downpipe
#1
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downpipe
I have read that "adding a downpipe gives better turbo response and HP gains" and that "a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components" and that "a downpipe alone does not require any fuel enrichment." Are these statements true?
Also, will adding a downpipe
1) increase emissions?
2) increase noise?
Also, will adding a downpipe
1) increase emissions?
2) increase noise?
#2
Mr. Links
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Re: downpipe
Originally posted by drm_mchn
I have read that "adding a downpipe gives better turbo response and HP gains" and that "a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components" and that "a downpipe alone does not require any fuel enrichment." Are these statements true?
Also, will adding a downpipe
1) increase emissions?
2) increase noise?
I have read that "adding a downpipe gives better turbo response and HP gains" and that "a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components" and that "a downpipe alone does not require any fuel enrichment." Are these statements true?
Also, will adding a downpipe
1) increase emissions?
2) increase noise?
1) Yes
2) Yes
#3
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Will adding a downpipe make it difficult to pass emissions inspections?
What kind of and how much extra noise will result from adding a downpipe?
Are there any other reasons not to add a downpipe (e.g. decreased turbo life)?
What kind of and how much extra noise will result from adding a downpipe?
Are there any other reasons not to add a downpipe (e.g. decreased turbo life)?
#4
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If the emissions person really LOOKS then it may not pass. It will make your aftermarket exhaust sound a little louder not much. Not sure about the stock exhaust. Adding a DP is one of the best mod you can do fro reliablity. It should've came with a DP straight from Mazda but it was an emissions issue.
#5
As long as everything else is in working order, and the car is mostly stock, you can pass emmisions once you have the main cat on. I've seen it done in both VA and MD. A DP should be no problem.
They look for your main cat during inspections.
A DP will add noise, but not as much as a striaght exhaust system, or large cat-back would. Honestly, just go with the mod, there are far more pros, than cons.
They look for your main cat during inspections.
A DP will add noise, but not as much as a striaght exhaust system, or large cat-back would. Honestly, just go with the mod, there are far more pros, than cons.
#6
Mr. Links
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Originally posted by drm_mchn
Will adding a downpipe make it difficult to pass emissions inspections?
Will adding a downpipe make it difficult to pass emissions inspections?
Originally posted by drm_mchn
What kind of and how much extra noise will result from adding a downpipe?
What kind of and how much extra noise will result from adding a downpipe?
Originally posted by drm_mchn
Are there any other reasons not to add a downpipe (e.g. decreased turbo life)?
Are there any other reasons not to add a downpipe (e.g. decreased turbo life)?
#7
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Re: downpipe
Originally posted by drm_mchn
I have read that "adding a downpipe gives better turbo response and HP gains" and that "a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components" and that "a downpipe alone does not require any fuel enrichment." Are these statements true?
Also, will adding a downpipe
1) increase emissions?
2) increase noise?
I have read that "adding a downpipe gives better turbo response and HP gains" and that "a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components" and that "a downpipe alone does not require any fuel enrichment." Are these statements true?
Also, will adding a downpipe
1) increase emissions?
2) increase noise?
yes to lowering temps
no not really with other mods of course but alone probably not
yes and yes to the last two
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#8
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Thanks for the help so far. I'll follow your advice and go with the mod.
Now, could someone explain how "adding a downpipe gives better turbo response and HP gains," in layman's terms?
Now, could someone explain how "adding a downpipe gives better turbo response and HP gains," in layman's terms?
#9
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You are replacing a restrictive 2-1/4" catalytic converter with a wide open 3" pipe. This allows exhaust gases to exit the engine more quickly, which increases turbo response (higher velocity=faster spool-up) and horsepower (more air in and out of engine--more power).
If you are otherwise stock, you will notice a slight noise increase and you'll be able to hear your turbos spool easier. There are no real negatives. Get one today!
If you are otherwise stock, you will notice a slight noise increase and you'll be able to hear your turbos spool easier. There are no real negatives. Get one today!
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Originally posted by drm_mchn
Last question:
Are you certain that faster spool-up does not decrease turbo life?
Last question:
Are you certain that faster spool-up does not decrease turbo life?
I think you need to relax. If you are keeping the car mostly stock and only boosting stock boost levels (10 psi), your turbos should last over 100k. Nothing is guaranteed of course. If you are truly concerned, use synthetic motor oil as it will help your turbos last longer (this is NOT an opportunity to start the dyno juice vs. synthetic debate again....).
#14
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Re: downpipe
Originally posted by drm_mchn
I have read that "adding a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components"
I have read that "adding a downpipe will also significantly lower underhood temperatures, extending the life of all underhood components"