99+ 3400 ICM --> Worthwhile Mod?

[OldsmoBeast]

I'm thinking I might have to replace my ICM and Coils soon...and if I do, I was wondering if it would be worth the switch to a hotter 99+ ICM and coils...would I see any decent gains in HP or MPG from this mod on my stock '97 3100? and would this cause any problems?

 

Thanks

 

YK

[5speedz34]

I heard all it does is a better spark curve, and that's really it, I know Slick did it.

[Brian P]

I thought they were all the same?

[Bossman429]

I thought they were all the same?

 

I don't think GM coil packs have changed since 1988, or whenever the hell they came out on the 2.8 MPFI. Have they?

and isn't spark curve controlled by the ECM, not the ICM, I think the ICM just tells the coils when to fire as instructed by the ECM.

[cutlassdude96]

they are

[5speedz34]

Were's slick I know he can settle this.

[Brian P]

I thought it was the same and I wasn't seeing things. My dad's '02 3100 has an identical DIS to mine. The '04+ engines- 3500, series 3 3800 (I believe) have a different DIS setup, but I don't know if any advantages.