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Forced Induction Turbochargers and Superchargers..Got Boost?

Turbo bottom End weak link

Old Oct 14, 2006 | 03:57 PM
  #21  
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Originally Posted by barthelb
I think i have one of the longest boosted engines on a stock block. I currently have 62000 miles, my car was boosted at 28k. I've made 400whp or more the whole time.
My reason for why its lasted is one the tune, two my regular 2500-3k oil changes and monitoring oil level, consistent mix of about 4+ gal 100oct every fill-up, and my Z32 Oil cooler.
A nice mixture of quality fuel always helps with excellent tuning that is for sure.

M
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Old Oct 15, 2006 | 08:50 AM
  #22  
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MRC, weak rod bolts result in rod stretch....then you can guess what happens after that.

Like I said...only one reported instance that I can recall of a rev-up motor failing....and that probably had more to do with tuning, that with anything else.
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Old Oct 15, 2006 | 01:49 PM
  #23  
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Originally Posted by Sharif@Forged
MRC, weak rod bolts result in rod stretch....then you can guess what happens after that.

Like I said...only one reported instance that I can recall of a rev-up motor failing....and that probably had more to do with tuning, that with anything else.
I know this, I even stated it in my last post, your not telling me something I dont know for about 15 years already You act as if you know everything sometimes...What Im saying is the rods I have seen fail, did not fail due to rod stretch, and the resulting contact of the piston VS valve..In this cast the valve would bend far before a rod would snap..The rods I have seen bent or snapped are as a result of structual fatigue or detonation..In some cases the rods even caused the crank to bend, I have seen this on Paranormal's motor twice...
The bottom line Im trying to say is just because you say so does not make it 100% applicable all of the time..In my opinion the rev up rods are no stronger as a result of rod end bolts, the only thing this allows the rev up motor to do safely is rev to 7300 rpms N/A....This is not 100% proof that the rev up rods are that much stronger than non rev ups just cause Sharif says so..
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Old Oct 15, 2006 | 03:27 PM
  #24  
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Originally Posted by MRC Motorsports
I know this, I even stated it in my last post, your not telling me something I dont know for about 15 years already You act as if you know everything sometimes...What Im saying is the rods I have seen fail, did not fail due to rod stretch, and the resulting contact of the piston VS valve..In this cast the valve would bend far before a rod would snap..The rods I have seen bent or snapped are as a result of structual fatigue or detonation..In some cases the rods even caused the crank to bend, I have seen this on Paranormal's motor twice...
The bottom line Im trying to say is just because you say so does not make it 100% applicable all of the time..In my opinion the rev up rods are no stronger as a result of rod end bolts, the only thing this allows the rev up motor to do safely is rev to 7300 rpms N/A....This is not 100% proof that the rev up rods are that much stronger than non rev ups just cause Sharif says so..
Wow...a bit touchy today? Take a deep breath man, its gonna be alright.
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Old Oct 15, 2006 | 03:34 PM
  #25  
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Originally Posted by 350zDCalb
Wow...a bit touchy today? Take a deep breath man, its gonna be alright.
Not touchy man, just tired of Sharif trying to discredit my knowledge and act like he knows everything be it intentional or unintentional...He often has a round about way of touching a nerve with me, dont know why..You said it yourself that the rods in the two motors are very similar. AndI said exactly what Sharif said about the rod bolts helping with rod end failure and rod stretch, however this does nothing to strengthen the actual rod structure itself. It simply allows for strenght when it comes to the increased stress on the big end with increased RPM's..
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Old Oct 15, 2006 | 04:05 PM
  #26  
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MRC, you are being extremely over-sensative. When I made my original comments, I was clear to point out, that my statement was conjecture and speculation.

I had no intention of discrediting your knowledge. I actually agreed with what you are saying....not sure where that came from.

My point was simple (and it is admittedly still speculation), is that the improved rod bolts in the rev up engines, APPEAR to result in less bottom end engine failure. Whether the rod bolt, or the rod strength is the cause is immaterial to the discussion. I just havent seen many rev-up engine failures.

Can you, or anyone else, point is to another rev-up engine (besides paranormal's)that has failed in this manner?

Last edited by Sharif@Forged; Oct 15, 2006 at 04:08 PM.
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Old Oct 15, 2006 | 06:12 PM
  #27  
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Ohhhhhh Snap !!! Look at the carnage I have caused!

Sharif.... don't take this out on my car! Promise?? My bill just got a whole lot bigger!!

JET
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Old Oct 16, 2006 | 02:09 PM
  #28  
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My friend has a revup '05 G35 out here in Cali and his engine snapped a rod and threw it through the block with his APS TT. Not sure if it had anything to do with the strength of the rod as it could have been an issue not caused by stress. Not enough engines to make an educated guess. My belief is gas and oil are probably the biggest contributors to engine failures besides having a good foundation which is the tune. Not having a good high octane gas for insurance and proper oil level and or frequent enough changes. Two cents worth.
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Old Oct 16, 2006 | 06:38 PM
  #29  
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Julian..when the motors you mentioned came apart the big end of the rod was still connected to the crank?
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Old Oct 16, 2006 | 07:31 PM
  #30  
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Originally Posted by MRC Motorsports
despite crashing the car 3 days after getting it back..
..
that kids needs a ****ing bus pass
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Old Oct 17, 2006 | 07:44 AM
  #31  
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Originally Posted by HeadGames
Julian..when the motors you mentioned came apart the big end of the rod was still connected to the crank?
yup...
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Old Oct 17, 2006 | 09:48 AM
  #32  
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lets not forget about my rods!
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Old Oct 17, 2006 | 09:06 PM
  #33  
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back when I got my rev-up tuned by SP, it was holding 13psi peak boost. Had that for about 5000 miles with no problems...albeit it was on full 100 octane fuel. When my block was torn apart recently, the rods didn't show too much stress either.
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