adding hp

[jdcook]

I've decided after much debate to have my engine re-built (88 gm 4.3l v6). I know a guy who rebuilds both car and boat engines. He told me that he could add 50-60 hp depending on how much $ i wanted to spend.<br />I was wondering if anyone else has had this done and what the pros/cons were, and if it could actually be done. <br />any advice would be helpful, i am meeting him tommorow to give him the motor.<br />thanks....

 

[Bondo]

Re: adding hp

Depending on What you Start with,<br />50hp is Very Easy...........<br /><br />210hp to 250 hp is Possible.......<br /><br />A 4bbl. Carb,+ Vortec Heads will Just About get you there......<br /><br />I Can't think of Any Problems with having More Power.............

 

[jdcook]

Re: adding hp

amen bondo,<br />i didn't think there would be much problem, but knowing my luck..........

 

[dmorley]

Re: adding hp

Yes, it can be done. But first ask yourself if you need the HP. I've got a light aluminum cuddy and can only use the full 190 HP on pretty flat water or end up with a bruised butt.

 

[jdcook]

Re: adding hp

yes i need hp, heavy 21ft boat needs power. i haven't even had her loaded down yet. i don't need to win any races ( i like to cruise ) but would be nice to have adequate power.

 

[bluewater19]

Re: adding hp

Vortec heads roller rockers and a mild performance marine cam. Check out comp cams.<br />I have all the suff for mine I am just waitng to pull the motor to do it. My motor is a 1991 and has a weak valve spring or 2. <br />Rather than rebuild the old crappy TBI heads I bought a set of 4.3 vortec truck heads off ebay for 200 bucks. I already upgraded from the 2bbl to the 4bbl last year and it was good for 4 mph in a 19 foot heavy cuddy cab. I think I might get another ultra reliable 20 hp with the new heads cam and roller rockers. <br />good luck

 

[jdcook]

Re: adding hp

bluewater,<br />i pulled my motor last week, i'm ready to get going, what did you search for on ebay to find your heads? <br />we already planned 4bbl carb, cam, and rockers, can't wait!

 

[Bondo]

Re: adding hp

what did you search for on ebay to find your heads? <br />

I get Good hit counts using " 4.3l " Or " 4.3l Chevy "......<br /><br />I Think there's a catagory for Heads,+ Engine Parts.......

 

[jdcook]

Re: adding hp

dumb ?,<br />do you have to have year specific heads?

 

[Bondo]

Re: adding hp

The Vortec came out in 1996......<br />And, You'll Need a Vortec Manifold to go with them......<br />When looking at the Combustion Chamber,<br />You'll see the Heart Shape..... Vortec...<br />Also, the Intake face has Only 8 bolt holes....<br />Exhaust pattern is the Same......<br /><br />You'll want to go lightly with the Cam.....<br />Idle to 4500/5000rpms.....