Originally Posted by
Maximo
I do not know the pipe/plug preferences of the stock 28-7 as I really have not run it overly much.... And my modified 28-7 is like a completely different engine, so its hard to give you advice when we are running a very different engine then you are...... Your best bet is to try the different pipes/headers and judge for yourself what you like and dislike......... As a rule the 28-7 likes the 9886, but that is based heavily on running my modified version.....It should work great on the stocker too, but you will really have to try it and see if you like it for yourself......
How much have you run this engines so far ? how is it going for you ? what problems are you having ?
The first 8-9 tanks was with byrons 20% on friday. Then I had my first experience with byrons 30% yesterday for about 8-10 tanks(bashing). It seems to be running well, but that's only my observation with nothing to compare it to. I noticed a whole different attitude with the 30% fuel. I know I'm not supposed to put too much faith in the telemetry, but I threw a rod on my first engine, so I'm a little gun shy.
This is what I noticed. It will idle for about 30 seconds ish before it stalls, pretty good punch after 10 second idle, no hesitation. engine revs sightly before it stalls on the pinch test(3-4 seconds). still getting smoke at wide open after cleaning out bottom end. Idle gap 1mm ish. 8mm venturi. c6tgc plug.
temps are weird- if I run it pretty hard temps will go to 260, and hold somewhat steady. But I didn't continue pushing it super hard. Once, temps went to 275,but if I just stop and let it idle, the temps fall very quickly. like 30 seconds at idle and adding fuel, temps will drop 50*.
I didn't have any flame outs.
I think I'm fairly close on my tune, its fun to drive. I may have to change gearing (13/50) or diff oil to reduce wheel spin, but not until I get it in the dirt.