2270cc type 4 EFI Turbo: my first engine build

[Wally]

I need to get back on my T4 build. I have parts for a 78x103. 48x40 six stud heavily welded heads, etc. Been collecting parts for 20 years for the build

Yeah, get your finger out Steve, now is the time

[Wally]

On the other hand, are the (EDIS or) VW 4 post type coil pack in wasted spark enough for my 400BHP target?

Yes, my experience that it certainly does. You really don't need sequential for a certain hp rating. I never needed it either. Wasted spark does more then you would think

[split1950]

On the other hand, are the (EDIS or) VW 4 post type coil pack in wasted spark enough for my 400BHP target?

Yes, my experience that it certainly does. You really don't need sequential for a certain hp rating. I never needed it either. Wasted spark does more then you would think

That makes it easier to source an EDIS here! I am going to run sequential injection still. I had read about spark blowing out at higher boosts but yours is much higher than I can get to!

[panel]

EDIS is so old school now. Not many people build MS with EDIS I don't think anymore.

[Wally]

Hence the EDIS part between brackets in my reply

[split1950]

I Was being a bit lazy typing ....I was thinking about the VW version but need to research a bit considering the J&S Interceptor knock sensor solution. I'm using a DTA S60 ECU so I need to check how to handle it - it seems the VW coil is a dual coil.

[Clonebug]

I Was being a bit lazy typing ....I was thinking about the VW version but need to research a bit considering the J&S Interceptor knock sensor solution. I'm using a DTA S60 ECU so I need to check how to handle it - it seems the VW coil is a dual coil.

Mario has those VW coils and uses them for his wasted spark setups.

They are a better part since the plug wires are more standard than the EDIS coil side specific wires. Not that it matters once you have the wires.

I've been using the EDIS coil since 2011 and it's never given any issues. A 1997 Ford F-150 5.7L has wires of all kinds of length that you can pick through to mount your coil anywhere on a Volkswagen except maybe the front trunk.... They range from about 14 inches all the way to about 48 inches long and there are two of each.

[split1950]

I've actually found a 4 coil pack version from VW, fitted to some 2.0 engines like used in Jetta and Beetle VW part number 06A905097

VW sequential coil picture.jpg

Anyone used one? I've found stuff where people have run them on 16V Golf Turbo conversions so assume they must be OK, I suppose they have more time to charge than dual coil in wasted spark.

[Clonebug]

Looks like a nice package for sequential ignition. I'll have to save that for future reference.

[buguy]

Sure does. Nice and compact.

[split1950]

OK so the genuine full sequential coil pack just arrived, I managed to get an OEM connector too

My ignition coil pic.jpg

The 911 fan is getting powder coated tomorrow, should be back soon, I'm really looking forwards to seeing how that turns out.
The body is moving along, it's done (ready for paint when he opens again).
I'm running 944S2 alloy rear arms, after a lot of thought they are getting narrowed ~50mm and modified for the bolt in pivot mount structure concept to pull the 7J wheels right under the wings. We're allowing for -1 degrees camber at ride height and and still maintaining the Porsche designed in geometry as much as possible. We made a new piece that bolts to the spring plate and are rear mounting it- all adds up to getting the 50mm. The only downside is probably I'll need custom drive shafts, I might get lucky and find something though...…

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I wanted to avoid cutting the Split bug frame horns to clear the 100mm CVs, so might raise the gearbox a bit, or look at 94mm Type 1 CVs - anyone running big HP on T1 CVs and can tell me if I'd regret that?

[Wally]

Wow! Thats a bold move to cut and reweld alu trailing arms.
Then again, I drag raced welded (also alu) rims

You said you wanted to retain the stock porsche geometry, but the angle the pivot now points to (straight forward), seems to greatly alter the geometry. Bit ladder bar like set-up you are creating iof you know what I mean? I think you're set-up probably doesn't change camber much when going up or down, more straight-line orientated? Interesting, but really like to hear your thinking or considerations behind this!

BTW, as far as I know, type 1 CV's are referred to as 90mm. Stock once are hopeless from n/a 2,4ltr type 4's onwards. So from 200+Nm torque, you are done with stock CV's. Not sure if there are upgraded stock sized CV's?

I like the coil. Might be an idea for twin spark as well. I also run the DTA S60 and I now run dual wasted coils, so instead of 2 sparks, I have 4 sparks firing at once. It still works (again, after I used the extra ground of the ecu casing itself), but I can see limitations of my current set-up.
I see 6 connections. I understand 5 (4 triggers, 1x 12V), but whats the 6th terminal for?

[split1950]

Yeah it is a bold move, not taken lightly. The welds are from both sides (except at the small bush end, but that is only control, not full car load), probably some gusseting will get done too. The rubber bushes should help avoid some of the nasty abuse getting to welds, I hope.....
I took a punt on that coil to try it out, not sure about dwell time though, I've read it protects itself if the dwell is too long by firing, = massive advance = knock = dead pistons. I'll measure some stuff once its running, plus I'll have the Interceptor as a fail safe although I prefer it is only that and not rely on knock retard. I think 2mS is safe, but DTA says 2~3mS is normal. The guy ran it in wasted spark so paired 2 inputs, in effect doubling the RPM from the coils perspective??? So I've never seen it used in true sequential...….
The 6th connection is Ground. So in case you try it (plug is numbered 1~6 L to R, outputs A to D are also L to R) 1 = battery negative, 2 = In A, 3 = In B, 4 = In C, 5 = In D, 6 = Ignition switched live

[Wally]

Did you buy the Interceptor for a wasted spark operation? Does it also work in sequential mode? I'am not sure, maybe the newer ones do indeed (through a switch on th eunit perhaps?).

[split1950]

I haven't actually bought that yet, it's the plan. From what I understand it also works for smart coils (like this) and for sure in sequential mode. I think you just select 4 cylinder and it probably senses the inputs from the ECU and knows a knocking cylinder will come round again after the other 3 have fired. Funny you should ask that, one reason why I avoided wasted spark was I was afraid running sequential injectors and wasted spark (to 2 ECU coil outputs) might find a corner case where the J&S didn't work, so I decided go full on sequential on everything to be safe!? I bought enough stuff that ended up not getting used / sold on!!