anybody here running Large port vortecs on there SBC?

[chevybuilder18]

I was curious if im the only one here with a set. Casting # is 25534371C, 215 cc intake runners, 86 cc exhaust runners... Of coarse thats what the sheet of paper says that came with em. Had em for a year, just curious if anyones had good with em
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[Scotty-D]

I never have, but thats a stout set of cylinder heads you got there. If I remember right they flow around 250cfm on the intake side @.500 lift, and peak at 280 cfm @.600 lift out of the box. Pretty impressive considering they do it with a 2.00 intake valve.

I'd like to have a set of them myself.
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['82 steppin]

Im running 200cc intake port 2.02/1.60 valves and 80cc exhaust port on my camaro they are Edelbrock E-tec heads
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[king-918]

All stock vortecs for 350 SBCs Are really the same heagic is the chamber and intake runners

http://www.carcraft.com/techarticles...e/viewall.html
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[king-918]

I'm building a vortec at the moment
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[Scotty-D]

Guys, the heads he has are Gm performance parts Bowtie vortec heads. They are not the same vortec heads that came on the 350's.

http://m.summitracing.com/parts/nal-25534446
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[chevybuilder18]

Originally Posted by Scotty-D

Guys, the heads he has are Gm performance parts Bowtie vortec heads. They are not the same vortec heads that came on the 350's.

http://m.summitracing.com/parts/nal-25534446
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thanks scotty d, these are very confused with 906s or the other castings, these are 371C's just really curious if anyone on here runs these, and has good performance on both top and bottom, of coarse vortecs ALWAYS favor torque, but my issue is if these 215cc monsters will produce 500 Hp (going on my 406 sbc) without streetability issues on pump gas, and still pull stumps
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[chevybuilder18]

Originally Posted by '82 steppin

Im running 200cc intake port 2.02/1.60 valves and 80cc exhaust port on my camaro they are Edelbrock E-tec heads
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How much torque you producing? Cranking psi aka Dynamic comp ratio, yours can handle much better since there aluminum. I dont plan on going the distance over 180 cranking psi for the engines sake, bc mine are iron large port vortecs, there similar to the fast burns but iron.
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[Trick76]

the critical question is: are there 2 topless dudes in the first pic??

[3r!c84]

Originally Posted by Trick76

the critical question is: are there 2 topless dudes in the first pic??

ahahahah

[BigBlocksRule]

I have a set, planning to run 'em on a 406. What are you going to do about an intake? A typical Vortec won't fit, there's not enough meat to port it to fit. I found a single plane that's made for 'em, but it will still require removal of almost 1/4" of material just to match 'em.
Yours should have the "D" shaped exhaust port, that was one of the last refinements they made.

[chevybuilder18]

Originally Posted by Trick76

the critical question is: are there 2 topless dudes in the first pic??

lol yes unfortunatley i got really excited and started snapping photos once i woke up and recieved them. Lol no amount of time, i just rushed on site lol
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[chevybuilder18]

Originally Posted by BigBlocksRule

I have a set, planning to run 'em on a 406. What are you going to do about an intake? A typical Vortec won't fit, there's not enough meat to port it to fit. I found a single plane that's made for 'em, but it will still require removal of almost 1/4" of material just to match 'em.
Yours should have the "D" shaped exhaust port, that was one of the last refinements they made.

Yes it does have the D shaped exhausts, the curve in the "D" is facing the roof of the ports, and these arent small.. and i figured i could pull of one of Wieands street warrior dual plane intakes, since car craft did it with there budget build. I dont know what it would take to match em up properly though. Seems to me this intakes a bigger version of the Edelbrock performer, since the operation range is posted from 1800- 6400 rpms.
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[chevybuilder18]

or i could save the time and money, buy GMs large port vortec dual plane aluiminum intakes specially made for these heads. Dart has some heads that are similar, 2.02 int. 1.60 exh. And 72 cc chambers for flat tops, they produced 525 horses with there heads on SHP 400, one of these days ill have one!! 1500 bucks for a roller 400! Hell yea!! But anyway what im trying to say is they have heart shaped chambers, and raised ports. They did have a dual plane intake however. But the single plane put the most out so far, maybe thats my root to start with is a single plane.... But i only have a cast steel crank!!
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[chevybuilder18]

do you guys think spayed mains, a well balanced steel crank and a half filled block can handle 6 grand??? If so i might consider this Single plane intake..
Wish i had scats forged crank thats internally balanced
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[BigBlocksRule]

Well, the single plane was supposedly made for these as well but will require a good bit of grinding to match the intake ports of the heads. I haven't seen one of the dual plane intakes, I'd like to see if they have larger ports than the single. With this size engine and the amount these heads will flow, I don't think you'll lose enough on the bottom end with a single plane, it might actually make it more streetable by moving the torque band higher.
As for the ability of the parts to handle it, I've known a lot of guys with factory crank and rods that spun 'em higher than 6K!

