Thread: head upgrade disappointment

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aluminum head vs iron head can come in to play for heat and the cr as you can run a point more with aluminum heads. the point i was making is you can buy a good name brand head with good flow number and can have better port velocity then a china aluminum head . head that volume is 210 that tells nothing other then the cc of port volume to fill it not low lift numbers or velocity at low lift. or how the wet flow of the head is . you can not just assume thing like head CC are what are posted from maker or flow numbers. as some valve s are dish some are not. this plays in to the over all cc of the head chamber . with engine s with to big of head s . you can do two things if you keep the heads move up the power band and buy parts for it to make power . or try to build more low end by using more cr can help to a point a cam shorter duration re work port runners is alot of work . dual plane intake and a EX with a cross pipe like a X pipe. buying just a 170 to 180 runner head will help if there good heads stock gm heads or the pbm thunder heads are a good way to go .360 cid engine the big head can work. your weigth is low but thats if heads are good. but your game plan needs a new attack angle

Thats good info guys, will have a look at different cams and make some long tube headers, sounds like you dont like chinese heads then!(its all I could afford at the moment) I wanted aluminium to reduce some of the weight and of course being able to run unleaded fuel.
Thanks again!

Originally Posted by dave350v8

Thats good info guys, will have a look at different cams and make some long tube headers, sounds like you dont like chinese heads then!(its all I could afford at the moment) I wanted aluminium to reduce some of the weight and of course being able to run unleaded fuel.
Thanks again!

Nothing wrong with the castings from what I've seen of them! Local race engine shop here uses the Pro Comp castings, buys them bare, does the machine work and installs first rate components in them. Some of his sets are making some very strong power numbers!!!! One member on here has a set, ask Roger how his perform!

Also, from what Sehr has said about these castings, the flow rates are about as close to advertised as most of the other aluminum heads in "as cast" condition.... A bit of time on the flow bench will improve any head!!!!!

Originally Posted by Dave Severson

Nothing wrong with the castings from what I've seen of them! Local race engine shop here uses the Pro Comp castings, buys them bare, does the machine work and installs first rate components in them. Some of his sets are making some very strong power numbers!!!! One member on here has a set, ask Roger how his perform!

Also, from what Sehr has said about these castings, the flow rates are about as close to advertised as most of the other aluminum heads in "as cast" condition.... A bit of time on the flow bench will improve any head!!!!!

Thanks Dave that has reassured me,will try some of the ideas people have mentioned! Im also going to re jet my holley now with the new heads.
Might even try a 650 double pumper which is sitting on a shelf.
Thanks again

Originally Posted by dave350v8

Thanks Dave that has reassured me,will try some of the ideas people have mentioned!

You might also want to PM Richard (Techinspector) about your performance issues, he always has some good ideas on camshafts that can optimize the performance of the heads!

Thanks Dave will do! Techinspector has given me great information in the Past....