Microsquirt
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Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
I've Megasquirted 3 vehicles: 22R RN Truck, 4AG20 valve in an AE92, 883 Sportster. Next Megasquirt project is Dr.Linda's Europa with a turbocharged Toyota 1NZFE motor. I have plans to do my bike, but it's "on the list." First I'll need to upgrade the electrical system to the 30-something amp version. Getting all that to work on the 19 amp Sportster system was not easy.
Thank you.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,199
Likes: 3,087
From: NW AR
Sure Matt. Ask away. And, yeah, I used a Buell throttle body on it. For fuel, I put a large metal EFI fuel filter on it to act as a surge tank. It goes: Gas tank, T, fuel filter (holds about a cup), fuel pump, injector rail, fuel pressure regulator, back to the T. Works great. Better than the factory setups which had people complaining about going lean when low on gas and in a turn.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,199
Likes: 3,087
From: NW AR
BTW, I triggered the MS off of the coil negative for the Sporty. But if you're going to boost the motor, you really need to control the timing too. I have plans, one of these days, to turbo the chopper. It's on the list. I think I have enough automotive projects now to last me the rest of my life.
I built the ECU as a MS derivative. I wanted to go Microsquirt, but it was not yet available. I had been following the development for a while and it was always "going to be released next month." I gave up on waiting and built my own. Some guys developed one specifically for their Buells by throwing away every circuit not needed to run a Buell. I went that way. Today I would go Microsquirt.
Some pics:
I built the ECU as a MS derivative. I wanted to go Microsquirt, but it was not yet available. I had been following the development for a while and it was always "going to be released next month." I gave up on waiting and built my own. Some guys developed one specifically for their Buells by throwing away every circuit not needed to run a Buell. I went that way. Today I would go Microsquirt.
Some pics:
Club Member
Joined: Aug 2008
Posts: 22,857
Likes: 17,908
From: Lafayette, Louisiana
The beauty of an Evo is simplicity and DIY friendliness, even on the side of the road or a hotel.
Introducing fuel injection into a non technical marvel is like putting ketchup on a ribeye.
CV carb, S&S, or Mikuni will all get the job done with each type having advantages and disadvantages.
A free flowing air cleaner, a decent exhaust with enough back pressure to maintain torque, a mild cam, and if you are feeling ambitious a slight bump in compression will yield a reliable bike that is fun to ride and easy to maintain. Oh, and a decent ignition module too.
That last little smidgen of horsepower and torque is what costs the most both in terms of dollars and reliability.
If my bike had came with fuel injection I either would not have bought it or immediately converted it to carburetion. The conversion is well documented on this forum.
The Delphi systems on the twin cam and M8 are good, but they don't belong on an Evo. Save the ketchup for the french fries, or Twinkies.
Side note: some people like adding a thunder jet to certain carburetors
Some people like adding a Dyna Jet kit to a cv carburetor (be sure to choose the right one) while others advocate against it.
Introducing fuel injection into a non technical marvel is like putting ketchup on a ribeye.
CV carb, S&S, or Mikuni will all get the job done with each type having advantages and disadvantages.
A free flowing air cleaner, a decent exhaust with enough back pressure to maintain torque, a mild cam, and if you are feeling ambitious a slight bump in compression will yield a reliable bike that is fun to ride and easy to maintain. Oh, and a decent ignition module too.
That last little smidgen of horsepower and torque is what costs the most both in terms of dollars and reliability.
If my bike had came with fuel injection I either would not have bought it or immediately converted it to carburetion. The conversion is well documented on this forum.
The Delphi systems on the twin cam and M8 are good, but they don't belong on an Evo. Save the ketchup for the french fries, or Twinkies.
Side note: some people like adding a thunder jet to certain carburetors
Some people like adding a Dyna Jet kit to a cv carburetor (be sure to choose the right one) while others advocate against it.
Ultimate HDF Member
Joined: Jul 2014
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From: MASS_hole
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Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
In time, my friend, I've got a relocation across the country coming up the end of June so my bike fun is on hold for a bit.
When I get settled in Tampa I'll tear down the top end for a fresh 10 over bore set of flat tops, which will knock my CR down to 9.5ish, then I'll just run it for a while so I can collect some bits. My bro-in-law has already said he'd ship me the goods from my Ultra FI to carb conversion, and there's a GT15 on eBay that looks ripe for pickin' on this project.
We're talking many months, maybe years here. I'll break this up into multiple threads but ultimately this will keep be busy for a while. Maybe I'll paint the damn thing too.
Club Member
Joined: Aug 2008
Posts: 22,857
Likes: 17,908
From: Lafayette, Louisiana