Well im in the middle of sourcing parts and finalizing the hot side design and was wondering how much power ported heads are worth on a boosted setup? would it be better to just sell my heads, get some stockers with larger valves and use the money toward something else?

Im planing on running a T76 at 15psi, custom cam, ported intake.

 

Heads will help quite a bit over the stockers I would think.

More air in = more power

If money is tight and you were having trouble getting $$ together for a fuel system or something, then I'd ditch the heads to buy a good fuel system. If you can afford to keep them, then I would. Keep an eye on your CR with those heads though.. chambers are probably around 54cc.

 

How much power do you want to make? What cubic inch engine?

 

I'm going to tell you to CC the heads, then decide from there. My heads were milled a couple times and I came up with a number between 52-53cc. On my motor it would have required a -40 dish to get the compression to 8.6 around where I wanted it. I'm selling my heads and getting trickflows with 62cc chambers that will allow me to run an off the shelf wiseco piston with -28 dish to put me at 8.8. My heads right now flow better than the off the shelf trickflows, but I have to make the sacrifice to save money on pistons. Off the shelf pistons are 680 compared to the 800 customs.

 

ya I havent had the chambers checked,I need to get a DIY kit and check them. as for the fuel, I thkn my walbro should be fine and ill probably just swap someone my 30lb inj for some 36 or 42's

 

Im looking around 650 on stock displacement. I may go 355 but thats it.

Good point, but TFS are alot more than the $120 difference between the pistons.

 

Get 60# injectors... do it right the first time. 42's are too small, especially if you want to run 15psi with a T76.

 

Ok thanks for the help! anyone want to trade

 

There are alot of people moving toward 9.0-9.5 CR and using methanol injection. The small combustion chambers on LT1 heads make excellent power and don't require as much timing as other heads. I would keep them.

 

Well that was comparing weisco to diamond, JE wanted $900. These are all the same 2618 material. And I'm selling my LE2s with cam for 1300 and buying TFS for 1360 or something assembled from Victory, plus there is room to grow with porting on the TFS.

 

Ok that makes sense now. I'll be using Diamond on this build. thanks for the help guys, Ill be sticking with the LE3's provided they havent been milled and I can get my pistons to work with them.

 

Hell, I needed to get 86lb injectors on my setup with the same turbo and 15PSI. Isn't here a calculator for that? It's been so long since I was at the planning stage that I forgot what it was!

 

A local LSX here has pushed his 60# to 800rwhp... granted his fuel pressure is high. 60#'s should have no problem with 700rwhp... and everybody wants a set of 60's, so he can resell and not lose any money.

 

deka 60s here.

If you are thinking about it, stock castings can be opened up to @ 60cc give or take. Mine have been decked in the past and we got them to 59.5cc for $250. Figured it was worth it to keep my ported heads that already had money in them.

 

Say I could get to 60cc what does that do for me on piston selection? off the shelf?