Okay, so I became somewhat realistic and decided I want to make my new engine a bit more streetable, so I ordered a cam and lifter kit last night since the guy didn't include the cam he said he would with the engine I bought

Ordered a CompCams XE268H-14 cam/lifter kit. 224/230 duration with .487/.490 lift, and a 114 LSA. Will be used with CompCams 7812-16 high-energy pushrods and CompCams beehive valvesprings. Stock valves for now until I get the heads worked over by Lloyd Eliott. Picked the 114 LSA to make computer tuning easier and to try to eliminate any possible lope. Want my car to sound as stock as possible at idle.

Anyways, am I going to have any issues running this cam with an 11:1 CR on aluminum heads and a 180* t-stat? I can run a 160* if I have to since the car won't be run during the colder months anymore.

I was tired and in a hurry to order a cam last night and forgot about my compression. I was looking at the XE274 and XE284 cams to help bleed some of the compression off and forgot about this last night when I ordered. Don't want to have to run water/methanol injection just to drive my car.

 

Forgot to mention, I don't have a problem paying more to use 93 octane. In fact, I expect to have to. Car will be on MAF for probably the rest of this year and converted to S-D sometime over the winter or next spring if I can get a few weekends home from school.

d'oh also wanted to mention I'm not running EGR at all.

 

You could install the cam retarded and run thick(er) head gaskets if you have your mind set on the small chamber LT1 heads or any mild cam.

 

Anybody else? I'd like to run the higher compression if possible.

 

I'd guess the biggest issue would be you may be a slow timing curve..maybe have to back off on totakl timing too, depending on your heads, and a ministarter to spin it well.

 

Have a ministarter, but I'm pretty sure its not one of the high-compression ones, I honestly didn't think about that recently. Remember thinking about it months ago but it kind of faded from my mind.

Figured I may have to cut some timing. We'll see how it all works out. I'm almost thinking I should have gone with the XE274 230/236 cam..

 

Ya know...I realize there is a shipping return, but since you just ordered...means ya don't have have it yet, so why not get one more for your setup?

I could see the delima if you already installed it and had second thought, but better to be correct, than sorry

 

the 114 lsa will not keep you from hearing a lope. mine is very noticable. it is 220/230 dur, .510 lift 114lsa.

 

I don't know, I can't decide. I'm trying to keep the peak HP under 6k, closer to 5500RPMs. The XE268 will give me more low-end torque too at the expense of some high-rpm horsepower.

I guess I can always use a different head gasket to knock the compression to mid 10s or so if I have to.

As for the difference in the cams, I know its possible to tune a 110LSA cam with EFI, but I figured I'd make it easy on myself with the higher LSA. Lift is a bit lower though on the XE268H-14 at .480 vs. the .490 on the XE274-10. Maybe I'll just go with the XE268H for now and when I get the heads done by Lloyd Eliott, I'll get one of his cams to match.

 

useing a thicker head gasket will lower your c/r but it could make your engine more prone to detonation because the thicker gasket opens up the quench area killing the needed tubulence to make a wedge chamber work the quench should be .030 to .045 . I run L98 (58cc chamber) heads with flat top pistons .004 in the hole and a .028 thick gasket with a comp 280 magnum cam and 32 total advance @3200rpm no ping.

 

oh fiy, the comp extreme energy line is not designed to work with compression ratios over 9.8:1. anything more than that and you will experiance a low speed preignition(ignition of the mixture before the spark). basicly they develope soo much cylinder pressure from the fast ramp rate that they preignite on even premium gas. i asked comp several times why they did not state this in their catalogue, and there response on a few occations was "we ment for it to be in the catalogue" and "salesmen like yourself should make sure you alert the customer when they perchase this line from you". so be advised, not many people know of this problem.

 

Awesome. Though they probably mean 9.8:1 with iron heads? Meaning like 10.5-10.8:1 with aluminum should be okay? Hopefully, I guess we'll see what happens. It is going to be my summer-only car for all of 3 months during the year now, so I guess its not a big deal if I have to buy octane booster for it every tank

 

Duron, most of Comp cams are ground from 4 to 6* adv. I would install the cam streight up (See above post) to kill some of the cyl pressure. If everything works out you can always adv. it back to where it was. Oh, and Flies is right on the button.

Auggie

 

Is that a roller?
If it is and they give you a hard time on returning it, send me a mail. Its slightly bigger than what I was looking at (218 to 220) but maybe we can work it out so you can get what you need.
Jp

 

Nah, non roller. I think I'm going to try and use it actually.