|
|
Post by lowtechguy on Mar 8, 2007 16:07:18 GMT
If 1242cc pistons are used with a 1368cc crank in a 1242cc block what would the CC be and would this be more or less stable than a standard 1368 as the block would be thicker between cylinders?
|
|
|
|
Post by babaracus on Mar 12, 2007 21:09:24 GMT
MY goodness what a question, too technical for me i'm afriad.
I would say 1242, but that would be a guess!
Fire it at oldschool!
|
|
|
|
Post by oldschool on Mar 13, 2007 10:23:18 GMT
MY goodness what a question, too technical for me i'm afriad. I would say 1242, but that would be a guess! Fire it at oldschool! Fire it at me or FIRE it at me?  1368 crank with 1242 pistons would make it 1323cc and getting it even closer to a steam engine design. |
|
|
|
Post by lowtechguy on Mar 13, 2007 10:25:45 GMT
Larger bore and shorter stroke being what we want, not the other way round... Is that what you're trying to say?
|
|
|
|
Post by oldschool on Mar 13, 2007 10:44:06 GMT
You got it, son!
|
|
|
|
Post by lowtechguy on Mar 13, 2007 11:02:08 GMT
I know you are old enough but dont be cheeky! |
|
james
New Member
Posts: 2
|
Post by james on Mar 14, 2007 12:08:16 GMT
1323cc, so what effect would this have on the power output and drivability? Would this take it closer to a race engine principal, how would it rev and where would the power band go? Would compression remain the same? Could the stock injectors take up the slack?
It would be a very easy modification and I doubt the cost new from FIAT would be all that expensive, under £400?
Why didnt fiat do this to start with? Instead of the 1368? There must be a flaw in it somewhere.
Regards
James
|
|
|
|
Post by lowtechguy on Mar 14, 2007 12:40:37 GMT
Hiya James, People talk of square engines like the 1108 were the bore and stroke are equal (meaning it can rev well), the stroke being shorter means it can rev VERY well like in f1. My silly suggestion is the oppersite meaning it will rev badly compaired to the above, the 1242 is already a long stroke as is the 1368, using the smaller pistons will just make it worse. Also the larger bore is what fiat can get the most out of the engine (not forgetting they are required to leave space for it to be honed etc so there will be a piston set available from fiat upto 0.5mm larger normally). Its a silly idea, and tbh I am embarressed I said it out loud  |
|
|
|
Post by oldschool on Mar 20, 2007 15:46:11 GMT
It is not as bad as you might think. The engine would be very torquey. But it couldn't rev as high as the 1368s or the 1242s do.
|
|
|
|
Post by lowtechguy on Mar 20, 2007 17:14:06 GMT
it is silly, I dont like diesel power curves.
|
|
|
|
Post by oldschool on Mar 20, 2007 17:44:26 GMT
it is silly, I dont like diesel power curves. Yes, you do!  |
|
|
|
Post by lowtechguy on Mar 21, 2007 9:42:06 GMT
I was reading about the gallardo last night and that has a 80ish mm bore and a 90ish mm stroke?
I suppose its different being a V engine though
|
|
|
|
Post by oldschool on Mar 21, 2007 14:04:20 GMT
Still not as bad as 72mm bore/84mm stroke.
|
|
|
|
Post by lowtechguy on Mar 21, 2007 14:56:28 GMT
Still not as bad as 72mm bore/84mm stroke. Bore × stroke, 82.50mm × 92.80mm so 2mm less stroke deficite from my suggestion  |
|
|
|
Post by lowtechguy on Mar 21, 2007 15:19:24 GMT
|
|
