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Punto (Mk1) Punto Mk1 1368 Fire Rotrex Supercharged!
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Punto (Mk1) Punto Mk1 1368 Fire Rotrex Supercharged!
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i think it unfair to blame the rods he says he gave it some so there is a possibility the bearing gave before the rod looking at that picture due to localised heat build up
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Who cares! The rod snapped when it was asked to deliver. It went while "Giving it some" so plainly not strong enough.
Its impossible to know exactly why it failed. But expecting critical parts to handle double the power they were designed for is likely to end in tears. In the old days parts were often over engineered. Today they are good enough, but have less margin of load/safety.
Oil or bearing failure is less likely because modern bearings are built to high tolerances and they suffer less at high revs than the rods themselves. Crank bearings are more at risk when slogging at low revs when point loading is the highest and oil pump is turning the slowest.
If the cost of strong rods is too much, take the risk but be prepared with plumbed in fire extinguishers.
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they still use white metal in the bearings and of course quality oil
look at the picture you put up of the hole in the engine block and it looks like the conrod has ripped out of the bolt holes now in all the engines ive blown and ive done a few in my time this always happened due to the oil pressure worn bearings or just trying to give everything too much
you really have to know where to stop and use mechanical judgement before you rip it to bits
this is not a put down of the lad whos car burnt out by the weay as i truly feel sorry for him but you must have limits or limiters to stay within the realms of not destroying things
I keep it always in mind, this is way I'm not obsessed with top power output!
Low revs, low boost should be less negative to the durability of the engine, thus the rotrex has a less brutal charging effect being more linear then a turbo.
By the way, I can't say I'm not gambling as any other. We didn't re-engineered this engine, we just bolted on a blower.
Am using 5/40 fully syth!!! Whaich oil are you using ?
P.S am reuly gutted about Munkul's car!
ming
?P.S am reuly gutted about Munkul's car!
ming
Am using 5/40 fully syth!!! Whaich oil are you using
Me? Nowt. I've not run the engine yet!
You could try something else until it stops. But are you 100% sure that it is the tappets? I'm not sure what ECU you're running, or whether it has been mapped..........
The Selenia Abarth is a 10W50, previously i had better feeling with the Mobil X-one that was a 5W50. For the tappets, it only shows at cold starting, when the engine is warmed no tapping at all, could be only a drain issue?
BTW the ECU it's an Haltech, Australian product. Entry level for sure, but is a very nice product with a easy-to-go tuning software. The map right now is just a testing one, ignition is the same from the Uno Turbo as I said and injection was made on lambda target. If I had the deadtimes from my injectors, I would have switch to volumetric efficiency as tuning strategy, right now I'm on speed/density.
BTW the ECU it's an Haltech, Australian product. Entry level for sure, but is a very nice product with a easy-to-go tuning software. The map right now is just a testing one, ignition is the same from the Uno Turbo as I said and injection was made on lambda target. If I had the deadtimes from my injectors, I would have switch to volumetric efficiency as tuning strategy, right now I'm on speed/density.
found this thread really interesting, i love the dials/instrument panel, doesnt it blind you at night?
not at all with the right backlight settings
Guys, is there someone who can certainly says what connection rods are fitted in the TJet? I mean iron or steel? Quite sure they are made from sintered iron, but someone is telling me that also steel rods could be sintered and not only casted!
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I think the only way you'll find a truth you can believe is to send some off to Carrillo, Arrow, etc. (or maybe pop into Bologna and buy someone at Ducati a big lunch)!
In public, FIAT are going to give you lots of re-assurance, and Abarth are not going to be as free with info as you'd like.
The nodular iron stuff has been around a long time -- it's common in MOPAR engines -- even top end ones. Porsche have been using sintered rods for about 20 years, but whether they've actually used some on a race car, I have no idea. It's said that Honda have played with sintered rods with carbon fibre cores to improve tensile strength (rods always seem to break in tension), but I don't know how far these got.
Talk of split cast rods scares just about everyone in the performance industry.
Forged H beam or machined from billet is the way to go: Titanium raises its own set of problems.
[aside]I tried to edit the post to add this, but the forum engine conked out. [/aside]
The T Jet cranks are said to be different, too, but whether in material/design/machining or some combination, no-one is telling.
The T Jet cranks are said to be different, too, but whether in material/design/machining or some combination, no-one is telling.
