Hello. I am reconditioning my stock 91 Firebird Formula 350tpi cylinder heads (1.94 &1.5) .
My plan is : new 2.02 & 1.6 valves, complete professional head work with pocket porting, Edel tes headers.
Will better flowing heads work with stock 90-92 Map/Speed density system?
My Budget doesn´t allow custom proms or aftermarket dfis right
now.
Am i asking for trouble :running lean at higher rpm,rough idle ?
Should i just rebuild my heads with stock valves?

 

With SD cars, you need to have the eprom reprogrammed to get the most out of your mods. In fact, even a bone stock L98 will benefit from reprogramming the eprom.

I would not waste my time on a "custom" eprom. I would get the equipment and learn to burn your own eproms. It's a lot easier than you think and the cost does not need to be expensive either.

 

Oh yeah, IF you did nothing to the eprom, it would probalby run reasonably well. It's cam changes that causes the most problems.

But, to get max performance; learn to burn your own eproms.

 

Thank you for your reply.