I am getting ready to build a B20vtec and was wondering which do you prefer and why. Any help will be much appreciated/

 

probably made by the same company and then each of those companies sells them as their own.

 

question is where do you buy one

 

http://fjdistributors.com/product_in...roducts_id=283

 

I'm currently running the YCP's in my stock bore B20.

The only advantage that RS Machines pistons have is their size availability. You can get them in .5mm increments, whereas the YCP's only come in 84/85mm.

That being said, I'm not sure on the RS Machine material, but the YCP's are made from AC8A aluminum alloy, the same as the YCP Vitaras. They are supposed to be stronger than OEM cast, but it's impossible to know without accurate testing.

I have put 1500 miles on the pistons, and no problems thus far. They are an excellent piston for the price. If you are stock bore, and your cylinders are not out of round (within spec), go for it.

 

thanks man

emailed them should be in stock after two weeks

glad someone tested them, i would take the std bore too if i could, the oem wall finish is nice.

 

also ycp have a teflon coating

 

Has anyone run RS machine Pistons? With the results that I am getting I should run the YCP.

 

i really don't think it matters what you run, more of a what you think is better

one isnt going to make any more power then the other one IMO

 

Piston wise, i'd run the rollerwaves, but thats just me..

 

im running rs machines... and with a mix of tracking and driving - already at around 15+++kms on it and going strong.. and its on a built setup making well over 200 whp..

 

Not everyone has $500 to spend on pistons.

Cast are perfectly fine for a street motor. Most setups people are doing don't even need forged pistons.

 

Especially all motor..

 

People act like this is a HIGH HORSEPOWER all motor build, but it is not. All I am looking for is a good reliable aftermarket piston to daily drive on and have some fun every once in a while.

 

If you can wait for FJT, hold out. You can save $100 over the RS Machines.

I was in your same position a few months ago. I had ordered them through FJT, but he informed me that they were on backorder.

A week later I got lucky and found a seller with a brand new 84mm YCP set on Ebay. Always helps to check that site frequently.

 

I have found YCP's on eBay for 249.99 plus shipping. The RS's were 300.00 plus shipping.

 

Eek, didn't know the YCP's were that much on Ebay. Got mine for $150 shipped.

 

Hehe.. the specific design allows for great combustion, less chances of knock and best of all, its forged..

But ok, if your going to spend 300 on a set of pistons, whats another 200 for a great set??

I dont ride the endyn bandwagon by any means, i think their **** is WAY overpriced..however one thing i like of theirs is their pistons.

 

are they high or low silicon pistons? i'm going to guess low silicon which means they will expand alot and on start up and which means loose pistons to wall clearance, but with cast you don't have to worry about this sort of thing

its been said time and time again that for a DD build cast beats forged every day of the week, plus you can use stock rods

 

Where did you get yours from?

 

Private seller on Ebay. They're only $220 from FJT though, and I doubt shipping is more than $15 since he's based in TX.

 

I emailed them 6am this morning and still have not got a reply. I really need to take the block to the machine shop first to determine what piston I need.

 

He's a small operation, so give him time.

First step would be checking the roundness of your cylinders with a dial bore gauge, if you have one.

If not, then yeah, take it to the machine shop.

 

Call FJ, it might take 10 rings but he will answer and he can tell you whatever you need to know about backorder length.

 

I've been daily driving a 13.0CR built b20vtec for the last 10 months..

I got these pistons for a reason, but i was just saying..might as well go with a piston that is designed to last and standup against knock and what not..