[oldman]

ment X pipe, I'm old...
I think the round sections are some sort of flex joint, I never looked at them carefully. I can't see how a resonator would work that short in length, a resonator is long to clip the peeks off the sound wave at various harmonics. A short resonator would just allow the waves to pass through at the low points.... basically useless.

The dyno shows about 10 HP, 10 ft /lbs across the board. It is posted on other page. I'm only doing things that will increase the midrange as you know 1st gear and really 2nd are very long pulls. I hate the gear ratio on the m6 trans, great for autoX, needs to be 20% steeper for a true street fighter gear.

[RuthleSSchevy]

Ok yes it is a flex joint, confirmed. Are you sure the o2s behind the secondaries with the cat deletes will not require a tune and throw no codes? I'm going to give it a shot if so. If not then I'll just do a secondary delete and weld in some exhaust diverters. Call it Done

[STEVE41]

the 2nd sets of cats are definitely not monitor

[Ian SS]

Originally Posted by oldman

The dyno shows about 10 HP, 10 ft /lbs across the board. It is posted on other page. I'm only doing things that will increase the midrange as you know 1st gear and really 2nd are very long pulls. I hate the gear ratio on the m6 trans, great for autoX, needs to be 20% steeper for a true street fighter gear.

Those gains are with a full dyno tune...if someone simply bolts this kit on it looks like they will LOSE power until 6k rpm and LOSE torque all across the powerband.

CMS said they only picked up about 10whp/10wtq with just a pump gas tune, otherwise completely stock. So really, this is just a mod for sound unless you have other exhaust work being done.

And to confirm, you can delete the secondary cats and not throw codes. I spent $150 to have the 2nd cats cut out and a straight pipe welded on, and it sounds GREAT and I don't have to have a tune.

[oldman]

Originally Posted by RuthleSSchevy

Ok yes it is a flex joint, confirmed. Are you sure the o2s behind the secondaries with the cat deletes will not require a tune and throw no codes? I'm going to give it a shot if so. If not then I'll just do a secondary delete and weld in some exhaust diverters. Call it Done

can't be sure till its done, I can't see any reason why. Well I can in the sense with new cars the cat is expected to light-off fast any change in distance from exhaust port, increase in pipe size or large reduction in backpressure can cause a low performance of cat light to come on intermittently, usually when it is freezing out and you are at low speed dropping the kids off at school. Other than that I could not think of anything. That low performing cat / cat inefficient was a common light on the oldlady's type R Volvo with 3" downpipe and high flow cat.

[oldman]

Originally Posted by slo_1ss

Those gains are with a full dyno tune...if someone simply bolts this kit on it looks like they will LOSE power until 6k rpm and LOSE torque all across the powerband.

CMS said they only picked up about 10whp/10wtq with just a pump gas tune, otherwise completely stock. So really, this is just a mod for sound unless you have other exhaust work being done.

And to confirm, you can delete the secondary cats and not throw codes. I spent $150 to have the 2nd cats cut out and a straight pipe welded on, and it sounds GREAT and I don't have to have a tune.

I would think it would sound great, So far I wanted a true bolt-on set the car is only 6 weeks old.

Adding a high flow cat and removing all four factory cats does need some cutting. Not that I'm shy.

[jessehell]

Has anyone else gotten these? I paid a week ago with no ship confirmation and they won't return my emails

[RaptorGXP]

Originally Posted by jessehell

Has anyone else gotten these? I paid a week ago with no ship confirmation and they won't return my emails

Sent you a pm

[oldman]

they say on their site, that these are custom made in small batches...

[RaptorGXP]

Originally Posted by oldman

they say on their site, that these are custom made in small batches...

Thx oldman
I sent him jesse a pm with more info

[oldman]

The more I drive it, the better the sound... I'm tuning now a little change each day. Then "test driving it".

[Ls6larry]

So what are people doing about the rear o2 sensors, with the catless pipe you need sims or end up with check engine , guys just running around with engine lights on ? Or someone figure out o2 sims, what's the story ? Also I also see a loss in power without a tune, who in there right mind would want to lose power then have to void there warranty with a tune to get a few up?

[Tuned Camaro]

Some of you are taking the dyno curves to be the complete story of what is going on when they rarely are. You will not lose power by putting the cat delete pipes on. That makes zero logical sense. The slight hit between the two runs above is most definitely timing and nothing more. A half of degree of timing variation would easily have that much variance in torque output.

The Dynojet attempts to apply a correction factor based on air conditions. The ECM does not operate this way. There is no normalization to a set of standard conditions when it is commanding AFR or timing.

Without O2 simulators there is no option but to tune out the O2s if you delete the primary cats.

[Ian SS]

Originally Posted by Tuned Camaro

Some of you are taking the dyno curves to be the complete story of what is going on when they rarely are. You will not lose power by putting the cat delete pipes on. That makes zero logical sense. The slight hit between the two runs above is most definitely timing and nothing more. A half of degree of timing variation would easily have that much variance in torque output.

The Dynojet attempts to apply a correction factor based on air conditions. The ECM does not operate this way. There is no normalization to a set of standard conditions when it is commanding AFR or timing.

Without O2 simulators there is no option but to tune out the O2s if you delete the primary cats.

Soooooooooo.....best case scenario there are no gains? What are you suggesting? Still seems there are better ways to spend $300.