All Things Mk5 > Performance Modifications
Pre Cat removal
mortygttdi:
--- Quote from: vRS_Pagey on September 22, 2011, 06:09:37 pm ---
--- Quote from: mortygttdi on September 22, 2011, 05:58:00 pm ---Pagey if both your vrs and golf are diesels they don't have turbo bolts its just a clamp on the turbo to DP :happy2:
Darren
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The Golf is a soot chucker, but the vRS is a 240bhp stage 1 petrol powered hearse......... :laugh:
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Thats different then :grin: good luck with the studs mate :happy2:
Darren
JMP:
I just finished mine, intake is still off so I didnt drive it yet. Hopefully its all ok :happy2:
It was a bitch to do since I couldnt raise the car very high. So crawling under the car and trying to manouver around took me over 3 hours. If you can get car on a real lifter this is quite easy task.
The turbo nuts came out easily but I had problems with the clamp that attaches the downpipe to catback. The other bolt was so rusted that I couldnt get it off. So I had to cut it and replace with new ones. I reused all other bolts & nuts and also the turbo seal as I didnt have a new one. Hope its still ok. I didnt remove the 2nd lambda during the operation as it wasnt really necessary.
vRS_Pagey:
--- Quote from: JMP on September 23, 2011, 08:53:35 am ---I just finished mine, intake is still off so I didnt drive it yet. Hopefully its all ok :happy2:
It was a bitch to do since I couldnt raise the car very high. So crawling under the car and trying to manouver around took me over 3 hours. If you can get car on a real lifter this is quite easy task.
The turbo nuts came out easily but I had problems with the clamp that attaches the downpipe to catback. The other bolt was so rusted that I couldnt get it off. So I had to cut it and replace with new ones. I reused all other bolts & nuts and also the turbo seal as I didnt have a new one. Hope its still ok. I didnt remove the 2nd lambda during the operation as it wasnt really necessary.
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Nice work fella, look forward to hearing how you find it................how high did you get the car, and did you use axle stands or ramps?
Regarding the O2 sensors, could these not just be unplugged leaving the sensors bolted in to the down pipe?
JMP:
--- Quote from: vRS_Pagey on September 23, 2011, 05:24:11 pm ---
Nice work fella, look forward to hearing how you find it................how high did you get the car, and did you use axle stands or ramps?
Regarding the O2 sensors, could these not just be unplugged leaving the sensors bolted in to the down pipe?
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I used axle stands on the front, so not very high. To remove the downpipe of the catback you really had to go pretty far back which was a bit problematic.
Well its easy enough to remove the first lambda. I would take it out because when you start smashing the cat out, it will most likely gather a lot of dust/debris. And I didnt see where the connector for 2nd lambda was, so I just left it in. It had enough wire to be able to work on the dp.
JMP:
I drove the car today and did about ten 3rd gear 80-120kmh pulls with 10Hz GPS + race chrono in my E7. Previously I have been hitting about 3.4s (best 3.36s). Now with decat average went down to 3.2s (best 3.16s). I did have different fuel then last time, I have now 98 and previous runs were with V-power so numbers look good. 0.2s might not sound like a lot but it does take a lot of power to get that down. There is clearly more power now.
The exhaust sound didnt change much. Change was hardly noticeable.. Lets see if I notice it more in daily driving. Car does seem to be reacting quicker now to gas pedal presses and breaks 2nd gear traction very easily.
I will be installing S3 cooler + oettinger turbo outlet kit next, hopefully I can get the 80-120kmh time under 3s when these are finished.
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