I was wondering if anyone out there had a Crossfire engine in their ride with any suggestion of the best way to gain power without engine swap? I do plan to do a engine swap but I want to wait and see what'se most I can get out of what I have first.

 

Well.... A good friend of mine has an 84 vette with Cease Fire and has been trying for years to get it into the 12s..

Although I dont have the time right now to type the details, I think it would be easier to make a turd fly. My suggestion to make a cross fire car fast is to **** can the whole mess and put on a carb.

SB

 

and then throw the crossfire stuff into a fast garbage truck.

 

lol, that was funny, so basically the engine swap is my best bet, because I was planning on getting one those new crate 350's that Chevy just put back out.

Thanks

Flint_T/A

 

Yeah probably swapping the whole thing would be the best. Dave(the guy with the crossfire) put in a AFR headed 383 and then put his crossfire back on top of it. He has put in a whole new fuel system, went to 454 truck injectors, had countless chips burned and several other things and never got it running quite right.

Unfortunately, as there are bolts inside the crossfire intake, one decided to come loose one day and fall into one of his cylinders and destoy his motor for him. Since then he had had it rebuilt and is to have many changes in store this time around. He has ported the hell out of the intake, sent his throttle bodies off to a guy who sleeved them to 54mm, bought a TEC II to manage the whole mess and spent a few weeks modeling a cam in one of those simuation programs. It should be much faster this time around, but was it worth all of the effort and $$?? He wants something different and I think he will accomplish that.

I dont know if I should be one to talk though.

SB

 

If you want information about the Cross-Fire and what it CAN do then this is the best place to find it:

http://www.crossfire.homeip.net:81/

I have a superchargerd 1984 Cross-Fire Corvette. It made about 350 hp on the crank with the stock engine.

Another guy on the Cross-Fire forum has time-slips proving that mid 11's in the 1/4 mile are possible with an almost stock 350 Cross-Fire and a 150 shot of NOS.

 

i've an 84 C4 so i know you feelings, however, you have alternatives;

the last time i posted a site with alternatives i was roundly chastised for it, so i will say this;

email me with your request directly, if that is okeh with the censor police, and i will give you a site that will allow you to upgrade your intake manifold and another that will allow you to upgrade your injection to TPI everybody makes products for;

dreameagle;

 

oor... you could swap to somthing totally diffrent and give me your crossfire manifold base.

 

Damnit… I want his crossfire setup (just pulled the one off of my old TA, since I'm parting that car out, but I need an other intake for another project).

Crossfire can work, but what you need to do is get the mindset that it will instead of the more typical "why am I stuck with this thing and I don't want to learn anything…" FWIW, with minor modifications the stock parts are good for up to about 350-380hp at the crank and there's plenty of ways to make more then that (don't buy a lot of the numbers out there, a lot of it is trying to sell you something). My crossfire 305 ran high 13's with what was a stock long block until somehow I messed up 2 cam lobes. It still ran high 14's after that… You don't see many TPI or TBI 305 guys running similar times without much more work (this was all with a stock manifold base, but I messed with just about everything above it and everything after the engine, headers back was pretty much custom). I've bored stock TB's to 54mm, at which point you'll be able to make much more power then you'll ever find injectors for. You can keep the same basic layout and get tons more flow by swapping the base for an Offy/Edelbrock cross ram (copy of the old Z28 manifold)…

There's tons that you can do, and within the limits of what most people actually end up doing with their cars I think it's a better setup then TPI (and before you ask, yes, I own a crossfire, TPI and LT1, the LT1 is the fastest, the crossfire is the most fun on the street, and they all have run between 13.0-13.8 with stock long blocks and mostly stock manifolds…, the crossfire is the only 305)

 

I gained 1.1seconds in the quarter on my 83 camaro by changing the stock exhaust to edelbrock tes headers, y-pipe, and 3" flowmaster exhaust.

I gained another .35 seconds porting the manifold

After continuing to mod it, I now know that my fuel pump didn't have proper pressure, my distributor had issues, and my timing chain was VERY stretched.

So, the moral of the story from my adventures has been - treat it like any other system - work on the basics, learn what you have, and it will perform better. But, just like any other system, there are no magic bullets.

Read the crossfire forum, and if you want any camaro specific info you don't see there, PM me, I will be happy to help with pics or info from my car.

 

Take off the intake, hog out the ports, chop down the runners a little, and make a new top plate that will mount two 390cfm Holley 4bbls, or even just one 650cfm Holley.

 

Heh… don't say it out loud or you'll start getting a lot of crap about how you're full of it. Funny thing is that if anything, the crossfire setup reacts better to this kind of "getting things right" kind of work then a comparable TPI car.

FWIW, I had similar results with headman headers, a custom exhaust setup and assorted intake/tb modifications.

do you have them online anywhere? I'd like to see what others have done with them…

 

BTW, fuel delivery is the big issue here. Forget the factory 8-12 psi, this thing won't work right with less then 12, and I've gotten best results in the 12-15psi range.

 

Yes, my HTML skills are as bad as my mechanic skills, and I update the pages less than I change my oil

www.crossfireinjection.com - Most of my info is there, although I haven't linked to some of my newer tech articles yet.

I have been hunting gremlins for the last few months, and the primary one has been identified - my fuel pump drops below 9 psi under WOT - that will be changing VERY SOON. The fuel pressure gauge and the wideband are my new best friends. This poor motor has been EXTREMELY lean up top. I should have known to change the pump earlier

Just installed the 2" tb's, 80# injectors, and an external regulator (I think i still smell like fuel) - should have pics on that when I get back in town.

I am testing the prominator prototype, so lots of tuning coming soon - Grumpy suggested getting all the new parts in first (likely because it is then VERY close to his old setup) so I shifted focus to that work.

Ian

 

Oh, and funny - the guys that know me no longer have the "anti-crossfire" reputation. I've been to the track enough with the 305 to show them I could hang with the other stock shortblocks.

I personally think it is like any other topic in life - people don't like what they don't understand....

 

Huh… that sounds familiar… Now that I’m parting out my crossfire TA everyone that knows me keeps saying “you’re keeping the engine right? That thing runs great, you can’t let it go” I have to laugh since it’s a stock, ’83 long block pushing 200K miles…

 

awesome info here