Stroker-gctid816063

[hfxjack]

As previously posted I recently replaced my 7.4 with a 383 stroker and I could not be more pleased. Performance is outstanding. and gas mileage as fantastic. splashed on the 28th just in time for our long weekend and ran to the gulf islands. Engine was extremely happy at 3800 rpm. which gave me just shy of 24knts. at the speed I was burning at a rate of .39 nm per litre or 1.47 nm per US gallon previously i was was burning just over 1 nm per US gallon at 21 knts. Hole shot was impressive even though i avoided wide open throttle. Boat also sits higher in the water so now I have to relearn loading the boat and weight distribution. BTW I replaced my gas tank while I was at it.

[yachtman]

So in have questions....

Did you have a speed increase at the same rpm?

What hp and torque #'s does the new engine have?

Did you change propellers?

What did you have to modify to do the switch of engines?

I ask because I have 2 small block chevy engines not strokers but quench built and have about 380 hp and 400+ in torque. They also have aluminum heads ,aluminum intakes, aluminum water pump, all aluminum manifolds and risers. I would effectively be removing close to 1000lbs + from the boat

I have a avanti 3450 with twin 454s. I have been reluctant because my 454s run well. Stock for those are 330 hp and about 400 torque.

Im interested in your experience

[Download_Complete]

So pull the 454s and sell them while they still have value.

[yachtman]

"Download_Complete" post=816067 wrote:
So pull the 454s and sell them while they still have value.

And me and my sick sense of what ever wants to stroke those 454's

[builderdude]

"yachtman" post=816065 wrote:


I have 2 small block chevy engines not strokers but quench built and have about 380 hp and 400+ in torque. They also have aluminum heads ,aluminum intakes, aluminum water pump, all aluminum manifolds and risers.

liking this idea of all aluminum top end including the exhaust stuff.

Assuming it's running a part closed cooling system?

Are the exhaust elbows still cast or stainless?

Does the aluminum exhaust need to be replaced more often?

I want to build a 383 doing this just for kicks :silly: :lol:

[yachtman]

"builderdude" post=816074 wrote:

"yachtman" post=816065 wrote:


I have 2 small block chevy engines not strokers but quench built and have about 380 hp and 400+ in torque. They also have aluminum heads ,aluminum intakes, aluminum water pump, all aluminum manifolds and risers.

liking this idea of all aluminum top end including the exhaust stuff.

Assuming it's running a part closed cooling system?

Are the exhaust elbows still cast or stainless?

Does the aluminum exhaust need to be replaced more often?

I want to build a 383 doing this just for kicks :silly: :lol:

Fully closed cooling systerm. Risers and manifolds all aluminum. They have a 5 year warrantee on them.

The weight savings is about 50 lbs each manifold plus what ever is savings on the risers. The heads are edelbrock rpm aluminum. Weight savings again abou 30 lbs each. Plus all the other stuff.