Does your exhaust choke your engine?

[Karl]

Also in that article they removed the outside rear view mirrors for some extra mph.

[Locobob]

Originally Posted by LGAFF

Ok apparently lingenfelter got busted by the Road and Track police; they had L98 cats on the car so it looked to comply with the rules, they got caught with a bypass switch that went to open headers. So R&T made them run it with the L98 in use at WOT. Busted!


The following week they ran the same car with high flow cats and still hit the 218!

I could see how L98 cats would totally choke that exhaust... they were designed for a car with 250hp... um yeah not going to work so well.

[batchman]

I got the idea on this site for take-off z06 cats. Haven't found a set yet but they look like the right answer for me. I'll take the 1-2 hp hit to keep from stinking up the grid while warming the engine up.

Cheers,
- Jeff

[Hog]

Originally Posted by batchman

I got the idea on this site for take-off z06 cats. Haven't found a set yet but they look like the right answer for me. I'll take the 1-2 hp hit to keep from stinking up the grid while warming the engine up.

Cheers,
- Jeff

Assuming LS7 cats, and yes catkes vehicles do stink.

[Bob Eyres]

Originally Posted by Hog

catkes vehicles do stink.

Hey, I resent that. Actually I do feel a little guilty for having no cats, but the sniffer says it's relatively clean and (legal) once it's warmed up.

I only had a conversation with John Lingenfelter one time, at Beech Bend. I asked him whether any back pressure in the exhaust was beneficial. He said "no, anything you can do to opened it up and let it breathe is good for more power". He implied that the LT5 really responded to a free flowing exhaust system. I followed that advice, and increased the 1/4 mi. trap speed by more than 7mph, (110-to-117mph).

[Paul Workman]

Originally Posted by Bob Eyres

Hey, I resent that. Actually I do feel a little guilty for having no cats, but the sniffer says it's relatively clean and (legal) once it's warmed up.

I only had a conversation with John Lingenfelter one time, at Beech Bend. I asked him whether any back pressure in the exhaust was beneficial. He said "no, anything you can do to opened it up and let it breathe is good for more power". He implied that the LT5 really responded to a free flowing exhaust system. I followed that advice, and increased the 1/4 mi. trap speed by more than 7mph, (110-to-117mph).

So... What do you have now?

I'll show you mine if you show me yours (exhaust, you perv!)

SW 3" throughout, except for MF mufflers. Those puppies choke down from 3" to about 2-1/2" before splitting into two 1-3/4 outlet tubes...

The Dynamax 17228s are what I want to install, along with the NPPs for next spring driving season.

[Bob Eyres]

Originally Posted by Paul Workman

So... What do you have now?

Listed in the sig. An old style B&B system, no cats, Watson headers. Way loud, but I'm used to it.

[XfireZ51]

Originally Posted by Bob Eyres

Listed in the sig. An old style B&B system, no cats, Watson headers. Way loud, but I'm used to it.

Bob,

By that you mean you're going deaf.

[Karl]

Originally Posted by Bob Eyres

Listed in the sig. An old style B&B system, no cats, Watson headers. Way loud, but I'm used to it.

How does the car smell without the catalytic converters?

[-=Jeff=-]

Originally Posted by pushrod-v8

How does the car smell without the catalytic converters?

That is a matter of personal preference, I think. my 89 was not bad, but I have cats on my 90 Z