anyone dyno before true duals and after?
Re: anyone dyno before true duals and after? Before true duals - 318 rwhp, 326 rwtq
After true duals w/ x-pipe - 308 rwhp, 303 rwtq
However, I picked up 1.5 mph in the 1/4...?
In any case, I went beck to the y-pipe setup becuase the duals were WAY too loud and I do a lot of highway driving.
After true duals w/ x-pipe - 308 rwhp, 303 rwtq
However, I picked up 1.5 mph in the 1/4...?
In any case, I went beck to the y-pipe setup becuase the duals were WAY too loud and I do a lot of highway driving.
Re: anyone dyno before true duals and after? I've seen a H/C car loose HP with true duals with no type of H or X pipe.
Also going from MAC's to LT's wasnt' much of a difference on his either.
Also going from MAC's to LT's wasnt' much of a difference on his either.
Re: anyone dyno before true duals and after? LTs are mainly for sound. yes they gain midrange TQ, but hardly enough to justify the money. face it, the MAC sound terrible, but flow great!
also you will need an H or preferrably X pipe or you will lose power on the dyno. i dont know about the track. i have stuck with my ole 2.5" y-pipe - seems to make good power to me! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
also you will need an H or preferrably X pipe or you will lose power on the dyno. i dont know about the track. i have stuck with my ole 2.5" y-pipe - seems to make good power to me! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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From: Friendswood TX
Re: anyone dyno before true duals and after? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by gator's 99TA:
<strong>face it, the MAC sound terrible, but flow great!
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Care do explain? so the LTs are deeper and sound better?
Drew
<strong>face it, the MAC sound terrible, but flow great!
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Care do explain? so the LTs are deeper and sound better?
Drew
Re: anyone dyno before true duals and after? Best I can tell you is from a stock A4/1998 car with a small cam and stock heads:
Before - Mac Headers (with CATs) and B&B Triflow
After - Dynatech headers (no CATs) with 2.5 true duals through Flowmasters
About a 14rwhp across the entire range. I do know the car responded much better at the track on the bottle though. I'd say 8-10 rwhp was through the removal of the CATs. So I'd say about a 5rwhp gain without considering CATs.
Before - Mac Headers (with CATs) and B&B Triflow
After - Dynatech headers (no CATs) with 2.5 true duals through Flowmasters
About a 14rwhp across the entire range. I do know the car responded much better at the track on the bottle though. I'd say 8-10 rwhp was through the removal of the CATs. So I'd say about a 5rwhp gain without considering CATs.
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On The Tree
Joined: Apr 2002
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From: Somewhere in Dallas, TX USA
Re: anyone dyno before true duals and after? Why have so few people gone from a y to duals and dyno before and after.
Usually the ones I hear about are the ones losing power.
Surely, someone has had good results. I'd like to know too.
Usually the ones I hear about are the ones losing power.
Surely, someone has had good results. I'd like to know too.
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Verdad Gallardo Re: anyone dyno before true duals and after? there are some good results but they are people that were stock to duals. people that went from a good 2.5/3" y-pipe with a good collector are not going to gain much if any at all.
now most that LOSE power are the ones that did not put a good x-pipe in the middle to create exhaust velocity and good pulse. otherwise it is not as good. still, not a great mod if you have a good flowing y-pipe!
now most that LOSE power are the ones that did not put a good x-pipe in the middle to create exhaust velocity and good pulse. otherwise it is not as good. still, not a great mod if you have a good flowing y-pipe!
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From: Objects in mirror no longer matter.
Re: anyone dyno before true duals and after? I think verbs has a before and after dyno gaining 8 rwhp or so at the bolton level, also flattened out his powerband big time.
