What heads would you use?
01-06-2008 | 11:38 AM
#11
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Joined: Sep 2007
Posts: 176
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From: Toronto, Canada
Rect vs. Peanut
Sshh, don't tell raddiction that, I can't have him rompin past me laughing his ars off 
My setup is similar to yours NW but my cid is 470. Rect port heads, dart sp intakes last year with 800dp. Runs pretty strong and I have been happy with them. Couple years back I ran same edelbrock alum rect port heads with dp performer intakes. She ran better then. I actually lost 2mph going with the single plane. Now I am going with small blowers and dominator carbs. If I go back to n/a it would be with the dp peformer intakes. I have 2 blue hp 500 takeoff carbs to sell (800dp) if you are interested. I would definately dump the qjets and I have spent a lot time an money trying to make they work, they just can't match the holley.
Based on your rpm goal, single plane is a no brainer and I think the dominators a good starting point.
BT
My setup is similar to yours NW but my cid is 470. Rect port heads, dart sp intakes last year with 800dp. Runs pretty strong and I have been happy with them. Couple years back I ran same edelbrock alum rect port heads with dp performer intakes. She ran better then. I actually lost 2mph going with the single plane. Now I am going with small blowers and dominator carbs. If I go back to n/a it would be with the dp peformer intakes. I have 2 blue hp 500 takeoff carbs to sell (800dp) if you are interested. I would definately dump the qjets and I have spent a lot time an money trying to make they work, they just can't match the holley.
Based on your rpm goal, single plane is a no brainer and I think the dominators a good starting point.
BT
Agreed about the Q-Jets and Holleys, but $$ are tight and I have other priorities right now. (However, if you're only looking for a wink and a slap on the a$$, PM me). Take a look at what I started with...
What cam are you running? I'm probaby blowing bubbles thinking I can have both ends of the spectrum with the rect heads, but I have my eye set on the CC XM284HR as soon as I can afford the $2k upgrade.
I have the original 454 7.4l GM cams and a couple of CC 286H I want to check out.The 286, although flat tappet, will give me an idea of the trade-off between bottom end torque and WOT with the rect heads.
My blocks are with Active Performance for machining now..I plan on some lightweight 9.5:1 domes with H-Beams so I'm hoping the increased compression will overcome some of the low end "bog".
01-06-2008 | 04:37 PM
#12
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Joined: Nov 2001
Posts: 3,393
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From: IBX
I run the comp cams cb xm 278h-12 cams. Flat tappet you know. Approx 9.5:1 compression. They run real strong up to 5400 or so. Bravo drives won't last going too high rpm wise. You should consider that NW.
Where you at Raddiction?
Where you at Raddiction?
01-06-2008 | 06:04 PM
#13
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Joined: Aug 2004
Posts: 1,335
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From: Riverview, Michigan
I have done something very close to this motor project, made 550HP/600TQ at 5400 with less CI and a stinking Air Gap dual plane intake. Did not spend a bundle getting it either.
Second best recommendation (IMHO):
Custom CAM by RMbuilder
Carb calibrated by Nickerson
01-06-2008 | 07:06 PM
#14
Michigan Mad Man
Joined: Feb 2003
Posts: 1,172
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From: Ruby, Mi
01-06-2008 | 08:10 PM
#17
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Joined: Aug 2004
Posts: 1,335
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From: Riverview, Michigan
Hey Tyler, do you mean these heads?
http://www.sonnysracing.com/products...portheads.html
Ok, fun stuff put aside, you and Mr. Gellner have tons of experience in the marine performance arena. How would you score a Dart Iron Eagle vs. an AFR counterpart? I.E. similar runner and cc volume.
http://www.sonnysracing.com/products...portheads.html
Ok, fun stuff put aside, you and Mr. Gellner have tons of experience in the marine performance arena. How would you score a Dart Iron Eagle vs. an AFR counterpart? I.E. similar runner and cc volume.
