I have a TBSS intake and am about to buy a set of L92 heads(823). Wanted to make sure they will mate with out any problems.

Are there differant L92 heads? If so what are they. The guy I bought the motor from had L92s on it but wasn't sure if there were more then one type of L92 head.

 

I think I answered my own question. The TBSS intake seems to be the L92 truck intake.

If this is true someone confirming would be awesome! I was in a hurry to solidify a deal on my heads.

 

tbss has 243 heads im pretty sure so it will NOT bolt up to L92 heads.

 

TBSS Intake is Cathedral Port..L92 Truck is Rectangular Port.

 

So they won't work togather.

 

So I should go back to my original plan of port and polishing my 317s.

 

How much you feel like spending?

 

I called livenois and to cnc the 317s it will cost me $1099. I think I will hold off. I have one head started on for the port and polish by hand. I am going to give them a shot.

For a little bit of back story the motor was over 13:1 with the l92s. So I will still have high 12s with the 317s. Later down the road I will have a set cnced or swap to a differant head but that can wait for now.

 

Stock or milled L92's?

 

Stock chamber.

 

243s are a good choice for me correct? How much smaller is the chamber then my 317s. Do they flow much better?

 

The info I could find is they flow nearly identica but the 243 has a smaller chamber. I would be better off to have my head milled slightly. Obviously I have plenty of compression with the stock 317s but for a race/weekend motor why not have more!

 

TBSS intake WILL NOT work with L92/LS3 heads. Totally different port configuration.