havoc_squad
Senior Chief Petty Officer
- Joined
- Mar 5, 2011
- Messages
- 739
On a 1991 V4 crossflow, if I change to using a pulse pump and cap off the VRO vacuum port with NPT cap, do I have to fabricate a new fuel rail/manifold so it feeds from the bottom or can I make a NPT U with barbs on it to prevent constriction at the bends so I can use the existing VRO fuel manifold?
If anyone has any good suggestions for products to handle that bend, I'm all ears.
I would like to avoid causing any fuel delivery issues, not sure if it having to go from the pulse pump up, 180 degrees and down the VRO fuel manifold will cause issues.
This is a new to me acquisition on a different boat that the previous owner did a poor job converting and I'd rather use pulse pump this time and not mount a Max Rules one on the air cleaner.
I definitely do NOT want to pay $110 for an SPL fuel manifold rail on Ebay when the one I have is in working order. Stupid expensive price.
I've already done the compression check on it before I bought it which were acceptable even numbers and test ran okay. I plan to do a leak down test to be sure before I spend a lot of coin and if those numbers look good I'll be pulling a bunch of stuff off and doing the same important OMC fuel and cooling system servicing that I did on the previous V4 crossflow I had.
Worse case this is a parts motor with good lower unit, midsection, and trim system ready for a 1991 or later crossflow powerhead assembly that runs good. Still tons cheaper than a GM mercruiser repower. Not my first rodeo with this model series.
If anyone has any good suggestions for products to handle that bend, I'm all ears.
I would like to avoid causing any fuel delivery issues, not sure if it having to go from the pulse pump up, 180 degrees and down the VRO fuel manifold will cause issues.
This is a new to me acquisition on a different boat that the previous owner did a poor job converting and I'd rather use pulse pump this time and not mount a Max Rules one on the air cleaner.
I definitely do NOT want to pay $110 for an SPL fuel manifold rail on Ebay when the one I have is in working order. Stupid expensive price.
I've already done the compression check on it before I bought it which were acceptable even numbers and test ran okay. I plan to do a leak down test to be sure before I spend a lot of coin and if those numbers look good I'll be pulling a bunch of stuff off and doing the same important OMC fuel and cooling system servicing that I did on the previous V4 crossflow I had.
Worse case this is a parts motor with good lower unit, midsection, and trim system ready for a 1991 or later crossflow powerhead assembly that runs good. Still tons cheaper than a GM mercruiser repower. Not my first rodeo with this model series.
