1998 LS1 MAP tuning

[elitetune]

Hey guys new here do not know if i am in the right spot haha. anyways i got a 1998 Camaro Z28 that i did a sheet metal intake and a 92mm TB and i had to change from the factory 1 bar map to a 3bar map (GM #12592525) i wired a new connector. never messed with VE tables and or map swaps just need help!!! Also with stock tune it bogs really bad on take off but afterwards revs great.

[ChipsByAl]

Did you change the map sensor because you are planning on using boost? If so it would be best to convert to the later model PCM.
Al

[elitetune]

I plan to run 200 shot nitrous in it. No boost but the sheet metal intake I got only allowed a LSA map bolt up. Is the 1998 PCM not workable for this? Also what pcm do I upgrade to if I have to go that route?

[ChipsByAl]

I'm not sure of the design of the intake manifold, but I would strongly recommend against running a 3-bar sensor on a normally aspirated engine. You will lose 2/3 of the VE table resolution. You would not need to bolt in the MAP sensor if you are not running boost.

The later model PCM's would include the 1999-2002 512 meg PCM. 16238212, 9354896, 12200411 are all 512 meg PCM's. https://www.lsenginediy.com/comparing-gen-iii-controllers/ has some good descriptions of various GM PCM/ECM's. If you are interested in updating your vehicle to the 1999 up PCM you can email me or PM me.
Al

[elitetune]

ok so just install the cover and run maf and cancel out the map? this the intake BTWhttps://www.topstreetperformance.com/products/tsp-velocity/intake-manifolds/ls1-fabricated-intake-manifold-3069.html

[ChipsByAl]

Keep the MAF if you can and put the stock MAP sensor with a good grommet in the hole where the MAP sensor goes. That will get you in a better place to start tuning. There are tutorials here on the forum for AutoVE to get you going.
Al

[joecar]

Good advice, thanks Chuck :cool: