how high can a L92 spin
07-08-2010, 02:57 AM
#11
Formerly darynC-10/23/10
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nope i thought very hard about pulling the motor apart for new cam bearings, balanced rotating assembly, new rings, new main bearings. all wasted money to the average man, but when you want something to last its worth the few lil new parts added to make it last.
ive seen stock 4.8s turn 6800 theyre crazy but who knows.
im honestly waiting to hear 5900-6000 bc the "truck intake stops pulling past that" which i have a dyno graph that shows my truck flat lines at 6500 and never drops a single rpm to 7000.
ive seen stock 4.8s turn 6800 theyre crazy but who knows.
im honestly waiting to hear 5900-6000 bc the "truck intake stops pulling past that" which i have a dyno graph that shows my truck flat lines at 6500 and never drops a single rpm to 7000.
have you sen my dyno graph? mine also flat lined at 6000 or something and didnt drop
07-08-2010, 08:40 AM
#17
if your power stops at 6500 I'd shift it at about 67-6800. I wouldnt worry about failure at all. my 4.8 spins to 7K on occasion with 120K miles on it, BONE STOCK LOL. plenty of people shift theirs at 7500ish without a problem. Id say do it according to power, dont worry about parts breaking, they arent going to 
07-08-2010, 11:05 AM
#18
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if your power stops at 6500 I'd shift it at about 67-6800. I wouldnt worry about failure at all. my 4.8 spins to 7K on occasion with 120K miles on it, BONE STOCK LOL. plenty of people shift theirs at 7500ish without a problem. Id say do it according to power, dont worry about parts breaking, they arent going to
that was with my old 100k ls1 though
07-08-2010, 11:26 AM
#19
7500ish forget that! lmfao
i shift at 6800 but im looking for that extra second of 2nd gear. (i have a 1 peice driveshaft and i DO NOT TRUST IT) im wanting to up just my 2-3 to 7k and put it on the track to see the difference, then up it to 7200. if i see no mph/e.t difference then ill go back to either 6800 or 7000.
yeah the power flat lines at 6500 but im not willing to run a 3600 converter so we put the shifts higher to help the little 3200 around lol. i will be upgrading to a 3400 so im sure itll be even better
i shift at 6800 but im looking for that extra second of 2nd gear. (i have a 1 peice driveshaft and i DO NOT TRUST IT) im wanting to up just my 2-3 to 7k and put it on the track to see the difference, then up it to 7200. if i see no mph/e.t difference then ill go back to either 6800 or 7000.
yeah the power flat lines at 6500 but im not willing to run a 3600 converter so we put the shifts higher to help the little 3200 around lol. i will be upgrading to a 3400 so im sure itll be even better
07-09-2010, 10:59 AM
#20
I would think the only limiting factor is your valve train and how it's put together, springs, lifters, rockers, push rods, valves, etc...
I don't see the rotating assembly having any problems holding together up to +8K rpm's or more. First thing that's gonna happen IMO is your gonna eat a valve because you have the wrong springs in there, that would be the first casualty I would think. Some race LS motors are spinning to just south of 10K rpm's.
I don't see the rotating assembly having any problems holding together up to +8K rpm's or more. First thing that's gonna happen IMO is your gonna eat a valve because you have the wrong springs in there, that would be the first casualty I would think. Some race LS motors are spinning to just south of 10K rpm's.