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Iron D-Port Heads All iron d-port heads, flow number and performance results

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Old 04-11-11, 06:58PM   #1
LMS-RACER
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Default Performance Numbers with D-Ports !!

Everyone,
Alright Guys, since this is a D-Port forum. I'd like to know some numbers.
Naturally Aspirated..... Who's done what ?

Dyno Numbers.. Although not the True Test of an Engine's Merits.
( Unless their Accompanied with E.T. Slips.)

E.T. Numbers with Vehicle Specifics.

"NO B.S." Please.

Larry S.

www.precisionautomotivespecialists.com
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Old 04-12-11, 01:09AM   #2
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I ran a +.030 400 years ago with a set of #16 D ports that maxed out at 209 CFM @ .600 with a Warrior intake and solid lifter cam in a 3400lb car.
Ran best of 10.39 @ 129mph
and 10.40-10.60 depending on weather and track conditions.
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Old 04-12-11, 02:03AM   #3
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Smile My 061 Dport performance #'s

Here are my #'s. Hope to do better this year.
RWHP 503(only got one run on chassis dyno)
#'s in signature were at DA of 2900ft
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Old 04-12-11, 08:12AM   #4
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MB125- I am assuming that your combo when "I ran a +.030 400 years ago with a set of #16 D ports that maxed out at 209 CFM @ .600" was with unported heads? If I am not mistaken, stock heads flow 190-200cfm factory?
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Old 04-12-11, 09:29AM   #5
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Default WOW !!

Mb125,
That's Impressive..

Apparently you were able to make right at 600 H.P. with a set of Heads that Flowed 209-cfm @ 28" h2o.
That's Naturally Aspirated with a Solid Cam, not a Roller Cam to boot.
( 2.85-H.P./CFM.)

What Gives ?

Larry S.
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Old 04-12-11, 04:47PM   #6
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The heads didnt have much work, just a clean up and good valves and valve job. I used a 3" 4 hole spacer on top of the warrior which produced the best ET's. I used a 4.56 gear and 32" tire and crossed the line around 6000 RPM.
the engine had 12.75-1 compression.
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Old 04-12-11, 07:36PM   #7
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Default What Type of Piston ?

Quote:
Originally Posted by Mb125 View Post
The heads didnt have much work, just a clean up and good valves and valve job. I used a 3" 4 hole spacer on top of the warrior which produced the best ET's. I used a 4.56 gear and 32" tire and crossed the line around 6000 RPM.
the engine had 12.75-1 compression.
Mb125,
What type of piston did you use and what was the dome volume ?
With a 32" tall tire, I'm assuming that the car was at least a back-half car.

The power to weight ratio still seems to be way off.....

Thanks for Posting,
Larry S.
Made in the USA !!
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Old 04-13-11, 01:06AM   #8
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Don't remember what the actual volume of the piston dome took up but the chambers were milled to 69cc and i was using the standard felpro gasket, i think the piston to deck was around .020 so the rest can be calculated.
Yes it was a back half car.
I have a new engine in the works with another set of 16's we shall see how that works out.
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Old 04-13-11, 01:00PM   #9
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About 16 years ago I bought a very nice set of Goodale/McCarthy '69 #16 d-port heads that were 280+ cfm.
I used them on two combinations, a 560hp 412cid and a 626hp 462cid engine.

My Trans Am at about a 3750 lb race weight with the 412 combo ran a best of 11.45 at 118 mph. It used a Performer RPM intake and 251/262 at .050" solid roller. Later with a 4.210 stroke crank, Victor intake and 264/271 at .050" roller it ran a best of 10.797 at 124.06 mph.

The car was street driven with both combos but due to high compression with the iron heads I had to add race gas in to do so.
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Old 06-28-11, 09:37PM   #10
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I had a set of 670's that flowed 270 cfm on a 4" stroke 455 that ran 11.2 @ 119 on motor and 10.1 @ 136 on spray weighing in at 3900 lbs.The cam was a Lazer with 265int.277exh.ground on 110 with .590 lift.Any more details on some of previously posted examples?
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Old 08-22-11, 11:25PM   #11
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I'm running a set of '092' heads on my Pontiac 350. The smog bump is still in place and there has been no port work done to them at all. Valves are stock diameter (1.920" x 1.660" IIRC) and they were bolted to my 65,000 original mile Pontiac 350, along with a UD .466"/.467" - 220/226 @ .050" - 111.5 LSA Hydraulic Flat Tappet installed on a 107.5 ICL.

The stock, no valve relief 350 pistons are .024" down in the hole and I am using a .039" gasket. Cranking compression is 185-190 psi.

I have no idea what these heads flow, but with a Q-Jet and 1-7/8" headers, it made 311 RWHP and 325 lbs RWTQ.

I have read that these 092's flow very little on both intake and exhaust. Anybody have flow numbers for the 092 heads????....Robert
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Old 08-31-11, 01:37PM   #12
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Heres a link to a PY thread on D-ports. Some pretty impressive numbers.
http://forums.performanceyears.com/f...d.php?t=584614
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Old 08-31-11, 08:48PM   #13
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Dave Johnson in the old White Warrior went 9.38 at 7 lb per ci N/A years ago.Tom
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Old 08-31-11, 08:49PM   #14
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That was with a pair of 1963 980 SD heads that I believe flowed 290 with a 2.06 intake.Tom
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Old 08-31-11, 09:13PM   #15
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Do you know what Dave's car weighs, that's some pretty damn good ET numbers out of iron D-port heads.
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