Dan, I've an R myself and I'm very kind to it, but I do track days with some other R26/R26.R owners running stage 1 and stage 2 who absolutely leather the absolute shite out of them and their still going strong one of which have done over 50 track days, they are also used as ring rental cars at the ring by RSR, can't be that bad dan cheers Steve
Weakest link in the engine are the rods, which hold about 300 safely and than the piston ring lands which should hold 320 HP but that is pushing the luck.Orherwise it is very good engine!
I'm not thinking of changing mine in anyway. Just wondered if they were any good. I plan you do the odd track day in mine, but its never taken over 5,500-6,000 revs. Thanks for all the replies..
Sokol is correct, the ring lands are normally what let go piston wise.. bad mapping / Det can break them, if you're really unlucky they could have a casting fault which rears it's head when more heat / power is produced. The rods seem 'good' for around 300~ ft.lb anymore and you are asking for trouble! They are ok to rev, 7.8K RPM is no problem on an F4R
You can still rev the car higher RPM, but its the turbo which runs out of puff. Below is a graph of my car running a hybrid TD04, which makes peak at 6k RPM:
Not a case of enlarged inlet manifold and cams then? Whats with the weird blip at 3400rpm, do these cars run variable valve timing?
Only people going 500bhp+ have changed the inlet manifold. That's where the car rises up on rollers I think, so it plots the 'jump'.
Well seen as it's not been used the last year (as you already know) then about 12 miles. It ran three years previously stg2 including three fast out blasts to lemans and back and various trackdays fine.
