How well would a crossfire injection setup work on daily driver 350, that would never see the high side of 5500 rpm?
I just purchased an 82 Z and was just going to toss the 305, and build a 350.

 

I had a 350 crossfire vette. It was pretty quick. Stock it ran a 14.5, with some head porting, intake porting, cam and headers it ran a 14 flat. Many crossfire vette owners have there cars in the 13's and some more radical setups in the 12's.

 

Its actually pretty nice on a 350. My uncle's Corvette has a CFI 350 ('84). Beleive it or not, CFI is partly the reason for TPI being designed the way it was - they wanted something that would be as torquey as the CFI 350 in the Corvettes were.

Basically, its a VERY torquey setup, and is a really smooth running system too, but don't expect much on the high side of 4000rpm.

Its a good setup for a daily driver for sure, and its not 'work' to drive it, because it just runs really nice and smooth. Its definitelty no fire-breather though.

 

So if I use a set of 601 heads on this 350, with compression around 9.4 I should be okay?
The 305 HO heads are awesome to 4500-5000 rpm, if ported right.
Thanks guys.

 

Those heads should be pretty good for your setup.

 

If you really want to keep the CFI, you might consider some upgrades to make it more useable.

There's a procedure somewhere on the Internet about repinning the harness to take a '747 ECM. This one is the same as most later TBI trucks use, much faster processing and more tuneable than the old '82 piece.

You'll also want 350-size injectors, should be same pieces the '84 Vette used.

Good luck!

 

If you are going to buy 350 specific parts for it (a good idea) just remember that a CFI 350 made more power in the '82 Corvette than the '84. You should check to see if there is any difference between the two in any parts you get for it. IIRC, the '82 had 230hp, and the '84 had 200. It might make a difference in what parts would be a better choice, but it may make no difference at all.

 

There was no power difference from 82 to 84, the parts all all the same. The 82 intake is slightly different, but doesnt make any difference. The 747 ecm isnt actually a faster ecm, but uses different code to make it seem faster. Plus the ecm is fully hacked so tuning is easy. The stock ecm isnt well known.

Check out the crossfire forum for all the info you need.

www.crossfire.webhop.net

 

my last post didnt register with the forum

"There was no power difference from 82 to 84, the parts all all the same. The 82 intake is slightly different, but doesnt make any difference. The 747 ecm isnt actually a faster ecm, but uses different code to make it seem faster. Plus the ecm is fully hacked so tuning is easy. The stock ecm isnt well known.

Check out the crossfire forum for all the info you need.

www.crossfire.webhop.net"


bump..

 

Keep in mind there were no CFI F-bodies made in 1984... All V8's were Carbs...

John

 

Stay away from CFI.
.
TBI is ok, just not the CFI flavor of TBI.
.
Go with a reasonable cam,
avoid the 'swirl-port-cylinder-heads'.

 

more ignorance?

Have you ever even owned a crossfire engine? Have you spent years modding it? Have you cracked 13's with one?

If you answer no to any of these questions then kindly keep to yourself.

 

Hey, lack of knowledge doesn't stop some people from sharing their "wisdom" here...

 

You are soooo right

 

All I know is I took a 350 CFI car out for a spin, The transmission was going out, But I was Honestly surprised... It REALLY moved...

It was an 82-83 Camaro that someone said they used a 350...

John

 

I reccomend looking into the X-ram system.

www.x-ram.com

~Nick~

 

i ran cfi for a while and it is definatley not trouble free from my experience it's well worth to switch to carb but thats just my opinion you can use it how you want it.