Ill second what these guys are saying about AFRs. From what I have seen, they are pretty subpar in ported form for what you pay.

IF you want them, I suggest you order a bare casting and send it off to someplace who will design the port for you. Thats what I did and

 

Ok so what im getting is AFR's really arent that great for the moeny does anyone have links to people that make a good lt4 casting head for boosting or someone that can lead me in that direction?

 

Bare casting trick flows and have them ported. It is the most economical right now because LT4 intakes arent being made anymore. You will still have another 1500+ into them after all said and done.

http://store.summitracing.com/partde...7&autoview=sku

 

the afr heads arnt bad, there portwork isnt that great though. if your going to get afrs, get someone else to port them.

700rwhp can be done with most any of the heads mentioned in this thred.

also what is your budget? thats going to play a big factor too.

brook

 

Really this discontinued the lt4 intake....damn well im guessing that there is no noticble diffrence between the lt4 and lt1 castings at this point? if so can anyone get me an lt4 intake and budget ist really a problem i willing to spend what it takes to get it done and get it done right although getting it done right and saving money wouldent hurt also i had chosen 64 cc combustion chambers but everyone seems to be leaning to 62 why is this?

 

We just run a set of TFS heads with a Single Plane intake.

Bret

 

TFS never heard of em got a link? and single plane intake do you mean an intake equipped for a monoblade throttle body? and again why the 62 cc combustion chambers and im guessing there is really no diffrence between the lt4 and lt1 castings and intakes once they both have been worked over?

 

The only difference between the LT1 and the LT4 intakes is that the LT4 has more meat at the top of each runner, so it can be ported to match the taller LT4 head runners. From the factory, the LT1 and LT4 intake manifold runners are virtually identical, and mismatched to the LT4 heads.

 

TFS is Trick Flow,do a google search.
62CC chambers to cut down the compression for a blower.

 

alright because i figured a 64 cc combustion chamber but 62? i cant seem to find the casting in 64 looks like id hafta go back to the drawing board for piston depth with a -25 cc dish does anyone have the numbers of any good porting shops thatll do the bare castings for me and what valves springs and rockers should i go with?

 

They will probably be 64 after the chambers are worked.
Get in touch with Loyd Elliot for the head work, he is a supporting board member.

 

Alright thanks

 

Yeah thats about the best thing you can do since it sounds like to need a good amount of help here.

Bret

 

I just like checking and double whecking why spend all the that money when i can get a better head? i just like to get the most out of my dollar sorry for all the repetitve questions i just wanna do this the right way and educate myself as much as i can on this in the process

 

i have a set of heads for sale that will outflow any ltx style head.

email me if interested