Re: Exhaust Riser gasket change
 

Thanks for all the input guys.

I appreciate it.

Re: Exhaust Riser gasket change
 

Hey Fund,
How are the manifolds working out for you?
I haven't bought a set yet, but I'm planning to soon.
Mine are shot.

Paul

Re: Exhaust Riser gasket change
 

They seemed to work out ok once the mating surfaces were cleaned up.

Ended up running the boat for a few hours (enough to know that the job had beed successful).

Then last week I sold the boat.

Have been too busy to use it.

My only advice to someone considering the GLMs would be that they should expect to have to clean them up and that they are slightly larger (in my case anyway) than the stock. Be aware in tight twin apps.

Also... supply your own hardware.

I had to change a set of studs to bolts to get one side on.

I also would recommend using the Copper Spray a Gasket to help fill small voids in the castings on the mating surfaces.

Re: Exhaust Riser gasket change
 

Thanks for the info.
Were you able to use the studs from your original manifolds, or were they the wrong length?
Are you going to be getting another boat?

Paul

Re: Exhaust Riser gasket change
 

Fund Razor,

Guess your out of boating for the season...Didn 't take to long to sell it.

Did you notice any speed or performance improvement over the stock manifolds?

Re: Exhaust Riser gasket change
 

I used the studs, but backed them out using a second nut and slipped them into the manifold before I tried to line it up.

I used a sling made of bungees to suspend the manifold near the block so I could have a hand free for getting the "bolts" started. Only had to do this with one manifold. One of the inners obviously.

I'm sure that I will get another boat sometime.

Not sure what it will be.

Re: Exhaust Riser gasket change
 

Yep. Taking the rest of the season off. Maybe catch a couple rides.

I would say that the cast ones that I bought didn't exactly hurt the performance but there wasn't a huge gain. Didn't get the chance to trim the boat to the moon and go for ultimate max WOT but my sense from running it a little is that I picked up one or two mph maybe.

Might have gone from 52mph to 53 or 54, on gps. All other things being equal.

I can only assume from the reduced weight that the aluminums would have a larger gain.