PLEASE SUGGEST CAM OPTIONS!!!! thanks
Thread Starter
Race Director
Joined: Mar 2005
Posts: 10,067
Likes: 17
PLEASE SUGGEST CAM OPTIONS!!!! thanks
Here is what I have:
1999 c5 with stock engine, lt headers 1 3/4" primaries, and 2.5" collectors, vararam intake, automatic transmission with an chevy astrovan torque converter (about 300rpm higher stall than stock), 3.42 rear end gears, corsa indy pace car exhaust.
I also have HPTuners, fwiw.
Here is what I want:
to rev my engine to 6800-7000 rpm happily, and idle quality isn't important, lot's more horsepower, and I'm not adverse to putting a bigger tb and fast intake. I ROAD RACE this car, and that is what I want the additional power and rpm's for. Daily driving be damned!
Please offer me up some ideas! I've never done the cam thing in this car and I'm getting to the planning stages now!
Tia
1999 c5 with stock engine, lt headers 1 3/4" primaries, and 2.5" collectors, vararam intake, automatic transmission with an chevy astrovan torque converter (about 300rpm higher stall than stock), 3.42 rear end gears, corsa indy pace car exhaust.
I also have HPTuners, fwiw.
Here is what I want:
to rev my engine to 6800-7000 rpm happily, and idle quality isn't important, lot's more horsepower, and I'm not adverse to putting a bigger tb and fast intake. I ROAD RACE this car, and that is what I want the additional power and rpm's for. Daily driving be damned!
Please offer me up some ideas! I've never done the cam thing in this car and I'm getting to the planning stages now!
Tia
Last edited by 2000BSME; Jun 17, 2010 at 01:07 PM.
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
First off 7k is a solid roller. Specs should be 230-244I/236-248R on a 110...road race. If you are really a street Guy wanting to road race <6 times a year lower the rpm expectation to 6.4-6.5k. And keep roller hyd cam in her. Same specs though with bigger lobe sep at 112-114 as the profiles are different.
Compcams has a good selection of ls-r cam profiles. Solid rollers will need 230+ on the seat/>400 lbs over the nose. Hyd rollers need 150-190 on the seat with no more than 350 over the nose.
Hyd cam 230 deg (profile #3718) .573" I and 234 deg (profile #3727) .598" E ground on 113 lobe advanced 4 deg. ..this is a huge a$$ cam. You will hate life on the street.
Based on heads and stock disp.... solid roller
232 deg (#1498) .595" and 236 (#4873) .639" on a 110 Sep 0-2 degrees advanced.
Btw get rid of the astrovan converter...who sold you that bridge? Get a purpose built high torque multiplication unit 9" converter. A road going auto is going to need a 2400-2800 stall versus the 3000/3600. Converter for drag.
Compcams has a good selection of ls-r cam profiles. Solid rollers will need 230+ on the seat/>400 lbs over the nose. Hyd rollers need 150-190 on the seat with no more than 350 over the nose.
Hyd cam 230 deg (profile #3718) .573" I and 234 deg (profile #3727) .598" E ground on 113 lobe advanced 4 deg. ..this is a huge a$$ cam. You will hate life on the street.
Based on heads and stock disp.... solid roller
232 deg (#1498) .595" and 236 (#4873) .639" on a 110 Sep 0-2 degrees advanced.
Btw get rid of the astrovan converter...who sold you that bridge? Get a purpose built high torque multiplication unit 9" converter. A road going auto is going to need a 2400-2800 stall versus the 3000/3600. Converter for drag.
Thread Starter
Race Director
Joined: Mar 2005
Posts: 10,067
Likes: 17
^^thanks for all of that.
I'm considering doing a manual transmission swap now as well, so cam choices may be opened up too. The astrovan converter was a cheap way of replacing what I suspected was an 'out of balance' stock converter, which turned out to be the case. I definitely don't want to go solid lifter, and I could live with less rpm if that will keep me out of that territory.
thanks again.
I'm considering doing a manual transmission swap now as well, so cam choices may be opened up too. The astrovan converter was a cheap way of replacing what I suspected was an 'out of balance' stock converter, which turned out to be the case. I definitely don't want to go solid lifter, and I could live with less rpm if that will keep me out of that territory.
thanks again.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
For road racing a wide power band 3000+ rpm wide is very desireable. Most tracks you will only be using 3 gears anyway. So ZD1's solid cam ideas are good advice.
IMO - ci is really the king. I've driven a variety of Vettes on the tracks and the small older motor Z0-6's with only 405 hp even modded just don't have a good power to weight ratio. The 427 500 hp+ modded motors are actually kind of fun especially on tracks with elevation changes.
So before you think of big roller cams I would think about putting my money into more ci or a supercharger
Last edited by gkull; Jun 23, 2010 at 04:36 PM.
