David Neibert
SCCoA Admin
It's been a couple months since installing the longtube headers and larger exhaust system and I'm finally at at point that I'm ready to put it on the dyno and see if it makes any additional power. I've got the dyno reserved for 4:30 this afternoon and Rod is supposed to come along to video it, mainly so you guys can hear the new exhaust system.
Prior to the changes it usually pulled around 425 rwhp & 410 rwtq and the best it's done is 435 rwhp & 413 rwtq as shown on the chart below.
Changes since this pull was made are as follows.
WAS: Kooks med length headers, no cats, 2.5" downpipes, 2.5" dual inlet by 3" single outlet Magnaflow resanotor, 3" single pipe to dual 2.5" Dynomax mufflers. Stock early style fuel tank and stock driveshaft. Road and dyno tuned by Dave Dalke.
IS: Kooks longtube headers w/3" collectors, no cats, dual 3" mandrel bent stainless Y into 3.5" inlet/outlet Maganaflow resonator, 3.5" single to near diff, they Y to dual 3" open chamber Magnaflow mufflers. Late model fuel tank and aluminum driveshaft. Tune adjusted long distance by Dave Dalke using data from scanner and input from me.
Pics of old and new exhaust in this thread.
http://www.sccoa.com/forums/showthread.php?t=95404&highlight=kooks+headers
Anyhow...I have no idea if it's going to add or lose power and thought it might be fun for people to make some educated guesses and see who gets the numbers closest to what it actually pulls this afternoon.
So post your guesses.
David
PS: If A/F ratio looks okay on motor, I'll also make a pull with about a 100 HP shot of nitrous.
Prior to the changes it usually pulled around 425 rwhp & 410 rwtq and the best it's done is 435 rwhp & 413 rwtq as shown on the chart below.
Changes since this pull was made are as follows.
WAS: Kooks med length headers, no cats, 2.5" downpipes, 2.5" dual inlet by 3" single outlet Magnaflow resanotor, 3" single pipe to dual 2.5" Dynomax mufflers. Stock early style fuel tank and stock driveshaft. Road and dyno tuned by Dave Dalke.
IS: Kooks longtube headers w/3" collectors, no cats, dual 3" mandrel bent stainless Y into 3.5" inlet/outlet Maganaflow resonator, 3.5" single to near diff, they Y to dual 3" open chamber Magnaflow mufflers. Late model fuel tank and aluminum driveshaft. Tune adjusted long distance by Dave Dalke using data from scanner and input from me.
Pics of old and new exhaust in this thread.
http://www.sccoa.com/forums/showthread.php?t=95404&highlight=kooks+headers
Anyhow...I have no idea if it's going to add or lose power and thought it might be fun for people to make some educated guesses and see who gets the numbers closest to what it actually pulls this afternoon.
So post your guesses.
David
PS: If A/F ratio looks okay on motor, I'll also make a pull with about a 100 HP shot of nitrous.
but it should be 550+HP
