[Gmecm] ECM Choice: Sequential V6, hydraulic transmission, with lockup convertor

[Jay Vessels]

Hi there!

Production 3.1V6 Cavalier had either the THM125 or the Getrag 282 
5-speed manual.

Comparing fuel economy numbers across cars and drivers is almost 
impossible, but considering the mileage I got from my '94 Z24 
convertible ($A1/5-speed) and what Dad gets from his '93 Z24 convertible 
($A1/auto), I will second the notion that decent fuel economy (30 MPG 
highway) can be had from multiport systems.  I'd recommend tuning with a 
wideband O2 sensor, regardless of system, to maximize the benefit of 
whatever system you choose.

As an aside, has anyone used LT1 ('8051) code for a non-V8?  Is there a 
V6 or 4-cylinder version that is as flexible?

Jay Vessels
1982 Chevrolet S-10 Sport, 2.8V6 TBI
1984 Chevrolet S-10 Blazer Sport, 2.8V6 (TBI pending)

William Lucke wrote:
> I assume that your Cavalier has a 4 speed transmission? Do you have 
> functioning EGR?
> I'm stuck with a 3 speed AWD that currently gets 22 hwy/19 city. Gearing 
> changes might push me to 24-25. If sequential is worth 0.5 mpg, I want it.
> I also think the 3100 is a fundamentally better/more efficient engine 
> than the 3.1. With the roller cam and better heads/intake, it's 
> certainly more responsive to boost.
> 
> 
> Will
> 
> 
> From: "Brendan Patten" <bpatten at centurytel.net>
> Subject: RE: [Gmecm] ECM Choice: Sequential V6,    hydraulic transmission
>     with lockup convertor
> 
> I'm getting over 30mph highway with my 3.1L $A1 Cavalier.  Highway mode
> fuel AFR 16.5:1 and a bunch of timing added. (still no knock)
> 
> I'm trying to convert to $8D mask on my 3.1L right now for more BLM
> cells. But no sequential.
> 
> There was also the Turbo Grand Pri in 1989 with a 3.1L, $8F mask.  Not
> sure of how many blm cells there
> 
> $58 mask could be adopted to a DIS engine, you'll get 16 cells and
> boost, still no sequential.
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