bballboy06

im looking to have a lope idle on my 79 L-82....i recently installed dual exhaust (magnaflow) and now i am looking for a better cam, and potentially with a lope idle that will still run all of the vacuum.


any thoughts?
or does anyone know of a profile that i need?


thanks

scottyp99

If you just want a mild lope, I think the L82 will lope a little bit if you retard the timing and adjust the idle a little on the lean side, and at an rpm that is lower than stock. Cheaper than installing a new cam.

Scott

bballboy06

also looking for a jump in performance also if possible?

thanks

63mako

http://www.summitracing.com/parts/cc...make/chevrolet If your looking for a flat tappet cam.

LB66383

Look at the Comp Cams "Thumpr" line of cams. They're designed to give that lumpy idle and provide an increase in performance.

Yeller81USNRet

I put a Summit 1103 cam in my L81 because I was after the lopey sound . It worked great for me. I don't know if there any HP gain or not.

7t9l82

my L-82 has a nice lope to it i think it is a bit more now with the 1.6 rockers. personally i think buying a cam for sound is nuts, if you want a boost of power put a set of 64 cc chamber aluminum heads on it . then see if you need more power,

scrappy76

Really ? In that case just pull a plug wire or close the choke 3/4 of the
way, you will get a lope these ways too.

wilcar

I ran an Isky 264 mega cam 214-214 @ 050 450 lift on a 108 l..a in my stock 76 l82 and had a nice idle and tons of low and mid range. Good cam for a low c.r. 350 and is an older design that will work fine with stock springs. Stay away from the thumper cams, way too much duration for a stock l82. The isky 264 is similar to the old comp 268 hi energy cam but on the 108 lsa which will help build some low speed cylinder pressure. Works fine with a stock converter too.

63mako

This cam has a slight increase in intake duration, bigger exhaust duration which is needed with stock heads. Tight 108 LSA vs 114 on stock, More lift for better filling. All combine to increase overlap that gives you the lope yet intake closing point won't decrease DCR. Wide powerband and better bottom end and midrange than stock. This cam is designed for a 9 to 1 compression ratio. Your L82 cam was designed for the 11 to 1 L46. L82 don't have the compression to run that cam effectively. Stay away from the "thumper" line of cams. Contrary to the hype they will not make the power your stock cam makes. Almost any cam will work. Some better than others. Getting the lope in a 9 to 1 compression engine and more power requires careful choices. To big drops cylinder pressure reducing power and to small kills your top end on that fully forged bottom end and won't sound like you want.

bballboy06

i recently swapped the heads for double hump heads with after market valves and springs..64cc combustion chamber..getting the compression hopefully in the 10.5 range..

any other ideas on the cam?

thanks

7t9l82

your about 10-1 compression.

bballboy06

I also am going to us the thinner gasket.. That should help also right?

63mako

L82 with Felpro 1094 and 64CC heads is 10.03 to 1. That is all you get, nothing more without milling the heads, decking the block or changing the pistons. That said your a full point higher than anybody could figure from your original post until today so any advice until now discard because we did not have the info needed to make a solid recommendation. What rear gear ratio and trans do you have? What heads? Are they freshly rebuilt or new? Have you done a compression test and leakdown test?? What are your goals? Is the sound what your looking for with performance not a priority?

bballboy06

Not sure of the gear ratio... Auto transmission.. Double hump heads rebuilt with after market parts... Screw in studs ... Ported and polished .... Going to be working on the compression and leak down test this weekend... Just looking to get better performance, don't have to be anything crazy... And the lope idle....

Also have put a edelBrock performer and also edelbrock carb...

63mako

Need to figure your rear gearing. A 3.08 rear end with auto can not take as much cam as a 3.70 with auto. Either will likely need a convertor upgrade to effectively use the RPM range of the cam you will need with 10 to 1 and iron heads.

bballboy06

i want to say that i have the 3.70...

any recommendations on the converter?

any recommendations on a new Cam?

do i need a new cam to get the HP and lope idle that i am looking for?

63mako

http://www.summitracing.com/parts/hr...make/chevrolet

2400 stall convertor. Ask someone else for a convertor recommendation. I'm a manual trans guy.

Ibanez540r

You may want to verify... The L82 cars (78-79) used a 3.70:1 ratio with a four-speed (3.36-optional) and 3.55 with an automatic.