[Diy_efi] Projects

[David Allen]

Your engine setup looks very good. Nice 4-BBL throttle body setup.
I've found out, as you, that part throttle is the worst part of it. Multiple 
ECU's and different engines and the part-throttle is always the pain to 
tune!

As for the part-throttle drivability, what is it doing? Do you have any 
videos of the drivability problem?

Sincerely,
David





----- Original Message ----- 
From: "Clair Davis" <clair.davis at charter.net>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, October 17, 2012 10:55 PM
Subject: Re: [Diy_efi] Projects


> Probably a good refresher for me to think about this again.  I've talked a
> bit about my project with some of you in the past, most likely on the 
> GM-ECM
> list.
>
> My project is installing a GM TPI-based MPI on a 1969 Plymouth Valiant
> sedan.  The car was my daily driver for years, and I've been setting the 
> car
> up as a fun cruiser and SCCA auto-cross / road racer as it becomes more of 
> a
> toy.  I started the swap to EFI after fuel and oil control issues became 
> the
> limiting handling factors.
>
> The system is based on a 7730, and includes a number of GM and
> Chrysler-based parts.  I'm tuning with TunerProRT and Moates' APU1, and I
> have some version of AUJP in the car now.  I have been able to drive the 
> car
> some, but most of my tuning progress was made just before and shortly 
> after
> my 1st son was born - 7 years ago.  I really need to get this car back on
> the road and enjoy driving it again, and the tuning is all that is
> preventing that from happening right now.   Idle is nice and WOT is
> surprising, but that bit in the middle is trouble...
>
> I'm hoping that over the next few months I'll be able to sort out the part
> throttle cruise problems enough to be able to drive it to a local dyno 
> shop
> and do some more detailed tuning off the highways and side streets.  I'm
> also seriously considering a move to a different control system if it will
> significantly ease my tuning chores, but I've got quite a bit invested in
> this OBD-I setup, so the benefit/cost has to be there.
>
> Here's some eye-candy for sticking with me so far...
>
> The car as she was right before the EFI project started, all the 
> suspension
> goodies in place:
> http://www.moparfins.com/clairdavis/webimages/69sedan/In_The_Park2-PS-Clippe
> d.jpg
>
> And here's the engine after getting all the hard parts bolted down for
> keeps:
> http://www.moparfins.com/clairdavis/webimages/69sedan/upgrades/efi/TB_Serp_O
> n-small.jpg
>
>
> Thanks,
>
> Clair
> DFWTX
>
>
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