I don't think Megasquirt supports sequential fuel injection, like the others do. Although last I heard they were working on it. Anyone know for sure?

 

megasquirt will do sequential with the addition of router board, but it isnt available yet.

i think my problem is that i need a crank angle sensor and a cam angle sensor to do sequential injection.
i can use the optispark sensor for the crank angle, but getting the cam angle reference is what i have to figure out.

 

What intake manifold are you running?

 

stock IM,
why?

 

LT1's don't have sleeves!

I had an overboost incident one time that blew both head gaskets, though. . .

Mike

 

It's not so bad, really. I set mine up to run 12.5/1 in the dead cold of the winter. In the summer, it richens up to about 11/1. To me, 10.5 - 12.5 is an acceptable range. My ignition timing retard is controlled by a HI-6TR. I am using a '95 OBD1 computer and it is limited to 100 kPa unless you do a 2 or 3 bar SD tune. I plan on trying this one rainy day.

It's hard to tell exactly when it spools up since the converter flashes higher as it spools. My converter is a 10.5" Vigilante that flashes to about 3000 on motor, then 4500 on boost.

Mike

 

The reason I asked about the intake manifold is because if you're running a Gen 1 SBC manifold, there's a part that will drop in the distributor hole and provide the cam signal, and then you would run a crank trigger in addition to that.

Otherwise, an opti can be used as a cam signal source with an LS1 BS3, but it needs modifications to do so.

 

im trying to avoid swapping to a complete ls1 ignition and therefore having to use the $500 more expensive BS3 box

i thought i read something about running a distributor (like a sbc) and using that for cam angle, and use the opti for crank angle?

i saw lt1intake.com, but there isnt much info on that site.
anyone wanna give me something to search?
i can run this sorta intake if it helps make some room in the back for a dizzy:

 

I plan on running mine batch fire. As long as the fuel is there when it fires I don't care how it got there.

 

I agree. Controlling fuel and timing vs only RPM is not an accurate way of tuning a turbo car. Even if you did get it 'tuned' at a certain boost level, you couldn't change the boost without further changing the program. (and changing boost on the fly is one of the great things about a turbo car in my opinion)

 

i agree to an extend.
i planned to run e85 and make 700-800ish, which means ill need some pretty big injectors. i will also need a pretty monster fuel system.
if i run bank to bank them every time the injectors i have to worry about pressure drop.
also this will be a streetcar (or streetable atleast) so drivability is a big concern.

besides, my 95 TA is sequential, i dont want to go backwards in technology


my question is, since the stock pcm fires the injectors sequentially, what does it use to reference the cam and or crank?

 

The stock PCM gets both crank and cam signals from the opti. And fwiw if you use BS3 with no cam sensor it won't be running in batch fire, it will basically be in random sequential (as it doesn't know when it's firing the #1 cylinder).

 

not trying to nit-pick on words, but random sequential isnt really sequential is it?
if the injector isnt firing on the intake stroke (and only on the intake stroke) then its not sequential (or atleast the sequential i know )

anyone have any other information on this?
or some sort of search string? im not asking for free info, but im running out of things to search for

 

dynoed 783 rwhp today, stock opti..
11.0 A/F and a wery loose converter, speed at rearwheels was equal to 6200rpm when engine hit rev limiter at 7000rpm...
Didnt try the N2O since the dyno had trouble to handle the power...

 

^^^
wow,
im looking to around there.
are you using a stock pcm?
if not, how are you referencing cam and crank angle?