243 heads
just to start a topic here...

been seeing some stock 243 heads for sale lately for decent prices. how much of a gain could u get just from having them?

the setup im trying to get is just cam, heads, and intake for now.... i "may" get a bigger cam sometime. just not sure the 226/228 is what is to my likings.

You could pick up a set of 243's, then remove the casting boss on the intake, then massage the bowls, and make a nice improvement.
Little cost involvement, and a nice increase.
What plans on the intake?

never heard of a casting boss on the intake or massage the bowls before... how much work does that involve and cost?

the intake.. not quite sure yet, was debating on the fast or the one pete is looking at. so thats still not for sure yet.

The casting boss is something that is always removed during porting.
This work can be done in a matter of hours.
As for the intake, the Street Warrior (the one Pete wants) is a great intake.
If you didn't want to invest as much money, I was going to recommend that you have the factory ported by LS2Protworks.

i can get the ls1 intake ported by ls2portworks? ls2 intake wont work with a set of 241 heads will they, gotta do 243 heads and ls2 intake. do u need to do anything with the injectors?

John remember we have the LS6 intake manifold on our cars. there is a Big difference between the LS1 and LS6 manifold. A ported LS6 Should Flow very nice. Cory from LS2portworks gave me a price quote, i'll have to try to look for it in my emails.

Answered in the order they were asked....

i can get the ls1 intake ported by ls2portworks?

Yes you can. LS2portworks is just the name of the company.... But the factory intake on 04 GTO's is a LS6, and it can be ported there also.

ls2 intake wont work with a set of 241 heads will they, gotta do 243 heads and ls2 intake.

No, you would not have to change to 243's just to run a LS2 intake. You can use any cathedral port intake on any cathedral port head.... But I would stick with the factory LS6 intake over the LS2. The LS6 flows better.

do u need to do anything with the injectors?

I am not sure if you are going to use a LS2 intake. I am not sure how the injectors fit.... I think you would have to change your fuel rail....

But if you are asking just because the intake is ported, then no.... You will be just fine.

I would stick with the LS6. It flows the same as the FAST up until 4k RPM's on a 346 c.i. block. They are a superior intake compared to the LS2. LS2 is one of the worst intakes flow wise GM has made for the Gen engines.
I remember reading formato stating that LS6 gains are minimal with porting. He is pretty respected in the porting business, so I would look into that further before putting money in a port job IMO.

i see. ill have to give them a call about porting the intake then and see what they say. i could just get a set of ported 243's on there for now.

just for shits.. how big of a cam could i go and still be streetable? would 230/232 .6xx/.6xx 112lsa be ok?

i figured the more lift u have the better it will be in the higher rpm range.

Well the plans for the car is too keep it streetable and take it to the strip as well... so id say 70% street and 30% strip. but firstly i need to replace the clutch with a southbend stage 2, and go from there.

i thought u had a stock shifter for some reason oops lol well now replace the clutch and were racing whatever mods you have by then ... better see 12's first pass :roll: