i've read some archived topics about the mahle gold series pistons. they claim that they work on the frm sleeved pistons, but i would like to hear what h-t'ers whove actually tested out their pistons have to say. i also ran into this thread where their low comp piston was out of whack https://honda-tech.com/zerothread?id=991635. have they made any progress? but im more focused on the NA 11.5:1 pistons. Have the higher comp pistons had the same shallow reliefs, uneven skirts, and rod to piston clearance problems as the lower comp pistons?

 

Only thing I've heard is what Earl has to say. He's had some bad things to say about them in other threads as well..

Its a catch 22 because its the only piston we can run in the stock sleeve..

 

and the type s, and the jun is our only options =p so it seems.

 

4032 alloy and a break in aid anti friction dry fim coating is what makes it work. Thats all the Mahle pistons use, JUN uses a 4032 alloy as well. JUN piaston are made byCosworth, Cosworth uses a slightly different grade of 4032 for thier FRM forgings but all in all, its still the same.

See, none of you guys have used a 4032 alloy piston. The only people Ive seen using forged pistons in a stock block have used 2618. Theres no real secret that only JUN or Mahle know, its simply the fact that its something you guys havent really looked into trying on your own coupled with makreting from these companies that have lead you to believe its an impossible task.

I worked gfor a company that did some development work on a FRM friendly piston for the H22/23 and F20C. Im not just talking out of my *** here, Im telling you guys what we found out after testing.

Skirt design plays an important role a well.

Unfortunately they felt there wasnt enough of a market out there togo forth with the product

 

The problem with Mahle pistons though, they valve reliefs arent cut right and some of the other final machining is off a bit. They are working on improving that (so I hear) butas of now, they are not a drop in no mod install by any means.

 

thanks for the replies. i still dont understand why they haven't taken their products off the market and continue to sell, i guess you can say FAULTY products, or at least not as drop in as they have described.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote">4032 alloy and a break in aid anti friction dry fim coating is what makes it work. Thats all the Mahle pistons use, JUN uses a 4032 alloy as well. JUN piaston are made byCosworth, Cosworth uses a slightly different grade of 4032 for thier FRM forgings but all in all, its still the same.

See, none of you guys have used a 4032 alloy piston. The only people Ive seen using forged pistons in a stock block have used 2618. Theres no real secret that only JUN or Mahle know, its simply the fact that its something you guys havent really looked into trying on your own coupled with makreting from these companies that have lead you to believe its an impossible task.

I worked gfor a company that did some development work on a FRM friendly piston for the H22/23 and F20C. Im not just talking out of my *** here, Im telling you guys what we found out after testing.

Skirt design plays an important role a well.

Unfortunately they felt there wasnt enough of a market out there togo forth with the product </TD></TR></TABLE>
The coating is PC9 correct rick? Supposedly Endyne made FRM friendly pistons with the same ingredients as these, 4032 alloy and coated with PC9. Or thats what larry said. No one ever had the ***** to try them in the past. Someone do it!

 

Call Swaintech. I know for a fact swain tech has a coating that works

 

Too bad i dont own a car with a h22 in it anymore.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BolivianFuego &raquo;</TD></TR><TR><TD CLASS="quote">Too bad i dont own a car with a h22 in it anymore. </TD></TR></TABLE>

So, how long has it been since you lost your *****?

J/P man

 

so for swaintech do you buy any forged piston and have them coat it?

 

I wouldnt say any forged pistons, your going to need a 4032 alloy forging base and a OEM ring set, thats key... Make sure to use Honda rings.

 

is it hard to find a 4032 based piston... I wouldn't know the first place to start looking

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote">

So, how long has it been since you lost your *****?

J/P man </TD></TR></TABLE>
:shakes Fist:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by darkspector &raquo;</TD></TR><TR><TD CLASS="quote">is it hard to find a 4032 based piston... I wouldn't know the first place to start looking</TD></TR></TABLE>

Try Endyne, they were offering 4032 based pistons a while back and probably are til now. Talk to larry and see if he can hook it up with a piston thats already coated and ready to pop in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BolivianFuego &raquo;</TD></TR><TR><TD CLASS="quote">Try Endyne, they were offering 4032 based pistons a while back and probably are til now. Talk to larry and see if he can hook it up with a piston thats already coated and ready to pop in. </TD></TR></TABLE>

Hmm... I dont really know much about the coatings wiseco uses on their pistons now, its been a long while since Ive even seen a wiseco piston. Id try contacting wiseco directly and see if you can get a set of 4032 pistons uncoated. Just send them to swaintech and let them work their magic.

 

so..has anyone heard anymore on the mahle pistons??
i was considering running their pistons with my nitrous setup this summer

 

so what im hearing is to run forged pistons in FRM you need 4032 alloy make , oem ring pack, with some superduper special coating from swaintech?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">so what im hearing is to run forged pistons in FRM you need 4032 alloy make , oem ring pack, with some superduper special coating from swaintech?</TD></TR></TABLE>

I think you maybe onto something

 

Another important point from what I have read is to make absolutely sure that your piston to wall clearance is within factory specs. Don't let your builder 'do you a favor' by making the clearances a bit larger than spec.

 

Piston to wall clearances arent supposed to be OE, they are supposed to be with in recomended specifications of the piston manufacturer. Often times buildiers will try and run slightly tighter clearances which in some isntances, granted they take piston expansion under heat into consideration, may actually help in terms of power production. But to go looser, your pretty much asking for trouble. Just keep it on the dot with the spec sheets recomended clearances and youll be gravy...

Also, make sure the pistons are mic'd after the coating and base your clearances off of those measurements rather than the final finished numbers from the manufacturer.

 

Good ol' Ricky.

 

good info here, somebody call up swaintech and figure out how much it would be to coat 4 pistons, and also, lets try to find out if endyn will make 4032 pistons....

if so, lets try to get a group buy with both companies going on this, im sure we would have a big market....

if nobody jumps on this i guess i will do it eventually....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote"> Just keep it on the dot with the spec sheets recomended clearances and youll be gravy...

Also, make sure the pistons are mic'd after the coating and base your clearances off of those measurements rather than the final finished numbers from the manufacturer.</TD></TR></TABLE>

this brings me to the next obvious question, is there is alot of gray areas when it comes to boring and honeing h series, is it really that different than other motors?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">

this brings me to the next obvious question, is there is alot of gray areas when it comes to boring and honeing h series, is it really that different than other motors?</TD></TR></TABLE>
Can't Answer that Q personally as i dont have too much experience with boring and honing H series's. Maybe ricky can come in and help.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">good info here, somebody call up swaintech and figure out how much it would be to coat 4 pistons, and also, lets try to find out if endyn will make 4032 pistons....

if so, lets try to get a group buy with both companies going on this, im sure we would have a big market....

if nobody jumps on this i guess i will do it eventually....
</TD></TR></TABLE>

Its not really endyne that do their own pistons its wiseco that was making them.

 

^^sounds good, i have heard enough bad stuff about endyn anyways.....thx for the info