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  #31 (permalink)  
Old 03-25-2013, 10:48 AM
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Quote:
Originally Posted by ap72 View Post
Here's a good set of heads for a 4" bore,
This is my 215cc offering
he also offers these heads,
Pro-Filer ECONO

which are better for a larger bore. Either head is 600+hp capable. For the intake, on a street runner I would run the 7137 Edelbrock intake.

The heads/intake combo would be about 2 grand but then you need injectors, throttle body, fuel rails, etc.

The power comparison compared to a marine intake with fastburn heads isn't even close, BUT you have to invest in a completely new intake manifold system, which isn't cheap.
I do like that 7137 intake, I was looking at its Vortec brother in the past, for use with the Largeport Bowtie Vortecs.

Those heads look like they are serious parts. Do you have personal experience with that company? HAve you used these parts?

This is starting to look like a higher rpm setup now.

Any opinions on converting a 2 bolt block to splayed mains, or would stock 4 bolt mains suffice? Would you take 2 bolt mains to 7000rpm?

Thanks again.

peace
Hog
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  #32 (permalink)  
Old 03-25-2013, 12:02 PM
How fast is fast enough?
 
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Quote:
Originally Posted by Hogg View Post
I do like that 7137 intake, I was looking at its Vortec brother in the past, for use with the Largeport Bowtie Vortecs.

Those heads look like they are serious parts. Do you have personal experience with that company? HAve you used these parts?

This is starting to look like a higher rpm setup now.

Any opinions on converting a 2 bolt block to splayed mains, or would stock 4 bolt mains suffice? Would you take 2 bolt mains to 7000rpm?

Thanks again.

peace
Hog
Personally I won't spend that much money on a sbc platform when the gen 3/4 stuff is so much better but there are MANY people who have nothing but good things to say about speir and his products. you can find him on speedtalk.com. If you're looking at 7,000 rpm then the heads I linked too will be too small, they're more suited to a hot street 383 than a more race style set up.

On the blocks, rpm, and rotating assembly- it depends a lot on weight and balance.
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  #33 (permalink)  
Old 03-25-2013, 05:32 PM
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Quote:
Originally Posted by Hogg View Post
I do like that 7137 intake, I was looking at its Vortec brother in the past, for use with the Largeport Bowtie Vortecs.

Those heads look like they are serious parts. Do you have personal experience with that company? HAve you used these parts?

This is starting to look like a higher rpm setup now.

Any opinions on converting a 2 bolt block to splayed mains, or would stock 4 bolt mains suffice? Would you take 2 bolt mains to 7000rpm?

Thanks again.

peace
Hog
A stroker crank and 2-bolt caps @ 7000 rpm is an open invitation to cap walk.

To run the rpm a cam in the 250 degree @ 0.050" lift range is going to use, you are going to want all the stiffness you can get. Splayed caps would be a given for me. You might get away w/factory 4-bolt cap arrangement w/good caps and aftermarket fasteners, but the wider register that the splayed caps can give is a real plus IMO.

2-BOLT OEM BLOCK


4-BOLT OEM BLOCK


4-BOLT SPLAYED CAP OEM BLOCK Using Milodon Caps


4-BOLT SPLAYED CAP FULL WIDTH REGISTER BOW TIE BLOCK
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  #34 (permalink)  
Old 03-28-2013, 12:34 PM
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Originally Posted by ap72 View Post
Personally I won't spend that much money on a sbc platform when the gen 3/4 stuff is so much better but there are MANY people who have nothing but good things to say about speir and his products. you can find him on speedtalk.com. If you're looking at 7,000 rpm then the heads I linked too will be too small, they're more suited to a hot street 383 than a more race style set up.

On the blocks, rpm, and rotating assembly- it depends a lot on weight and balance.
The heads you suggested were making peak power at 7,000 rpm, the other was making 588@6500rpm which would make for a 7000rpm or so shift point.

I originally stated a 6500 rpm redline.

OK thanks for your input, looks like this guy makes some good stuff.

Everytime I get looking into combinations, it always looks like it is less expensive, and less involved going up to the GEN 3/4 platform.

peace
Hog
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  #35 (permalink)  
Old 03-28-2013, 01:34 PM
How fast is fast enough?
 
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Originally Posted by Hogg View Post
Everytime I get looking into combinations, it always looks like it is less expensive, and less involved going up to the GEN 3/4 platform.

peace
Hog
It usually is.

You can pick up a running 5.3L for less than $500. throw on a cheap turbo with some injectors and tuning and you're at 600+hp.

Or go NA with a cam and headers and you're at 425+hp.

Not to mention the much improved durability, mpg's, and engine controls.
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  #36 (permalink)  
Old 03-28-2013, 01:47 PM
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Originally Posted by cobalt327 View Post
A stroker crank and 2-bolt caps @ 7000 rpm is an open invitation to cap walk.

To run the rpm a cam in the 250 degree @ 0.050" lift range is going to use, you are going to want all the stiffness you can get. Splayed caps would be a given for me. You might get away w/factory 4-bolt cap arrangement w/good caps and aftermarket fasteners, but the wider register that the splayed caps can give is a real plus IMO.

2-BOLT OEM BLOCK


4-BOLT OEM BLOCK


4-BOLT SPLAYED CAP OEM BLOCK Using Milodon Caps


4-BOLT SPLAYED CAP FULL WIDTH REGISTER BOW TIE BLOCK
Those Milodon caps look beefy. I looked them up and they are $230 and come with bolts.

Thanks for your suggestions.

peace
Hog
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