[DeTomaso] Holley Sniper

Mon Jun 5 15:58:52 EDT 2023

Ken,

I have an open plenum with fairly long runners and its far better than a carb specifically calibrated for my crate engine. The aggressive cam had baf surge and stumbling under 2800rpms, but ran great above that. With the Terminator, drivability is very good down to about 1600 and sort of acceptable to about 1300 now. Incredible. May not be as good with a dual plane manfold, but it's easy to trim out some of the divider with a Dremel tool if needed.

Also, Holley Terminator isn't normal TBI injection with a big injector sitting over each throttle blade. The Holley injectors supplies fuel through an evenly perforated ring tucked into the ID of each throttle bore. You get all the power advantages of evaporational cooling under the blades like a carb plus great cold and hot starts even with a poor vacuum sign to work from. Port injection is very efficient, but takes away the horsepower advantage from the enormous drop in F/A mixture temp under the carb.

Plus it looks like a carb from 1' away.

I would never have gone away from a carb until they came out with this.

George
[Image]

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Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Ken Green via DeTomaso <detomaso at server.detomasolist.com>
Sent: Monday, June 5, 2023 12:54:39 PM
To: lgaato at yahoo.com <lgaato at yahoo.com>; 'David' <david at msmcontractors.org>; detomaso at server.detomasolist.com <detomaso at server.detomasolist.com>; Bill Moore <billmoore6480 at gmail.com>
Subject: Re: [DeTomaso] Holley Sniper

I have read that a single plane manifold has better peak power, but adjacent, consecutive firing, runners steal fuel in the plenum at low and moderate RPM.  The only solution I can think of is an EFI with separate injectors for each cylinder.  A throttle body EFI system can't do that.  It may not make a lot of difference, and if you want a nasty sounding engine maybe you want the the fuel stealing.  But if you want a very derivable car, and are going to EFI, I think it is worth using a single plane modified for injectors.
Ken

    On Monday, June 5, 2023 at 06:11:51 AM PDT, Bill Moore <billmoore6480 at gmail.com> wrote:

   Gil.....

  Or you could just get a new 750 DP......

  Cheers
  Bill Moore
  403.860.4300
  Calgary / Goodyear
    __________________________________________________________________

  From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
  lgaato--- via DeTomaso <detomaso at server.detomasolist.com>
  Sent: Monday, June 5, 2023 7:04:39 AM
  To: 'David' <david at msmcontractors.org>;
  detomaso at server.detomasolist.com <detomaso at server.detomasolist.com>
  Subject: Re: [DeTomaso] Holley Sniper

  Very good EFI system.  Use the master kit to avoid problems, includes
  fuel pump.  Follow the instructions to the letter.  The EFI is not the
  cure all, if you have engine problems, fix engine problems fist.  If
  your engine is running great, but your carb sucks, this will be will be
  the answer.
  Gil,
  4491
  -----Original Message-----
  From: DeTomaso <detomaso-bounces at server.detomasolist.com> On Behalf Of
  David
  Sent: Friday, June 2, 2023 6:46 PM
  To: detomaso at server.detomasolist.com
  Subject: [DeTomaso] Holley Sniper
  I'm about ready to pull the trigger and go EFI. Holley Sniper seems to
  be reasonable and reliable. Anyone here done that?  If so, what did you
  do for a fuel pump and where did you mount it?
  Thanks,
  David Finley
  3659
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-------------- next part --------------
   Ken,

   I have an open plenum with fairly long runners and its far better than
   a carb specifically calibrated for my crate engine. The aggressive cam
   had baf surge and stumbling under 2800rpms, but ran great above that.
   With the Terminator, drivability is very good down to about 1600 and
   sort of acceptable to about 1300 now. Incredible. May not be as good
   with a dual plane manfold, but it's easy to trim out some of the
   divider with a Dremel tool if needed.

   Also, Holley Terminator isn't normal TBI injection with a big injector
   sitting over each throttle blade. The Holley injectors supplies fuel
   through an evenly perforated ring tucked into the ID of each throttle
   bore. You get all the power advantages of evaporational cooling under
   the blades like a carb plus great cold and hot starts even with a poor
   vacuum sign to work from. Port injection is very efficient, but takes
   away the horsepower advantage from the enormous drop in F/A mixture
   temp under the carb.

   Plus it looks like a carb from 1' away.

   I would never have gone away from a carb until they came out with this.

   George

   Image

   Sent from my Verizon, Samsung Galaxy smartphone
   Get [1]Outlook for Android
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Ken Green via DeTomaso <detomaso at server.detomasolist.com>
   Sent: Monday, June 5, 2023 12:54:39 PM
   To: lgaato at yahoo.com <lgaato at yahoo.com>; 'David'
   <david at msmcontractors.org>; detomaso at server.detomasolist.com
   <detomaso at server.detomasolist.com>; Bill Moore
   <billmoore6480 at gmail.com>
   Subject: Re: [DeTomaso] Holley Sniper

   I have read that a single plane manifold has better peak power, but
   adjacent, consecutive firing, runners steal fuel in the plenum at low
   and moderate RPM.  The only solution I can think of is an EFI with
   separate injectors for each cylinder.  A throttle body EFI system can't
   do that.  It may not make a lot of difference, and if you want a nasty
   sounding engine maybe you want the the fuel stealing.  But if you want
   a very derivable car, and are going to EFI, I think it is worth using a
   single plane modified for injectors.
   Ken
       On Monday, June 5, 2023 at 06:11:51 AM PDT, Bill Moore
   <billmoore6480 at gmail.com> wrote:

      Gil.....
     Or you could just get a new 750 DP......
     Cheers
     Bill Moore
     403.860.4300
     Calgary / Goodyear
       __________________________________________________________________
     From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf
   of
     lgaato--- via DeTomaso <detomaso at server.detomasolist.com>
     Sent: Monday, June 5, 2023 7:04:39 AM
     To: 'David' <david at msmcontractors.org>;
     detomaso at server.detomasolist.com <detomaso at server.detomasolist.com>
     Subject: Re: [DeTomaso] Holley Sniper
     Very good EFI system.  Use the master kit to avoid problems, includes
     fuel pump.  Follow the instructions to the letter.  The EFI is not
   the
     cure all, if you have engine problems, fix engine problems fist.  If
     your engine is running great, but your carb sucks, this will be will
   be
     the answer.
     Gil,
     4491
     -----Original Message-----
     From: DeTomaso <detomaso-bounces at server.detomasolist.com> On Behalf
   Of
     David
     Sent: Friday, June 2, 2023 6:46 PM
     To: detomaso at server.detomasolist.com
     Subject: [DeTomaso] Holley Sniper
     I'm about ready to pull the trigger and go EFI. Holley Sniper seems
   to
     be reasonable and reliable. Anyone here done that?  If so, what did
   you
     do for a fuel pump and where did you mount it?
     Thanks,
     David Finley
     3659
     _______________________________________________
     Detomaso Email List is not managed by POCA Posted emails must not
     exceed 1.5 Megabytes DeTomaso mailing list
     DeTomaso at server.detomasolist.com
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   any
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   archive
     or approve the archiving of list messages.
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