Thread: Trannyman, do you do Head work?

those look perddy!!!

Dont worry, you are covered!

Those heads look really good Dave!

As for AFR heads, thinking about those myself for my LT1 build. I figure those heads with the LT4 Hot Cam would be a nice addition to the Procharger. What do you think? Summit, and Jegs both sell AFR heads, and you can buy them from Ebay though a factory direct vendor too. But I am planning on buying mine through Summit.

~F~

Thanks man! AFR is THE way to go man, trust me! I think the hotcam will be plenty with a procharger along with it unless you would rather go with a good blower cam from comp or someone, but even if you just get the engine fired up with no supercharger you will have tons of power across the powerband with that cam.

The engine will be fired up with the blower installed. Can you recommend a good blower cam from COMP? I'm just thinking of getting the hot cam, and rockers, and porting and polishing the intake manifold, and getting a bigger throttle body and headers and thats that.

~F~

LoL Wow is there anything you don't do well? This guy is awesome.

Larger valves work fine in L67 heads. The later series 3 engines' valves are slightly larger than the older ones and will work just fine but the valve seats will need to be ground to match. There are other options out there for valves also if you are looking for larger ones.

Damnit. I wish I had spare cash. Those heads look AWESOME.

Stock VS Stock, the intake will marginally flow better and they have a larger valve. The L32 heads come with the larger intake valve and is a benifit over an earlier head with a slightly smaller valve and saves you the cost of buying these or other larger valves. The exhaust port isnt a concern since it will be ported and will make good gains with stock size valves and even better gains with larger valves. Without port work adding larger valves will generally gain nothing at all and in some cases can hurt airflow though the 3800 heads dont have a huge selection of valve sizes and the larger ones are not much larger than the stock ones be it L67 or L32. Since the L32 heads came with the slightly larger valve the seat was ground to accomodate for this during assembly and when they are cut they are also recessed below the valve seat to blend into the port. Other than the cost of the valve there is no more money involved as a valve job is performed on all ported heads after they are finished to ensure the seats are true and have a nice finish on them and at this time if installing slightly larger valves the changes will be made and good valve seat cutters will radius the larger diameter down into the area below the valve for enhanced flow.

Depending on the exhaust system on your car you will hear a little bit more exhaust note. An actual HP gain number is hard to say because there are an aweful lot of variables with mods plus the fact that the car will need to have a good tune to get the most out of them, but I would say an easy 15-30 hp. Any aftermarket camshaft that is larger than stock will definately take advantage of ported heads which will flow better at higher lift #s than stock castings.