['82 steppin]

Sell those heads and get AFR
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[BigBlocksRule]

^ I'll be glad to...if you'll step in and pay the difference which is HUGE.

['82 steppin]

Why get a big headache over the intake manifold and you will get less power from tose heads
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[BigBlocksRule]

Those heads are well under a grand...AFR's are well over 2 grand. With a little tweaking, these will make as much power as most factory 400 blocks can handle.

[chevybuilder18]

Originally Posted by BigBlocksRule

Those heads are well under a grand...AFR's are well over 2 grand. With a little tweaking, these will make as much power as most factory 400 blocks can handle.

Well you guys i have specs on these large port iron vortecs, price to power ratio is very big, let me remind you these heads flow 282 cfm at 0.550.... A lil clearancing on these and ill have 1.6 ratio roller rockers matched with the Manley racing valves ive bought.. These are in the same league as those AFRs, for $685 for a set of bare, i call them budget AFR aluminum $2000 head eaters...
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[chevybuilder18]

Originally Posted by BigBlocksRule

Well, the single plane was supposedly made for these as well but will require a good bit of grinding to match the intake ports of the heads. I haven't seen one of the dual plane intakes, I'd like to see if they have larger ports than the single. With this size engine and the amount these heads will flow, I don't think you'll lose enough on the bottom end with a single plane, it might actually make it more streetable by moving the torque band higher.
As for the ability of the parts to handle it, I've known a lot of guys with factory crank and rods that spun 'em higher than 6K!

im believing the single plane is where its at. I forgot to mention this before its not a factory 400.. The iron crank and cast rods are being replaced with eagles cast steel crank and eagles 5.7 inch SIR 5140 forged I beam rods. Pistons by keith black, made for the rods.
The block has 2 bolt original but now its splayed with eagles billet main caps. Lost one of the original main caps. And ill have the caps torqued on with main studs. But i wasnt finished about the block. I have it filled a lil over a street fill with moroso block filler. Maybe i can pull off the 6500 rpms.
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[spencer_41188]

im running 225cc intake runners

[INSIDIOUS '86]

Originally Posted by chevybuilder18

Well you guys i have specs on these large port iron vortecs, price to power ratio is very big, let me remind you these heads flow 282 cfm at 0.550.... A lil clearancing on these and ill have 1.6 ratio roller rockers matched with the Manley racing valves ive bought.. These are in the same league as those AFRs, for $685 for a set of bare, i call them budget AFR aluminum $2000 head eaters...
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Very good bargain for the vortechs but afr heads have more flow through the curve than most aftermarket heads ever will. This means that the cylinders full more before peak lift/flow happen. That essentially means you can run a smaller duration cam on afr and get more power and streetability vs a longer duration cam and heads that don't have as much flow curve.

Although those vortechs look like an awsome head. If they were aluminum they would truly be in a league of thier own
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[paulspickupparts]

One of the mags did an article on this vortec head. Not the 062 or 906 (good budget heads also) but the higher end GM Bowtie Vortec. They rated them high and are a little more heavy duty than the original vortecs . Also the valve train stuff is ready to go . You don't hear a lot about them as they kind of get lost in the overflowing head world right now. A lot of people are buying the cheap chineeaey aluminum heads thinking silver is better. The chineeasy copycat a good set of heads made in the U.S. but even copycat the name to unsuspecting buyers. I would take these over any chineeasy head and may be one of the best iron heads out there. With that type of flow number and most any cam on a 400/406 sbc would be awesome. Type in 406 Chevy Impersonator on Google .Should find a Chevy High Performance build. Sub this pair of heads for the original vortecs or in their second build the AFR's (like to have a pair but cannot afford) and think what you would have. Buy a few sets of tires . You will need them.