Exhaust systems
12-30-2015 | 09:51 PM
#61
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Joined: Jun 2009
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From: Chicago
It`s a gas orifice from a furnace.. brass, so easy to customize
and i happen to have an unlimited supply
I like the GEN IIIs because no more leaks but I don`t think they are as good as a tuned header .. it`s basically a big fire hose, they claim no power loss .. I`m not so sure.
and i happen to have an unlimited supply
I like the GEN IIIs because no more leaks but I don`t think they are as good as a tuned header .. it`s basically a big fire hose, they claim no power loss .. I`m not so sure.
Last edited by ICDEDPPL; 12-30-2015 at 09:56 PM.
12-31-2015 | 01:51 PM
#62
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From: Northport N.Y.
I`ve found it depends on how long the tail is .. My STEROID headers the collector was so far back there was a short tail and it reverted. The collector would be soaking wet... worse with mufflers closed. Had to buy a bunch new valves this year due to pitting from reversion. The current SM Gen 3 have a long tail and no issues whatsoever.
I do dump overboard from inside the boat but have a hole inside the tail at the end to keep the mufflers from burning up.
I do dump overboard from inside the boat but have a hole inside the tail at the end to keep the mufflers from burning up.
Looks good did the tail pipes come welded at the end?
12-31-2015 | 04:01 PM
#63
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From: Olmsted Falls,Ohio Marblehead,Oh
01-01-2016 | 06:47 AM
#66
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From: Tygart Lake, WV
Just wanted to add some info on the wet vs dry tails. Bobl and Raylar found 20-25 hp gains on a set of CMI's adding the dry tails on 500-600 hp engines. Bobl stated in a later post that low end torque did not suffer as much loss with the wet tails.
05-27-2018 | 09:49 AM
#68
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From: Merritt Is. Fl. USA
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08-20-2018 | 06:22 AM
#69
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Just reading through this thread, I understand with a big cam NA engine good exhaust is going to be more important than a (mild) blower set up, but what about 502 mag with the not great for anything wet joint style manifolds they come with... thinking of doing side mount whipples this winter, mild set up, probably only 4 to 6 lbs boost... what I’ve heard is they “might” build some heat under long pulls, but “probably” be ok... want to do this right so really should I be upgrading the exhaust or am I not going to see any difference? Any suggestions on a (relatively) economical upgrade that still flow well on this mild of a set up? I feel as though when I was considering this last year that the Gils might have fitment issues with the sidemounts. Was considering Lightning’s but what mild thunder posted above although that was a while ago, at that rate might as well go with cmi cost wise?
Thanks!
Joe
Thanks!
Joe
08-20-2018 | 10:27 AM
#70
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From: St. Pete Beach, FL
Just reading through this thread, I understand with a big cam NA engine good exhaust is going to be more important than a (mild) blower set up, but what about 502 mag with the not great for anything wet joint style manifolds they come with... thinking of doing side mount whipples this winter, mild set up, probably only 4 to 6 lbs boost... what I’ve heard is they “might” build some heat under long pulls, but “probably” be ok... want to do this right so really should I be upgrading the exhaust or am I not going to see any difference? Any suggestions on a (relatively) economical upgrade that still flow well on this mild of a set up? I feel as though when I was considering this last year that the Gils might have fitment issues with the sidemounts. Was considering Lightning’s but what mild thunder posted above although that was a while ago, at that rate might as well go with cmi cost wise?
Thanks!
Joe
Thanks!
Joe
we would assume merc has some data showing you’ll want big tube headers in the 850+hp range. But no one has confirmed this with a header shootout on a big blower motor and shared the data.
