I plan on getting a new intake soon and I was wondering what you guys would recommend? I have a mild 406, larger than stock cam, headers, and some worked heads I might put on soon. The 400 is real torquey (sp!) down low (I can afford to lose some torque, 406ci&3.73's), but I want some upper end. So what do you think (dual v. single-brand & type)? Also a friend has an older Holley that he thinks is a 800cfm mechanical sec marine carb. I think 800 might be too big (I have a 600 vac sec now) but just wanted to know what everyone else thought. Thanks for any info.

For "out of the box" bolt up, Performer RPM and Holly 650 double pumper.
Harley

Kiknss, I'll only address what I'm qualified to. I run a 750DP on a 396 ( stock 325 hp with a cam and Edelbrock RPM ) and it's not too much carb. The 396 runs out of cam/headers at about 5850 or so. Assuming your rpm range isn't that much different the 800 isn't too big and the 600 might be too small.

My experience with a single plane was an older Holley Street Dominator on an LT1 clone. It really didn;t wake up until 3500-3800 which wasn't too good with a T350 and 2800 stall. My best luck was with a Z/28 GM dual plane. Nice runner. No low end problem and high end all the way past 6500.

Simply, if you have a 4 sp or lots of stall, the single is OK. Otherwise use a dual. The Edelbrock RPM seems to work decent on my little rat.

Does anyone have the GM part# for the alumunum Z28 intake. I can only find the cast iron one in my GMPPC. Want to check its price. Thanks

On my 406 I'm running a Performer RPM Q-JET intake on mine with a Brad Urban Carb Shop Q-jet also. You can put a Holley Square Bore on this intake also. Tons of bottom end and pulls to 5800rpm hard. If you really want to keep those Holly carbs on I would go with the 750 Double Pumper and the Performer RPM .

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Malibu 307 (aka 406 smblk)
69 SS 396(aka 454)
Wolf in sheeps skin

Kiknss, I won't check my GMPPC since you already did and it's not there. I see an ad all the time, maybe its PAW, in one of the mags for a Z/28 mani for like $90 or 119 or so.

BTW, I ran a Holley 780 vacuum and it seemed to be perfect for my revvin 350. I don't even know if they make those anymore!

[This message has been edited by Gene Chas (edited 07-21-99).]

I just yanked off my boat anchor manifold for a used Edelbrock performer, gave a nice midrange boost, using a stock Qjet but still noses off about 5-5500 or so, http://www.chevelles.com/forum/frown.gif Even with my 305 the Perf RPM or even a Victor JR may be the ticket. Go with a 750 double pumper!

Frank

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