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Discussion Starter · #1 ·
Hi guys,
I have posted this before but because nobody at that time answered my question; ill ask again :silly:
AM I THE ONLY ONE WAITING ON AFTERMARKET TO BRING ME TEST PIPES FOR MY 8?

Ok now i calm down and go take some prozac :nutkick:
 

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Ripley's believe it or not

Desmo said:
Hi guys,
I have posted this before but because nobody at that time answered my question; ill ask again :silly:
AM I THE ONLY ONE WAITING ON AFTERMARKET TO BRING ME TEST PIPES FOR MY 8?

Ok now i calm down and go take some prozac :nutkick:
For those few who may be scratching their heads-

Definition: A short piece of exhaust pipe that's designed to replace a catalytic converter in an exhaust system-supposedly while you test the results of the switch (See Catalytic Converter). Test pipes are illegal and you can be fined if you're caught with one on your vehicle.

Answer: It's because people currentlt in the tuning business have found that eliminating the cats on the SRT8 does not make any more power.

Zilla
 

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goddardzilla said:
Answer: It's because people currentlt in the tuning business have found that eliminating the cats on the SRT8 does not make any more power.

Zilla
Please post the source of this info, as the only info we have is the the metallic core cats Magnaflow is about to offer gained power. The also gained power across the entire RPM range, not a lot, but it was a gain. It is doubtful that test pipes will gain much over the high flow cats Magnaflow is offering(metallic core substrate, very high flowing), but there is power to be gained.

Going to a test pipe is going to give you a problem with CELs. You will set PO420 and PO430 for cat inefficiency and depending on how you place the O2s behind the cats, you could set a couple other codes for the secondaries. Having the CEL on is a automatic emissions failure, so you would have to make sure your 'test' pipe is an easy swap.

Todd
 

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Discussion Starter · #4 ·
It will not bring a cell if you use spark plug spacers (cat foolers) on the bung, like sti guys do, s2000 guys do, blah blah blah.
I can accept that magnaflow have good flow, but please, more flow is alays a plus on the power side...
Thanks for the answer ill consider magnaflow hi flow answer to the problem...
By the way anybody have the link of the gain with magnaflow hi flow cats?
Thanks buds :0)
 

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Desmo said:
It will not bring a cell if you use spark plug spacers (cat foolers) on the bung, like sti guys do, s2000 guys do, blah blah blah.
I can accept that magnaflow have good flow, but please, more flow is alays a plus on the power side...
Thanks for the answer ill consider magnaflow hi flow answer to the problem...
By the way anybody have the link of the gain with magnaflow hi flow cats?
Thanks buds :0)
Do you have a link for those spacers you mention? I am getting a PO430 on my turck with high flow cats and somebody mentioned spacing the secondary O2 out a little to cure it. I guess you put this spacer on there and it pulls the O2 out a little closer to the inner pipe wall(boundry layer is slower moving, which is apparently good in the case of high flow cats).

Todd
 

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Re test pipes produce no more powerer than factory cats

WhiteDiamond said:
Please post the source of this info, as the only info we have is the the metallic core cats Magnaflow is about to offer gained power. The also gained power across the entire RPM range, not a lot, but it was a gain. It is doubtful that test pipes will gain much over the high flow cats Magnaflow is offering(metallic core substrate, very high flowing), but there is power to be gained.

Todd
My pleasure Todd: source was a John Hennessy post. He tried test pipes and found no increase in power over std cats.

I don't doubt that non-logical outcomes are often forthcoming. It seems to again highlight the limitations imposed by the DCX computer map particularly the limitations of Speed/Density fuel injection.

Zilla
 

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goddardzilla said:
My pleasure Todd: source was a John Hennessy post. He tried test pipes and found no increase in power over std cats.
Zilla
Yeah, I saw that, but it was just a John Hennessey statement with no data(dyno sheets or numbers) to back it up. I know I ride John hard, but after the header BS, I think he needs to be a lot more factual and a lot less hype.

Todd
 

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IGOTTASRT8 said:
Or...we could leave the cats on and have clean air. :wall:
I had the 'old school' ceramic(or whatever they make the brick out of) style high flow cats on my last really serious project and it lost 3rwhp and 5rwtq on the dyno in direct back to back testing. 3rwhp is easily seen in back to back dyno tests with no change, so I'm not sure there was any loss. The torque was a bit more noticable, as it was lower across the band, but not a huge loss.

Todd
 

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Desmo...

do a search on the performence section and look for a thread probably under me as the author or btlfed1500 for high flow cats from magnaflow and see the attached dyno sheet - it is a 9.6hp gain.
And will be going on my car in a couple of weeks.
It is still not fully 50 state legal and it has not had its price set either.
So expect something public by the end of November.
Hope that helps.
Sincerely,
 

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cbutler32 said:
do a search on the performence section and look for a thread probably under me as the author or btlfed1500 for high flow cats from magnaflow and see the attached dyno sheet - it is a 9.6hp gain.
And will be going on my car in a couple of weeks.
It is still not fully 50 state legal and it has not had its price set either.
So expect something public by the end of November.
Hope that helps.
Sincerely,
Or, just go back to reply number 7 in this thread where I posted the link.....

Todd
 
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