Hello all,
I am rebuilding my Procharger C1 after a couple of runs up the strip the main bearing let go allowing the compressor wheel said hello to the volute! The car is a Dax Rush kit car, with rover 4.6 V8. Before this I had done probabbly 2000 miles on the supercharger and all was fine, only recently changing the oil.
Luckily the volute is only a little scuffed, I will need to replace all the bearings. The high speed compressor side bearing have a small bearing within a large bearing, seems a strange arangement to me, I guess it allows them to use two lower speed rated bearings. The C1 is rated at 80,000 and I was driving it at that when it let go. It is marketed as for compact cars but I was using it on a 4.6 rover V8 and it was working good, seeing 7psi on 3/4 throttle and 5000 rpm. Red line at 6k.
I can't get original procharger bearings or compressor wheel so have been looking to source my own.
Bearings are:
Input pulley bearings; ID OD Thk
1x Koyo 6305 C3 Japan 25 62 17
1x Koyo 6203 C3 Japan 17 40 12
Output compressor bearings;
1x Koyo 6009 C3 Japan 45 75 16
1x THRUST NHBB USA ME-1203 DL 17 40 12
1x FAFNIR OIS LOT 3220 THRUST USA 7202W 15 35 11
Oil slinger
2x Koyo 6000 C3 Japan 10 26 8
The input pulley bearings are easy to get but I'm struggling to get the high speed compressor wheel angular contact bearings. I found an SKF 7203 CD/HCP4A and 7202 CD/HCP4A and a barden bearings part number barden 203HJH & barden 202HJB which are all rated in excess of the 80000 blower limit but know where seems to sell them? Any one got any ideas???
My case didn't have a spring washer for the compressor shaft angular contact bearings, maybe this is why it failed?? I thought angular contact needed some axial preload?
Also regarding the compressor wheel, the C1 has a 70mm inducer and a 108mm exducer, the C2 has a 80mm inducer and a 108mm exducer. I've been looking at turbo compressor wheels and the garratt GT4508 and GT4708 seem a good match using a 79mm inducer and 108 exducer. Does anyone know if the C1 and C2 share the same volute, just machined to acept the C2 larger inducer size? The C1 certanly has a lot a meet around the inlet and could easily be opened up to 80mm just don't know about the inner area?
My C1 shaft is 0.5" the the garratt's use something like a 8-9mm shaft so I could easily bore the wheel to fit my shaft.
All help or oppinions most welcome,
Tom.
I am rebuilding my Procharger C1 after a couple of runs up the strip the main bearing let go allowing the compressor wheel said hello to the volute! The car is a Dax Rush kit car, with rover 4.6 V8. Before this I had done probabbly 2000 miles on the supercharger and all was fine, only recently changing the oil.
Luckily the volute is only a little scuffed, I will need to replace all the bearings. The high speed compressor side bearing have a small bearing within a large bearing, seems a strange arangement to me, I guess it allows them to use two lower speed rated bearings. The C1 is rated at 80,000 and I was driving it at that when it let go. It is marketed as for compact cars but I was using it on a 4.6 rover V8 and it was working good, seeing 7psi on 3/4 throttle and 5000 rpm. Red line at 6k.
I can't get original procharger bearings or compressor wheel so have been looking to source my own.
Bearings are:
Input pulley bearings; ID OD Thk
1x Koyo 6305 C3 Japan 25 62 17
1x Koyo 6203 C3 Japan 17 40 12
Output compressor bearings;
1x Koyo 6009 C3 Japan 45 75 16
1x THRUST NHBB USA ME-1203 DL 17 40 12
1x FAFNIR OIS LOT 3220 THRUST USA 7202W 15 35 11
Oil slinger
2x Koyo 6000 C3 Japan 10 26 8
The input pulley bearings are easy to get but I'm struggling to get the high speed compressor wheel angular contact bearings. I found an SKF 7203 CD/HCP4A and 7202 CD/HCP4A and a barden bearings part number barden 203HJH & barden 202HJB which are all rated in excess of the 80000 blower limit but know where seems to sell them? Any one got any ideas???
My case didn't have a spring washer for the compressor shaft angular contact bearings, maybe this is why it failed?? I thought angular contact needed some axial preload?
Also regarding the compressor wheel, the C1 has a 70mm inducer and a 108mm exducer, the C2 has a 80mm inducer and a 108mm exducer. I've been looking at turbo compressor wheels and the garratt GT4508 and GT4708 seem a good match using a 79mm inducer and 108 exducer. Does anyone know if the C1 and C2 share the same volute, just machined to acept the C2 larger inducer size? The C1 certanly has a lot a meet around the inlet and could easily be opened up to 80mm just don't know about the inner area?
My C1 shaft is 0.5" the the garratt's use something like a 8-9mm shaft so I could easily bore the wheel to fit my shaft.
All help or oppinions most welcome,
Tom.