Head choices..
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Teching In
Joined: May 2014
Posts: 5
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Head choices.. Im in the process of building a 403cid for boost (turbo). However, Im stuck on head choices:
PRC 2.5 6.0 head - I like it but with a boosted app Id like to have 356 material and a thicker deck
PRC 225 - I was going to buy these, however after talking to TSP today, the rep said they do not offer porting option for this head if i wanted to sent it back in later down the road.
TFS 220 as cast - (awaiting a call back from TEA)
This is a complete new build to me so I have zero cores to send off to have worked or ported. Id like to shoot for 900rwhp with this motor on a turbonetics y2k 80mm..cam is 230/234 @ .50 with .625 lift..
PRC 2.5 6.0 head - I like it but with a boosted app Id like to have 356 material and a thicker deck
PRC 225 - I was going to buy these, however after talking to TSP today, the rep said they do not offer porting option for this head if i wanted to sent it back in later down the road.
TFS 220 as cast - (awaiting a call back from TEA)
This is a complete new build to me so I have zero cores to send off to have worked or ported. Id like to shoot for 900rwhp with this motor on a turbonetics y2k 80mm..cam is 230/234 @ .50 with .625 lift..
Honestly, I'd look into the LSA heads with a nice valvejob for that setup. They are setup for boost and flow plenty for a turbo setup.
Those other heads are great, but they are expensive and make more sense on N/A setups looking for good efficiency and velocity.
Those other heads are great, but they are expensive and make more sense on N/A setups looking for good efficiency and velocity.
Of the options you've posted, the TFS 220cc heads are the best option. If you can step up you budget some, got with some TFS 235cc heads. The guys telling you that the cathedral head isn't going to be better than a LS3 style head for boost have it wrong. If you go over to the FI section, you'll see tons of guys making crazy power and laying down super fast ET's with cathedral headed setups. I'll look, but I'm pretty sure the one of the fastest guys on here is running TFS 220cc heads.
Staging Lane
Joined: Dec 2014
Posts: 97
Likes: 0
From: Mobile, AL
Most of the heads listed are really good for N/A set up. I wouldn't want high compression right out of the box. The 317 cast heads and L92 heads should keep the compression low and would be good for boost. I am not sure how much it would cost to port them. Might be a cheaper option but not necessarily the best one.
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Check out this thread. This guy is using 799 casting cathedral heads. You tell to that cathedral heads won't get the job done.
https://ls1tech.com/forums/forced-in...d-falls-2.html
https://ls1tech.com/forums/forced-in...d-falls-2.html
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If you got the TFS 220cc head route, hit up Brian Tooley. He'll give you the best deal possible on them, and he can even do some touch up work to the heads if that's something you'd be interested in. He can also make sure to set the heads up with the appropriate valvetrain for boost.
TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
Best Cathedral for 4.0"+ Bore & 4.0 Stroke.
MMS 235 with NFI Exhaust Port Followed by TFS235 with Nitrous
Exhaust Port. Both of these are PREMIUM Priced heads, however
With thicker decks, and great flowing E/I Ratios will make
Huge power with small/medium sized cam (for a 400"+ Engine)
At lower Boost and less Excess heat.
Just my .02
MMS 235 with NFI Exhaust Port Followed by TFS235 with Nitrous
Exhaust Port. Both of these are PREMIUM Priced heads, however
With thicker decks, and great flowing E/I Ratios will make
Huge power with small/medium sized cam (for a 400"+ Engine)
At lower Boost and less Excess heat.
Just my .02
