Modifying for " Dummies"

[DSteck]

Originally Posted by Dr Jekel

so if you add headers it's a good idea to add high flow cats?

I usually throw cats in the garbage.

[Darth_Emma]

I am having Kooks LT headers with high-flow cats installed with a Borla Touring exhaust on Tuesday. The guys at the performance shop said I should use the cats. Why do you say they are not a good idea?

[DSteck]

I'm not saying they are a bad idea unless you plan to run leaded gas or nitrous. I just don't use them because I don't care about the extra noise and smell.

[camarohead]

Ok. For the most horsepower and torque. High flow cats or no cats.

[JR-Vette]

CAT designs of today cost very little to performance over the old brick types of years ago.
EPA being they make the nameplates warranty CATs for 8 years state being they are replaced for free to the car owner that only OEM CAT be used.

Most so called high flow CATs do nothing for performance and in many cases go bad in much shorter timeframe then the stock OEMs.
I see them all the time that get plugged up and effect AFR left/right banks.
Vendors like to sell them for the profit but if maintaining CATs for legal purposes then stick with the stock ones.
Some are ill designed and cause O2 Sensor tests to fail causing DTC error codes.
Being the PCM monitors the CAT temps it is better to use stock ones that maintain the proper heat range the PCM monitors for. Incorrect CAT temp can cause PCM to switch into Cat Over Temp (COT) and dump excess fuel in to cool the CATs to prevent CAT failures and ruin proper AFR for power enrichment or WOT.

Consider Corvette C6 Z06 or even ZR1 with 640 HP uses stock CATs so they are not delimiting the performance.

[Dr Jkel]

So are you saying that if you add headers to your car that you need no cats or just use the stock ones. I am a little confused on this, Thanks

[DSteck]

If you put headers on your car, then the cats that are designed to be used with the headers will barely function. Looking at stock exhaust, I don't think you'd be able to retrofit the stock cats to work with headers... headers will position them too far back to be in an effective operating temperature range.

[JANNETTYRACING]

Originally Posted by Dr Jekel

So are you saying that if you add headers to your car that you need no cats or just use the stock ones. I am a little confused on this, Thanks

Manifolds and Stock Cats get replaced as an assembly by Long Tube Headers and High Flow Cats.

The connection points are your cylinder heads and the Clamps right under the Transmission crossmember.

Ted.

[Dr Jkel]

Originally Posted by DSteck

If you put headers on your car, then the cats that are designed to be used with the headers will barely function. Looking at stock exhaust, I don't think you'd be able to retrofit the stock cats to work with headers... headers will position them too far back to be in an effective operating temperature range.

What do you mean by barely function?

[DSteck]

Originally Posted by Dr Jekel

What do you mean by barely function?

They will not effectively break down NOx.

[Dr Jkel]

So basically people only use high flow cats if they are in a state that their vehicles are tested?

[camarohead]

Originally Posted by JANNETTYRACING

Manifolds and Stock Cats get replaced as an assembly by Long Tube Headers and High Flow Cats.

The connection points are your cylinder heads and the Clamps right under the Transmission crossmember.

Ted.

Ok. Got it now. Thx

[Dr Jkel]

Mine should arrive this week and be ready installed by next Tuesday, I'll let you know how it goes, should be awesome.

If you have any questions just ask and they will get answered. Ted gave me alot of info even before I purchased one thing, it did make it easier after meeting him at C5F. Seemed like a real stand up guy.

[Dr Jkel]

OK another question for the pro's. What is forced induction? What are the benefits?

At C5F a 67 naturally aspirated was cleaning peoples clocks, she didn't win it but consistently ran in the low 11's. All she had was headers and motor.

[camarohead]

Originally Posted by Dr Jekel

Mine should arrive this week and be ready installed by next Tuesday, I'll let you know how it goes, should be awesome.

If you have any questions just ask and they will get answered. Ted gave me alot of info even before I purchased one thing, it did make it easier after meeting him at C5F. Seemed like a real stand up guy.

Thx doc

[JANNETTYRACING]

Originally Posted by Dr Jekel

OK another question for the pro's. What is forced induction? What are the benefits?

At C5F a 67 naturally aspirated was cleaning peoples clocks, she didn't win it but consistently ran in the low 11's. All she had was headers and motor.

Forced induction is anything that creates manifold Pressure above atmospheric pressure, weather a centrifugal or positive displacement supercharger, turbocharger.

Ted.

[Darth_Emma]

Originally Posted by Dr Jekel

Mine should arrive this week and be ready installed by next Tuesday, I'll let you know how it goes, should be awesome.

If you have any questions just ask and they will get answered. Ted gave me alot of info even before I purchased one thing, it did make it easier after meeting him at C5F. Seemed like a real stand up guy.

What are you having installed? Headers or a cam? I've lost track.

My Kooks LT 1 7/8" catted headers and Borla Touring exhaust go on tomorrow along with a dynotune. I have the battery in the video camera all charged up. IPS Motorsports will be doing the work.

