Bretton just gave me a clue to why my 4Y is underpowered
Yes you are correct the 'Brospeed' type cam mod does reduce the low end torque a bit, basically it seems to shift the power band up the rev range a bit, the advantage is more power at higher revs, 3500rpm to 5000rpm, but again who really uses this rev range in normal offroad driving, the low end torque is better to have for normal overlanding, but the guys who are into challenges and obsticles like to extra power at the top. I feel that jetting of the carb(if you don't have EFI) should be altered/checked via a dyno session after the cam is changed, also check the timing, the warmer cam changes the iginition timing point, my is now at 10deg and happy, standard 4Y has a book timing of 4deg... opinions vary.
When the cam was converted it did go well,but then from there I had it serviced a couple of times and my mechanic would have set the timing to the standard.I will talk to him and advance the timing.I do not like the dyno.Was there when they did it and the hair on your back stands up when they rev the motor like that.
Is it just the timimg you need to adjust or is there something else?
"The World is a book, and those who do not travel read only a page.-Saint Augustine"
Hope all is well.
.The other cause could be that I have the so called Botswana spec Hilux (Surf D/C) and maybe this body was not design for a 4y.The next step will be to try another 4Y and see if there is a difference.
