n20stroker

Hey guys looking for some help building my next setup. I have a 402 iron block out of a friends car that took out a piston due to broken valve spring. I'm going to have it built over winter break. I'm not sure on what do do with heads at the moment. I have a chance to buy my buddies TF 235 with ls3 valves just need to replace broken valve and springs and little repair work to deck or should I do a set of as cast TF 220 or l92/lsa heads. Current setup is 346 with 317 heads and A&A kit vortech T trim blower. Would like to keep my intake,fuel rails etc but also wanna make power. Any input would be great

robert miller

A good set of 243 heads will do about the same here. But on a 402 ci motor dont think I would want to go over a 225 TF head.

I made over 1,k rwhp on my old set up of a ls2 402 motor with 225 TF heads..

n20stroker

Thanks Robert for input. Only reason I was thinking Tf 235 is cause I already have the set of heads and I can have them. I just to pay to repair the one head.

Arun@Dasilvamotorsports

I'm a big fan of the LSA heads with a CNC port but you would have to change the intake to a LS3.

I will be using them again on my new setup.

For the money they can't be beat.

Proace4

If I had to start over these are the heads I would run as well. Jeff has a build thread in the C6 FI section where he just made over 1k with LSA heads on a 376ci motor I believe.

I have a pair of old ETP 240 heads on my 402 now. They have worked pretty well so far.

robert miller

Arun will not lead you wrong. Great car guy and for sure knows his way around these cars. Some times big is always not the best way to go it can hurt the perf

Proace4

I agree. All the questions he has answered and the parts he has sold me... Helped me make 1k with my YSi.

Rkreigh

Arun, do you remember a while back a run of CNC LSA heads (I seem to remember it was a gent named charlie that did the port design)

they were very affordable

currently looking for a good deal on ported LSAs

Arun@Dasilvamotorsports

PM sent

inspector12

Man I bet there isn't a ton to be gained on any head on a FI application. I have used a lot of different heads and I've used the TFS235's and they a Great head if your buddy is give you a deal then its a great option IMO! I first thought you already owned the TFS's but I see your buddy is offering them to you. GL!

o1Z0sick

If I had to do it over again I would have gone with square ls3 ports and would have the option of eaton tvs blowers like the heartbeat or Zr1 ls9. Having cathedral ports im pretty much stuck with centrifugal blowers. However i couldn't find a good set of pedestal roller rockers for the ls3 like yella terra and i really needed roller rockers for the tfs valve angle.

I had tfs235s on a f1a 416 and that made 800rwhp at 14psi but the mid range was what was amazing. The nitrous port exhaust flow damn near 300cfm. Now i have tfs 245 on a 427 and same boost and make 850rwhp. I love the mid range on these heads and all my other parts seem to compliment the flat torque curve.