970rwhp on Stock GE short block
Nice numbers and beautiful black SC
10-01-07, 11:10 PM
#35
Lexus Champion
So it's basically a GTE without the oil squirters and the GTE pistons? Where's the surprise?
You're also aware you will have rod bearing issues shortly, aren't you? You might want to datalog your oil pressure to shut down before it tosses the rod out the side. It is a common issue over 900 whp on stock internals. It's also why there are Clevite bearings for the 2JZ.
You're also aware you will have rod bearing issues shortly, aren't you? You might want to datalog your oil pressure to shut down before it tosses the rod out the side. It is a common issue over 900 whp on stock internals. It's also why there are Clevite bearings for the 2JZ.
While bearing material is a consideration the problem with bearings going out is either insufficient oil control or in this case at these power levels the rods simply getting pulled to hard and going out of round. Bearings are hydrostatic... IOW they run on a wedge of oil. The crankshaft is never supposed to actually touch the bearings.
Is the answer maybe better rods and or rod bolts?
Do the "clevite" bearings have better ability to withstand a slight touch without spinning (kind of like forged pistons tolerating a touch of detonation)? Are they a stronger steel base that creates a stronger rod big end? Ok, these are technical questions but at these power levels worth asking.
10-07-07, 10:32 PM
#37
Tech Info Resource
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I am going to take a guess at this suggestion.
While bearing material is a consideration the problem with bearings going out is either insufficient oil control or in this case at these power levels the rods simply getting pulled to hard and going out of round. Bearings are hydrostatic... IOW they run on a wedge of oil. The crankshaft is never supposed to actually touch the bearings.
Is the answer maybe better rods and or rod bolts?
Do the "clevite" bearings have better ability to withstand a slight touch without spinning (kind of like forged pistons tolerating a touch of detonation)? Are they a stronger steel base that creates a stronger rod big end? Ok, these are technical questions but at these power levels worth asking.
While bearing material is a consideration the problem with bearings going out is either insufficient oil control or in this case at these power levels the rods simply getting pulled to hard and going out of round. Bearings are hydrostatic... IOW they run on a wedge of oil. The crankshaft is never supposed to actually touch the bearings.
Is the answer maybe better rods and or rod bolts?
Do the "clevite" bearings have better ability to withstand a slight touch without spinning (kind of like forged pistons tolerating a touch of detonation)? Are they a stronger steel base that creates a stronger rod big end? Ok, these are technical questions but at these power levels worth asking.
10-07-07, 11:01 PM
#38
Thats bascially the issue, stock rods after 800-850rwhp usually bend (Like a pretzel); this is the only weak link in the 2jz-gte, that is exactly why people upgrade to the carrillo rods with sps carr rod bolt. (I learned this by being good friends with Paul Efantis and watching him swap a motor out in the MSP supra @ MIR when they bent a rod in one of there race engines).
The pistons are perfectly fine over 1000rwhp, heck I know of a supra owner in NC that made 1030+rwhp with Pauter Rods and stock pistons. Engine builders just go the extra step and slap in better rod bearings for like you said for higher cylinder pressure and oil control (Being the Clevite77, ACL or Power Enterprise) and some that plan to make even more power then the 1000rwhp go with Billet Main caps and 1/2" studs. All about personal preference and how "safe" you want your engine to be, but nothing is bulletproof.
The pistons are perfectly fine over 1000rwhp, heck I know of a supra owner in NC that made 1030+rwhp with Pauter Rods and stock pistons. Engine builders just go the extra step and slap in better rod bearings for like you said for higher cylinder pressure and oil control (Being the Clevite77, ACL or Power Enterprise) and some that plan to make even more power then the 1000rwhp go with Billet Main caps and 1/2" studs. All about personal preference and how "safe" you want your engine to be, but nothing is bulletproof.
11-16-07, 11:35 AM
#40
Racer
I saw that you are running an AEM ecu, but I was curious on what motor harness you are using? From what i've heard if you swap a gte head from a 2jzgte or 1jzgte you have to swap the electronics aswell? Did you use the stock GE harness with the aem? ty
Edit:: sorry for the old post bringup!
Edit:: sorry for the old post bringup!
11-17-07, 07:56 AM
#43
Lead Lap
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So the question again from me...have you taken it to the track or only to the dyno 50+ times? I love seeing high HP numbers from something like this but is it a dyno queen or a real driven car?
11-17-07, 12:36 PM
#45