RBT

I have a sleeper boat project. It is a Sea Ray Pachanga 22 with a 502.
The motor started as a GM502/502, it has an upgraded valve train from a 525 EFI merc ( new ) cometic head gaskets, a victor JR intake and an 800 holly.
The existing exhaust is an Imco system. As soon as the exhaust leaves the manifolds it is 3.5" ID. This travles back toward the transom, then makes an 90 degree down turn drop about a foot, then heads out to the sides through 4" ID mufflers, then 90 degrees out the back in the stock sea ray location.
I was thinking of having Lightning mfg build me a set of headers. I figure the 4"id of them has to help.
Any thoughts?
Also I need the cam specs for the merc 525efi so I can tell them what it is... I don't need any reversion issues.

Thanks

RBT

Oh I should mention that the motor was dyno'd and in stock form it made 490ish hp, with the cam and intake upgrages it made 564hp. Dyno headers, no pullies.

Thanks

RT

2 Trick Rick

That will be one killer Pachanga! I dont know the specs but that sounds like a great project boat and like you said a monster sleeper.

rmbuilder

RBT,
525 EFI
298º/306º @ .005"
236º/244º @.050"
.610"/.632" Lift Valve
114º LSA
Bob

RBT

Thanks
Yes it is a sleeper, I got sick of having another boat that nobody would race, so I built this for fun.
Right now it run's high 70's on GPS. About 77-78 every day. But with a stock HP 500 flame arrestor is was 1.2 mph faster than the oval on it right now ( new arestor showed up today ) and the HPI mufflers cost another 2mph.
I was hopeing to pick up a few with more exhaust flow.
I am also gonna work on the bottom. Sea Ray added a hook to the boat between the first and second strake, I am gonna knock it off and square up the edges, and finally add a 2" shorty imco and a lab 28 bravo. I am hopeing for 83-85 mph.

Thoughts
Thanks

RT

Cole-One

How did your project turn out I'm doing my 2nd pachanga now.