Evo Gt640 or Evo GT750
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Originally posted by aj996tt
Stephen, Todd and Alex, feel free to advise- how much hp (crank/4whp/2whp) can stock internals reliably hold on 91,93/94 and 100 octane fuel?
Stephen, Todd and Alex, feel free to advise- how much hp (crank/4whp/2whp) can stock internals reliably hold on 91,93/94 and 100 octane fuel?
Last edited by cjv; Apr 24, 2005 at 05:26 PM.
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Make sure everyone is clear. We are suggesting two different things. Rod bolt faliure is not a bent rod. that is when the bolt stretches and the bearing ovals. This will cause the bearing to fail and when it does it throws a rod.
At the levels Chad mentions your rods will actually bend. Both create a problem and maybe a hole in the case
At the levels Chad mentions your rods will actually bend. Both create a problem and maybe a hole in the case
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hi guys i dont know who opend this thread it was long time ago since i posted it , anyway i just want to tell you i went ahead and got the GT800 believe me guys the car is really fast my top speed was 347 km/h to be exact and i let go because in bahrain we dont have long highways i'm sure my 1/4 mile would be some where in the high 10s cause i have lightend my car a lot and raced a high second vette and beated him hopefully soon i will post my 1/4 mile slip , i have one thing to say to all porsche owners if you guys had a spare money trust me get the GT 800 package it worth every penny and its really reliable it feels like a stock porsche but except for the high exhaust tone and the clutch noise i drive the car 3 times a week and beat the **** out of it and so far its excellent its much better than my old up-grade when i used to have the stage 5 from evo which they disscountinued i had a lot of problem with that set-up especially the external wastegates .and the car was too laggy .
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Originally posted by PorschePhd
The motors we have built at 600HP at the crank start to show bearing shadowing at about 18-20K miles. The rods are not bending here, but the failure of the rod bolt is evident. Keep in mind that usage, constant RPM band and over revving all will accelerate that issue. Overall the bearings have looked good and just show signs. I have yet to see one fail all together.
The motors we have built at 600HP at the crank start to show bearing shadowing at about 18-20K miles. The rods are not bending here, but the failure of the rod bolt is evident. Keep in mind that usage, constant RPM band and over revving all will accelerate that issue. Overall the bearings have looked good and just show signs. I have yet to see one fail all together.
Originally posted by PorschePhd
In your case keep the oil changed regularly and look for material in it. Send it out if you would like to have it analyzed. If you start to see more bearing content then make appropriate plans.Typically your oil pressure also becomes an issue on the top end.
In your case keep the oil changed regularly and look for material in it. Send it out if you would like to have it analyzed. If you start to see more bearing content then make appropriate plans.Typically your oil pressure also becomes an issue on the top end.
thanks
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Originally posted by ebaker
When you pull the rods out of these 600HP 20K mile motors are the rod big ends out of round? Are the bearing clearances out of spec?
What wear metals would be mainly elevated from excessive rod bearing wear? Lead and tin?
thanks
When you pull the rods out of these 600HP 20K mile motors are the rod big ends out of round? Are the bearing clearances out of spec?
What wear metals would be mainly elevated from excessive rod bearing wear? Lead and tin?
thanks
If you have your oil analyzed on a consistent basis, you will be aware of the bearing wear as it was occuring.
Last edited by cjv; Apr 24, 2005 at 10:32 PM.
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Bahrain996TT
Yes somehow the thread has diverted a bit...I am glad to read that your car is now running great. So I guess you will be at the April 29th event?
I will be looking forward to do some runs with you with my 600+ old 993TT I have still never driven it since it was modded, the F1 track will be the testing ground. You have a great looking car BTW.
Hope to see you there.
Yes somehow the thread has diverted a bit...I am glad to read that your car is now running great. So I guess you will be at the April 29th event?
I will be looking forward to do some runs with you with my 600+ old 993TT I have still never driven it since it was modded, the F1 track will be the testing ground. You have a great looking car BTW.
Hope to see you there.
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