Has anyone ever tried or know anything about this cam, Iv checked out the Crane 2040 but have also ran across this one. It actually says its superb for tbi and crossfire setups which is what im looking for. I don't know how if it would be better than the 2040 or what. Also what about the Crane 2050, would that be to big for crossfire?
XFI™, 252XFI H13
Lots of Torque, Excellent Throttle Body Cam
PART #12-364-4 http://www.compcams.com/Cam_Specs/Ca...?csid=119&sb=2

 

Too mild for my taste. The important thing is that it does what you want it to do, in the RPM range you want. With some intake and TB porting, I would think that CFI would handle more cam than that.

 

Do you happen to have one or two in mind? Would be a big help.

 

Nope.

Id wait for some of the CFI guys to chime in. My TBI expertise ended with single TBI motors. Never had a CFI myself.

 

not enough lift with that cam if your looking for more performance. You could almost get that out of just adding 1.6 rockers with your stock cam. Of course it all depends on what your goals are.

I would get something with at least .500 lift, port the intake manifold, and get a tune. Should give you a nice bump in power.

 

So what are the main differences in the Crane 2040 and 2050, Iv read that the 2040 seems to be very popular for the early C4s. Im trying to get as much power as I can with out switching blocks or from crossfire just yet, I really don't have a particular HP goal as of now.

 

The max you can run with the stock pistons is 0.500". I would be careful.

 

You won't realize much gain from changing cams without also porting your intake. The "pinch point" for the crossfire is the intake manifold. Port and gasket match your intake, then change cams but don't get too radical because the stock ECM can't deal with very much cam.

 

Thanks for the info, should make my search a little easier. Is it very hard to find someone to port the intake or is this something that im going to have to deal with on my own. I wanna make sure it gets done right.

 

That's all?

 

The valve springs may be limited to .500 or less (likely less), but I see no reason why the pistons are the limiting factor at .500. SBC pistons sit ~.025" in the hole and all the factory pistons that I'm aware of have valve reliefs.

 

That sounds more reasonable.

 

I did not easily find cam/head specs for a crossfire. This is probably presumptuous, but I wouldn't expect any stock Gen I chevy 350 head to get much out of a cam that had more than 500 lift.

The crane cam you posted is designed (according to their website) for higher gear rear-ends. (Don't know what you have, but they recommend 373 gears or better).

The XFI cam you linked has a big split (for factory head/exhaust issues). That split is a bit more than the crane cam. Plus, the XFI cam has about .030" more lift on both lobes -- but still stays under the .500" mark suggested. It's lift is about .470 vs .440ish for the crane.

Knowing what I know about XFI cams, I'd bet it would perform well in a strock crossfire -- especially if you have low gears. I'd also bet the XFI cam produces better torque.

Without changing the heads, I think that 252 XFI is worth considering. Comp cam advertises more engineers than other companies. That's one reason I'm looking at their options hardest.

If you pick it, note you should use 1.6 rr to get the lift advertised. With your stock rockers, it would be more similar (in specs) to the crane 2040.

 

My rear end gears are stock, but im planning on porting the intake, performance heads, 1.6 rr, headers, true duals w/ crossover, and bored tb's. But most of these wont be done for another 2-3 years.

 

There are several XFI cams available that are all computer compatible. Try downloading the cam selection software from Comp Cams website. I found this cam that I'm looking at for my 85 CCA-CL12-365-4

 

For porting, check www.gethoned.com. They advertise prices for TPI components. They may do crossfire as well.

 

Maybe you should wait and do it all at once. The sum total of parts should match each other in desired function.

For example, I would call the cams mentioned in this thread good for a stocker, but not what's typically sought after for the mods you mention above.

To satisfy current and future goals, picking a cam with .470-.480ish lift (using 1.5 rr) might be best. Change to 1.6 rr down the road and you're above .500" where 180cc "performance" heads need to be lifted. 1.65 or even 1.7 rockers could add more -- if necessary.

You'll probably want/need an LSA for this 2-step approach in the 112-113 range. Intake duration in the 210 - 218 range might also be a good target for both current and future setups.

I agree that downloading the comp cams simulator will help you get a handle on how cams/parts match up.

BTW: All my feedback is general FYI. I know diddly about the x-fire intake/system, but it should apply to Gen1 injected motors. I noticed in a search that there looks to be a special forum for crossfire cars.

 

Well just by hearing everyone's responses on here i am learning much about what i should be looking for. I figure i'll get headers and the exhaust done this spring and then get the rest of them together later to install at once.