Which supercharger kit Should I GET!!

[CSG Mike]

Originally Posted by glamcem

Mike, I had a good tune and I bet you did too but you guys still managed to destroy the OEM cats right?

Both of the tuners I spoke with recommended a freer flowing exhaust to eliminate back pressure and added heat.. Freeman was using another tune and his cats were also destroyed..

I'm pretty sure majority of the JR kits also don't see as many track days, I think the question is : " Is it worth to take risks associated with running OEM cats and say buh bye to your motor ?" When things go bad,

We destroyed the OEM cats on an OEM engine with an OEM tune.

We have more track time on our JRSC with CARB tune engine than we did on our first three NA engines combined, and have zero cat problems.

It's all in the tune.

[CSG Mike]

Originally Posted by glamcem

Lack of 5-6 hp is not the problem with the OEM header (cats specifically) and the front pipe, the problem is the restrictive cats that may cause safety issues such as backfire or melted cats that might sucked in to the engine, I think you should be fine with the OEM catback but I wouldn't use the OEM header and front pipe for sure..

Check my build thread and FI section

If you're got backfires in the cat, or cat pieces being sucked into the engine, you have much, much bigger problems to worry about.

[glamcem]

Originally Posted by CSG Mike

If you're got backfires in the cat, or cat pieces being sucked into the engine, you have much, much bigger problems to worry about.

I meant to say back pressure, and there is a good chance your cat piece may be sucked in to the engine at cold start and yes you may have a bigger problems at that point

[glamcem]

Originally Posted by CSG Mike

We destroyed the OEM cats on an OEM engine with an OEM tune.

We have more track time on our JRSC with CARB tune engine than we did on our first three NA engines combined, and have zero cat problems.

It's all in the tune.

If you were able to destroy the OEM cats with stock power levels, it shouldn't be hard to destroy them with 50%-60% more power.. I don't think it's just tune because you make more power and ultimately generate more heat, EGT s ..

[Freeman]

Originally Posted by glamcem

Freeman was using another tune and his cats were also destroyed..

Not me. I'm on the canned kraftwerks tune with a castless header and catted front pipe.

Sent from my SAMSUNG-SGH-I317 using Tapatalk

[glamcem]

Originally Posted by Freeman

Not me. I'm on the canned kraftwerks tune with a castless header and catted front pipe.

Sent from my SAMSUNG-SGH-I317 using Tapatalk

Ugh, of course not I was thinking @Model Citizen and his recent experience with the OEM header, my bad :/

[CSG Mike]

Originally Posted by glamcem

I meant to say back pressure, and there is a good chance your cat piece may be sucked in to the engine at cold start and yes you may have a bigger problems at that point

That's not possible unless you or your tuner REALLY tweaked the startup cam timing and are sucking in exhaust during the intake stroke.

[CSG Mike]

Originally Posted by glamcem

If you were able to destroy the OEM cats with stock power levels, it shouldn't be hard to destroy them with 50%-60% more power.. I don't think it's just tune because you make more power and ultimately generate more heat, EGT s ..

Exhaust temp has little correlation with EGTs. It's in the tune, and partly injectors. Spray pattern, stratification, and flame front temperature and speed are going to be the determining factors in EGTs.

Pulling timing or running abnormally rich will also raise EGTs, but again, tuning issues.

The reason the OEM cats were destroyed was the OEM tune was pulling timing like crazy for whatever reason, resulting in an ultra high EGT. Again, tune. No variables in a stock engine.

[jdmblood]

is op trolling? he hasn't even replied to peoples responses

[Model Citizen]

Originally Posted by glamcem

Ugh, of course not I was thinking @Model Citizen and his recent experience with the OEM header, my bad :/

On my end i consider only having killed a header cat this season being boosted and the abuse the car has seen as a win.

Hell even the clutch survived.

Next year i'm sure i won't be so lucky, but whatever, pay to play.

[glamcem]

Originally Posted by CSG Mike

That's not possible unless you or your tuner REALLY tweaked the startup cam timing and are sucking in exhaust during the intake stroke.

Mike I am surprised you never heard that before because at least 3 other people (not tuners, mechanics ) mentioned this to me and one of the guy's friend lost his engine because of that ..and that's the same reason why many people wash and/or vacuum their manifolds or other exhaust pieces after they get rid of the cats

here's what a quick google search found me

[ame="http://youtu.be/TVpS_ENBraQ"]http://youtu.be/TVpS_ENBraQ[/ame]

[glamcem]

Originally Posted by CSG Mike

Exhaust temp has little correlation with EGTs. It's in the tune, and partly injectors. Spray pattern, stratification, and flame front temperature and speed are going to be the determining factors in EGTs.

Pulling timing or running abnormally rich will also raise EGTs, but again, tuning issues.

The reason the OEM cats were destroyed was the OEM tune was pulling timing like crazy for whatever reason, resulting in an ultra high EGT. Again, tune. No variables in a stock engine.

how is that so? EGT stands for "Exhaust gas temperature"

at the end of the day, more power, in our case substantially more power (about 50-65% more power than stock) means more heat generated in the engine and the rest of the system (exhaust manifold), no matter what ..

[CSG Mike]

Originally Posted by glamcem

how is that so? EGT stands for "Exhaust gas temperature"

at the end of the day, more power, in our case substantially more power (about 50-65% more power than stock) means more heat generated in the engine and the rest of the system (exhaust manifold), no matter what ..

Brain fart.

It should read power output has little correlation with EGTs.

[CSG Mike]

Originally Posted by glamcem

Mike I am surprised you never heard that before because at least 3 other people (not tuners, mechanics ) mentioned this to me and one of the guy's friend lost his engine because of that ..and that's the same reason why many people wash and/or vacuum their manifolds or other exhaust pieces after they get rid of the cats

here's what a quick google search found me

I find it highly unlikely that a cat piece can be sucked in, through multiple bends including a 90 degree bend, upward, through the exhaust valve.

I'm gonna say slim to none, until someone actually has a FA20 fail in that manner.