Guys who deleted Balance Shafts...
#1
Three Wheelin'
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Guys who deleted Balance Shafts...
How did you tap for the turbo oil feed? In stock configuration, the oil feed runs through the balance shaft bearing and then into the turbo. Without the shaft in place, what are you guys doing?
#2
Three Wheelin'
I just left the balance shaft stuff in place but didnt run the belt.. but i guess you could just tap the block and screw in an AN fitting with a crush washer.
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There's a slight vibration at around 3000rpm. It's not noticable unless you have loose stuff in the car. In my case, my shiftknob was missing a clip and the buzzing sound drove me nuts till I fixed it .
My balance shaft is completely removed. Here are the parts used.
My balance shaft is completely removed. Here are the parts used.
#5
Rennlist Member
What is the performance benefit to leaving off the balance shaft belt, it it just less parasitic drag on the crank? Other than a resonation/vibration around 3000 revs are there any downsides like premature crank damage or anything?
I think onw of my buddies into Honda's said that allot of guys removed this feature on their newer Preludes with no ill effect.
I think onw of my buddies into Honda's said that allot of guys removed this feature on their newer Preludes with no ill effect.
#7
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Deleting the Balance shafts, dosen't really give you any added power. But it does cancel the chance of having a belt failure, oil leaks and it makes for less stuff under the hood.
deleating the Balance shafts, is fairly easy , depending if the engine is out of the car or not. All you want to do is, to weld shut, all of the oiling holes on the block, except for the one that feed the turbo.
That one , you tap a male fitting into it, and you fabricate a line that will screw onto it, to bring the oil to the turbo. It's not very complex, but you do need to fing the right size fitting.
deleating the Balance shafts, is fairly easy , depending if the engine is out of the car or not. All you want to do is, to weld shut, all of the oiling holes on the block, except for the one that feed the turbo.
That one , you tap a male fitting into it, and you fabricate a line that will screw onto it, to bring the oil to the turbo. It's not very complex, but you do need to fing the right size fitting.
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#11
Three Wheelin'
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Excellent, thanks for the info. I will tap the oil feed hole. Looks like I will just leave off the balance shaft cover and leave that side open. Should any type of thread sealant be used to prevent leaks?
I thought about leaving the balance shaft in and just removing the belt, but I didn't like the idea of trying to get the turbo's oil through a non spinning bearing. Also, the damn shafts weigh about 30 lbs, so its a significant weight savings.
I thought about leaving the balance shaft in and just removing the belt, but I didn't like the idea of trying to get the turbo's oil through a non spinning bearing. Also, the damn shafts weigh about 30 lbs, so its a significant weight savings.
#13
Race Director
Originally Posted by madsedan
What is the performance benefit to leaving off the balance shaft belt, it it just less parasitic drag on the crank? Other than a resonation/vibration around 3000 revs are there any downsides like premature crank damage or anything?
I think onw of my buddies into Honda's said that allot of guys removed this feature on their newer Preludes with no ill effect.
I think onw of my buddies into Honda's said that allot of guys removed this feature on their newer Preludes with no ill effect.
Well it is hotly debated, but worst case potential is a broken oil pickup tube from the vibrations. The broken pick-up tube will result in a blowen up motor (lots of little bits & pieces).
I personally would not advise it for stock internals cars. For cars with knife edge cranks and other internal lightening it my be ok or even better.
#14
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Originally Posted by M758
Well it is hotly debated, but worst case potential is a broken oil pickup tube from the vibrations. The broken pick-up tube will result in a blowen up motor (lots of little bits & pieces).
I personally would not advise it for stock internals cars. For cars with knife edge cranks and other internal lightening it my be ok or even better.
I personally would not advise it for stock internals cars. For cars with knife edge cranks and other internal lightening it my be ok or even better.
My block was just welded, not the trick parts like Rage has, which is best option because it could be reversed if you wanted IMHO
#15
Three Wheelin'
Originally Posted by Dave E
I'm having Scott install that kit in my engine and was wondering if that was the same one.
It's similar. The parts that take the place of the balance shaft are hollow (machined from tube stock instead of bar stock) and have a groove machined around them for better oil flow. With power steering delete, the plugs for the front of the engine take the place of the gear carriers and use thier factory O-ring. If your keeping the p/s the above still applies to the upper balace shaft. I'm not sure how the lower carrier/ p/s bracket is adresses if p/s is retained. somone posted a pic of the kit a while back, you may e able to dig it up if you do a search.