Has ANYONE seen a gain from going from a 3" to a 3 1/2" DP?

[NEARING]

In a 10 sec or slower car?

They do look cool but heard from a good source that unless you're running 9's it's money in the tiolet.

 

[Dusty Bradford]

Nope. 10.60 with 3" and 10.60 with 3.5" in 3650# car. Turbo even had a Q trim.

It did pick up a tenth switching from a stock plenum and powerplate to a PTE plenum and powerplate.

 

[tminer]

The headers and exhaust would seem to be important factors in this discussion.

Tom

 

[NJTurbo]

I have not, tried both. I think you would notice a difference if you already had headers, larger turbo, ported heads etc. Just my 2 cents....