who here races with exhaust manifolds?

sixtynine · #1 01-25-2013, 04:25 PM

Hi - My 69 Chevelle has manifolds and was thinking of getting her to the track BUT.... was interested to see what folks are running ET / MPH wise with stock or ported exhaust manifolds... anyone?

On a side note, my car looks like a stock 396/350 hp car but dyno'd 450hp/530 tq with cast iron GM intake & a Qjet (albeit with dyno headers)...

Postsedan · #2 01-25-2013, 04:29 PM

All the Pure Stock racer run them.... http://www.purestockdrags.com/

Dan

sixtynine · #3 01-25-2013, 04:42 PM

Yeah I know but asked for some advice over there but didn't get any sort of response....

That said, I only want to run low, low 12s... If I could do that with unported manifolds it'd be a bonus.

*Spoke to Greg Gessler and he has zero room to accomodate any further manifolds for porting due to time....

**protree68** · #4 01-25-2013, 05:55 PM

i watched a stock ZL1 on the dyno it made 430 hp with manifolds we tried headers and it was a hole differant animal on the first pull it made 518 hp.i had my manifolds for my car ported by the vorteck pro.

**mockingbird812** · #5 01-28-2013, 01:26 PM

<span style="font-style: italic">.... was interested to see what folks are running ET / MPH wise with stock or ported exhaust manifolds... anyone?</span>

'70 Chevelle LS6/M22/4.56 pure stock rules: 12.2 @ 108 mph

Chevy454 · #6 01-28-2013, 02:30 PM

Been racing Pure Stock since '99...car has ran a best of 11.72 @ 118 so far @ 3700+ lbs...L72/400/4.56 Yenko Camaro.

sixtynine · #7 01-28-2013, 07:41 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Chevy454</div><div class="ubbcode-body">Been racing Pure Stock since '99...car has ran a best of 11.72 @ 118 so far @ 3700+ lbs...L72/400/4.56 Yenko Camaro. </div></div>

Thats a real good mph for manifolds..... Are they untouched or extrude honed or ported?

Chevy454 · #8 01-29-2013, 07:47 PM

Untouched, other than a shot of "Cast Blast" spray paint...

**Ryan1969Chevelle** · #9 01-29-2013, 09:54 PM

Hi fellow Canadian.

Plan to attend PSMCDR in September everyone I have met there has been great, I bet they would share lots of information to help.

Ryan

If you need directions follow me, I will be attending as a spectator again this year.

**Vortecpro** · #10 01-30-2013, 03:22 AM

Protree, its Vortecpro, get it strait.