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Old 04-27-2014, 06:22 PM
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Goodwrench 350 with pro comp heads

Just wondering how well or even if this setup would work. I have a perfect running low mileage goodwrench 350 in my car. Edelbrock performer plus cam, rpm Intake and ram horn manifolds. It runs great but I would like more power. How would it perform with the very mild edelbrock cam if I simply bolted a set of complete procomp heads on with the engine in the car? It is mostly just a cruiser and I do t expect crazy power but I thought the higher compression and better flowing heads would still make a big difference over the 76cc snoggers. Thanks

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Old 04-27-2014, 06:39 PM
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50-60 hp gain, another 20 with a switch to long tube headers.

Assault heads are a better low cost alternative to ProComps
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Old 04-27-2014, 06:48 PM
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i second the assualt heads , same price but a much better casting

mine flowed 267 cfm out of the box , thats leaps and bounds better then the procomps

i had mine cleane dup just a lil bit and they now flow much closer to 300cfm
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Old 04-27-2014, 08:02 PM
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Alright thanks, picking up around 50 hp sounds like it would be worthwhile. I have not heard about assault heads but I will check into them. I can get a great deal on a set of the procomps right now but will do more research.
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Old 04-27-2014, 08:14 PM
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Originally Posted by lt1tyrell View Post
Alright thanks, picking up around 50 hp sounds like it would be worthwhile. I have not heard about assault heads but I will check into them. I can get a great deal on a set of the procomps right now but will do more research.
SBC Chevy 200cc Bare Aluminum Cylinder Heads 64cc Straight Plug Small Block 350 | eBay

they come bare with angles or stright plugs , or for 200-250 more u can get them completly assembled
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Old 04-27-2014, 09:04 PM
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SBC Chevy 200cc Bare Aluminum Cylinder Heads 64cc Straight Plug Small Block 350 | eBay

they come bare with angles or stright plugs , or for 200-250 more u can get them completly assembled
I would suggest straight plugs, as often times angle plugs clash with standard headers, forcing you to get much more expensive "race" headers, or bash the "chit" out of a standard set with a hammer.
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Old 04-28-2014, 04:20 AM
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The Assaults are an improvement over the ProComp.I wish they were also available w/ a smaller intake port also.A 200cc could be a little large for a stockish 350 with higher gears.Lower RPM operation could be a lil soggy,but,still should be way better than what you have now.
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Old 04-28-2014, 05:18 AM
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The Assaults are an improvement over the ProComp.I wish they were also available w/ a smaller intake port also.A 200cc could be a little large for a stockish 350 with higher gears.Lower RPM operation could be a lil soggy,but,still should be way better than what you have now.
200cc ports are not as bad as people think off idle. Perhaps less than optimal but still not bad- especially when they have a much improved shape when compared to most stock ports.
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Old 04-28-2014, 06:51 AM
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200cc ports are not as bad as people think off idle. Perhaps less than optimal but still not bad- especially when they have a much improved shape when compared to most stock ports.
I'm sure they will be a big improvement over what he has now.
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Old 04-28-2014, 08:57 AM
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Originally Posted by Project89 View Post
i second the assualt heads , same price but a much better casting

mine flowed 267 cfm out of the box , thats leaps and bounds better then the procomps

i had mine cleane dup just a lil bit and they now flow much closer to 300cfm
IIRC from your thread Project89,didn't you have to use a Vortec style intake with the Assaults with the raised runners to get a good seal?
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Old 04-28-2014, 10:55 AM
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Originally Posted by lt1tyrell View Post
Just wondering how well or even if this setup would work. I have a perfect running low mileage goodwrench 350 in my car. Edelbrock performer plus cam, rpm Intake and ram horn manifolds. It runs great but I would like more power. How would it perform with the very mild edelbrock cam if I simply bolted a set of complete procomp heads on with the engine in the car? It is mostly just a cruiser and I do t expect crazy power but I thought the higher compression and better flowing heads would still make a big difference over the 76cc snoggers. Thanks
ProComps are fine as these low cost import heads go. Big problem is people who buy the head with street components; valves, retainers, locks, and springs then put them on an engine with a big cam that busts these parts and ProComp takes the blame.

Car Craft did a shoot out on low cost heads some time ago, they used Speedway's FloTec which like the KJM Assault are pretty similar to the ProComp. The FloTec did pretty comparable to an out of the box iron L31 Vortec and ran pretty close to the company it was keeping in the test. see this link <<< Eight Budget Small Block Chevy Heads Tested - Car Craft Magazine >>>.

Aluminum heads pull heat out faster than cast iron so expect to add a hotter thermostat to your set of tuning tricks to slow that down a little to keep more heat in the combustion chamber where it will push the piston harder.

Bogie
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Old 04-28-2014, 12:30 PM
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Originally Posted by oldbogie View Post
ProComps are fine as these low cost import heads go. Big problem is people who buy the head with street components; valves, retainers, locks, and springs then put them on an engine with a big cam that busts these parts and ProComp takes the blame.

Car Craft did a shoot out on low cost heads some time ago, they used Speedway's FloTec which like the KJM Assault are pretty similar to the ProComp. The FloTec did pretty comparable to an out of the box iron L31 Vortec and ran pretty close to the company it was keeping in the test. see this link <<< Eight Budget Small Block Chevy Heads Tested - Car Craft Magazine >>>.

Aluminum heads pull heat out faster than cast iron so expect to add a hotter thermostat to your set of tuning tricks to slow that down a little to keep more heat in the combustion chamber where it will push the piston harder.

Bogie
or add a half to a full point of compression to help equalize the playing field.
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Old 04-28-2014, 12:33 PM
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The OP, Lt1tyrell, will be adding 1.2 points of compression just by buying the heads with 64cc chambers, which would be the way to go.
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Old 04-28-2014, 01:27 PM
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. Another budget choice would be a set of used/takeout ZZX-ZZ4/'86-'91 Vette -113 aluminum heads with 58cc chambers... bumping compression ratio on up to about 9.5:1... an even better match to the PerformerPlus cam... and still good to about 375-385HP max... and uses current intake manifold...
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Old 04-28-2014, 02:31 PM
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Originally Posted by jokerZ71 View Post
IIRC from your thread Project89,didn't you have to use a Vortec style intake with the Assaults with the raised runners to get a good seal?

stock manifolds will not seal , i ended up using a holley stealth ram intake with the standard bolt pattern. i also know that the edelbrock peformer , rpm , and single plane manifolds etc, will seal up on those heads

just about any good aftermarket intake with a standard pattern should work just fine
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