1982z28with18s

My setup is Lloyd Elliot heads, Joe Overton custom grind (220/226) on stock bottem end. This is a really small cam but its what I wanted. Flow #'s are here....

http://memimage.cardomain.com/member...90_87_full.jpg


I've ran a best of 11.710 at 116.76 with a 1.65 60ft in 2350 DA at a track that doesn't do crap for prep. With some zero to 200 DA, a GOOD track, 52mm TB, EWP, 1.6 rr's my car has 11.3x's in it. Joe Overton basically helped me set up everything from the cam, gears, stall, tires, etc. My point is you dont need a BIG cam to perform great.

SS MPSTR

Nice size cam, and it obviously works well with your heads and drivetrain. Congrats....that's hauling ***. Question: do you have any vacuum?

AdioSS

I agree that bigger isn't always better, but I do find it interesting that Comp offers hydraulic roller cams with up to 262* duration @.050 with .420 LOBE lift. So, I guess that's as big as you can go

I'll be trying a few different cams in my little stroker on the engine dyno before finalizing my decision. Currently I'm at 230/236, 230/244, 236/248, and 242/248. I'm thinking about trying a smaller one with a really tight LSA just for the heck of it.

dmoss69

As far as lift goes, I don't think I need any more lift. I think that the lift is already there. What I'd like to do is move the RPM band up. This thing is a beast down low now with 342's, let alone with a set of 4.10's.

Not only that, but I can afford to loose some torque down low for HP up top, because during race day, I'm going to shoot N2 straight from the line, so I'll replace the tq that was there. I was thinking around 236/242 cam duration.

I'm not looking to make this an everyday driver again, just a weekend warrior. Maybe I just need to go from the XE grind down to the magnum series. Or GM847.

D Moss

Mindgame

The Comp XR280R is a good off-the-shelf grind for max effort builds. It's streetable but probably not something the majority would want to live with in an every day driver. Bump the idle to 1100 and it'll make things easier for the 350 build. May want to check into that one.

-Mindgame

kamba93lt1

Don't really know. It is just a race car. I have always run manual brakes with this cam. I don't think it has much.

Thanks
Ken

WS6T3RROR

i give up trying to change your mind, but heres some advice from where i've been before. when you start climbing into durations much mast 240* its time to leave the hydrolic crap behind and go solid. and just because your heads peak at .XXX lift isnt a reason to stop when you find a cam with that lift. often times lifting past peak will make more power if you've ever degreed a cam you know that going past it increases the degrees where you're valve is at/past peak flow and that'll get more air in. part of the reason i'll give to justify that is what happens on your engine and what happens on the flow bench are two different things. on another note i believe you said you had 11:1 compression... probably shoulda gone higher with the type of cam you're looking to run. its a system not a pile of parts you throw together on a whim, it all needs to match.

dmoss69

solid is not out of the question. I'll go solid roller.

As far as compression, I can go a little higher, but then I still want to be able to run pump gas. (of course the bleed off during overlap)

XR280R--I'll check into that one.

I just heard a sound clip of 236/242 and GM 847....they both were great.

D Moss

dmoss69

I contacted comp cams with my flow numbers and this is what they recommend me to run. (I'll be getting hydrualic though)

Cam Spec Card Inquiry
PART NO. 12-678-4
01 INTAKE MASTER 6057
02 EXHAUST MASTER 6059
03 ENGINE CS XS282S-10
04 GRIND NUMBER CS XS282S-10
INT EXH
05 HYDRAULIC Y/N NO 14 DUR @.050 244 252
INTAKE EXHAUST 15 LOBE LIFT .3470 .3600
06 VALVE ADJUSTMENT .016 .016 16 ROCKER RATIO .00 .00
07 MAX GROSS VALVE LIFT .520 .540
08 DUR @ .015 TAPPET LIFT 282 290 17 LOBE SEPARATI 110.0
18 ADVANCE 4
09 VALVE TIMING OPEN CLOSE 19 VALVE SPRINGS 986-16
@ .015 10 INT 35 67
11 EXH 79 31 DATE SETUP / /
12 THESE SPECS ARE FOR CAM(S) INSTALLED
@ 106.0 INTAKE CENTERLINE

What do yall think?

D Moss

Mindgame

It'll probably fit the criteria you've set down nicely. It should sound good.

At least they didn't try to calm it down with a wide lsa. Personally, I'd go with a cam that gives you similar overlap period on a shorter duration. That probably equates to something in the 236 range with a 108 lsa. Should be a stronger cam where it counts.

My opinion of course....

-Mindgame

dmoss69

Thanks mindgame.

Everyone! inputs welcome. I'm all ears.

D Moss

dmoss69

Well,

I just purchased the GM 847.

I'll let everyone know what happens.

Thanks

D Moss