08-31-2006, 01:46 PM
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#1 |
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Stock
Join Date: Feb 2006
Location: Where ever there is a Drag Track
Posts: 11
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damaged engine
my engine go tdamaged during testing, so looking for a new one, any help? it was bored to 3.3 already could i go 3.5 cause two pistons got damaged, the connecting rod broke during the run. i am desperate.
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1994 Supra MKIV 3.5" Ehxaust Chromed 75mm Turbo upgrade 88mm Engine Block Bore 200 shot nitros HKS Intercooler Fully Polished Engine Bay |
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09-01-2006, 12:39 PM
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#2 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
Regarding the bore #s you quoted, was that inches or Liters? I'd have to assume you're talking about liters, because a bore of 3.3" would be less than the oem bore size of 86mm=3.385827". If you are talking about liters, please note that an increase in bore alone can't take the 2jz-gte to 3.3L. Again, oem bore size is 86mm. 1st overbore is 86.5mm, and then max adviseable overbore 87mm. This is only a 1.2% increase, which means your new engine goes from 3L to 3.04L. I've heard that an 87.5mm or 88mm overbore is possible, but I've also heard of cracked cylinder walls, so personally I wouldn't recommend it. Even with an 88mm overbore (a 2.3% increase), you're still only looking at 3.07L. The only way to get to 3.3L or 3.4L is to install a stroker kit (but your profile doesn't mention stroker). Fwiw, I've never heard of 3.5L even with a stroker... Lastly, I can't help but comment that you must have been either spraying a hellacious amount of no2 (a 200 shot???), or spraying under 3k rpms (or both) to break a 2jz-gte connecting rod...be sure to tell your tuner that he needs to to retard the timing based on the size of the shot (for a 200 shot, you should be retarded by at least six to eight degrees from a conservative boost-only curve), and to never spray under 3k rpms*. If you're spraying that 200 shot all at once, consider installing a progressive controller...it's harder on the solenoids, but much easier on the engine... *Note that a very small shot (eg 50-shot), or a progressive shot can be safely sprayed at 2500-2800 rpms, if properly tuned, but the general rule for a straight shot in a 2jz-gte, with anything even in the ballpark of an oem timing curve, is no no2 under 3k.
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Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. Last edited by pwpanas; 09-01-2006 at 01:06 PM. |
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09-04-2006, 02:09 PM
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#3 |
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Stock
Join Date: Feb 2006
Location: Where ever there is a Drag Track
Posts: 11
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thanks for the advise M8, it will be well taken, and sorry the block is bored to 88mm,
__________________
1994 Supra MKIV 3.5" Ehxaust Chromed 75mm Turbo upgrade 88mm Engine Block Bore 200 shot nitros HKS Intercooler Fully Polished Engine Bay |
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09-05-2006, 04:03 PM
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#4 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
...and (fwiw) I'm still confused ... when you said "it was bored to 3.3 already could i go 3.5", were you talking inches or liters?
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. Last edited by pwpanas; 09-05-2006 at 04:06 PM. |
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09-05-2006, 04:18 PM
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#5 |
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Stock
Join Date: Sep 2006
Location: Boise Id
Posts: 16
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He said that it was bored to a 3.3, that is .3 larger bore than stock.
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09-05-2006, 04:20 PM
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#6 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
.3 inches larger diameter bore? or .3 total liters larger bore? or .3 mm larger bore?
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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09-05-2006, 04:21 PM
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#7 |
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Stock
Join Date: Sep 2006
Location: Boise Id
Posts: 16
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Hey, where it says stock under my name, how do i change that???
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09-05-2006, 04:22 PM
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#8 |
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Stock
Join Date: Sep 2006
Location: Boise Id
Posts: 16
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Im am assuming 3.3 liters instead of the original 3.0 liters
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09-05-2006, 04:23 PM
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#9 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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09-05-2006, 04:24 PM
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#10 |
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Stock
Join Date: Feb 2006
Location: Where ever there is a Drag Track
Posts: 11
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yep 3.3 liters larger than stock size of 3.0 liters. (M8 - mate)
__________________
1994 Supra MKIV 3.5" Ehxaust Chromed 75mm Turbo upgrade 88mm Engine Block Bore 200 shot nitros HKS Intercooler Fully Polished Engine Bay |
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