was replaced.
 
The site that Sarge referenced looks interesting.
Anyone installed any of their products?



 
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Tuning the Crossfire engine

Posted: 2/27/07 12:56pm Message 9 of 10
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Shenandoah, PA - USA
Joined: 10/18/2006
Posts: 328
Vette(s): 1982 Chevrolet Corvette
I appreciate all of the help! 
Don't know what happened to the PM function Chip  Ermm 
I think I addressed a lot of the basic tech stuff already: new exhaust/converter with no apparent leaks, O2 sensor seems to be working properly, EGR seems to be working properly, new plugs, etc.  I always use Sunoco 93 octane in my cars.  I wish I knew a little more about the camshaft story.
A smoother transmisson would definitely be an added bonus.  I'd chalked up that "hunting" to a poor gear ratio.
My only frame of reference here is my LS1 Camaro -- throw it on the dyno, hook it up to a laptop, instant tuning  Smile  I only wish it were that simple for this car! 
  



Tuning the Crossfire engine

Posted: 2/27/07 2:38pm Message 10 of 10
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Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
Dave,  Thanks for your info about the transmission hunting.  If the hypertech chip will help in that respect, it may be worth the investment.  I already burn premium gas so that wouldnt add any cost for me.....they sure are proud of that "high test" gas though Cry


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