Dean_GTA

Hi, I have a 1988 350 TPI. A good friend of mine has a good buddy that installs and tunes Megasquirt stand alone systems in modified EFI vehicles. My friend is trying to convince me into getting Megasquirt for my Trans Am. I have a 350 TPI motor with Vortec heads, and LT4 Hot Cam, with 1.6 rollers. SLP headers, bigger runners, 24lb injectors, and a bigger Trottle body. Would it be worth doing this upgrade?

WASyL

yes, Megasquirt II is fantastic, i have just installed one in my 383 HSR and found addtional ponnies that i didn't managed to get with just Prom Burning, it is very easy to use and You can finetune for free (you just need laptop) everytime You change any part in engine

best regards

Dean_GTA

Glad you're happy with it. I'm probably going to do it. Who did it for you, and what do they charge? Is there any issues with the converter lock up? Do they make a board, or do you have to use a stock ECM as a donor? Are you using a 5 wire O2?

Drumer919

MS uses its own board and housing. There are so many outputs I'm sure it can take care of the TCC.

thunder85

iTrader: (1)

if you wait a bit, i'm beta testing the new adapter board for the guy who made the tbi adapter board (diyautotune.com). its a direct tpi harness to megasquirtII connection. its pretty sweet and no custom wiring is required. ms2 would definitely kick *** for your application... especially if you score yourself a wideband o2 sensor.

1bdbrd

iTrader: (1)

Any time frame on when that board will become available?

thunder85

iTrader: (1)

i will ask him... i assume after we get my car running well (hopefully this weekend) it will be considered tested and anytime after that but i can't speak for him.

1bdbrd

iTrader: (1)

PLEASE let me know as I will be ordering my MS within the next couple of weeks.

Vortex91

Does he have an adapter for TBI?

Can MS handle the vapor canister purge?

How would one go about controlling the converter lock up?

Thanks

D.

thunder85

iTrader: (1)

yes, on diyautotune he has the tbi adapter board for sale

the ms does not do emissions. if its a concern, you will need to install it in a piggyback manner to keep your stock computer running emissions equipment.

the board i have has a circuit setup for controlling the tcc lockup.. due to it not utilizing the vss it requires the 4th gear signal from the transmission and some other paramaters. havn't set it up yet on mine. uses pin 30 on the ms to control the primary fan relay, has relay's on the board to control the fuel pump and ignition. has knock circuit built in.. its freakin sweet

nuggie

any word on a direct adapter or walk through for the connecting of mega squirt 2.0 to a post 89 TPI? I noticed on their web site they have the direct adapter now for pre 89, but that doesn;t help me

Six_Shooter

iTrader: (2)

No adapters for going from the SD (1227730) style ECM to Megasquirt. Most people recommend re-pinning the later harness to use the earlier style adapter.

project89

iTrader: (1)

i think u can move some stuff around on the adapter board to make it work with 90-91-92 harnesses , instead of repining the harness

Six_Shooter

iTrader: (2)

Uhhh, noooo...

The SD harness has 3 connectors, where as the earlier systems has only 2, a re-pin is required to use that adapter.

project89

iTrader: (1)

let me look threw some of my stuff im not eactly sure what the person did , but they may have changed the connector and moved stuff around on the adapter to make it work .

Six_Shooter

iTrader: (2)

Yeah, which would be "re-pinning".

Ronny

iTrader: (1)

I thought S10wildside was doing something "special" to make it possible to not repin. A search may show something. Maybe pm him.

nuggie

Would it be possible to just buy and older engine harness and get the adapter so both en ds would just plug in?

Ronny

iTrader: (1)

That would entail soldering and heat shrinking. More work. Repin is moving pins with a paperclip to release pin from female plug in

Ronny

iTrader: (1)

Note recent post on above thread

anesthes

iTrader: (12)

The 3 plug connectors don't appear to be available, only the delphi 56 connector, which is why you don't see any 3 plug megasquirts.

-- Joe