Just had my 914/6 with original case, 86mm pistons/cyl, Solex cams dyno tuned. 137 hp at wheels or about 170 hp at flywheel using this calculator:

http://www.mk5cortinaestate.co.uk/calculator4.php



Click to view attachment

What's that, a short-stroke 2.4?

Impressive scoot!

It is the short stroke but 2mm bigger bore making it about 2.25L displacement.

This is the dimension engine I have. 86 x 66 -> 2.30 L.

What type of pistons and compression do you have? I have not taken mine to
dyno.

They are JE pistons with biral cylinders. This is what JE told me and I ended up with 1.0mm spacers to ensure piston to valve clearance:
.25mm 10.2:1
.50mm 9.9:1
1.0mm 9.3:1

What heads are you running??

I just got my very similar 85mm x 70.4mm motor running with 36mm ported intakes, mod solex cams (DC-30) and 9.5 JE's. I am hoping it makes close to 190 and that seems feasible after seeing your numbers. Still tuning

What heads are you running??

I just got my very similar 85mm x 70.4mm motor running with 36mm ported intakes, mod solex cams (DC-30) and 9.5 JE's. I am hoping it makes close to 190 and that seems feasible after seeing your numbers. Still tuning
[/quote]

2.7L heads

[quote name='puffinator' date='Sep 4 2015, 07:48 PM' post='2232994']
What heads are you running??

I just got my very similar 85mm x 70.4mm motor running with 36mm ported intakes, mod solex cams (DC-30) and 9.5 JE's. I am hoping it makes close to 190 and that seems feasible after seeing your numbers. Still tuning
[/quote]

2.7L heads
[/quote]

Puff Check your PM's

I had a Solex cammed short stroke 2.5 in my first 914-6. The engine would pull hard all the to 8k. With 2.7 heads you should have plenty of breathing room to go higher than 6200rpm. What size venturies are you running? You may want to go up a size. what were your AFRs?

cheers,
dug

I had a Solex cammed short stroke 2.5 in my first 914-6. The engine would pull hard all the to 8k. With 2.7 heads you should have plenty of breathing room to go higher than 6200rpm. What size venturies are you running? You may want to go up a size. what were your AFRs? Can you post a better scan of the sheet or maybe put it in excel to make a graph?

That dip in the torque at 3500 looks familiar too:) I believe it's going rich there from the lambda numbers. Mine had the same problem. If you want to dive deeper into tuning the webers, there's a great thread on Pelican called Gordos PMO tuning or something like that. Several experienced guys giving him guidance and his careful posting about each change has given me a better understanding of how the idle and main circuits interact and how you can change that super important part of the tuning with the less understood air correctors and emulsion tubes.

cheers,
dug

the AFR (air/fuel ratio) went from the 10-11s below 4000 rpm and were at 13.38 at 6200. I am running 32mm venturis and the tuner suggested i might want to go up. I'll post another picture or graph of hp, torque, AFR. Lambda was running at .91 at 6200

It sounds like your mains are coming on too early, while your idles are still providing a lot of fuel. Thats why it goes super rich at 3600. A larger venturi will weaken the signal to the main, this will help delay it starting, but since you were already leaning out at 6200 you will also probably want to go bigger on the main jet size, or smaller on the air corrector. Try to only change one thing at a time.

If you order parts from PMO, Richard will also give you his sage advice. But not until after you send in your order:)

cheers,
dug

I think you bought the high compression version, I bought the 'low' compression
version. I ended up with about 9.2:1, and one side of the engine needed .5mm
base gaskets.

Don't listen to tuners unless they are weber experts. I highly doubt that you need
a larger than 32 venturi for a streetable 2.3L.

I am not changing anything. I tried tuning the webers myself after the build and got nowhere. Burping and backfire. So I took it to a very experienced dyno tuner, John Behe, and he went through a number of jet combinations. He knew I wanted it primarily for street driving so he narrowed it down to the combination that drives great.

Thats cool. Drivability is way under-rated:)
Glad you're driving and enjoying it!
cheers,dug