Megasquirt Progress, Main Board complete Options

[yarin]

Tonight I have completed building the main board for my MS II V.3.0 system. Thanks to those that have helped out. Once i'm all finished I will definitely post a complete "How To MegaSquirt a 914" website with pics and step by step. So far i'm still at the desk level. I've got 2.0 injection parts on the way.

I'll be using the following:

stock injectors
GM air temp sensor
stock fuel pump
summit racing manifold referenced fuel pressure regulator
stock injectors (i think 2.0s are on the way)
stock plenum / runners
stock CHT
MS Relay Board
Innovative WB02
High Current ignition driver
Stock dizzy with pertronix (hall sensor)
Stock Bosch Blue Coil
PWM Low impedence injector driver (no resistors)
Stock Cold start Valve (plan so far)
Stock throttle body with some junkyard TPS

Here is a pic of my board, took me a few hours a night every night this week. I took my time, double checked everything. So far so good!

I don't expect to have the system in the car for at least another month. I'm converting from carbs so I want to install steel fuel lines and clean some stuff up.

I'll be sure to post progress in the forums. (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

[DNHunt]

I understand the rising rate FPR but, I haven't found it necessary and I'm not going to mess with it.

I've only had a few grips. The idle flucuates with alternator load (I can't imagine running AC) so idle control would be nice. Over run is difficult to tune but was very acceptable with the greater resolution of the Hi-res code. I suspect that will also be the case with MSII. The IAT compensation is off due to heat soak of the sensor in the plenum. Both idle control and air density corrections are being worked on by other people with similar problems.

The basic B&G codes for fuel only give a nice replacement for D-jet with the benefit of tunability. Adding ignition control helps even more but, the system is not perfect and is still short of what most of us are used to with modern FI.

All in all I've been very happy with my stuff. I've had to repair a couple of solder joints, replace 1 transistor and 1 MAP sensor in 3 years and about 8000 miles. The same board has been used with 3 separate engines and in 2 forms (feul only and fuel with wasted spark distributorless ignition). I can't begin to remember how many different code versions I've used.