242GT 16 valve progress

[qwkswede]

I have been making some slow progress on my 16valve turbo project lately, I have a few pictures to share.

I have been dragging my feet on the whole thing, because I didn't want to disable the car. I need it for backup transportation. I have a pretty long daily commute, and would really hate to be without a running car if something failed. But, staring at the pile of parts finally got the best of me. I decided to have faith in my 740 for transportation and started dissassembly of the 242 for the engine swap. Right now, I am just trial fitting the head to start work on the header and intake.

Here is a teaser:

Some more pictures and info are on my website at: www.denverspeed.com/242gt.html

There is way more room for the turbo than I expected. I'll start building the header over the next couple of weeks.

I was hoping that I could use one of the existing Volvo distributors somehow. Either the rear mount distributor with a little firewall massaging, or the block mount distributor somehow. But, really it now looks like I am going to have to figure something else out. The Ford EDIS/megasquirt setup might be the way to go with this. I just can't see how I can get a distributor to fit on this thing. So, i guess I am back on the hunt for an adapter to fit the Ford trigger wheel to my crankshaft.

Anyway, thats all I have time for now.
-Ken

 

[DurableSwedish]

awesome! I cant wait until you get that thing finished!

 

[olov]

wow, love the website, lots of good info. sounds like you are doing this build up the right way. please take lots of pics when stuff starts going in the 242. hope you can figure out the dizzy prob easily.

edit: r u going to o-ring the block?

 

[n xntrx volvo]

what are you doing for an intake?

 

[qwkswede]

For the intake I think I am going to cut up a stock 16 valve intake to use the flange, runners, and injector bosses. I'll build a new plenum with the throttle body in a better location and enough clearance around the brake system. Thats the plan for now anyway. Maybe I can even get everything nicely polished up for some style points.

 

[the poi]

whats the problem with the block mount distro?

 

[coldfusion21]

i think the head is too wide, so the block mounts dont fit becuase of how the head widens out, but i could be wrong. whats the prob with the 16v distro?

 

[jao]

16v block mount dizzy

IIRC you can use a SAAB [?] 'crab' style cap and machine ~1" from the stock block mount dizzy it should work with the b234f intake manifold...

good luck!

 

[linuxman51]

the thermostat housing is in the way. its nowhere near in the way of the manifold. in fact, I can't get the block mount out of my motor now unless i take the head off first.

 

[qwkswede]

IIRC you can use a SAAB [?] 'crab' style cap and machine ~1" from the stock block mount dizzy it should work with the b234f intake manifold...

good luck!

Interesting idea. I'll have to look into that. But, as mentioned. The distributor will not come out without removing the head because the water inlet is directly above it.

 

[pbonsalb]

What about cutting a triangular section out of the intake runners and having them rewelded back? That would probably solve the fit and clearance problem and also shorten the runners, which can be better for top end power. I have not really started by 16V conversion, but was thinking about relocating the TB to the front of the plenum. However, I am not sure this is possible. Some sort of hybrid, using half of an early B21 intake and the flange and stubs from a 16V might work.

Philip Bradley

 

[MattP]

You could use the front dizzy for the hall sensor signal for the MS and use a GM wasted spark setup for the coils and plug wires. That way you wouldn't need to mount an EDIS trigger wheel.


Phillip,

There is a picture around here somewhere of a swede who made the stock B234 with a front TB. There was a lot of welding.

 

[JonnyP]

directions: click add to favorites, click create in volvo folder, click ok
thank you

Is fire wall bashing not an option??(dist..)

nice pics. I will be watching this build up.

GT forever

 

[n xntrx volvo]

do the pz's even have the cut out for the rear mount? what dizzy do aq171's use to get around this problem? is it something that could be adapted to a hall sensor?

 

[qwkswede]

The PZ cams do have the slot for a rear mount distributor. My marine head came with a rear mounted distributor installed. I need to make a plate to cover that hole too.

MattP, What GM cars have the wasted spark coil pack setup? I might have to look into that. Though, thinking about it. I don't understand how you would find TDC of cylinder 1 using the Volvo hall sensor. To make the wasted spark work, you would need some reference to the crankshaft to fire the two separate coils in synch with their respective cylinders. I didn't think Megasquirt had a provision for this. Anyone know something I don't about this? I could probably implement the inductive trigger on the flywheel without too much trouble. As I understand these systems, Basically you would need two different signals, 180 apart on the flywheel to fire the two different pairs of plugs. I have run Haltech systems, and you can accomplish this with 2 flywheel magnets. One magnet with a North pole pointing up, and the other with the South pole pointing up. The two different signals allow the two different coils to be fired at the right time. If I could make that work with MS, it would be nice. But, right now, I am pretty sold on the EDIS setup. I think the multi-tooth trigger mounted on the flywheel has some desirable advantages for timing accuracy and precision.
-Ken

 

[Tenacious Todd]

I want to make a statement for you on your distributor use the distributor like the one found on the Regina ignition cars where it mount where the 200 series mount instead of bashing in the firewall to clear the rear mount distributor. Just my .02 cents.

 

[MattP]

You are right. There would be no way to discern the difference between the triggers for the coils on wasted spark. I was thinking about using the dizzy for mine as the cam signal, but that was a nonMS system. Sorry.

The PZ cams do have the slot for a rear mount distributor. My marine head came with a rear mounted distributor installed. I need to make a plate to cover that hole too.

MattP, What GM cars have the wasted spark coil pack setup? I might have to look into that. Though, thinking about it. I don't understand how you would find TDC of cylinder 1 using the Volvo hall sensor. To make the wasted spark work, you would need some reference to the crankshaft to fire the two separate coils in synch with their respective cylinders. I didn't think Megasquirt had a provision for this. Anyone know something I don't about this? I could probably implement the inductive trigger on the flywheel without too much trouble. As I understand these systems, Basically you would need two different signals, 180 apart on the flywheel to fire the two different pairs of plugs. I have run Haltech systems, and you can accomplish this with 2 flywheel magnets. One magnet with a North pole pointing up, and the other with the South pole pointing up. The two different signals allow the two different coils to be fired at the right time. If I could make that work with MS, it would be nice. But, right now, I am pretty sold on the EDIS setup. I think the multi-tooth trigger mounted on the flywheel has some desirable advantages for timing accuracy and precision.
-Ken