2276 Draw through 'glass buggy. It's finally happening!

[slayer61]

Alright then. She's back together on the workbench, for as far as I want to take it. Once I can get some assistance in the shop from the nephew and brother, we can stuff it back in and hook up the fuel and electric to it! Progress

[woodsbuggy1]

Awesome, keep up the good work, cant wait to see it all come together.

[slayer61]

Awesome, keep up the good work, cant wait to see it all come together.

Thank you Sir. I'm hoping for a better showing this time. I'll keep you updated

[slayer61]

I'm pretty determined to NOT grenade my motor from detonation.... again, this time. It's just getting too expensive

The NA motor was pretty happy with the timing set at 32 degrees BTDC. Now that I have proper turbo heads and a much tighter deck, I have backed NA/vacuum timing to 30 degrees BTDC. After some insight, I have decided to set a target goal for boost pressure of 10 pounds... eventually. At this point, I have set my boost retard timing down to 17 degrees BTDC at 10 pounds.

It's a lot of math, but my timing map might make more sense?

Am I missing anything glaring? Hints or suggestions?

[slayer61]

Update: I spent boxing day afternoon in the shop, and with my wife's help, we got the motor down off the workbench and onto the new lift cart. We were also able to get the motor reinstalled into the buggy. Now it's details and tuning for the new turbo and heads.

Be well

[slayer61]

Closer yet!
The "structural " portion is complete. It's not going to fall out. The oil system is complete, minus the oil filter. The carb and intake is complete and linkage/cable is done. Fuel line and turbo dump need finishing and plug in the A/F sensor.

[slayer61]

It's in and running! Success! And this time it appears to be oil tight.

I set it back to the jetting that Car Craft put in it, rather than the jets i thought it wanted, the timing is set to 10 or 12 or something at crank and idle, advancing to 30 degrees all in by 2500 rpm. Now, mind you, it probably never got to operating temperature this morning, but I could still watch it go lean at idle and stall if I didn't catch it with the throttle. This is what caused all this heads, turbo swap etc. I'll keep you updated if I get the chance to drive it about.

[Clonebug]

That red muffler looks familiar.......is that a 3" exhaust???? I have that same muffler since it was the shortest one I could find. It takes the edge off but that's about it.

What rpm is your idle at???
Draw through has a long way for the fuel mixture to go and you could be experiencing some puddling of fuel if the air velocity is lower when at a slower idle speed.
It will show as a black cloud of smoke on blipping the throttle after idling for a time. The hesitation can be from the throttle plate being a considerable distance from the engine.
Your intake and turbo is setup up ideally in that there is really no place for fuel to get caught but you could get air/fuel separation from a cold intake wall and fuel droplets forming on the intake tube walls.
Try idling at 1100-1200 rpm or a little higher.
Take your time tuning it and don't go all boost crazy right off the bat. Keep it down to 6-8 lbs. boost and maybe a max of 25 degrees timing at 8 lbs. boost. Work the timing up or down from there and listen carefully for detonation.
Draw through has an advantage in that intake temps will stay low due to the cooling of the air through the venturi effect but it only goes so far.

[slayer61]

Hi CB. The exhaust was... "inspired" by yours. A couple of bends and a "muffler" from Summit, and drop them off at the muffler shop.

It doesn't actually "idle" yet. I've only started it the one time, and if I didn't keep feathering the throttle, the A/F gauge would show it going lean and stalling. I just need to be patient and let it get up to temperature, and maybe then, a stable idle can be achieved.

Right now I believe I have the boost set at 5 pounds max. I'm still a little gun shy after the previous events and I'm currently pulling 1.3 degrees per pound of boost.

Thanks for checking back in on my progress. Much appreciated