Small Block & Big Block Chevy Specific - L-98 injector fire sequence




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98_blk_Hawk
10-13-2006, 07:27 PM
I know that the L-98 is batch fire but does anyone know what cyl. injectors fire together?


BULLET99Z28
10-13-2006, 08:00 PM
I think it fires one bank at a time(right,then left) Anyone else? Its been a while since i've owned a tpi car.

98_blk_Hawk
10-14-2006, 10:58 AM
ttt..


1989GTA
10-14-2006, 03:57 PM
They all fire at the same time.

98_blk_Hawk
10-14-2006, 09:00 PM
they cant all fire at the same time? the timing from the 1st cyl to fire to the last would be too far off

slowpoke96z28
10-15-2006, 12:48 PM
it fires bank to bank. left side, right side, left side, right side, and repeat. i THINK the very last year was sequential. i think.

WheelsUp84z
10-17-2006, 02:03 PM
to my knowlege they are only bank to bank

Notime383
10-21-2006, 09:21 AM
Pretty sure it's bank to bank!

YenkoST
10-21-2006, 05:03 PM
Bank to Bank...never was sequential.

TransAminal
10-21-2006, 10:05 PM
they cant all fire at the same time? the timing from the 1st cyl to fire to the last would be too far off

And therein lies the reason why TPI sucks compared to SEFI ;)

It basically works like a Carb, the cylinders just pull in the available fuel when the intake valve opens. There's no premeasured amount of fuel for each cylinder, or timing for the injectors to open on each specific cylinder.

MattODoom
10-31-2006, 12:32 PM
And therein lies the reason why TPI sucks compared to SEFI ;)

It basically works like a Carb, the cylinders just pull in the available fuel when the intake valve opens. There's no premeasured amount of fuel for each cylinder, or timing for the injectors to open on each specific cylinder.

There really isnt much difference bank vs SEFI. SEFI only helps at idle and low RPMs, once you got WOT SEFI is pretty much batch fire.

jmd
10-31-2006, 02:13 PM
Inside the ECM, the injector drivers are wired together. It's 8 all at once batch fire. That includes the 85, 86-89, and 90-92 ECMs.

1989GTA
10-31-2006, 10:45 PM
All 8 fire at the same time as was said by the above post.

GOaT Cheese
11-01-2006, 10:40 PM
I think it fires one bank at a time(right,then left) Anyone else? Its been a while since i've owned a tpi car.
Ya, 1,3,5,7, then 2,4,6,8.