Looking for Cam Recommendations
Thread Starter
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
Looking for Cam Recommendations
When I bought this car, it had a Summit circle track cam in it. It is extremely lopey and sounds great, but it does not like to idle, has no low end power, and has so much overlap at idle you might as well put your face in a bucket of gasoline.
Camshaft Type:
Hydraulic Flat Tappet
RPM Range:
3250-6750
Intake Duration:
298
Exhaust Duration:
300
Intake Duration (.050" Lift):
238
Exhaust Duration (.050" Lift):
244
Lobe Separation:
106 °
I'm in the process of pulling the engine now for a yet determined problem, but while it's out, I'm going to swap it for something a little less aggressive.
Any recommendations? Looking for something hydraulic that still sounds fancier than stock but it more street-able.
Camshaft Type:
Hydraulic Flat Tappet
RPM Range:
3250-6750
Intake Duration:
298
Exhaust Duration:
300
Intake Duration (.050" Lift):
238
Exhaust Duration (.050" Lift):
244
Lobe Separation:
106 °
I'm in the process of pulling the engine now for a yet determined problem, but while it's out, I'm going to swap it for something a little less aggressive.
Any recommendations? Looking for something hydraulic that still sounds fancier than stock but it more street-able.
Heel & Toe
Joined: Nov 2020
Posts: 16
Likes: 9
From: Aledo Texas just west of Fort Worth
When I bought this car, it had a Summit circle track cam in it. It is extremely lopey and sounds great, but it does not like to idle, has no low end power, and has so much overlap at idle you might as well put your face in a bucket of gasoline.
https://www.youtube.com/watch?v=YlSJ2qqeWQQ
Camshaft Type:
Hydraulic Flat Tappet
RPM Range:
3250-6750
Intake Duration:
298
Exhaust Duration:
300
Intake Duration (.050" Lift):
238
Exhaust Duration (.050" Lift):
244
Lobe Separation:
106 °
I'm in the process of pulling the engine now for a yet determined problem, but while it's out, I'm going to swap it for something a little less aggressive.
Any recommendations? Looking for something hydraulic that still sounds fancier than stock but it more street-able.
https://www.youtube.com/watch?v=YlSJ2qqeWQQ
Camshaft Type:
Hydraulic Flat Tappet
RPM Range:
3250-6750
Intake Duration:
298
Exhaust Duration:
300
Intake Duration (.050" Lift):
238
Exhaust Duration (.050" Lift):
244
Lobe Separation:
106 °
I'm in the process of pulling the engine now for a yet determined problem, but while it's out, I'm going to swap it for something a little less aggressive.
Any recommendations? Looking for something hydraulic that still sounds fancier than stock but it more street-able.
I would go with some in the 112 to 114 range with a mid 220 intake and mid 230 exhaust. Will run good have good power everywhere and sound like it has a cam
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
Is it a 350? Or does that say 383 on the valve cover? Just curious, with the cam you have now, is there enough vacuum for headlights and brakes?
Last edited by BKbroiler; Apr 30, 2021 at 03:00 PM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
What trans, gearing do you have? Hard to give an answer really.
stock compression and heads?
Dave at Crower Cams and Ron at Isky can get you the right one the first time.
stock compression and heads?
Dave at Crower Cams and Ron at Isky can get you the right one the first time.
Last edited by cv67; Apr 30, 2021 at 03:05 PM.
Intermediate
Joined: Aug 2020
Posts: 37
Likes: 3
From: Laveen AZ
This is the cam I just picked up for my 79, I haven't ran it yet but it is reviewed well.
https://www.compcams.com/magnum-230-...all-block.html
https://www.compcams.com/magnum-230-...all-block.html
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Its impossible for anyone here to pick the perfect cam for your app w/o any data on your engine.
It requires about 20 questions to verify exactly what you have and what your intentions with the vehicle will be.
Please, call a pro at any of the cam manufacturers and have them set you up. Its what they are paid to do.
It requires about 20 questions to verify exactly what you have and what your intentions with the vehicle will be.
Please, call a pro at any of the cam manufacturers and have them set you up. Its what they are paid to do.
Last edited by HeadsU.P.; May 1, 2021 at 07:36 AM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,212
Likes: 9,350
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Look through the compcams extreme energy line. They sound good and have great streetable manners. Ive used them for years.
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Verdad Gallardo
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
This is the cam I just picked up for my 79, I haven't ran it yet but it is reviewed well.
https://www.compcams.com/magnum-230-...all-block.html
https://www.compcams.com/magnum-230-...all-block.html
Thread Starter
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
Thread Starter
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
Thread Starter
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
Its impossible for anyone here to pick the perfect cam for w/o any data on your engine.
It requires about 20 questions to verify exactly what you have and what your intentions with the vehicle will be.
Please, call a pro at any of the cam manufacturers and have them set you up. Its what they are paid to do.
