Cam size for 468
 

Looking for a cam size for a 468 . BBC , 990 gm heads (ported Joe Gentile) , 2950lbs ( with driver) , 4:11 gears , turbo 400 , 4 link rear , 13:1 comp , alcohol with rons toilet . Does anybody have any suggestions or remarks considering set up .

I am also looking at upgrading to aluminum heads but would like to purchase a set that will flow for a 555 - 598 . Will any performance be lost or gained by putting such a big head on a small motor .

Thanks ,

Mark

I also forgot it has an 8" converter that stalls at about 5600 and has a victor jr intake .

Thanks

Call Curtis @ RFD for the heads, as far as a cam, how fast are you trying to go? Mid 270's @ .050 on a 110 LSA roller will put you mid to low 9's. You should get the heads before making a cam decision.

Re: Cam size for 468
 

The big heads always have worked on a smaller motor for me, dart 355's on a 468 @ 2000lbs 680/720 lift cam, gm crank, eagle rods. shifted at 6400-6500 ran 5.00/8.00 all day

I would like to get into the high 9 s at 4000' da . Currently I am running 10.25@ 129.5 mph with a not so good tune (egts are 1090 - 1140 ) . My 60' is 1.45 . Does anyone think this is possible with the cast heads .

Thanks ,

yep, i do. you did not give any info on your current cam, the numbers laid out by hammertime sound,s good to me for that combo, 990s are a fairly good stock head, and being ported is a bonus for sure. you are close now, getting your 60' time better, would help a lot also.

comp cams 284/294 .725 lift on 110 worked very well for us.5500 converter required.sorry do not remember exh lift.made over 700 on 13:1 468 with a holley tunnel ram and twin 750 80186 doms.shifted 7800.
this was in 1992. :oops:
there are better profiles out there now (comp RX series)...but this served quite well. :D

low maintenance.ran on street every friday (30 MILES EASY)

OVAL PORT DART 370S..very versatile head.get converter restalled for larger head.(its a patch)its gonna be a pig until you stuff more cubes.. :lol:

What are your head flow numbers, intake and exhaust numbers ?
Did they RE CC the intake runner after they finished the port job?

I have a 468 in a 3600 lbs 66 Chevelle. I picked a 268-272 .697-.731 earson camshaft. Car leaves really well"1.36 60 ft on the back tires and runs 6.16-6.18 all day. I have a set of out of the box Edelbrock rpm performer square port heads, 13.3 comp, 400 turbo 5800 converter.....