I loved my 224/236 comp. Had a good idle and no cam surge. You could always have something ground similar to what's in my new motor.

 

Well it may be a comp "custom grind," which just means they don't have a warehouse full of them. I may run home at lunch and check it out. It's pretty mild, should have great low-end and mid-range. It also should work well as a nitrous cam, which is what I bought it for. I was planning on spraying until I bought the blower.

 

The ZZ4 sure wouldn't drive like stock, so among the other issues with it that precludes it based on your requirements. Tell us again what heads you going to be using?

Rich

 

okay i will tell you the motor build up.

block .030 over- 355
stock heads hoged out/polished,gasket matched,three angle valve job.
ex612 springs and hardware
Wiseco blower pistons/rings
Forged crank/rods

what i'm getting at is i don't want the idle to seem like its going to stall or sound rough like cams tend too. a nice little lope alittle over stock for a weekend drive here and there in traffic around town.

 

okay i will tell you the motor build up.

block .030 over- 355
stock heads hoged out/polished,gasket matched,three angle valve job.
ex612 springs and hardware
Wiseco blower pistons/rings
Forged crank/rods
bigger valves

what i'm getting at is i don't want the idle to seem like its going to stall or sound rough like cams tend too. a nice little lope alittle over stock for a weekend drive here and there in traffic around town.

 

It is my opinion that the 212/226-112 cam will work pretty well. I've seen single pattern cams work with supercharging as well as cams with a mild split. In every dyno test that I've seen or participated in, the exhaust duration and lift isn't all that influential on hp and torque unless it's way outta' whack. Also, with only 212/226 duration, the overlap will be minimal, even on a 112. I don't necessarily agree that 114 is always best for blowers and turbo. There's a recent post over on LS1tech.com where a YSi supercharged LS1 made 1000+ hp at 12 psi boost using a cam that was 25X/26X-108. That's gobs of overlap and the power was still quite impressive, even at low rpm.

Mike

 

If I am thinking right, Bret on here grinds some of his cam with some Overlap to them 114+ is not always needed.
Rich you care to elaborate on that, lol J/K

But I did see a 355 with out of the Box 210 AFR heads on a D1SC make 700RWHP. Cam was a 230/244 they didn;t give out the LSA for a reason B/c Its Tight I bet, lol. Or I could be Just wrong

From What I have seen a Blower car with a Nice exhaust system doesn't need a wide overlap period. Overlap is needed somwhat, it will produce better Tq and probably a little more HP. A Blower will only push so much air.

 

Engineermike- so would i still have to have the cam you listed custom grind? i'm not sure what custom grinding a cam is or what the purpose/need for it is?

 

Also the guys on the board that custom grind the cam,do i buy the cam off them and they grind it and ship it. or do i buy a cam and send it to them?

in summits magazine i see a Comp Cams K-Kits?

5 different cam choices and you get timing chain,lifters and head hardware.. what about that kit? i need to upgrade the timing chain anyhow..

 

You provide your engine specifications to a cam designer so that he can optimize a cam for your specific motor and application. The cam designer will determine the cam specifics so that it meets your needs. (eg. street car or all out race car, etc.) Typically, the cam designer will have the cam ground for you and shipped to you once its ready. One of the items left out of the discussion has been dynamic CR. Dynamic CR is one item that's a major factor in determining whether or not a blower motor is gonna run well on pump gas. A good cam designer will make sure this is spot on.
Bret did my cam. Although I don't have numbers yet since the motor is being broke in without the s/c, I must say I'm surprised how well the motor runs with a CR of 8.7:1 and no blower.

 

Don't mean to change the subject, but a couple people mentioned that they had the Brand hard tubes - would you PLEASE tell me where to get one? because I cannot figure it out - I just can't find it anywhere - Thanks!!!

 

I think the LSA aspect of this discussion in unfocused. I agree that all else being equal, two otherwise identical cams with one on a 112 and the other on a 114 LSA will not be very different. But the bottom line is that nearly everyone here shoould either use a known effective cam for their application or pay the extra $100-$150 bucks for a customized design. Trying to spec out your own is likely to leave otherwise "free" hp on the table. My advice: go with an off the shelf blower grind or pay the extra $$$, do not DIY.

As far as what a "custom" is, in this context it means you pay someone to specify the lobes to be used and the LSA from a cam manufacturer's "library" of lobes. The lobes themselves are not "custom" designs, only the choice of lobes and the LSA. The people who do this will also supply or specify the pther parts you need such as valve springs, etc. Keep in mind that a blower motor will need more seat pressure than a similar NA setup to compensate for the boost trying to keep the intake valve from seating. The correct PR length needs to be measured when the engine is mocked up.

Rich

 

The cam I listed (212/226-112) is the one you already have (ZZ9).

 

well i never bought it from my buddy yet,i still have to go get it. i'm using combination motorsports ex612 springs and hardware. i'm going to upgrade to the next size up valves from stock? what is the next size up on the exhaust/intake? also what size valve seals do i need?

Rich- so either i call Comp and ask for a blower cam or i buy one custom grind from someone and i would inturn gain some extra hp over just buying one off fhe shelf... correct?

 

I would go to a vendor like CM for an off-the-shelf grind. You will pay less than going direct and probably get better advice. A custom should come closer to making an optimum result for your needs, perhaps make more hp. Keep in mind that cams are an exercise in compromise. Working with someone knowledgable to spec one out for you is more likely to be the best compromise for YOU, rather than a generic solution.

Rich