EMI Exhaust Performance Gains?
#1
Gold Member
Gold Member
Thread Starter
EMI Exhaust Performance Gains?
I have a 1999 28' Checkmate Convincor with twin 454 EFI Mags. Engines are currently getting checked out and dyno-tuned and I'm considering bolting on some black EMI Thunder exhaust manifolds and risers (I have Corsa Quick-n-Quiet switchable exhaust and it has to be compatible). I don't want to mod the engines much if at all, but a little more bolt-on power and less weight would be nice as the boat is obviously a little stern-heavy with this set-up.
Just wondering what gains I can expect in power and speed with this set-up. If anyone has any experience or knowledge, I'd appreciate it.
Thanks!
Just wondering what gains I can expect in power and speed with this set-up. If anyone has any experience or knowledge, I'd appreciate it.
Thanks!
#3
Registered
iTrader: (4)
However, the dry joint is piece of mind over the stock wet joint you have now, plus the water dump will occur futher away from your engine which is also a plus.
Future mods with any kind of performance cam will not be possible with your stock exhaust.
The after market exhaust also has a decent resale value, you can pull it off before you sell your boat, re-sell or use on your next ride
#4
Registered
I installed a set of EMI Thunder exhaust on a Nordic Viking with a 330HP 454. The gain was 1-2 MPH. I installed the same exhaust on a Nordic Rage with a 454 MPI 385HP and saw no gain without a computer re-calibration.