intake exhast ports 3100 3.1

[IBuiltMine-o1oo]

are the intake and exhast ports bigger on 3100 heads then 3100 heads?

[Vegeta]

3100 has D shaped exhaust ports that flow better than 3.1. 3100 intake ports are wider and less tall and also flow better than 3.1.

[Regalblue]

You want 00+ 3100.

[IBuiltMine-o1oo]

i have a 97 cutty, the heads are still improved in 2000?

im eventually wanting to turbo this engine, and i want it to hold up forever...like OEM.

Thanks for the answers!

[Regalblue]

Top is 00+

Bottom is pre 2000

 

Bottom is 00+ & top is my stock 98.

[SleeperRed90TGp]

i have a 97 cutty, the heads are still improved in 2000?

im eventually wanting to turbo this engine, and i want it to hold up forever...like OEM.

Thanks for the answers!

 

Yes, the intake valve is .040 bigger. long with the rest that was said.

 

Jud

[IBuiltMine-o1oo]

WOW! Thanks guys!

[f_399]

are they inter-changable

[IBuiltMine-o1oo]

i think if you want to interchange just the intake, you have to portmatch the heads, so you mayaswell change the heads to get tehm to the bigger size all the way through, and the bigger valves, also. Im looking for a 2k or newer montana engine to put in my Olds.

[SleeperRed90TGp]

The only intake that are interchangable is the late 3100 3400 and 3500 1999 up. You have to use the UIM, LIM and the heads with each family of motors.

 

You can't put a 1999 up on a pre 1999 and visa versa unless you change everything.

 

Here's what I went through to do the swap.

http://www.netavalanche.com/tgp/viewtopic.php?t=2604

 

Jud