Another head question.
Thread Starter
Instructor
Joined: Jul 2017
Posts: 231
Likes: 15
Think of an engine as an air pump. Restriction anywhere reduces flow everywhere. Head flow dictates power potential. Compression increases power. Cam choice indicates where in the RPM band power is made and can optimize dynamic compression which is the compression the engine sees when operating. Matching components to optimize power in the range you need is the key.
I made 300 HP and 380 ft lbs with a truck cam, stock bottom end and these heads. The right cam would dial it up a lot. They flow better than vortecs, take your stock valve covers, intake and are economical. Have 430 HP potential.
http://www.ebay.com/itm/Chevrolet-35...hUkH4f&vxp=mtr
2 1/2" ramhorns and 2 1/2 free flowing dual exhaust at minimums. Headers are way better.https://www.summitracing.com/parts/s...make/chevrolet
I would upgrade to a Performer 2101 minimum, they will match up with the head ports well.
This cam should meet your needs and match the head spring rate although I hesitate to recommend anything but a roller. https://www.summitracing.com/parts/c...make/chevrolet
Use these lifters:https://www.summitracing.com/parts/c...make/chevrolet
Use these head gaskets: https://www.summitracing.com/parts/f...make/chevrolet
Or Use this kit if you want more lift. Springs fit pockets in heads. https://www.summitracing.com/parts/c...make/chevrolet
I made 300 HP and 380 ft lbs with a truck cam, stock bottom end and these heads. The right cam would dial it up a lot. They flow better than vortecs, take your stock valve covers, intake and are economical. Have 430 HP potential.
http://www.ebay.com/itm/Chevrolet-35...hUkH4f&vxp=mtr
2 1/2" ramhorns and 2 1/2 free flowing dual exhaust at minimums. Headers are way better.https://www.summitracing.com/parts/s...make/chevrolet
I would upgrade to a Performer 2101 minimum, they will match up with the head ports well.
This cam should meet your needs and match the head spring rate although I hesitate to recommend anything but a roller. https://www.summitracing.com/parts/c...make/chevrolet
Use these lifters:https://www.summitracing.com/parts/c...make/chevrolet
Use these head gaskets: https://www.summitracing.com/parts/f...make/chevrolet
Or Use this kit if you want more lift. Springs fit pockets in heads. https://www.summitracing.com/parts/c...make/chevrolet
This winter will be new heads and headers. I'm going to keep these on my watch list and save my pennies.
Thanks again.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Using my secret formula involving CFM, RPMs, tire width and the like, a rough calculation would be a burnout tire marks measurement of 2.8 ft shorter.
Last edited by HeadsU.P.; Oct 8, 2017 at 06:36 PM.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
1.94 intakes instead of 2.02. Not much difference in a 350, port velocity will be up, better a/f mixture, better throttle response at low to midrange in a 350, They will not support 500 HP but Vortecs have the same valve size and there are a ton of vortec head builds making north of 400 HP and some in 383 builds making 450.
