I'm building an N/A B17, and I bought a CTR pulley. I was told not to use it because the pulley does not have a harmonic balancer and it could lead to oil pump failure. Can anyone substantiate this?? I'm having my entire rotating assembly balanced anyways. Thanks for your help.

 

I bought an EG hatch that shattered it's oil pump...the engine was a boosted b17 with a CTR pulley. I'm sure you would be fine if everything was balanced correctly but in this particular case the pulley was just put on and the motor was beat on.

 

i find that when searching on this exact topic, the people that use them usually dont have any issues. and the ones that have never used them, say that they shatter oil pumps and such. its ur call, but, i have seemed to have notice one particular thing..... when 16a/b's run the n1 pulley, people rarely ever have any issues......maybe its a 1.6L pulley????

 

B17 16 years, UR pulley 13 years, it’s an over hyped myth.

 

Not a myth, but it really depends on how you drive it. If it's daily driven, I doubt that you'll have an issue for a long time. If you autocross or road race frequently, you're more likely to hit the critical speeds.

 

OK, an urban fable, a road race or autocross engine sees much more frequent rebuilds and maintenance then a daily driver. If wear is the "issue" you speak of it will be dealt with routinely.

 

Heh. I'll go with that.

 

On a stock b16, sure. Anything built, forced induction, or going to spend extended trips at high rpms, no.

 

You will be fine on a B17.

 

... once again with this myth ive had one on my drag car for a year of beating.

just think of it this way yes the aftermarket pulleys have these problems you speak of but honda made the ctr pulley and do you really think they would put somthing unbalanced on there own car... no

 

o also my b16a is fully built with 13.5:1 compression and a 100 shot of nitrous redlines at 9300 not a bit of vibration in it

 

No honda would not put a pulley on a motor and unbalance it, someone else I don't know.


How many miles have you put on this motor? Have you torn this "drag" motor down and inspected it?

 

The ctr pulley doesn't make the motor unbalanced, it just doesn't absorb the harmonic vibrations like the factory dampner does. Therefore on boosted or nitrous motors that have alot more shock loads and harmonic vibrations, it is probably not good to use a ctr pulley. On a NA application whether it be stock or built, I personally think a ctr pulley is ok even though I always use a oem dampner or an ATI dampner.

 

Sounds great, thanks for the input. I actually got my block and crank back today. The guy says it was one of the nicest blocks he's done in a while. The balance of the crank was dead on, so he just re-polished the journals, and he said my bore went real smooth and the hone as well. He also said that the line-bore of the main caps was within spec. I'm having my buddy's dad mic my journals and find out exact piston and main bore sizes so I can get my bearings ordered.