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56 Posts
Hi all,
I finally got the goodie i have been dreaming about: Eaton M112 supercharger from a V8 Jaguar. It will boost my '87 C10 6.2.

Superchargers are not common in 4 stroke diesels, i know, but for me that is just a reason to supercharge. Why? Why not?
Other than doing something uncommon, i prefer SC because
i neved had one before,
i don't like turbo whistle and i do like v8 true duals sound,
i don't like on-off triggered turbo boost but i do like flat torque curve like in a big block,
project with SC is more interesting than playing with turbo exhaust pipes,
contemporary SC with a boost by-pass the parasitic energy loss is manageable,
superchargers have bigger wow-factor
The plan is to mount the SC on a side of the engine and route a pressure tube from there. For by-pass i am looking for a small (~2"/50mm) throttlebody (tips where to find?) and will program a micro-controller to run a model airplane servo that actuates the valve. Micro-controller inputs are TPS and TCC. So that on idle and TCC engaged the by-pass is mostly open (0.5 - 1psi) , and per TPS the boost gradually increases up to ~10psi. The boost curve adjustment will be try&error.
I think i will mig-weld the SC crank pulley to front of the accessory pulley. However, it is surpringly hard to find a steel (weldable) pulley with 8 grooves and diameter 8 - 9". The pulley on SC is 8-groove 2.8". Eaton M112 can take 12krpm and flash 14krpm. So at 3800 rpm engine redline and 9" crank pulley would equal 12200 rpms at SC. i think a 6-groove pulley and belt would work too, although SC end has 8 grooves pulley. What do you think?
Do you know any OEM pulleys to look for? The pulley diameters are not listed on replacement parts. The pulleys that Supercharger companies offer are ridiculous priced, like $300 for a metal ring. And they are usually aluminium which makes mig-weld impossible, and there are hardly any big enough diameter pulleys, due to the fact that gassers rev higher. Any tips to find the pulley are appreciated.
I might update the thread with news and pics when progress, if you're interested.
Any comments and ideas are welcome for the project.
Thanks
.
I finally got the goodie i have been dreaming about: Eaton M112 supercharger from a V8 Jaguar. It will boost my '87 C10 6.2.

Superchargers are not common in 4 stroke diesels, i know, but for me that is just a reason to supercharge. Why? Why not?
Other than doing something uncommon, i prefer SC because
i neved had one before,
i don't like turbo whistle and i do like v8 true duals sound,
i don't like on-off triggered turbo boost but i do like flat torque curve like in a big block,
project with SC is more interesting than playing with turbo exhaust pipes,
contemporary SC with a boost by-pass the parasitic energy loss is manageable,
superchargers have bigger wow-factor
The plan is to mount the SC on a side of the engine and route a pressure tube from there. For by-pass i am looking for a small (~2"/50mm) throttlebody (tips where to find?) and will program a micro-controller to run a model airplane servo that actuates the valve. Micro-controller inputs are TPS and TCC. So that on idle and TCC engaged the by-pass is mostly open (0.5 - 1psi) , and per TPS the boost gradually increases up to ~10psi. The boost curve adjustment will be try&error.
I think i will mig-weld the SC crank pulley to front of the accessory pulley. However, it is surpringly hard to find a steel (weldable) pulley with 8 grooves and diameter 8 - 9". The pulley on SC is 8-groove 2.8". Eaton M112 can take 12krpm and flash 14krpm. So at 3800 rpm engine redline and 9" crank pulley would equal 12200 rpms at SC. i think a 6-groove pulley and belt would work too, although SC end has 8 grooves pulley. What do you think?
Do you know any OEM pulleys to look for? The pulley diameters are not listed on replacement parts. The pulleys that Supercharger companies offer are ridiculous priced, like $300 for a metal ring. And they are usually aluminium which makes mig-weld impossible, and there are hardly any big enough diameter pulleys, due to the fact that gassers rev higher. Any tips to find the pulley are appreciated.
I might update the thread with news and pics when progress, if you're interested.
Any comments and ideas are welcome for the project.
Thanks
.