Originally Posted by
scoooby slayer
the gt42 was even laggier than that graph suggests on the road wasnt it ? the dyno runs alot more load than in car doesnt it rod ?
will the new engine be on this same dyno with the 9180 before its fitted in the car again ?
Thats correct the bigger the Turbo the harder work it is to keep it on the sweet spot. I got to grips with it in the end but obviously 800 is not going to be as easy to drive as 500. The biggest improvement to my car would be a 4.1 diff it would make 5th into 4th etc & so much easier to drive. It would however drop the Topspeed from 217mph down to high 190's. I search ebay on a weekly basis as Jag did do that ratio but im told its hens teeth & diamond expensive but it may turn up.