1983 BMW E24 635csi Track Car Turbo Build
Discussion
The mapping session went well! I think we ran into a restriction on the inlet side, as only intake temps were increasing after a point, with little climb in peak hp or torque. Either way, the car is very driveable now. The only issue we ran into was a leaking oil feed on the turbo. I am going to try some "Hot-Lock" extreme temp threadlock, as it's an issue I've had with at least two combos of fittings.
Here is the graph. As you can see, very useable power.
As a comparison, I have seen turbo M30's making 150 more PEAK horsepower with as much as 60bhp and 80ftlb less at 3k rpm, when compared to this setup.
I feel the car should be making around 15% more power at this boost level, so I may try a different intercooler at some point.
I am hoping to insulate the pumps from the body of the car asap as they are ridiculously loud, as in, louder than the engine or exhaust at full chat.
The car is now around 325bhp/tonne and 345lbft torque/per tonne. Equivalent to a Jag XJ220/Noble M12 GTO 3R for power - Ferrari Monza SP2 V12 Aventador LP770-4 SV for torque.
The next jobs will probably be to extend the cage and possibly fit larger brakes.
Cheers!
Here is the graph. As you can see, very useable power.
As a comparison, I have seen turbo M30's making 150 more PEAK horsepower with as much as 60bhp and 80ftlb less at 3k rpm, when compared to this setup.
I feel the car should be making around 15% more power at this boost level, so I may try a different intercooler at some point.
I am hoping to insulate the pumps from the body of the car asap as they are ridiculously loud, as in, louder than the engine or exhaust at full chat.
The car is now around 325bhp/tonne and 345lbft torque/per tonne. Equivalent to a Jag XJ220/Noble M12 GTO 3R for power - Ferrari Monza SP2 V12 Aventador LP770-4 SV for torque.
The next jobs will probably be to extend the cage and possibly fit larger brakes.
Cheers!
A couple of little jobs sorted today. I had some thick agricultural belting that was ideal to insulate the pump setup from the boot floor. It made a huge difference!
"Hot Locked" the oil feed - seems to have worked!
I had to go for a drive in order for the threadlock to cure. It was my first proper drive since the mapping. It was a bit greasy out and there was 0 traction in any gear once the torque came in.
A quick wash
"Hot Locked" the oil feed - seems to have worked!
I had to go for a drive in order for the threadlock to cure. It was my first proper drive since the mapping. It was a bit greasy out and there was 0 traction in any gear once the torque came in.
A quick wash
Gassing Station | Readers' Cars | Top of Page | What's New | My Stuff