Kwanza, Nik, MR2Swift I need your help..., Same stupid questions... Options

[doGGy]

The idea:

Got ahold of MR2 4AG Blue top Engine.. Everything is included,then i mean everything i mean everything all the sensors and etc... it is from my friend car, and it was sitting tin his garage for ever, so he desided to get rid of it.. 150$ for it was too fair so im getting it....

The bottom end has some problems but i dont even care, as long as im on the route to convert it to 7AGTE...


The main Question:

Wiring is MAP based, it has all the sensors and etc etc... BUT, im going with Megasquirt and im going with 4 ignition coils (direct ignition from peugeot). Question - what else i should need to make the engine wiring work propertly with this setup?

Optional Question:

Is everything Bolt on with the 7A and 4AG head? power steering and etc? (i dont have air cond so i think this aint a big problem)...
What CR i should get using 4AGZE pistons in 7A block and using 4AG head? I knwo what ignition chamber on 4AG is more flat so less volume and as long as with 7A head i get the 10.8 CR what should i expect witht the Blue top head?

Thanks guys, i really need some info quick, cuz i need to make the desidion about this setup - is it worth all the hastle....

[Kwanza26]

The 4ag head basically bolts onto the 7A block. Just use the appropriate headgasket for the head. 4AGZE pistons in a 7A block with a 4AG head, will yeild slightly higher than stock 4AGZ compression... but it will still be fairly low... good for boost anyway. It doesn't matter what the stock harness is/was if you're gonna go with megasquirt. As far as I know... there are only one or two DLI set-ups that work with megasquirt... Ford EDIS, and I think one other. I highly doubt peugot DIS can be set up to work without some modification to Megasquirt. For the most part, "Megasquirt'n'spark" can handle everything that is required to run the engine. "Megasquirt" I believe still needs the to ECU for ignition timing.

As for 4AGE's... "bluetop" and "redtop" are very very inaccurate terms to classify the different 4AG engines. ALL of the AW MR2's had the bigport motor... regardless of the valve cover color/lettering, these are all considered "bigport"... even the 4AGZE. The AE86 all had bigports also. The ONLY cars to have had the smallport, is the AE92 corolla GTS (4AGE and 4AGZE), AE101 Levin (4AGZE), and a few others.