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vortec heads on a ´80 engine |
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kapla 
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 Topic: vortec heads on a ´80 enginePosted: February-09-2010 at 7:29pm |
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Is it possible to put vortec heads on a 1980 engine?
other than a new centerbolt valve cover and new intake what other parts are needed? any performance gain that worth the change? |
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<a href="">1992 ski nautique
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eric lavine
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Posted: February-09-2010 at 8:30pm |
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yes, and a fine upgrade normally, unless you can find some older .202 fuelie heads, double humps on the outside ends, you can hog out the ports to open also,
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"the things you own will start to own you"
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Waterdog
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Posted: February-09-2010 at 8:36pm |
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The intake bolts are streight down not angled. You can hog out your intake and it will work but I'd get a vortec intake. The heads are worth about 40 HP just bolting them up.
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eric lavine
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Posted: February-09-2010 at 8:40pm |
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i forgot to mention that, i thought it was the 4 center bolts?
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"the things you own will start to own you"
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Fl Inboards
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Posted: February-09-2010 at 8:40pm |
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I have a nice set of Vortec heads that I just got in on a crack block job. Also have a Carb aluminum PCM Vortec manifold with bolts all for $650.00
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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eric lavine
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Posted: February-09-2010 at 8:42pm |
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40hp for 650. cant go wrong
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"the things you own will start to own you"
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kapla
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Posted: February-09-2010 at 9:07pm |
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jody
tell me more on the heads..condition..hours.. year..are they ready to bolt on or they need some work to be done? you have the valve cover also? |
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<a href="">1992 ski nautique
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Fl Inboards
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Posted: February-09-2010 at 9:22pm |
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Motor came in with fresh water 600 hours, Freeze cracked block that still runs great, just has a 3 inch crack above the freeze plugs. Since the heads are comming off I would have them reconditioned before they go back on something else, then again thats me. Usally that runs about $75 per head. $650.00 comes with valve covers and a new never run PCM High rise dual plane intake manifold that came on the replacement motor . If you want me to have the heads reconditioned tack on another $150. You want steel valve covers or plastic?
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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kapla
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Posted: February-09-2010 at 9:32pm |
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these would be for a friend that has a volvo 290a (chevy based of course) engine from the 1980´s
a valve broke while running and ruined one cylinder sleeve and filled the engine with water..so now they are decidingwether to have the heads rebuilt or buy new... will those fill that aplication? as for the vc plastic or steel any price diference? why plastic? is it lighter? or just cheaper.. but on the other hand sound nice upgrade for my 1973 l-82 vette..are they so? |
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<a href="">1992 ski nautique
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kapla
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Posted: February-09-2010 at 9:40pm |
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exhaust manifolds bolt pattern is the same? or will need to replace?
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<a href="">1992 ski nautique
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peter1234
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Posted: February-09-2010 at 9:51pm |
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should be the same.
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former skylark owner now a formula but I cant let this place go
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peter1234
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Posted: February-09-2010 at 9:52pm |
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if its that far apart . a cam might be wise
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former skylark owner now a formula but I cant let this place go
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Fl Inboards
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Posted: February-10-2010 at 12:41pm |
The small block Chevy changed very little in nearly 50 years of production. The exhaust is the same. I have never installed late model Vortec heads on a 80's-early 90's edition Small block. I am assuming they would work just could not utilize the vortec roller lifter assembly. If one wanted to use roller motor technology one would have to go aftermarket. As far as the rocker covers I just threw up to versions of poison, both are the same price I have a number of pairs. |
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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kapla
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Posted: February-10-2010 at 2:21pm |
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good point in the lifter assy..I think they want to keep the original cam - lifter-rocker-arms (hidraulic flat tappets) is it possible to put them in the vortec heads?
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<a href="">1992 ski nautique
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eric lavine
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Posted: February-11-2010 at 9:40am |
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Yes, without a doubt
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79nautique
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Posted: February-11-2010 at 2:10pm |
YES put you might have to change push rods, I would have to ask my friend who did this on his cruiser last year if it is a direct replacement |
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kapla
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Posted: February-12-2010 at 4:08pm |
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AS far as all replies I was given here and in the corvette forum, its doable and all the old parts can be reused. Chris I´ll wait your comments on this friend..If he had to change pushrods and the lenght he put in there.
Whats is a fact it will be a significant performance gain.... |
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kapla wrote: