I have read all the previous posts and am still wondering what the BLM does? I know its the Block Learn thing, but how does that help me when watching thru a scanner.

Also, I have bumped up my MAP and TPS Accelpump in uSec array. Not by much tho. Mostly I changed things like idle speed and IAC / temp. ***Generally***, what will the effects of the Accelpump changes be, if any without modifying the spark advance table?

There is a value for "Max RPM spark slope". Is this where the computer backs off timing at a certain RPM, and then decays and couple degrees per RPM? If I have an MSD 6AL, which should be good for like 10000 rpm, should I set the decay rate down? I'll post the signature so if you need to know, there's all my mods.

TIA

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'92 Astro 350 TBI Edelbrock intake, MSD 6AL, 3.42's, 2.5" exhaust, Flowmaster 40 2 chamber, B&M 2nd stage shift kit, 255 60 R15 tires on AR-727's

 

Hmm, I guess no one here has ever heard of this, funny, I thought this was a DIY PROM help board.

my mistake

 

The BLM question is very basic. There are many posts that already answer this question. Not sure on the spark question since I have never worked with a TBI.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

I'm not much help, but watch your BLM and you want to be as close to 128 as possible. I just got my scanner running and my BLM seems to be running below 128 (running rich I think) with the stock programming.

Your question about the accelpump stuff is interesting because I have the same questions.