I have been reading for hours on here and need the best answers for my situations..I am using a4 block with JDM pistons..pistons are brand new can i get away with not honing my block if not what grit do I hone with..I been reading alot about rings I have gotten a set of Eve or evergreen same company do I use these or go to the npr rings...any help would be great..

 

In regards to honing, 2 things. 1 is piston to wall clearance, if it is within spec or not. 2 is wall condition, if you catch a fingernail on any scratches it needs a hone.

the frm walls use a special honing technique, which is detailed in the factory "helms" service guide, and there is a link to those guides in the FAQs.

I would use oem Honda rings, or Nippon.

Not sure which pistons you have, but I am still out on if the Nippon oem style pistons are really compatible with frm or not. Only time will tell, but I have not heard of anyone building an engine properly with them yet to give good feedback

 

You should NOT hone/deglaze an H series with tools designed for more typical iron sleeved engines. If there are no vertical scratches that run the length of the bore and there are no other major defects you DO NOT need to hone the FRM sleeves. Simply re-ring and go. Use the rings that came with the pistons.

 

Thanks I appreciate the info...

 

One more thing I was previously told I could run my milled head( .20 taken off) without adjustable cam gears I just wanna confirm this as I am not doubting the individual that told me this just like to get more than one input on that..thanks fellas for all the info..

 

There is NO good reason to mill a Honda DOHC head that much... stop listening to DOMESTIC engine builders on how to make more HP. Milling the head retards the timing event in relation to the crankshaft and you reduce quench area. Cam gears are used to adjust the belt-induced issue out and a custom Cometic head gasket will put back your quench if you add the milled amount of the head to the OE gasket thickness.

In short: If you want to cross your finders and hope you gain some power, go no cam gears. If you want to maximize your power, get a pair of gears and DEGREE them before installing the engine in the bay.

 

Thanks I appreciate the info I have another head not milled I am gonna just use that one..