Technical > Spud Miller's Cave

Low percentage of Nitro with Carb

(1/2) > >>

alkyal:
Like others, Need a little extra power. Running pure methanol thru an Alky Specific Carb. Currently the Carb is set-up to run on the rich side. Only want to run approx max of 10 % . Due to components in Engine. Biggest factor being the CAST Hyper pistons and the PM rods. Have access to nitro and have a FIE hydrometer set-up. Thanks

Spud Miller:

 Sure, your system will do it and you'll see a power gain. I'd start with 5%. If things look ok, try increasing a couple of percent at a time. I think you'll find that you need to richen the jets and idle in the carb. So, if you're prepared to do that, 10% shouldn't pose a problem.

Keep in mind that reducing timing a few degrees to start with would be a good idea. Also running some toluene in the fuel (one quart per 5 gallons) would help to reduce the chances of destructive detonation. That's been covered in other threads here.

If you start detonating, it could make quick work of those rods and pistons.

 Spud

alkyal:
Thanks for your quick reply. Flat Top 350 engine With CI heads. Running locked ignition now @ 34 deg total. What amount would you recommend for total timing. On pure Alky the best HP-TQ on the dyno was @ 36 deg total timing. Will for sure add the Tol. as per a previous post of yours. Thanks again for your help. Al

Spud Miller:

 34 degrees outght be fine for flat tops. Try a couple more later after you know things are working.

 Spud

ricardo1967:
Prediction... once you get hooked, you won't stop at 10%...

What the compression ratio?

Navigation

[0] Message Index

[#] Next page