[DeTomaso] intake maifold for throttle body injection

[Richard Greenblum]

As I mentioned before to JF and Gudmund, some of the MSD boxes have a "tach sweep" function and for reasons way over my head, the Sniper reads the high RPM in the sweep as the initial idle setting, so it pumps enough fuel for the 7,000 to 9,000 rpm at engine start.  That's what we think happened with mine on the dyno.  Fortunately, my engine builder thought the better of starting with the Sniper and broke the engine in with his dyno carb and also captured a base line for comparison.  Unfortunately, he couldn't ever get the Sniper to work properly and we didn't find out about the tach sweep issue until the motor was in my garage.

I'm convinced, but won't know for sure until I get the motor back in the car, that correcting for the tach sweep and having milled a half inch off of the plenum divider, the Sniper will run just fine.

Richard
Austin, TX

-----Original Message-----
From: DeTomaso <detomaso-bounces at server.detomasolist.com> On Behalf Of Will Kooiman
Sent: Thursday, October 14, 2021 3:32 PM
To: Ken Green <kenn_green at yahoo.com>; detomaso at detomasolist.com; byrdjf at embarqmail.com
Subject: Re: [DeTomaso] intake maifold for throttle body injection

I actually think I saw a dyno test (Carb vs. EFI) where they had problems using throttle body fuel injection on a dual plane.  They switched to a carburetor, and the problem went away.  I think I'm remembering this correctly.  Brain cells are worn out.

So, what if the injectors aren't spraying evenly?  A common plenum would even it out.

I know - the correct fix is to fix the injectors.  All I'm saying is maybe this engine builder had a plugged injector or something, and then he switched to a single plane and the problem went away.



On 10/14/21, 12:39 PM, "DeTomaso on behalf of Ken Green via DeTomaso" <detomaso-bounces at server.detomasolist.com on behalf of detomaso at server.detomasolist.com> wrote:

       I have a Weiand single plane 4V manifold with injector pockets added
       and it fits under the stock engine cover:
       Inline image
       I have an MSD throttle body and it may not be as tall as a throttle
       body including injectors, I can measure it tonight if that helps.
       Probably not an optimal combination, but I wanted it to fit.
       Here is a new 351C 4V Blue Thunder intake on ebay:
       [1]Blue Thunder Ford 351 Cleveland 4 Barrel Pantera Intake Manifold |
       eBay
       $639.00

                                     [ebay.png]

       Blue Thunder Ford 351 Cleveland 4 Barrel Pantera Intake Manifold | eBay

         (1) Blue Thunder 351 Cleveland Pantera Intake Manifold. More things
                   that set this manifold apart from others: AU...

       Ken

       On Thursday, October 14, 2021, 08:10:26 AM PDT, JFByrd via DeTomaso
       <detomaso at server.detomasolist.com> wrote:
       I just got an email from builder stating the Ford AL dual plane intake
       is not suited for throttle body
       Is this true?
       If so, wouldn't that rule out Blue Thunder (if I could find one)?
       Any experience with single plane that would fit under stock engine
       screen
       _______________________________________________
       Detomaso Email List is not managed by POCA
       Posted emails must not exceed 1.5 Megabytes
       DeTomaso mailing list
       [2]DeTomaso at server.detomasolist.com
       [3]http://server.detomasolist.com/mailman/listinfo/detomaso
       To manage your subscription (change email address, unsubscribe, etc.)
       use the links above.
       Members who post to this list grant license to the list to forward any
       message posted here to all past, current, or future members of the
       list. They also grant the list owner permission to maintain an archive
       or approve the archiving of list messages.

    References

       Visible links
       1. https://www.ebay.com/itm/284455077268
       2. mailto:DeTomaso at server.detomasolist.com
       3. http://server.detomasolist.com/mailman/listinfo/detomaso

       Hidden links:
       5. https://www.ebay.com/itm/284455077268
    _______________________________________________


    Detomaso Email List is not managed by POCA
    Posted emails must not exceed 1.5 Megabytes
    DeTomaso mailing list
    DeTomaso at server.detomasolist.com
    http://server.detomasolist.com/mailman/listinfo/detomaso

    To manage your subscription (change email address, unsubscribe, etc.) use the links above.

    Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages.


_______________________________________________


Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list DeTomaso at server.detomasolist.com http://server.detomasolist.com/mailman/listinfo/detomaso

To manage your subscription (change email address, unsubscribe, etc.) use the links above.

Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages.