This may be of interest? I have a TS1 253 with EX Box, VHSH and Augusto 7000. Similar port timing to those mentioned above. (64x71 5mm added to top of barrel) I used to have it paired to a Franspeed Race which made 28BHP and 21ft/lb. (4.8 final drive) I changed to the EX Box and lost 7 horses and 5...

So I finally resolved the poorly fitting head but I now had issues fitting my exhaust stub. If you use the studs provided there is insufficient clearance for nuts. The fitting video talks about and shows dome headed Allen screws but these weren’t supplied. My final moan is that there is a recess ca...

Peak at around 6500...? I'm surprised by it being at such low RPM, even with a touring tune. My old touring tune TS1 was detuned from standard but (base of cylinder machined to reduce transfer timing) still had best power between 7500-8000. When trying pipes with lower RPM range I simply found that...

I should have pointed out that the peak is around 6500.

Also, the first run was with less retard but comes in earlier. Curve a which starts retarding at 4000 from 21 to 16 at 6000.

Adam, I've got c curve with 22degrees starting point which means that at 5000 it's at 21deg and starts retarding. It's at 14deg by 7800. At 6000, it's around 16deg. I'm not convinced that's the problem, but I'm removing it just to try. I did intend to have a go today but I couldn't find the number p...

Adam, I've got c curve with 22degrees starting point which means that at 5000 it's at 21deg and starts retarding. It's at 14deg by 7800. At 6000, it's around 16deg. I'm not convinced that's the problem, but I'm removing it just to try. I did intend to have a go today but I couldn't find the number p...

Cheers adam. That's very interesting, especially as you're running an ex box too. It's a long time since I built the motor, but I really don't think it's an assembly issue; I kept notes, the squish is 1.2mm and I spent an age getting it 100% leak-free. So, my thinking was to set it at 18 (maybe 19 a...

Muppet wrote: ↑

Thu Feb 07, 2019 6:22 pm

i always run more advance on a box pipe than a expansion type on fixed ignition

That's 2 people told me that today.

19 degrees? I've got an avanti head, so it cools well.

Bgm reed block. Boyesen reeds. Bgm 30mm inlet with built in stuffers.

I'm suspicious of the ignition. Thinking of trying it fixed at 18.

Yes, I expected a bigger number. More like 20bhp. However, it made 20bhp with a JL3 without any set up at all, just guessed jets. So maybe I was unrealistic?

By way of comparison, I had a tuned gt186 with bgm clubman that made 17bhp. Darrel Taylor's dyno for that one though.