Fuel Enrichment; TT vs Autotech (or coolant vs DPR)

[amalventano1 at tds.net (Allyn)]

along the lines of what peter said, i feel that its safer to have the ecu 
directly control the dpr (tt). since the dpr is a current regulated circuit, 
if a device tries to 'intercept' that circuit (autotech), the ecu could 
eventually fry itself trying to produce a dpr current different from what 
the 'upgrade' is producing at the time.

both modules achieve the same result, i just feel that the tt module does it 
a bit safer.

hth
Al

----- Original Message ----- 
From: "Peter" <peter@thescirocco.com>
To: <scirocco-l@scirocco.org>
Sent: Saturday, October 23, 2004 12:48 PM
Subject: RE: Fuel Enrichment; TT vs Autotech (or coolant vs DPR)


> -----Original Message-----
> From: scirocco-l-bounces@scirocco.org
> [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of Rick Kellner
> Sent: Saturday, October 23, 2004 10:01 AM
> To: scirocco-l@scirocco.org
> Subject: Fuel Enrichment; TT vs Autotech (or coolant vs DPR)
>
> Does anyone have an opinion or experience as to the best approach for fuel
> enrichment for the CIS-E?
> There are two approaches that I know of; first the TT version which 
> enriches
> mixture via coolant temp sensor circuit.  The second version is the 
> Autotech
> which enriches mixture via DPR current.
> Thanks, Rick.
>
>
>
> The TT fuel enrichment is simple and it works great, you can really feel 
> it
> from 4000 and up. The best part is that if this simple 1100 ohm/DPDT relay
> circuit ever fails, it has no affect on how the car runs. It's as though 
> it
> wasn't there...
>
> Peter
>
>
>
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