I had the same thought until I remembered that essentially every Japanese car and a whole bunch of Ferraris drive their camshafts the same way. Do we need to think about belt drive oil pumps any differently?
Alan,
A lot of overhead cam cars use a belt drive system as you mentioned. It works great.
If you look at their service manuals though, the belts are suppose to be replaced frequently because if they fail, the valves can kiss the pistons and cause major damage, especially at high RPM's.
I worked at a car dealership for 12 years and changed many timing belts for overhead cam cars at their service intervals. The belts I removed looked fine. No cracks or much visible wear at all.
Then I would get a car in for service with over 130k miles to get timing belt changed. That is over double the service life of the belt and it still looked fine.
My point is, the manufacturers know the damage a timing/cam belt failure can cause in an engine so they suggest you change it out frequently, especially if you are under their warranty and they have to pay out.
That is why I mentioned the oil accumulator as added insurance. Then if the oil pump belt ever fails and I lost pump pressure, I could have it trigger a red warning light on the dash while the oil accumulator maintains oil pressure until I react to the light, bring the RPM's down and shut down the motor. I will just keep an eye on the tension and change the belt out frequently.
If you pull that engine you can get it over 1000hp with little effort and be able to take it in for service just about anywhere.
Besides NOTHTING SOUNDS LIKE A 12!!!!
YouTube - Pagani Zonda F Roadster sound - 5 minutes of full throttle!!
Hey Adrian,
I was just joking bro, that is my quiet "date night" car. Got to leave one of my cars stock. I would not let
anyone service any of my cars anyway. I'm way too damn picky.
My mother used to tell me 20 years ago when I lived at home, " you are so picky with everything, you will never find a girl that can please you and get married " She was right, I'm still single :laugh:
You are absolutely right though, the V12 TT can be tweaked with little effort. They are way detuned and whisper quiet with full factory exhaust that robs them of about 120hp.
That Zonda sounds cool as hell !! Especially echoing in that building. It sounds like a high pitch screaming Cheetah.
Check out the vid below of some FXX's.
YouTube - Ferrari FXX Evoluzione Sound!!
There is no way those people in that vid will be able to stand that close to my 962 when it's revving that high without earplugs. This motor with the BIG solid roller cam revving won't be high pitched like those baaad boys. Your tweeters get a good workout from the Zonda Vids. Get your mid ranges and subwoofers ready for revving with this motor :veryangry:.
I will tell you this, for a fraction of the price of those cars, mine will look cooler, beat them on their own track and have a higher top speed.
I know I have some
BIG shoes to fill but I have been waiting for a long time for a challenge and project like this.
When I'm finished with this thing, I'm going to contact Jay Leno, send him a detailed build package on the car and see if he want's to take it for a test drive. I know he has a lot of seat time in exotic cars for a good review on it. Then ,if he want's one to add to his collection, I have one more identical Dart billet block I can build him a clone.
:thumbsup:
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Found some of Jeff's pics. Looks like he is actually selling his car. Anyway, here is the automotive porn.

I have ridden in this car and it was awesome when it was a N/A LS6. Can't imagine what it is like as a TT LS2 now... But as you can see he fit an A2A in there with a cooling fan. The car gets driven all over and won the 0-200-0 Silverstate Challenge last year with this set-up.
Tony,
Jeff has one BAD A$$ car. I have watched a lot of his vids on Youtube. That is where I want to mount my inter-cooler as there will be a scoop on top of the car forcing air through it. I have some different plans for turbo location though. I am really keen on keeping a cool running motor and a well ventilated engine compartment on this car. Insulation ,component placement and heat extraction are critical. HP generates heat exponentially, that is a fact.
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Guy's,
This is what I want to build below. The only difference is, I would have 800HP more, have A/C and while everybody is loading their race car in their trailer that I just smoked ,I just jump in my 962X kick the A/C on and drive home !! :thumbsup: