i have a CFI camaro and the car is totally stock. so iam now trying to do some mods to it. i need any suggestions on some good heads to give me some more horses.


any suggestions please i need help this is my first camaro.(car)






thaanks :hail:

 

First car, and you already thinbk you need to swap heads.....

You need to do some reading before you go off and blow money on the wrong stuff in the wrong order.

Start here at the Crossfire Vault.

1. http://www.crossfire.homeip.net:81/cftest/
or
http://www.crossfire.homeip.net:81/



2. Use the search tool at both the CF Vault and on ThirdGen, for things like "first mods" or "dyno test" or "LU-5". Then READ. You might also just browse each of the sections rather than searching.

3. The hints are that you should do exhaust mods FIRST, before anything else. You probably should then remove the Crossfire intake and perform the porting mods to it. If memory serves, someone on the CF Vault took a bone stock 82-83 305 CFI (Crossfire Injection) Camaro and track tested it --- and THEN he started modding it. So finding that post and following his lead would be a smart (and inexpensive) way to go.

4. Sure, better heads will make the car faster..... but the heads are not the weakest link in your car. The weakest areas are

(a) the exhaust
(b) the stock intake manifold (which only needs mild porting)
(c) stock cam

After those are modified, then yes you might want to think about either head porting or a head swap. But that's getting way ahead of where you are now... and you can modify the exhaust + intake + cam fairly inexpensively. So IMO you should start there, and in that order. AT least as far as engine mods go. HTH.

 

thank you for that information. that's the type of help that i need.
do you know of any books that i can read. thanks again.

 

Specifically as it relates to the Crossfire -- not really. That manifold, plus the TPI manifolds (among many other examples) use acoustic tuning to help cylinder filling. That subject is covered in many books, and the higher-level the book the more details on how/why. None of them really doeal with the subject correctly though, and for that you need to go to an acoustics book (and that means going to college first).

So, if this is your 1st car, then you are probably still in high school --- so I don't recommend any book except for perhaps those by David Vizard. Do a search on his name as the author at www.amazon.com and you'll get a long list of stuff he's written. He's very good at what he does, the writing is clear, and I give him a lot of credit because he's backed up a lot of his statements with the work of others.

As far as other places to read --- this board is pretty good if you can get past the juvenile bickering. The CF board is better quality-wise, but I'll add that it's probably only better because the members are generally older, they have more experience, more money, more maturity and have already made mistakes and learned from them. I can't say all that, on the whole, for this group.

Between this board and the CF Vault website, you have a ton of info to read and learn from, that covers the engine to all other parts of the car. That's better info than you will find in most books (except for perhaps the Factory Service manual for the 82-83 Camaro/Firebird). And you won't need to spend any $$$ other than a web connection. HTH.

 

John Lingenfelther(spell?) on small block chevy is the book in my opinion. there are F body Camaro books out there that give you valuable tuning info. The crossfire is the one area you will find little or less. honestly the crossfire forum is where you want to do some searching and learning on the crossfire engine design itself.

 

Chevyhacker (a guy in the same club i'm in, fl-thirdgen.org) has a 15.4 1/4 83 XFire, on his 305 with not to serious of mods. He also Dynoed 175hp@4800/250lb-ft@2700 at the wheels at Corvette Masters' dyno in Orlando, FL.

He is building a 350 to put the Xfire on.

http://www.fl-thirdgen.org/chevyhacker.html
==>What he has done

www.crossfireinjection.com
====>how to's he has written


Do not give up on Xfire. Almost the same thing has TBI, but we have more aftermarket. You're going to have to get creative.

 

Good points both, by Ronnie and Fredless.

Yes, Lingenfelter would be the other guy (and author) besides Vizard that would be worth reading. And Fredless got the name that escaped me (Chevyhacker) who did the careful (and ongoing) work on a CFI Fcar. I know Chevyhacker has posted on the CF Vault, and I think he sometimes posts here too.... so look for thgose posts and follow his lead.

The CF (Crossfire) injection, sometimes called CFI, is TBI. The only differences it has with the later TBIs in the Fcars is that the CF has two separate single-bore throttle bodies, and the later cars have a single dual-bore unit. The bore diameters are the same, they can both do as well flow-wise.

Measurements by Ken73 showed that the stock CF throttle bodies together can total over 550 cfm and that's more than enough to make 300 hp at the flywheel.

The only other significant difference between the 82-83 305 TBI Crossfire LU-5 and the later 89+ 305 LO3 TBI are the intake manifolds themselves. The Crossfire engines were rated at 240 and 245 ftlbs torque if memory serves, and the LO3 at 255 ftlbs, but the LO3 got roller lifters and the LU-5 didn't. So it's not completely clear whether there is any significant difference there, and both the CF cars and the LO3 TBI cars have run quite well after mods.

In addition, the cams on both engnes were probably different, as was the engine management (i.e., the ECM), but I don't know the differences well enough to say anything useful.

HTH.

 

That was one fo the best and most informed replys regarding a CFI I have ever seen!
1. Exhaust
2. Ported intake
3. Cam
4. "crossfire" search on this and browsing the CFI vault.

Just so you know, you should be able to get the car into the 14's with just exhaust and basic tunning.

The cam in the CFI is the same as the L69 HO, so it's not too bad (for a stock cam). The computers are different between the CFI and the LO3. The CFI is for more antiquated, but that isn't neccessarily a bad thing. It's easy to "trick into making it do what you want. Look at my sig. for my cmputer mods and my engine combo.