It requires about 20 questions to verify exactly what you have and what your intentions with the vehicle will be.
Please, call a pro at any of the cam manufacturers and have them set you up. Its what they are paid to do.
Thread Starter
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
Melting Slicks
Joined: Dec 2009
Posts: 3,233
Likes: 657
From: Thunder Bay
The cam you choose depends very much on your compression ratio. Do some research on 'dynamic compression ratio' and select a cam that will give you about 8.5:1 with aluminum heads or about 8:1 with cast iron. Personally I like about 224 degrees of intake duration (@ .050") and a 110 deg. LSA. You might want to use a dual pattern cam with a little more exhaust duration depending on your heads. To me these numbers represent a nice compromise between performance and driveability, but if you put one in an engine with too much compression you will have a detonation problem. If you put it in an engine with too little compression it will be a dog.
I agree your engine has way too much cam. Sounds cool but it must be a bear to live with.
I agree your engine has way too much cam. Sounds cool but it must be a bear to live with.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
If those heads are 76cc your compression is somewhat low
64cc without the block or heads decked youd be lucky to see 10:1
Pistons can be .025 to .045 in the hole
If you pop a valve cover there will be a part number cast in (they are raised). What are the last 3 digits?
Id be temped to say an Iaky 270 mega cam without knowing more.
Sounds good makes more torque than the 350hp cam. Fun to drive, will work power brakes
Can be used with a stock converter but works real good with a 2600
Dual patterns with tight lsa blow all your torque right out the tailpipe unless you got lots of rpm
Opinions may vary...man would an upgraded set of heads wiht that cam be fun...nice 180cc piece.
64cc without the block or heads decked youd be lucky to see 10:1
Pistons can be .025 to .045 in the hole
If you pop a valve cover there will be a part number cast in (they are raised). What are the last 3 digits?
Id be temped to say an Iaky 270 mega cam without knowing more.
Sounds good makes more torque than the 350hp cam. Fun to drive, will work power brakes
Can be used with a stock converter but works real good with a 2600
Dual patterns with tight lsa blow all your torque right out the tailpipe unless you got lots of rpm
Opinions may vary...man would an upgraded set of heads wiht that cam be fun...nice 180cc piece.
Old Pro Solo Guy
Joined: Dec 2017
Posts: 8,088
Likes: 4,446
From: Marlton NJ
Agree with the above. Talk to a pro at the cam mfgrs. Or 2 or 3.
Stay under 230 degrees or less for a great street cam. 230 and above you very quickly sacrifice idle quality/vacuum/low rpm TQ
In your case it is not the 230 degrees that is killing it, it is the extremely tight race only 106 lobe center. That needs to go!
110 to 112 is probably a minimum.
The rest of the details will depend on you compression, gearing and intended use. Have all that available before you call or they can not really help you.
BTW my 230/240 duration roller on my 454 generates 15 " of vacuum at idle due to it's 110LC. Sounds great and has peak TQ at a low 3300 rpm with a 2200-6300 powerband.
Stay under 230 degrees or less for a great street cam. 230 and above you very quickly sacrifice idle quality/vacuum/low rpm TQ
In your case it is not the 230 degrees that is killing it, it is the extremely tight race only 106 lobe center. That needs to go!
110 to 112 is probably a minimum.
The rest of the details will depend on you compression, gearing and intended use. Have all that available before you call or they can not really help you.
BTW my 230/240 duration roller on my 454 generates 15 " of vacuum at idle due to it's 110LC. Sounds great and has peak TQ at a low 3300 rpm with a 2200-6300 powerband.
Last edited by leigh1322; May 1, 2021 at 11:21 AM.
Thread Starter
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
If those heads are 76cc your compression is somewhat low
64cc without the block or heads decked youd be lucky to see 10:1
Pistons can be .025 to .045 in the hole
If you pop a valve cover there will be a part number cast in (they are raised). What are the last 3 digits?
Id be temped to say an Iaky 270 mega cam without knowing more.
Sounds good makes more torque than the 350hp cam. Fun to drive, will work power brakes
Can be used with a stock converter but works real good with a 2600
Dual patterns with tight lsa blow all your torque right out the tailpipe unless you got lots of rpm
Opinions may vary...man would an upgraded set of heads wiht that cam be fun...nice 180cc piece.
64cc without the block or heads decked youd be lucky to see 10:1
Pistons can be .025 to .045 in the hole
If you pop a valve cover there will be a part number cast in (they are raised). What are the last 3 digits?
Id be temped to say an Iaky 270 mega cam without knowing more.
Sounds good makes more torque than the 350hp cam. Fun to drive, will work power brakes
Can be used with a stock converter but works real good with a 2600
Dual patterns with tight lsa blow all your torque right out the tailpipe unless you got lots of rpm
Opinions may vary...man would an upgraded set of heads wiht that cam be fun...nice 180cc piece.