NonStopTuning (NST) K20 SI Kit DIY, Pics, Dynos...

[Demo22]

i placed an order and havent recived no response from them

[cminbust6]

i ordered mine 2 weeks ago and it arrved 3 days later.Very fast delivery.Then just installed t today on my FA5.Resluts are better throttle response.Next will be my TBspacer.I have it but i forgot to order the gaskets wth them

[DBFIU]

Hello, I am a Mechanical Engineer. I do not work for Honda so take my opinions as they come.

I understand Freerides point that the stock pulley has the rubber ring for a reason, to dampen, reduce NVH. I personally don't think that by replacing that rotational device by a solid pulley will result in any great engine damage. In my humble opinion it is safe to say that the engine will probably fail due to normal causes (wear and tear) before the pulley's cause. If and only if the pulley had true balancing characteristics (a bulging counterweight on one side) and it was to be removed than that could be dangerous.

A lot of V8s use external balancing because the V orientation of the engine introduces forces in odd directions. Race and some modern V8s undergo zero balancing, sort of like the inline 4s.

Inline 4s are much easier to balance than V8s because the V8s like i said, produce extra force components that must be accounted for.

In any case, looking at the system as a whole. It is safe to say that through the belt, clutch, bushings, engine mounts etc... there is enough damping.

Now if you were to go with solid engine mounts, solid bushings, 6 puck clutch, FI and shave 400 lbs you are going to reduce the damping characteristics of the car as a whole. Other than that, the pulleys seem fine in my book.

My 2 cents.

- Dan

[Demo22]

i order mine last sunday

[MatUK.8]

Originally Posted by pogi666ako

Of course the company is gunna tell you there is no problem...they want you to buy their product!!!

But you got to think, why would a company put out a product that is going to cause damage, they would be responsible for destroying thousands of engines and would be screwed. Also I am sure they could replicate the dampener and balancing of the stock pulley without much cost.

[NonStopTuning]

All of these topics, frequently asked questions, discussion, etc can now be found at the following link. Add to that, the testimonials of hundreds of NST customers who use these pulleys on their Honda Civic and Honda Civic Si engines...

http://www.8thcivic.com/forums/bolt-...g-pulleys.html

Please feel free to post your thoughts and comments there in that thread everyone.

[Hi-ReV]

would honda install the nst pulley's? if so how much would they charge? oh and would they install a img for me?

[leeban]

Recvd my pulley set today ... looks amazing. Hope to have it put on within a week.

[TECHNICS]

Originally Posted by Tom1222

Buy the Ingalls "Stiffy" (Torque dampner) instead

Reduces wheelhop and makes the car feel more responsive. At least to me.

Would these fit, if i had and ETD installed. Such as the Ingall's Stiffy?

[jaxson]

Im a mech. engr. and I dont see an arguement. Based on facts, the solid pullie will not absorb harmonic vibrations as well as the one with a rubber ring. However your engine will die of wear and tear before the pullies really damage anything.

And honda will not include/design anything in the car without a reason. Everything has a function, because they will do whatever it takes to save money, as any business would.

[leeban]

Originally Posted by TECHNICS

Would these fit, if i had and ETD installed. Such as the Ingall's Stiffy?

I put on my pulley kit and I have the Ingalls stiffy and torque stick. Had to grind down the bottom of the stiffy bracket a bit but after it fit like a glove.

[IndyMike]

Originally Posted by leeban

I put on my pulley kit and I have the Ingalls stiffy and torque stick. Had to grind down the bottom of the stiffy bracket a bit but after it fit like a glove.

Same here. Luckily my neighbor had a grinder he let me use. It's still pretty tight but the Pulleys rock.

[NKSMugen]

i heard that by installin the entire kit it has the potential to throw off the balance of crank shaft, has anyone had a problem with this or have heard the same thing?

[Notoriously_rob]

the crankshaft is internally balanced on the Civic Si, and the pulley has no effect on the balance AT ALL. older pulleys with harmonic dampeners would affect the crankshaft balance, but todays modern engines it wont.
PS> NST, if you read this...Thank you for your support/patience with my order. I cant wait to install......

[lessthanwise]

Originally Posted by DBFIU

Hello, I am a Mechanical Engineer. I do not work for Honda so take my opinions as they come.

I understand Freerides point that the stock pulley has the rubber ring for a reason, to dampen, reduce NVH. I personally don't think that by replacing that rotational device by a solid pulley will result in any great engine damage. In my humble opinion it is safe to say that the engine will probably fail due to normal causes (wear and tear) before the pulley's cause.

In any case, looking at the system as a whole. It is safe to say that through the belt, clutch, bushings, engine mounts etc... there is enough damping.

I'm sorta with you here...let's not forget the balance shafts in the oil pan on the k20z3...while they're annoyingly obviously at idle, the few horses they're sucking off the motor go into reducing vibrations at speed. Changing the crank pulley to a simple solid metalic unit is an error if you plan on keeping the car long term. Why do you think honda built theirs the way they did? Because they're rocket scientists...literally. If you're looking for performance and precision dampening I recommend ...

Fluidampr

[kwonoh2]

couldnt see any pics from link.

[sb12007]

Originally Posted by MonkayMan17

The only "bad" thing is that that crank pulley does not have a hermonic balancer like the stock one to take vibrations and other problems that could do damage...But im interested in a k20 or even better r18 dyno with these. thanks!

K20 engines are balance internally. Their is no harmonic balancer on the Si engines.

[VTAKJuice]

Is this really worth the price and effort?

[gunhoe86]

Originally Posted by VTAKJuice

Is this really worth the price and effort?

Yes!!!

I installed mine today, here's few more pics to add to the numerous others on this site.

DIY: NST Pulleys for Civic Si

[Geovone]

Just wanna know exactly what this does? I mean, I'm trying to do a bit of research here and wanna know if I should go ahead and purchase these or buy P2R spacer along with X2 throttle body and intake manifold gaskets?


Thanks, Geo