[camarohead]

Originally Posted by Darth_Emma

What are you having installed? Headers or a cam? I've lost track.

My Kooks LT 1 7/8" catted headers and Borla Touring exhaust go on tomorrow along with a dynotune. I have the battery in the video camera all charged up. IPS Motorsports will be doing the work.

Cool. Yea keep us informed.

[DSteck]

Originally Posted by Darth_Emma

IPS Motorsports will be doing the work.

Good choice.

[Dr Jkel]

Originally Posted by Darth_Emma

What are you having installed? Headers or a cam? I've lost track.

My Kooks LT 1 7/8" catted headers and Borla Touring exhaust go on tomorrow along with a dynotune. I have the battery in the video camera all charged up. IPS Motorsports will be doing the work.

Terri,

I am having Headers, High-flow cats, Cold Air Induction CAI and cam installed, basically JRE 415 Street Brawler Package with a cam package. I am a little unsure of the exact specs of the cam, but spent alot of time on the phone and e-mail with Ted Jannetty and we kinda figured out what I wanted. He is the going to write a tune for my car once everything is installed.

For me it wasn't so much about the performance aspect of it, but the sound of it. People say I am crazy for spending that amount of money on a sound, but that is what I want, the old muscle car lope, not so much lope that it sounds like it is going to stall but a nice little lick.

Reliablility and dependability were other factors that I had. My car will not be raced on the strip or street or on any track so that wasn't a concern. I guess you could say that mine is a garage queen in a way. It has seen triple digits once and that was at C5F on the cruise.

I can say this about Jannetty Racing, I met Ted at C5F and he was super nice and has had the patience of Job answering every question I had, even when I was totally confused. Adding to the stress of this is that I live in Alabama and Ted is in Connecticut and I will have to have another person install his stuff so to speak.

It didn't hurt that I saved about 3000.00 with Jannetty either.

FT Performance in Alabama will be doing the install. He is a racer and has a performance shop. He just won street wars, ran a 6.3 in the 1/8th. Don't rally know if that is good but that is what he won with.

[Dr Jkel]

Originally Posted by JANNETTYRACING

Forced induction is anything that creates manifold Pressure above atmospheric pressure, weather a centrifugal or positive displacement supercharger, turbocharger.

Ted.

Mr Ted,
I can grasp what forced induction is, I guess what I am asking is what is the difference in a Procharger, Supercharger, TurboCharger, one screw, twin screw etc....and what does methanol injection have to do with this.


At C5F there was a 67 Camaro that had motor and headers and she was stout running consistent low 11's, so what would be the benefits of forced induction because she had none of that and was fast.

[06MonteSS]

Originally Posted by Dr Jekel

Mr Ted,
I can grasp what forced induction is, I guess what I am asking is what is the difference in a Procharger, Supercharger, TurboCharger, one screw, twin screw etc....and what does methanol injection have to do with this.


At C5F there was a 67 Camaro that had motor and headers and she was stout running consistent low 11's, so what would be the benefits of forced induction because she had none of that and was fast.

The key difference between a turbocharger and a supercharger is its power supply. Something has to supply the power to run the air compressor. In a supercharger, there is a belt that connects directly to the engine. It gets its power the same way that the water pump or alternator does. A turbocharger, on the other hand, gets its power from the exhaust stream. The exhaust runs additional piping you have to install, and it goes through a turbine, which in turn spins the compressor.

A turbocharger causes some amount of back pressure in the exhaust system and tends to provide less boost (compared to a supercharger) until the engine is running at higher RPMs and the turbo "spins/winds up". Superchargers are easier to install but tend to be more expensive.

"Procharger" is just a brand of supercharger... just like Magnuson is another brand of superchargers...

the types of superchargers there are, are a Roots type, centrifugal, and twin screw....

here's info on the differences:

http://superchevy.automotive.com/522...ory/index.html

[Dr Jkel]

Originally Posted by 06MonteSS;1836456
[url

http://superchevy.automotive.com/52287/0510sc-theory/index.html[/url]

Monte

This is an awesome article. A lot of good information, Thanks for posting the link.

[American Muscle]

great thread and thanks to those posting answers for us who are still learning, my questions is what is the difference in exhaust types. For example what is a difference between an axle back or a cat back. I hear these names being associated with exhaust systems but sadly have no idea what they mean. Thanks.

[Darth_Emma]

Oh I know this one! I am having headers and a cat back exhaust installed today, so I recently did some homework on this. I do NOT claim to be an expert.

A cat back runs from the catalytic converters back to the tips. It's a full exhuast system. It replaces the whole exhaust from the manifold back to the tips (or from the headers back to the tips). It replaces the resonators, mufflers, the whole exhaust.

An axle back is from the rear axle back to the tips. It is only a partial replacement of the exhaust. An axle back replaces basically the back section with the mufflers. You keep your stock cats and resonators in this case.

How'd I do?