Hello everyone--

Why is it that the Cross-Fire Injection system has such a bad rap with many people? If I'm not looking to do any engine/ECM mods, will this system survive or am I going to be stuck with a lot of trouble in a few years? Does anyone know the history behind this setup? I heard that it was developed by the Corvette guys and then "stolen" from them by the F-body engineers.

I have an 82 T/A with the CFI (and 29,000 miles) and am looking to keep it original. Even though it's not all that fast, I just want to keep it that way.

Car runs excellent now, but I want to know if it'll stay that way (I just did a major tune up with new Delco plugs, wires, oxygen sensor, fuel filter, air filters, distributor cap & rotor).

Any opinions on the CFI system or historical info would be greatly appreciated.

 

take it off and keep it for the future but for everyday it sucks and if it breaks you have to replace it anyway

 

it functions quite well and is very reliable. i ran stock on my car for 80,000 miles and the EFI performed quite well. the issue is it is quite restrictive in the flow #'s. it has been successfully ported by a few owners when other mods necesitate more intake flow. i think the early car magazines that attempted to garner more HP were frustrated in that their attempts were not all that successful. i believe GM wanted their EFI on vette to be something special so they likened the design in some ways to the old Z28 crossram.

 

Initially it had no bad rap when it was introduced in 1982 on the Corvette. It was retained on the 84 Vette (no 83 Vette produced) but was replaced by TPI for the 1985 Vette. By the time TPI came out, there were some maintenance issues with CFI that TPI didn't have so it was regarded as inferior by many. People that wanted a LOT more power (in an era when there were zero DIY EFI retuning tools) removed the CFI and replaced it with a carburator. Some people did that to TPI for the same reason because both CFI and TPI are airflow limited by the small-area long-runners. Those are great for mid-speed torque production but not good for high-speed power.

It's TBI, it's just two separated single-bore TBI units... so it's as reliable as TBI is.

I do and "stolen" would be a huge overstatement. See my post here.

There is no reason why you can't keep it original (looking) with the CFI and still make it run extremely well. The intake can be ported as shown in many of the threads and tech articles at the Crossfire Vault website. What your engine needs is a good exhaust for starters, and then you have to decide exactly how much performance you want. Modding the CFI is no different than modifying a TBI car. HTH.

 

Modding the CFI is no different than modifying a TBI car. HTH.[/QUOTE]

this is what i did.

 

Anyone know what's up with CrossFire Injection Vault????

 

I was able to browse and post last night. Couldn't get in today. It is a small site with a fellow or two for maintenance. It'll probably be back tonight or tomorrow. It can be unavailable for any number of legit reasons.

RBob.

 

Excellent, thanks. I didn't know if it had been gone for a while or not.

 

here is the problem...

http://www.crossfire.homeip.net/cfte...5Cp9150080.jpg

 

that issue can be rectified by some serious porting. unfortunately it takes a lot of time and patience and skill. i dont have any of PRIOR so i replaced system with a holley projection manifold 454 TB unit and a pair of 80 lbs injectors and never looked back. i needed to spin to 5800 rpms.

THE ANTICROSSFIRE.

 

Funny. When Holley came out with the pro-jection, I almost swapped mine out for a 4bbl intake and a holley 4bbl pj TBI body. I thought it might be very close to a bolt in. But I sold the car instead.

 

I have an 83 T/A with the Crossfire injection. It has over 250,000 miles, still has the original intake and still runs great. The 305 got replaced with a 350, I've been through the trans, had to replace the ring and pinion. I've never had a problem with the fuel/intake system, except of course the fuel pump. Seems fairly fast to me with not many mods. 305 to 350, a corvette chip, and 3.23 to 3.73 are the only performance mods.

 

the newer 4 barell holley tbi's are progressive linkage. that is an aid to getting AE dialed in.