[Diy_efi] EFI--Manifold types

[Garrett P. Beauregard]

TomS,

We may be running different cams that allow you to make power up that high.
I'm restricted by emissions tests in my city so I couldn't use a cam that
would give me a very high operating range. If I can't spin the motor to make
power, I'm wondering if a different manifold can help me make more torque
lower in the operating range. You may be right about the port sizes on the
Pro-Flo manifold as I did not measure them and compare to the Victor Jr.

Garrett

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of CobraMan
Sent: Tuesday, August 24, 2004 9:40 PM
To: A list for Do-It-Yourself EFI
Subject: Re: [Diy_efi] EFI--Manifold types


I disagree... I have a 6" rod 400 with Edelbrock's Pro-Flo and it hits at
2000 and goes to 6400 when the cam quits. > 400 ft lbs from 2200 to 6200 at
the wheels. The ports are smaller than a victor Jr. but looks the same. TomS
----- Original Message -----
From: "Garrett P. Beauregard" <gpbeau at cox.net>
To: "A list for Do-It-Yourself EFI" <diy_efi at diy-efi.org>
Sent: Tuesday, August 24, 2004 11:03 PM
Subject: RE: [Diy_efi] EFI--Manifold types


> you've hit the issue right there. I'm running a 383 with Edelbrock's
Pro-Flo
> system which uses the Victor Jr. manifold. Pretty weak down below but the
> motor just doesn't like to spin up to where the Victor Jr. wants to
breath.
> Seems to me a big dual plane (Performer RPM and the like) would be the
> solution but have been getting conflicting information on the tuning
effects
> of manifold design with EFI. If I'm going to step up to a "real" efi
system,
> I don't want to hobble it with the wrong manifold.
>
> Thanks for the link--I'll see what they have to say.
>
> BTW--does anyone have any links to suppliers that might have screw in
> injector bungs to convert a carb manifold? This would help those of us who
> are TIG-challenged.
>
>
> Garrett
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of Mike V
> Sent: Tuesday, August 24, 2004 7:54 PM
> To: A list for Do-It-Yourself EFI
> Subject: Re: [Diy_efi] EFI--Manifold types
>
>
> At 09:24 PM 8/24/2004 -0500, you wrote:
>
> >I have an edelbrock victor jr that we converted to EFI.  It's currently
on
> >my little 305 until that blows, then I'll probably slide a 400sbc under
it.
> >It's lacking power off the line, but once I hit about 3200 RPM, it feels
> >like a rocketship is taking off.  Never really felt a powerband quite
like
> >it.  I'd imagine that with a 400sbc, the powerband would start at about
> >2300rpm or so.
>
> 305 to a 400?  You are in for a major torque fest.  8-)
> I went from a 350 and 5.13 gears turning 11.90s
> to a 400 with 4.10 gears turning 10.90 ETs.
> Same hyd Cam, heads and Vic JR intake.
> You will love it.  Just don't rev it too high,
> especially if you use the 400's short rods..
> My 400 rarely went much over 5,000 RPM.
> My burnout was always right at 4500 RPM in 2nd gear.
> It lasted two seasons, then, the guy I sold the car to
> broke a cylinder on the burnout his 2nd weekend at the track.
> You guessed it.  7500 RPM in the water - game over.
> Gawd -I loved that engine.  It was like a tractor.
> Mike V
>
>
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