mike93eh

i have a greddy kitted z6 on 10psi. the downpipe on it is 2" and the rest of my exhaust is 2.5"

what kind of effect would i have if i got kteller's 2.5" greddy downpipe?

zeroice

should spool a little faster maybe a few hps

Iceman05

i like mine with a 3" exhaust, better spool, more top end

mike93eh

its a 15g, it already spools pretty damn quick. you say it will help with the top end?

mike93eh

anyone have more insight?

JFK78

I had a custom 2.5" dp made for my greddy kit. It does spool a little quicker, and is a lot louder. Other than that it didn't seem to do anything for me.

At 15 psi I trapped 115mph with the stock 2" dp.

After the 2.5" dp, it still trapped 115 mph.

It's possible it makes a little more power, but didn't seem worth it to me.

mike93eh

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JFK78 &raquo;</TD></TR><TR><TD CLASS="quote">I had a custom 2.5" dp made for my greddy kit. It does spool a little quicker, and is a lot louder. Other than that it didn't seem to do anything for me.

At 15 psi I trapped 115mph with the stock 2" dp.

After the 2.5" dp, it still trapped 115 mph.

It's possible it makes a little more power, but didn't seem worth it to me.</TD></TR></TABLE>

wow, 12.6 on 9.5 psi greddy kit!

you are running 15psi on the greddy kit now? is it pretty much maxed out? im planning on turning mine up as far as it will go. how much power you making at 15psi? are you starting to lose power?

mike93boost

will switching from a 2" to 2.5" downpipe affect my tune? will the boost rise a little?