165 MAF and 808 MAP - differences for turbo apps?

[Bruce Plecan]

----- Original Message -----
From: Peter Gargano <peter at ntserver.techedge.com.au>
Subject: 165 MAF and 808 MAP - differences for turbo apps?


| Am I misguided in thinking I'll be better of with MAF for turbo?

Not really, but there are some considerations:
  With your relatively small engine the "normal" problem of out flowing the
MAF
    isn't a problem.
  The MAF sensor is expensive, IMHO.
  Turbo ain't as responsive as N/A so a slight delay, and over rich
acclearation
    enrichment really isn't a problem.

MAP Considerations:
  All the oem stuff is limited to 2 bar applications, and 14 PSI is just
where the fun
    starts in my book.
  MAP sensor cheaper
  Impossible to out flow the MAP sensor.
  Crisper accleration enrichment, IMHO

Things to consider:
  DIS
  Selection of 2-3 bar MAP
  Adaptation of more than 1 MAF
  Replacement parts.
  SEFI

Code options
  90 GPT 3.1 Turbo (MAP, DIS)
  91 syty (MAP, Distributor)
  87 GN (MAF, DIS, C3,SEFI)
  808 (MAP-but no bar options!!, DIS or not)
  CSH, HQ mystery ecm (MAF {so far}, DIS, SEFI, P4)
Grumpy
|
| My own, longer term, EFI project is to turbo a 1500cc flat 4 Alfa (1980
| AlfaSud Sprint), using my own plumbing, and as much stuff from a VN or
| later model 3.8L V6 Holden Commodore as possible. (Well, the flat 4 is
just
| like a Buick V6 really, 2 less pistons, 180 degree crank throws, cam
| belts, ...)
|
| The VN uses an 808 and a MAP system, the 165 is a MAF system. As far
| as I know, the ECUs are exactly the same (except the 808 doesn't have
| the 8192 baud driver/transciever chip). As I understand it, newer model
| Commodores use a MAF system, but with a different ECU (but not that
| different to the 808/165).
|
| So, should I be looking at using a MAF system for a turbo application?
| Or sticking with the MAP system? Either way, it seems the 808 will work,
| just need different code, and sensor(s).
|
| Anyone else doing anything like this?
| --
| Peter Gargano
|