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Discussion Starter · #1 ·
i have a sb400 4 bolt main block and have alumn pro 1 dart heads (dont know the specs) they were sold to me for $200 so i had to buy them. but i want to make 600hp on pump gas, can anyone give me any advice on building the bottom end? i have about $2k to spend on the rotating assembly.
 

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Discussion Starter · #3 ·
i already have an air gap and a dominator, the heads are complete i just need to get the specs for them i have 4000 to spend want to send as little as i can all i have left to do is build the short block
 

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just look in the mail order rags for a forged rotating assembly.. scat, eagle etc. should do the trick without breaking the bank....
 

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I'D GO EAGLE CRANK AND ALL THERE ASSOCIATED PARTS,:yes: GOTTA MATCH THAT CAM UP,:yes:AWW HELL GO TUNNEL RAM AND PUT 2 ON THERE:devil:
 

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600 HP on pump gas with a Small block isn't as easy as some would make you believe.:no:

And I wouldn't do it in a stock GM casting. It will live for a while, but basically, you're pulling the pin on a grenade and waiting for it to go.:yes:

It's likely gonna be in a higher RPM range, requiring a LOT of converter and gear to live on the street.:yes:

That is unless it makes it artificially.:devil:
Boosted or on the funny stuff.

Parts wise, I'd shop around. Carl (CNC BLOCKS) is a Callies Compstar dealer and might be able to come in under your target budget.:yes:

I'd also call Brian at www.adperformance.com and see what he can do. He deals with Scat, Eagle, Callies and Probe.
Then there's also:
http://www.cnc-motorsports.com/
http://www.competitionproducts.com/
http://www.flatlanderracing.com/

All of which do a lot of rotating assemblies.....It just depends on who's willing to give you the best price and service.:yes:


Finally, as for your cylinder heads, find out EXACTLY what they are.....and regardless, the valvetrain will all likely have to be changed to match the requirements of the camshaft you end up with....most likely a solid roller.:yes:
They will need messaging by a GOOD porting specialist.:yes: They are gonna need to flow somewhere north of 300 cfm and have a nice FAT flow curve, etc., etc....
Your intake will have to be matched (Victor Jr., Super Victor, Bowtie, Dart, Team G, etc.) to the heads and have the plenum and port entries worked quite a bit as well.:yes:
I doubt an RPM performer or AirGap is gonna get you there.:no:
 

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600 HP on pump gas with a Small block isn't as easy as some would make you believe.:no:

And I wouldn't do it in a stock GM casting. It will live for a while, but basically, you're pulling the pin on a grenade and waiting for it to go.:yes:

It's likely gonna be in a higher RPM range, requiring a LOT of converter and gear to live on the street.:yes:

That is unless it makes it artificially.:devil:
Boosted or on the funny stuff.

Parts wise, I'd shop around. Carl (CNC BLOCKS) is a Callies Compstar dealer and might be able to come in under your target budget.:yes:

I'd also call Brian at www.adperformance.com and see what he can do. He deals with Scat, Eagle, Callies and Probe.
Then there's also:
http://www.cnc-motorsports.com/
http://www.competitionproducts.com/
http://www.flatlanderracing.com/

All of which do a lot of rotating assemblies.....It just depends on who's willing to give you the best price and service.:yes:


Finally, as for your cylinder heads, find out EXACTLY what they are.....and regardless, the valvetrain will all likely have to be changed to match the requirements of the camshaft you end up with....most likely a solid roller.:yes:
They will need messaging by a GOOD porting specialist.:yes: They are gonna need to flow somewhere north of 300 cfm and have a nice FAT flow curve, etc., etc....
Your intake will have to be matched (Victor Jr., Super Victor, Bowtie, Dart, Team G, etc.) to the heads and have the plenum and port entries worked quite a bit as well.:yes:
I doubt an RPM performer or AirGap is gonna get you there.:no:

Nicely said.:yes::yes::yes:
 

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In my 410" I run:
Stock GM 400 block w/4.145" bore. Had splayed caps installed
Ohio Crank 3.80" stroke--Now $495....$475 when I got mine
Eagle 5.85" H-beam rods--about $499...got mine used for free!
Mahle PowerPak Flat tops--$625.....wow, I paid $499 a couple years ago, they come with rings, so that helps.
Isky RR615 solid roller cam 260/268° at .050"-.615/.617" lift
Super Victor w/975 Race Demon RS
With 64cc AFR 210 heads it's just under 12-1 compression
 

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always " heard "

never had a 400 4 bolt block myself, but i always " heard " they were bad to crack ,, you can put splayed caps on it just like a 2 bolt i " heard " is the fix ,,,

a 600 hp 406 isn't " real " difficult ,, above average heads , solid roller , i'd say at least an 850 dp ,,, i'd trade the dual plane for a super vic with the dominator flange ,, the dominator may or may not be the best set up ,, but i bet it wouldn't be far from it ,,, which dominator do you have ?

I wonder about this crank 4.0 stroke pro comp crank

http://www.jegs.com/i/Procomp-Electronics/746/4056/10002/-1?parentProductId=957637

pro comp doesn't make a crank , they sell cranks other people make ,
 

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never had a 400 4 bolt block myself, but i always " heard " they were bad to crack ,, you can put splayed caps on it just like a 2 bolt i " heard " is the fix ,,,

a 600 hp 406 isn't " real " difficult ,, above average heads , solid roller , i'd say at least an 850 dp ,,, i'd trade the dual plane for a super vic with the dominator flange ,, the dominator may or may not be the best set up ,, but i bet it wouldn't be far from it ,,, which dominator do you have ?

I wonder about this crank 4.0 stroke pro comp crank

http://www.jegs.com/i/Procomp-Electronics/746/4056/10002/-1?parentProductId=957637

pro comp doesn't make a crank , they sell cranks other people make ,
With a 4.0 crank you better see what kind of clearance work needs to be done to the block before you start and the use of a small centered cam.
 
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