Custom Manifold advice/opinions wanted

[KaGee]

I have to replace my manifolds/risers.<br />1982 OMC 3.8L V6 (229CID)<br />Here is my existing layout:<br />

<br /><br />The OEM parts are around but extremly high priced. And I want to adapt something like this:<br />

<br /><br />What do you think this guy used ? Is that an elbow/reducer? Is it an 80 degree bend? Is it just hose that goes from the elbow down to the bellhousing?<br /><br />Looking for a little "backyard" ingenuity here.

 

[rabidfish]

Re: Custom Manifold advice/opinions wanted

This is junk. for several reasons. To make a boat engine reliable, keep it simple. If you want to save cash, use the aftermarket manifolds that actually fit. They are available from your dealer/distributor. just ask him to look for them. Or: email me & I'll give you part numbers

 

[KaGee]

Re: Custom Manifold advice/opinions wanted

Ummm Rabid.... the picture is of a 3.8L... That is the OSCO OEM replacement...! GLM has a similar design... both require adaptation from a rear riser to a center riser. Neither.... as far as I know, offer a complete retro kit, which is why I am asking for some assistance.<br /><br />I have the OEM part numbers... just not willing to spend the $500- $700 a side for the project.

 

[tommays]

Re: Custom Manifold advice/opinions wanted

KaGee<br />once your past the riser/elbow as in the photo the exaust has been cooled and surface temp is no longer a saftey issue<br /><br />i cant tell from the photo but it looks they just used a 90 deg street ell and pipe to finish the run <br /><br />if you have a mcmaster carr book they have fittings in every type of material threaded,butt or socket weld<br /><br />tommays

 

[snapperbait]

Re: Custom Manifold advice/opinions wanted

for an 80* elbow http://ebasicpower.american-data.ne...er&Product_Code=OSC803030&Category_Code=ALL5C <br /><br />Might also be able to get away with using the corrigated type of exhaust hose if you need to make a bend that's not too severe...<br /><br />West marine carries rubber exhaust elbows too...

 

[Scaaty]

Re: Custom Manifold advice/opinions wanted

www.mooreperformance.org.....best made and good prices

 

[KaGee]

Re: Custom Manifold advice/opinions wanted

Thanks for the input guys.<br /><br />Snapper, I thought that was an 80*. What I have to confirm now is the diameter of the riser output. The bellhousing is 4" I believe or 3 and 7/8 or something.<br /><br />Robby, I plan on buying the GLM's from Moore.<br /><br />Tom, I'll check McMaster Carr... an elbow is an elbow. But I wonder if they have 80* bend?

 

[yoced]

Re: Custom Manifold advice/opinions wanted

The Elbow there is part of Osco kit CRR80x3.5: 80*, 3 inches in, 3-1/2 inches out, mounted on the CRR-2 riser.