GT-40 Performance Upgrades Help

lewy2001 wrote: Maybe just send it all over to Keno he loves R & D

Send it to Joe, we seem to do all our R&D on his boat

Right now I'm running the computer I put together with the add on chip and the 300 tune. Most of the reason I opted to try this was the possibility of evening out the idle. I first ran the new engine on the 300, then for comparison switched back to its stock 290 computer. Honestly, I really couldn't tell any difference between the two and it really did nothing for the idle. I have switched back to the modified computer with the 300 tune but certainly not because of any perceptible performance gains. More because, as Rusty says it's supposed to be a better, upgraded tune which I took to mean the air/ fuel mix, timing and the like was more refined.    

Performance increase? No. Better fuel economy? Not that I can tell. Smoother, more consistent idle? Hard to say for me since I had what seems to be a host of problems causing idle issues. They appear to be solved now but was it at least partially due to the tune?   Anybody's guess.

Does the 300m give the engine a little more umph?

Thank you! I appreciate the picture!

KENO wrote: DHMcFadin wrote: Does any know what years pcm used the e290 and 300m calibrations? I have a 99 GT40 with the original ECM. If you read the sticker on your ECM you'll know what you have for sure Here's a picture of a sticker

DHMcFadin wrote: Does any know what years pcm used the e290 and 300m calibrations? I have a 99 GT40 with the original ECM.

If you read the sticker on your ECM you'll know what you have for sure

Here's a picture of a sticker

I have a engine with 1998 date codes on some components - it has the 300 tune.

Rlbarrasjr wrote: gun-driver wrote: Did this upgrade just allow you to get a dead ECU running or are you putting more ponies to the water with the tune? personally i plan to put a stroker rotating assembly in mine and i'll need to tune for it.

Personally I would go roller cam, roller rockers and a nice set of AFR heads then see how it tunes, that combo should put you close to the 400 ponies mark.

gun-driver wrote: Did this upgrade just allow you to get a dead ECU running or are you putting more ponies to the water with the tune?

both! sort of. the dead ecu replacement with the chips that places are selling are taking this same family of hardware and loading a stock tune/calibration on it to get up and running.

this software addition will let you manipulate/tune that stock calibration file for any performance upgrades you do. it also does datalogging. personally i plan to put a stroker rotating assembly in mine and i'll need to tune for it.

yes.. the MCSR1 strategy will open both calibrations, but i wouldnt use e290 at all. the 300m seems to be a more mature calibration.

Biggest thing to notice it that they drop some spark and richen up the upper rpm range. they made some adjustments to lower/smooth idle too.

Rusty

Using that MCSR1 strategy you can view BOTH the 300M and E290 tune? Or is this MCSR1 just for the 300M? Out of curiosity I’d sure like to compare and contrast the two tunes and see what changes PCM made.

Any updates to the GT40 Performance Upgrade?

gun-driver wrote: If you can break the code and come up with a not super expensive way to add power to the GT-40 you will be a hero to a lot of people on here. I’ll be watching this one

It is done!!! Core Tuning compiled a definition file for the 300m marine gt-40 using their Binary Editor Software. I was emailing Clint and Ben for months to get it ready. This can also be used on earlier e290 ecus. I just got it loaded. Going to do some test using the QuarterHorse Chip in the coming weeks. The definition is MCSR1. There are way more parameters defined than what i expected. see screen shot. It is supposed to be able to datalog too.

Are all GT40 heads the same?
Can I use a Mustang/explorer set on my 86 Martinique?

I helped Thomas awhile back with testing the GT40 replacement computer options. I will be doing power adders at some point on my boat. I have done the research on the MEgaSquirt, but I'm also exchanging emails and working with the guys that support Ford EEC-IV Binary Editor and TunerPRO to get a definition file made to tune the factory PCM GT40 computer. I'll post any info I receive.

Lewy2001, sent you a pm... any info you have on your megasquirt setup would be appreciated. I'm considering the same conversation and maybe setting up closed loop scheme. rbarras@gmail.com