Offshoreonly.com - Self tune mefi burn, am I crazy?

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- Do It Yourself, Boating on a Budget (https://www.offshoreonly.com/forums/do-yourself-boating-budget-249/)

- - Self tune mefi burn, am I crazy? (https://www.offshoreonly.com/forums/do-yourself-boating-budget/292820-self-tune-mefi-burn-am-i-crazy.html)

troper

05-16-2014 08:52 AM

I decided to get the bungs welded local. What does everyone thing of these bungs...correct ones?

http://www.ebay.com/itm/4-Stainless-...-/370380542321

4bus	05-16-2014 09:44 AM

Quote:

Originally Posted by troper (Post 4123008)

I decided to get the bungs welded local. What does everyone thing of these bungs...correct ones?

http://www.ebay.com/itm/4-Stainless-...-/370380542321

Those will work, you do not need 4 however, just do the 1,3,5,7 bank side.

When they come go to an auto parts store and ask for an 18mm copper gasket for a Honda car drain plug, use that gasket to seal the 02 bung when plug is installed.

troper

05-16-2014 09:50 AM

I figured for the price it was cheaper to get 4. Hardin wants $85. each.....

Griswald

05-16-2014 11:37 AM

Do you have a wideband, Troper? I use a Fast dual sensor unit. Would be willing to help you tune a bit as I'm not too far away, if you're interested.

troper

05-16-2014 01:01 PM

Quote:

Originally Posted by Griswald (Post 4123122)

Do you have a wideband, Troper? I use a Fast dual sensor unit. Would be willing to help you tune a bit as I'm not too far away, if you're interested.

Absolutely would like some help and some schooling. I do not have a wideband sensor unit, I was going to have to buy one, but if I can drag the boat over to you I'd rather use that money to pay you....

4bus	05-16-2014 01:12 PM

Quote:

Originally Posted by Griswald (Post 4123122)

Do you have a wideband, Troper? I use a Fast dual sensor unit. Would be willing to help you tune a bit as I'm not too far away, if you're interested.

Take him up on this offer. It is not hard once you know, but the learning curve take a lot of time....and fuel :D I would have saved about 5-10hrs having someone with experience by my side during the learning process. Bob is great, but the phone only goes so far. Great offer IMO

troper

05-16-2014 01:24 PM

I'm just PM him with my phone#. I think this is a good route to learn.

troper

05-17-2014 12:08 PM

OK did my first cal change this morning....kind of nerve racking. Bob helped me setup my rev limit to 5500rpm's. I had to unlock the Mefi 3's and then download the .bin files. Cleared the computers and reloaded with the new .bin. I will test it out this afternoon on the lake....

JRider

05-17-2014 01:05 PM

Quote:

Originally Posted by troper (Post 4121238)

4bus, what i want to do first is set the rev higher to 5600. Also I want to use a 120 thermostat. Your right I always get the hanging IAC and have to turn off and restart to bring the idle down on the port motor. I might be asking you a few more questions after I get the software Friday.

My rev limit was set at 5800 with stock cam/valvle train and I never had an issue @~9.5 boost, 120 tstat, whipple cooler. Just throwing it out there as my cat went faster even though HP may have been falling off. This also lets you keep lower prop pitch for getting out of the hole.

oregondunes

05-21-2014 01:00 PM

OK. Im right about to start this DIY myself. I have the Mefi burn software, welded bungs in both risers.

What is the most cost effective AFR setup to buy ? Do I need a dual channel and run dual o2's or just one on the 1,3,5,7 side ?

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