Dual Exhaust/Test Pipe RASP proven fix
#47
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Anyone done with this fix with stock header and CAT? Some says drone gone completely but I saw others saying drone range went lower to 1k-1.5k. I like my Injen SES but really annoied with drone at 2k. Thanks for the help!
#49
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Originally Posted by gothchick
We fabricated this mod for my HKS hi Power with stock headers and HFC's. It did a pretty good job of eliminating the h-pipe rasp - and helped to net a few more ponies up on the dyno.
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Originally Posted by ISMSOLUTIONS
For the most part, what you created was an X pipe...
I've been extremely happy with it. Great mod.
Last edited by gothchick; 08-17-2007 at 09:11 AM.
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Originally Posted by Alberto
Post a before and after dyno of this mod/claim.
People seem to use a range of DJ to DD conversion factors. But most use between 11% to 13%. Pick which ever you feel is relavent.
before & afters:
my DJ to DD correction factor of 11% = +16 whp
my DJ to DD correction factor of 13% = +10 whp
my DJ to DD correction factor of 15% = +05 whp
I actually put it up on the dynojet to confirm additional road tuning tweaks. Just tweaking it for max whp within my target afr & knock thresholds. So the new dyno numbers were also the result of addtional utec tuning... How much of the additional whp was tuning vs. x-pipe mod?
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Last edited by gothchick; 09-17-2007 at 12:31 PM.
#54
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Hi, I am using a Invidia G200 here in Germany and have a loud rasp from 3.500 rpm on in every gear when I accelerate quickly. I think I have no mufflers like u would call it in English. How can I fix the rasping a bit? The problem is that our regulation department for vehicles here says that if I insert something to slow down the airflow it would result in some kind of too high backpressure which could destroy the engine and is in addition not allowed in Germany. I would be glad for some help. Sorry if I don't use the correct terms maybe. I hope someone can help me. Thanks in advance.
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Has anyone try this fix on the New Injen Track Edition exhaust with Test Pipes on there cars? I like my exhaust but I can stand the droning it produces.
Thanks
Thanks
#56
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Anyone w/ a borla try this yet? I know its not a "true dual" like the injen, but I would like to get rid of the h-pipe. Any one have any info? Apprecieate anything. Thanks in advance!!
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