Desertrider04

im looking for a cam for 84 305...basically im lookin for somthin that should a good lope at idle and i dont wanna have to rework stock heads too much since im not gonna keep this motor long..just somthin to get by till the 383 is done whats the max lift and duration i can run without machining heads? the motor is the h.o l69 with edelbrock carb and intake and hooker 2011's

ede

max would be around .47

Damon

I would suggest a complete exhaust system including headers, 3" y-pipe, high flow cat, and 3" cat back LONG before changing the cam in that motor. The L-69 HO cam ain't all that bad- there are better ones for power, but not through a stock exhaust system.

And I guarantee you don't want a "lope" to the cam. By the time you go big enough to get it to lope you're not going to make any power with the rest of the stock pieces. Plus the computer controlled carburetor system will be pitching a fit with a lopey cam. And you really don't want to try to lift the valves more than .470" without machine work to the heads.

MODEST changes are what's called for.

If you want a SLIGHTLY better cam, try the Edlebrock Performer cam. 204/214 on a 112* LSA. It's also sold as the Summit house brand cam #1102 for dirt cheap ($90, including lifters). It's got more lift, tighter LSA and a little advance ground into it- all helpful in the L-69. Makes a nice little bump in torque and power without moving the basic powerband up very much.

Next bigger cam would be the Summit 1103 cam. Exactly the same as above but with 10* more duration across the board and lift is approaching the limits of the stock head (.465 on the exhaust side). This is about as big as I'd go on an otherwise stock L-69.

Obviously, there are similar cams available from many of the popular cam companies (Comp, Crane, Lunati, etc.). Just keep the basic limitations of your stock motor in mind regardless of what brand of cam you choose

When changing the cam I HIGHLY recommend you upgrade the valve springs. A set of Comp 981 springs or similar are WORLDS better than stock and will install with NO machine work whatsoever. They will work with both above cams. Stock springs have no chance whatsoever of controlling the valves with even a mild performance cam. Having inadequate valve springs for your cam is like leaving a good party at 10pm- you miss out on most of the fun. They're barely good enough for 5000 RPMs with a stock cam. With a performance cam they won't even make it that high. And higher RPMs is what you'll want from the motor when you swap the cam.

Desertrider04

sorry i already have 3 inch exhaust including y pipe out a flowmaster and dual 3 inch tips and as for the computer controlled carb thats gone too along with the computer advanced distributor so my computer is doing nothing in fact im taking that out this week...due to the fact all them wires are makin my engine bay ugly and they arent doing a darn thing so i was lookin at a comp cams unit with 224 adv duration and .470 on both intake and exhaust and of course get the lifters springs, retainers and pushrods while im at it so what do you think of this will it give me what im lookin for or not?

Air_Adam

If you want a cam that will make your car take its ***** out of its purse, use the XE262 from Comp Cams... that'll really wake it up, and shouldn't affect drivebility much, if any. XE256 would also be a good choice.

Sonix

iTrader: (1)

Good (fitting) quotes today fellas! The xe262 is a 218/224 IIRC. A little bigger, but any of these cams would work well.
Pin the rocker studs while you're there, and if you're feeling adventurous, port the heads! why not eh? Just had to toss that one in there.

Intake manifold? Performer RPM will work on the current motor and future one, might be a good idea. $130 or whatever, it's hard to go wrong.

Air_Adam

Agreed... use the Performer RPM or Performer EPS is you plan to use a square-bore carb, like a Holley. The EPS would be better for the 305, but the RPM would work ok on the 305 too, but the RPM is the hands-down winner for the 383.

Desertrider04

i already have the rpm on there along with my 600 cfm edlebrock so it looks like im gonna go with the xe262 since most you guys seem to reccomend it thanks and ill let you know how she all turns out