Super Powers
Member
The Keystone Turbo kit for my 339 Hercules diesel will arrive soon and I'll be installing it on my pulling tractor this week.I'm not a career mechanic but have spent my life around and working on all kinds of engines and machinery and always trying to learn more.I understand the basics of turbocharging and I just want to run my install/setup plans by you guys one last time in hope you'll point out anything I'm missing or might do wrong.
First off,I realize the risks involved with adding boost to a NA,high compression(18 to 1) diesel.I'm not looking for huge power gains but just want to add enough boost to burn the extra fuel the American-Bosch pump can deliver,which I've been told isn't much.
Here's my plan to minimize the chance's of failure.
The engine and fuel system were overhauled 200 hrs ago and are still in good shape.
The air intake is free of restrictions and has a K&N filter.
The pump is turned up to max HP(80)and the tractor has lots of black smoke under full load.There is still some additional fuel left to use though only a couple more turns on the pump adjust rod.
I plan to leave the governor and rpm's @ their stock settings,at least for now.
A while back I advanced pump timing 3 degrees and saw no HP gains so timing was put back to it's stock 25 BTDC setting.
Now I first plan to retard pump timing to only 20-22 and make a dyno pull to see how it effects max HP before changing anything else.Even if I loose a few hp before turbo,the trade off of reducing the cylinder pressure under boost and keeping the head gasket intact would be worth the trade off.
I hope if I can make this work I should get much more hp back after turbo when I'm done.
Then I'll check the torque of the head nuts to ensure it's proper since it hasn't been checked since it's overhaul.
Because I want a stock rpm tractor that will have it's torque at 12-1700 rpm,my turbo isn't huge and should produce a max 10 psi boost.Even still,it has an adjustable waste gate and I'll start with low boost.
I'll leave the fuel adjustment alone at first to see how much boost it takes to clean up the smoke.Then I'll max out the fuel and see how much more boost is needed to get max HP and little or no smoke under load.I'd like 20-30 extra HP with more mid-range torque and hope I can achieve all this with a max 8 lbs boost,hopefully less.
If it survives all this and a few more short,full load pulls on the dyno,I'll button it up and go pulling,fingers crossed.
So,besides taking a perfectly good,hard to find diesel and risking it's well being in hopes of gaining a few HP,is there anything I'm missing or wrong with this plan?
I guess my biggest question is how much to retard the pump timing,if at all?
With my governed mild rpm's,I'm thinking as far as I can won't hurt and would be safest until I see a significant drop in HP before turbo.
Thanks in advance for any input and for enduring this long post.
First off,I realize the risks involved with adding boost to a NA,high compression(18 to 1) diesel.I'm not looking for huge power gains but just want to add enough boost to burn the extra fuel the American-Bosch pump can deliver,which I've been told isn't much.
Here's my plan to minimize the chance's of failure.
The engine and fuel system were overhauled 200 hrs ago and are still in good shape.
The air intake is free of restrictions and has a K&N filter.
The pump is turned up to max HP(80)and the tractor has lots of black smoke under full load.There is still some additional fuel left to use though only a couple more turns on the pump adjust rod.
I plan to leave the governor and rpm's @ their stock settings,at least for now.
A while back I advanced pump timing 3 degrees and saw no HP gains so timing was put back to it's stock 25 BTDC setting.
Now I first plan to retard pump timing to only 20-22 and make a dyno pull to see how it effects max HP before changing anything else.Even if I loose a few hp before turbo,the trade off of reducing the cylinder pressure under boost and keeping the head gasket intact would be worth the trade off.
I hope if I can make this work I should get much more hp back after turbo when I'm done.
Then I'll check the torque of the head nuts to ensure it's proper since it hasn't been checked since it's overhaul.
Because I want a stock rpm tractor that will have it's torque at 12-1700 rpm,my turbo isn't huge and should produce a max 10 psi boost.Even still,it has an adjustable waste gate and I'll start with low boost.
I'll leave the fuel adjustment alone at first to see how much boost it takes to clean up the smoke.Then I'll max out the fuel and see how much more boost is needed to get max HP and little or no smoke under load.I'd like 20-30 extra HP with more mid-range torque and hope I can achieve all this with a max 8 lbs boost,hopefully less.
If it survives all this and a few more short,full load pulls on the dyno,I'll button it up and go pulling,fingers crossed.
So,besides taking a perfectly good,hard to find diesel and risking it's well being in hopes of gaining a few HP,is there anything I'm missing or wrong with this plan?
I guess my biggest question is how much to retard the pump timing,if at all?
With my governed mild rpm's,I'm thinking as far as I can won't hurt and would be safest until I see a significant drop in HP before turbo.
Thanks in advance for any input and for enduring this long post.
