UK’s 78 SN

As you can see I have some old marine diesel turbos I have been playing with this how I have converted them to run off a Gas engine.

These are Volvo Penta units AKA kkk K27 turbos now part of Borgwarner trying to get OEM parts over here is not good.......just been given the run around by the official turbo suppliers ...... only happy to sell me a new one to change over......not good in the UK ... a lot of KoolAid around..... these turbos are a hybrid made by kkk using K27 turbines housings with a K29 fast spool compressor housing......yet to find boost maps for this combo.

Been collecting marine turbos for a while now it seems the Volvo Penta come up more here in the UK but my guess is most makes will change over with a little work......I managed to find an unofficial turbo parts supplier and rebuilt the turbos like this.

Your see the 3 turbine housings are all the same AR/size of flow but the one at the back has only 6 bolt clamping where the other 2 have 8 same part number just has cast #2 where the 6 bolt has #3 if you find this one life is good as it is a straight swap for the turbo shaft housing otherwise you will need to turn the flange off and turn down 1mm then turn the clamp ring on the housing.......all the other parameters are the same.








The turbine are the same size as a 911 turbo (sounds cool but they fit hundreds different engines) the hardest part to find is the compressor back plate.......no help from dealers and only have one so as it’s a flat shall make one this is my first test in Mdf before I run it out of the engineering grade Ali

First fit up.........all good now needs to be sent off for balancing

Roger can I be you apprentice? Cool stuff!

Roger ,
Just think of what you could achieve if you could have easy access to the parts and materials you want!!
Too cool Monty

Keeganino wrote: Roger can I be you apprentice? Cool stuff!

Keegan....next time your over pop by and if your on one of the Harley's you work with how cool would that be I think you need to open a shop up in the UK.

79TiqueRebuild wrote: Roger , Just think of what you could achieve if you could have easy access to the parts and materials you want!! Too cool Monty

Thanks Monty.....I have a long list of stuff you guys have which is not available here shall keep looking out for stuff or ways round the problems

Roger,

Very Nice! Are going to plumb up the exhaust yourself? Dry runners into a collector to the turbo then to the wet exhaust(lots of heat) or jacketed runners to the turbo, (Less heat, but less energy for the turbine)?

Pressurised airbox through a carb or EFI? How much boost are you aiming for? Initial compression ratio? Inquiring minds would like to know!

110 octane or aviation gas? That should pull pretty well!

Are you (You are) building a new doghouse!!!!?

uk1979 wrote: Did these a year or so ago, may be of help to others and could help keep the average age of boats here down Sorry but sizes are mm Sizes taken off my old stringers at the wide side of each,always check your ones are the same if you use the above drawings on your project. Have Cad file if you need to print full size for template.

Would these work on a 1983 SN??