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Tested some now. And the only setup that would pop and bang on overrun was -10deg and ~17afr.

Some here say that you should have a big ignition advance, an another says that you would need the spark cutted or retarted big time. Which one do I want? And what is heavy advance, ~40 degrees? Much retard, what is that, ~0 degree, -20 degrees? And what is very rich mixture on overrun? Is 11.0 -> 1...

Have now tried some more. The same story with more boost. Up on 1bar (14-15psi) now. Low ignition 5-15 degree you can do whatever you want with the fuel, more or less, nothing helps. When you put the pedal down the engine will not pull right, lots of misfiring, bangs and small shakes. But when I rai...

The engine is now running. 3l, 9.5:1 compression, QV cams. Already I am seeing around 11.6psi boost. Started with an basic map which gave around 10-15degree ignition at 0.8bar. Then the engine would not work at all, feels like you are pressing the brakepedal. Changed the ignition to 20degrees, that ...

Ok, thanks! But for the matter of low vs standard compression? The engine I have been using now have all standard internals, and I want to keep them a little longer.. Should I go for low compression & high boost or standard compression 9,5:1 if using 3l and low boost? Is it like it just have to ...

The 2.7 is an machined 2l tb block modified to fit 3l liners. I am still using the 2l tb crank. So that makes it 2.7l. The compression in that engine will therefor be low. So I need to boost alot to make anything happen. Though I have to say it is not as "lazy" as I would expect from such ...

Hi all! I am currently rebuilding my 2.7l. (Worn out exhaust tappet) I am thinking about to put in an 2.5l crank, will give a little higher cr (now I use the 2l crank), or to do with an standard 3l engine. 9.5:1 cr. But how much boost can I use on that engine? Will probably go with e85 fuel, have it...

Hi all! Interesting subject. I have an 2.7l V6 turbo engine (CR around 7.0-7.5:1) that I will overhaul the next weeks to come. The engine were working fine, just that I want to see how it is after 20k km driven and boosting 1.5bar on original internals, even original headgasket. When I now rebuild t...

Below is my imaginary spark table - and the current table..
Comments on this?
-Sorry, but my current table is "upside-down"
-The current table is mainly done by an generator where you put in air inlet temp, bore, cr, fuel quality and number of valves.

I suppose that this is an starting point from 100kpa and up to 180kpa that would be around 27 deg? Then I need to add 1 deg per 10 kpa below 100kpa? Today the car is boosting 1.2 in mid and down to 0.9 in top revs. But since the engine is an low cr, 2l crank and 3l pistons, 93x66,2 - it needs more a...

I started my 2.7V6 on the Megasquirt ems this weekend. The base tune is surprisingly good, so no problem driving the car. But, do any of you have an ignition map for an V6? I really have no clue how to put this on an turbocharged V6. A 2.8V6 ignition map would be pretty close I suppose. Would be nic...

Very nice indeed! Fantastic to see these engines in this condition - I love the Alfa V6! Just an little tip; -would be a lot easier to start with the coil cable attached, -and kind of an performance boost when you remove the safetycap from the turboinlet :lol: :lol: Just fantastic! Great job on thes...

Hello! I have not calculated the CR - but the engine is surprisingly fast revving and very good torque without boost - much better than standard 2l - the cc comes in here I think.. How is the 24V block compared to the 12V? Those have oilsprayers in the block? Will an 12V head fit an 24V block? What ...

Hello all! Nice projects going on here! Maybe this is not the right place to place this questions - but anyways - here goes! See that there are some v6s here that are turboconverted - you guys would have some experience I think... Myself I have made an 2.7l for an 96 GTV TB. I bored the 2l V6 block ...