daffy wrote:hey there. i'm new here too. i posted an almost identical post to yours a few days ago. if you scroll down you'll see it. subject 75hp to 100hp.
check the back of your car. if you have a 1,4 badge then you have the 75hp model. if there is a 16v badge then you have the 100hp model. also, if you have the 75hp model then you'll have the redline before the 6000rpm mark.
from what i gather the 75hp is indeed a de-tuned version in that at least the cams and ecu are different. i haven't been getting any specific answers as to where the differences are so i'm planning on going to vw to ask them exactly where the differnces are. it's obvious that it can me significantly increased because the same engine (as i state in the post) is used in the fabia and the ibiza with almost 40hp more.
You ever driven the afore mentioned fabia? I had one in greece last year and it wouldn't go. It was like driving with three fat people on board. It seems that the figures quoted need to be taken with a pinch of salt. I have driven Fiats with about 50hp and they go like stink... It all depends on the way the power band is distributed.
You will find that the 100Hp 16V unit has higher lift, slightly higher red line, but the same compression ratio. I found that if you drive the 100Hp with the A/C on, you are very pushed to notice the difference with the 75hp model. I think given rising fuel prices, insurance premiums etc, that the 75hp model is an excellent compramize, and that is why it exists, to meet that market. I don't find that less than 75hp is that pleasurable to drive. You should also find that the 75Hp suffers far less wear in the long term too, which is what people who buy VW expect.
Don't waste your time with performance exhausts, you wouldn't believe how much work has gone in to developing the standard exhaust, if you reduce the back pressure, you will significantly affect the torque and thus the drivability of the car. In terms of improving the 75Hp model, I would concentrate my efforts at the breathing end of the engine, if you cool the charge you will significantly improve the output, at all speeds. - altering the flow will not always give you an improvement, the way the induction is designed is very complex, again for reduced pumping losses, torque and emissions.
You can always chip the 75hp model as well, giving a claimed 8bhp improvement, but the curves at certain rpm are actually worse, than the standard engine, it has been seen that using 97 Octane fuel is actually better, but the 10% markup isn't met with +10% performance.
There is however, a way to get 0 - 60 in about 6 seconds...
