[DeTomaso] efi horse power gain

Mon Aug 10 11:38:48 EDT 2009

As Kirby says the long rocker fuel tanks on the GT40 create a lot of fuel slosh and one thing you don't want is a high pressure fuel pump to run dry at any time.

The swirl tank allows me to retain the exisitng low pressure system and fuel pumps. They will feed into the swirl tank which is the supply for the EFI pump and high pressure return. The overflow from this tank is then directed back to its respective fuel supply tank.

For the Pantera an in tank returnless system is probably the way to go. I will likely use a fuel cell in the Pantera, although I have no idea what race sanctioning bodies regulations are in regard to in cell fuel pumps. 

For more information on EFI plumbing and swirl tanks etc. Kinsler has a good section in their catalog which can be dowloaded from their webiste. I tend to believe this and TWM more for the 8 stack IR throttle body injections as Aeromotive don't have products in this area.

Julian

CC: julian_kift at hotmail.com; wkooiman at earthlink.net; detomaso at realbig.com
From: kirby.schrader at gmail.com
To: kenn_green at yahoo.com
Subject: Re: [DeTomaso] efi horse power gain
Date: Sun, 9 Aug 2009 07:27:54 -0500

Not a trivial task to mount a pump in the tank on a GT40.

You would effectively have to build a new tank (or modify the existing one internally) to create a baffled area for the pump inside the tank. Mike Trusty and I have spoke about this numerous times.

On 9 Aug 2009, at 2:36 AM, Ken Green wrote:

I understand the logic for the separate surge tank, but Aeromotive is one of the big guns in high power EFI fuel systems, and they don't seem to talk about the separate tank.  They do make a big deal about mounting the high pressure EFI pump in the fuel tank and one of their tech guys told me that the pump works better and longer submerged in the tank.  

Ken

--- On Sat, 8/8/09, Kirby Schrader <kirby.schrader at gmail.com> wrote:

From: Kirby Schrader <kirby.schrader at gmail.com>
Subject: Re: [DeTomaso] efi horse power gain
To: "Julian Kift" <julian_kift at hotmail.com>
Cc: wkooiman at earthlink.net, "De Tomaso List" <detomaso at realbig.com>
Date: Saturday, August 8, 2009, 3:33 PM

Ah, yes.... another person doing IR EFI on a GT40. Let us know how you  
get on!
Jack Houpe, Mike Trusty and myself all have a TWM setup with a TEC3r  
(Jack uses a TEC2) on our GT40's.

Each one of us attacked the twin tank fuel feed setup differently. I  
need to re-plumb my fuel system. I have a 'better idea' than what I am  
using now.

On 8 Aug 2009, at 11:23 AM, Julian Kift wrote:

> I am in the initial stages of an EFI retrofit on the GT40 with a TWM  
> IR system. Even after getting a good deal on the TWM throttle bodies  
> and the ECU it has cost far more than I care to tell in $$ and time  
> (it's all the little stuff, plus the complexity of twin tanks in  
> that application requiring a swirl pot etc.). I constantly ask  
> myself why I didn't just buy a Weber 48IDF set up and may even still  
> do that.
>
> For the Pantera I have a Kinsler mechanical unit that I will convert  
> to EFI and the ECU will be the DTAFAST (out of the UK), it is as  
> capable as a MOTEC at about half the cost.
>
> http://www.dtafast.co.uk/
>
> Julian
> > Date: Sat, 8 Aug 2009 10:54:49 -0400
> > From: boyd411 at gmail.com
> > To: wkooiman at earthlink.net
> > CC: kirby.schrader at gmail.com; detomaso at realbig.com
> > Subject: Re: [DeTomaso] efi horse power gain
> >
> > The EFI set up I am looking at and considering is basicaly the same
> > one Mad dawg has. It is a twm Induction stack (looks like webers)  
> The
> > ECU I am considering is the FAST ( I spoke to dawg and this is a  
> more
> > upto date ECU then he has) Another key component are the  
> injectors.The
> > two things I don't have are Mike Trusty and the CASH! I'm working on
> > the cash but I don't know what to do about Mike.
> > Boyd
> >
> > On Sat, Aug 8, 2009 at 9:57 AM, Will  
> Kooiman<wkooiman at earthlink.net> wrote:
> > > There's a very dramatic initial negative increase.  In most  
> cases, the
> > > initial increase is the carbureted HP * -1.
> > >
> > > After a year or two of fiddling around, EFI catches up.
> > >
> > > Then you get smart and buy Mike Trusty a plane ticket.  You  
> treat him right,
> > > feed him, and brag about how your tires hook really well.  Then  
> M.T. fiddles
> > > for 15 minutes, and finally EFI surpasses your carbureted HP.
> > >
> > > But then you need better tires.
> > >
> > > -----Original Message-----
> > > From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com 
> ] On
> > > Behalf Of Charles Engles
> > > Sent: Saturday, August 08, 2009 8:46 AM
> > > To: boyd casey
> > > Cc: Kirby Schrader; detomaso at realbig.com
> > > Subject: Re: [DeTomaso] efi horse power gain
> > >
> > > Dear Boyd,
> > >
> > >
> > >                  Perhaps Kirby Schrader would comment on this.    
> He had one
> > >
> > > of the Haltech EFI systems installed on his already healthy  
> engine back in
> > > the mid nineties and he has first hand experience about the  
> before and after
> > >
> > > performance.  He was very happy with the change.
> > >
> > >                             Warmest regards,  Chuck Engles
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "boyd casey" <boyd411 at gmail.com>
> > > To: "De Tomaso List" <detomaso at realbig.com>
> > > Sent: Friday, August 07, 2009 10:50 PM
> > > Subject: [DeTomaso] efi horse power gain
> > >
> > >
> > >> Can anyone tell me what kind of horsepower increase one could  
> expect
> > >> from the addition of a quality professionally setup sequential  
> efi to
> > >> a Cleveland  engine?
> > >>
> > >> Boyd
> > >> _______________________________________________
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