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Edelbrock Heads Edelbrock head owners can give there opinions along with their track results this includes Wide Ports

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Old 06-22-12, 11:22PM   #1
ponjohn
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Default SD 325 cfm heads

Anyone have any power numbers for Dave's 325 CFM old school e-heads?

Looks like a great alternative.
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Old 06-23-12, 12:04PM   #2
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Don't have any power numbers, but what I've seen from those who run 325 heads anywhere from 650-700 HP.
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Old 06-25-12, 03:09AM   #3
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Dave @ SD is the man.
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Old 07-11-12, 12:00PM   #4
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I have some e heads i need done. How can i contact this guy?
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Old 07-11-12, 12:22PM   #5
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I have some e heads i need done. How can i contact this guy?

www.sdperformance.com
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Old 07-11-12, 07:57PM   #6
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He can plop them on his CNC machine and get you 340cfm on a stock block bore and 350 cfm on a aftermarket block bore. With no offset anything.
Those heads are the best bang for your buck in the Pontiac world.
You can get 750+ on pump gas with them easy.
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Old 08-02-12, 03:19AM   #7
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YAY!!!! I'm ordering a set of these heads for my 455 build on Friday! I've been talking w/ Dave Bisschop and he's been really helpful- I'm sold.

Geno
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Old 08-02-12, 10:50AM   #8
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We had a pair of those here in May from an OK customer. He had worn out a 455 and wanted to "convert" to the 461 and wanted the heads "freshened". They were stamped "SD 325".

The only thing I noticed was the opening size. Unlike our "325" heads (we have no CNC package, ours are done the old fashioned way), these heads had the "tall" port, using the SCE gasket about 3/32" taller than the Ram Air IV opening we use for the same peak flow. I didn't "flow" the heads so I can make no comment on low- and mid-lift flow, both FAR more important than "peak" flow for power production.

We've managed 355 with the "tall" opening without going "wide".

FWIW

Jim
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Old 08-02-12, 08:12PM   #9
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Quote:
Originally Posted by Mr. PBody View Post
We had a pair of those here in May from an OK customer. He had worn out a 455 and wanted to "convert" to the 461 and wanted the heads "freshened". They were stamped "SD 325".

The only thing I noticed was the opening size. Unlike our "325" heads (we have no CNC package, ours are done the old fashioned way), these heads had the "tall" port, using the SCE gasket about 3/32" taller than the Ram Air IV opening we use for the same peak flow. I didn't "flow" the heads so I can make no comment on low- and mid-lift flow, both FAR more important than "peak" flow for power production.

We've managed 355 with the "tall" opening without going "wide".

FWIW

Jim
Jim-

What compression and what cam?
Any passes with the car?
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Old 08-02-12, 08:13PM   #10
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Quote:
Originally Posted by 72blackbird View Post
YAY!!!! I'm ordering a set of these heads for my 455 build on Friday! I've been talking w/ Dave Bisschop and he's been really helpful- I'm sold.

Geno
Geno-

Have you discussed cam options with Dave for these heads?
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Old 08-03-12, 11:03AM   #11
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Jon,

Not sure. 461 w/flat tops, 87 CC head. probably in the 10.2:1 range. I didn't have all the compnenets here. We "did" the valve job and the block work. He bought a rotating assembly from Butler. I believe he has the "old faithful" hyd. roller SD touts. Some power "left on the table", but if the man is happy with his combo, that's what matters most.

NOTE: The block was bored to 4.165" . We generally ask for the pistons to be certain we get clearance "right". The pistons were about .002" "big", so after we did all that work, he had to have the block honed again "local". He assured me, the bore size WAS what he ordered. ALWAYS supply the pistons to the shop BEFORE boring...(:-

Jim
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Old 08-03-12, 09:55PM   #12
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I'm going to run the PPR TC-02 HF at first, then swap over to the Comp "old Faithful" HR when I can put the funds together.

Ace tells me his TC-02 HF does very well with e-heads- something like 520 hp and 540 lbs.-ft. w/ stock e-heads out of the box, so I would imagine the cam will like the SD 325 cfm e-heads too.

This will be my first aluminum head, roller cam Poncho, so I have no problem going with a mild HR and getting the setup in my '72 Bird squared away and all of the bugs worked out. I'll also need to put a totally new exhaust and drivetrain in the car, so I'm in no hurry to be running a 575-600 hp/ 600 lb-ft. 455 right off the bat.

Geno
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Old 08-03-12, 10:36PM   #13
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That TC-2 is a nice little cam. You'll love the hyd roller when you go with it. 500-600 HP is nothing to sneeze at.
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Old 08-04-12, 07:49PM   #14
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Quote:
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That TC-2 is a nice little cam. You'll love the hyd roller when you go with it. 500-600 HP is nothing to sneeze at.
Absolutely. An appropriately spec'd roller will allow an easy 500-1,000 rpm if set up correctly and make REAL GOOD power.

Good luck with your combo.
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Old 08-04-12, 08:12PM   #15
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Lightbulb

The only possible concern w/ making 500-600 hp I have at this point is my bottom end- I went with the stock 455 crank and 2-bolt caps (w/ ARP main studs). If I were specing the build out today I would have spent the extra money for a forged crank and 4-bolt caps- oh well. I'm not too stressed out about it now, though- I doubt I will even be buzzing it to 5000-6000 rpm 10% of the time I'm driving it.

Geno
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