Ive got a iron block, 4.0 stroker (409"), 238/248 @ 112, all the bolt ons (headers, harland rockers, ls6 intake, 11.5:1 compression).

Ive got a new set of TEA 1.5's i was going to use on the motor since they save me about a $1500 over TEA stg 3's.

Has anyone ever seen any dyno sheets of these smaller heads on a big inch stroker and if it worked well?? Id like to see 450-475 through the th350 minimum. If its not enough head, im going to have to postpone the project till i can afford the bigger heads.

 

To take advantage of the larger bore, the chambers must be modified to unshroud the valves.

 

A big bore with Stg 2 TEA 5.3s

https://ls1tech.com/forums/dynamometer-results-comparisons/154755-396-stroker-dyno-s-504-481-a.html

 

thanks for the link 93polo

 

If you're gonna put that much $$ into a motor, spend the MOST you can on the heads and have a custom ground cam chosen to suit your setup.

 

Ding...Ding...Ding.

 

yep, strokers need different intake and exhaust port volumes than a standard TEA 1.5 head and also need combustion chamber work as well.

TEA has heads for bigger cube combos AFAIK.

 

I would highly recommend TEA's 6.0L port design for your motor. They flow SICK #'s, and will work well on a large bore. 5.3L heads DO NOT like large bores....


josh

 

I think TEA heads are an outstanding choice for your project but I would go with the 6.0 head or an LS6 TEA head Stage 2 or higher with at least 2.05 valves. TEA 1.5's have 2.02's which are right the mark for a 3.9 bore. A 4.0 inch bore really should have 2.08 intake valve for best results.

Going bigger than a 2.02 will probably require a Stage 2 or higher head. Likewise, if your play to spray I think the more durable aftermarket Ferrea valve in the Stage 2 and up heads would be a good choice IMO. Also if your spraying ask TEA about their NOS exhaust port. BTW their NOS port works pretty well for NA stuff too in many applications.