sportsman II or procomp??



sportsman II or procomp??

Postby grumpyvette » May 21st, 2014, 9:33 am

vette73 wrote:Came across a set of sportsman 2 iron cylinder heads that I am thinking of putting on my 383 Stroker ..
200 cc runner 64 cc which have been shaved down to 61cc for added compression..I don't know too much about head design but the have new Manley guides and springs..
I'm looking for just street muscle with the occasional trip to the strip.....Are 200 cc runners a little too big or should I stay with the pro comp 190 cc aluminum which I have on my 350 now?



NEITHER head is what I consider ideal, either head should allow you too easily reach 400 hp on a correctly built 383, we all work on a budget, and these are both examples of heads on the lower cost end of the range in SBC heads, if you select the correct other matched components, and match the drive train to the power band so you can use that torque curve effectively, the cylinder head port size alone of either head has a good deal LESS effect on the eventual results and less to do with the eventual combos characteristics that the engine compression,ratio ,cam timing,and the heads flow numbers and cam lift and LSA, and exhaust scavenging, and intake design you select will.neither the current 190cc pro=comp aluminum heads nor the iron sportsman II 200cc heads,have a huge advantage, I would not be in a big hurry to spend money on the swap.
look at the charts below, both heads , in stock out of the box form have similar flow numbers, and both heads can be significantly improved with careful port work.

http://users.erols.com/srweiss/tablehdc.htm

http://www.superchevy.com/technical/eng ... aders.html

http://purplesagetradingpost.com/sumner ... on%20Eagle

PERSONALLY ID SUGGEST SPENDING A BIT MORE AND STEPPING UP TO A BIT BETTER HEAD LEVEL, especially if I had serious power as my goal

http://www.jegs.com/i/Brodix/158/102100 ... oreDetails

Image

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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: sportsman II or procomp??

Postby philly » May 21st, 2014, 1:36 pm

ive been meaning to use a set of bowties on something, seems like a great cylinder head on paper, hopefully in practice it will be just as good.
-phil

There's never enough money to build it right, but there's always enough to build it twice!
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Re: sportsman II or procomp??

Postby grumpyvette » May 21st, 2014, 3:33 pm

THOSE ARE 215CC VORTEC HEADS linked too, not the standard bowtie heads, or the common 177 cc vortec heads built for low speed torque
those large port vortec heads , have the potential to make decent power, but they need to be matched to a cam with the lift and duration that lets them breath and an intake designed to match the heads port flow, those heads really need a port clean up and a decent roller cam and intake like this one that matches them to work correctly,along with roller rockers and a rocker stud girdle, a decent ignition, etc.

HERES AN ARTICLE WHERE THEY TOOK THOSE LARGE PORT VORTEC HEADS AND MADE 632 HP

http://www.chevyhiperformance.com/techa ... ck_engine/
http://www.superchevy.com/how-to/148-05 ... hotos.html
viewtopic.php?f=52&t=266&p=40004&hilit=215cc+vortec#p40004


its almost MANDATORY you use this intake,as its designed to match the heads, put them on a 406 SBC forged short block with 11:1 -11.5:1 compression and all forged components, a good 8 quart baffled oil pan with a windage tray, ID use 6" connecting rods
Image
http://www.jegs.com/i/Edelbrock/350/281 ... 0000719719

and Id certainly suggest port and bowl clean up work, at least 11:1-11.5:1 compression and a cam in the 245-250 intake duration range like a
Image
and those heads can produce some decent results with mild port work and tuned long tube tuned headers
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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