Post by damon80 on Apr 21, 2014 1:57:11 GMT
Very busy weekend this weekend... Sadly not bike related 
Serviced mine and my lady wife's cars (mines an Astra Convertible 2.0 Turbo, hers is a Vectra 2.0 Turbo - but her Vectra has a Saab- derived engine, less power overall (210bhp vs 175bhp) and the turbo on the Vectra is mounted at the back of the engine.
After taking the advice of a mechanic mate of mine, I took the old air box out and fitted a free-flow air filter (£25, bargain). I then set about remapping her on my laptop (bought the diagnostic port plugin of ebay for about £10 delivered, and installed the remapping software on it that I "acquired").
It's taken the bulk of the weekend, but I think that my Astra is sorted now. After some fiddling and a couple of motorway blasts, running Tesco Momentum 99 (99 being the Octane rating), she went like a stabbed rat. But, on the fuel computer, she was doing 16mpg. Plus the turbo was only kicking in at 5k rpm. But when it kicked in - by Jesus, she was rapid.
Ive now turned the boost down a bit, so it kicks in at 4k, and delayed the solenoid-controlled waste gate a bit. With that change, she's now doing about 25mpg on the comp. But I think I'll book her in for a proper rolling-road session soon to sort her properly. But as the current map stands, I reckon she's pulling an easy 240bhp.
My point is this - when I were a nipper, to get more go - it was either new twin Weber carbs, a K&N Filter, and some new cams shoved in. Now, a chap who is a bit shy of ripping a decent cylinder head apart but is handy with a laptop, can reprogrammed the thing to silly power. God bless IT
Serviced mine and my lady wife's cars (mines an Astra Convertible 2.0 Turbo, hers is a Vectra 2.0 Turbo - but her Vectra has a Saab- derived engine, less power overall (210bhp vs 175bhp) and the turbo on the Vectra is mounted at the back of the engine.
After taking the advice of a mechanic mate of mine, I took the old air box out and fitted a free-flow air filter (£25, bargain). I then set about remapping her on my laptop (bought the diagnostic port plugin of ebay for about £10 delivered, and installed the remapping software on it that I "acquired").
It's taken the bulk of the weekend, but I think that my Astra is sorted now. After some fiddling and a couple of motorway blasts, running Tesco Momentum 99 (99 being the Octane rating), she went like a stabbed rat. But, on the fuel computer, she was doing 16mpg. Plus the turbo was only kicking in at 5k rpm. But when it kicked in - by Jesus, she was rapid.
Ive now turned the boost down a bit, so it kicks in at 4k, and delayed the solenoid-controlled waste gate a bit. With that change, she's now doing about 25mpg on the comp. But I think I'll book her in for a proper rolling-road session soon to sort her properly. But as the current map stands, I reckon she's pulling an easy 240bhp.
My point is this - when I were a nipper, to get more go - it was either new twin Weber carbs, a K&N Filter, and some new cams shoved in. Now, a chap who is a bit shy of ripping a decent cylinder head apart but is handy with a laptop, can reprogrammed the thing to silly power. God bless IT
