Ambrose7 Posted June 14, 2004 Share Posted June 14, 2004 Hi guys, it seems ive got problems with my second turbo on my j spec , when driving the first turbo comes in fine, no problems there, but the 2nd turbo seems to be coming in later and later, when i first bought the car last nov the 2nd turbo came in about 3, 3.5k. then a few months ago it started to coming in around 4k, driving to work today there was a few times when it didnt come in till 5k!! and i almost got beaten in a drag race up a hill the other day by a 2ltr beatle what are the rev ranges that the turbos are ment to come in? ive never owned a turbo car before so im not sure what this is a sign off, and my knowledge of turbos is zero, so any help or advice would be most helpful. thankyou. Link to comment Share on other sites More sharing options...
Sherriff Posted June 14, 2004 Share Posted June 14, 2004 Not being an authority on all things Turbo I can't provide the exact data you need but from my own J spec TT the 1st Turbo comes in at about 2k revs and the second one comes on strong at about 4k. There's a bit of a lull at about 3.5k (seems to be the crossover point) which as I understand it is related to the opening of various valves and things to spin up the second blower for it to do it's full boost thing at 4k. Cheers, Sherriff. Link to comment Share on other sites More sharing options...
Ambrose7 Posted June 14, 2004 Author Share Posted June 14, 2004 thanks for the reply m8, maybe mines not so wrong after all then if its ment to kick in at 4k Link to comment Share on other sites More sharing options...
Ian C Posted June 14, 2004 Share Posted June 14, 2004 It's meant to prespool at about 3500rpm, hence the slight dip in power, and then come on song at 4000rpm. Definitely at full boost by 4500rpm. Anything later and it's check-for-split-vacuum-hoses time -Ian Link to comment Share on other sites More sharing options...
Paul Laing Posted June 15, 2004 Share Posted June 15, 2004 My 1st turbo is on way before 2k, seems like from 1k, and my 2nd turbo comes online at just under 4k, i thought the UK ones were different but it seems like the jap 2nd turbo comes online at the same time Link to comment Share on other sites More sharing options...
SKI Posted August 4, 2004 Share Posted August 4, 2004 Is there a difference in the spoil up RPM between JSpec and UK, I'm running a UK spec. I've had a few problems with the spoil up time on mine, the second turbo seems to come on at around 4KRPM with full boost at about 4.5KRPM, wondered if this sounded about right for a UK car. Link to comment Share on other sites More sharing options...
Sherriff Posted August 4, 2004 Share Posted August 4, 2004 Ski, I think IanC has answered this question just a couple of posts up... It's meant to prespool at about 3500rpm, hence the slight dip in power, and then come on song at 4000rpm. Definitely at full boost by 4500rpm. Anything later and it's check-for-split-vacuum-hoses time. Cheers, Sherriff. Link to comment Share on other sites More sharing options...
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