Been told to put a V6 prop shaft in my V4 case, some work required but will work. Then re-hub all my props V6. Good to go.Quote:
Originally Posted by 71V153
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Been told to put a V6 prop shaft in my V4 case, some work required but will work. Then re-hub all my props V6. Good to go.Quote:
Originally Posted by 71V153
Fwiw my 88 "extra" special's a conglomeration of parts from '75 to '92.
(Block is '77 140.)
Had an old timer down here call it a "shop" motor. Asked him what he meant and he said, "Looks like ya swept up the shop and put a motor together."
I can deal with that ...
First splash:
www.youtube.com/watch?v=EoCbWvKZSxg
Ok folks this has gone way beyond what the thread started as.
Not bad with 2500 views there must be other folks like me wanting to mod there V4s
I will post some new threads on each part of the mod.
Hopefully we can all contribute a little to have a very quick reliable lake motor, well thats the plan anyways.
Thanks to all who added to this thread with you guys there would be no forum.:cheers:
Just a catch up on my speed It may have been way outQuote:
Originally Posted by 58Evinrude
Nice engine 71 can you tell me about the holes drilled in the mid section for the exhaust ?Quote:
Originally Posted by 71V153
I found the 1977 115 intake to be better than some of the other intakes. Its longer between the reed blocks and the carb mout. Makes for better flow path from the carbs to the reeds because the reed blocks are offset from the carb intake. You need to mill off a part of the casting on drivers side of the casting that seems to have no purpose. Also putting on the 78+ intake silencer is much better. Need to rework the throttle linkage mounts on the silencer too for that because they are different from the 73-77 linkage mounts. I put the 1.375 carbs on mine too. This was all on a 135 v4 with bubble back and high comp heads.
I built a horizontal reed intake for a v4 too out of billet aluminum but haven't finished that engine. Doing a new programmable ignition for that motor too but have way too many projects.
Yes the later intakes are an inch taller.
bigger gap from reeds to carb slows throttle response
power That may be true...but doesn't it create higher velocity to the case and the intakes to get more fuel to the cylinder quicker. Better at higher rpm. I think we can compare to tunnel ram on 4 strokes. GaryQuote:
Originally Posted by powerabout
I'll try to remember that ...Quote:
Originally Posted by powerabout
www.youtube.com/watch?v=e7dQI0Kj77A
Will a 77 140 with that later front do more and what rpm?
The taller intake has a much better flow path from the carb to the reed cages. Looking in the shorter intake half the reed cage might as well not even be there because the flow path from the carbs takes a torturous 90 degree turn to reach the furthest reed petals.
This is the intake i like. Its sort of an intermediate to the one posted above because the throttle linkage doesn't connect to the intake. It attaches to the silencer like the old style manifolds.
http://m.ebay.com/itm/388632-0388632...257Ciid%253A24
And you use this silencer.
http://m.ebay.com/itm/1978-79-80-198...%257Ciid%253A9
Go waterskiing Behind an old 125 or 135 then any 140 and you'll know.Quote:
Originally Posted by 71V153
They were designed when you could get good fuel
Ain't that a fact!Quote:
Originally Posted by powerabout
I prefer the linkage bolted on the intake. Just find it easier to work with? Plus later models have the fuel recirc lines. I do think those help em idle better. And not 'load up' in long no wake zones.Quote:
Originally Posted by Umassot50