This is Wiseco's new 86mm strutted/boxxed B-series forging. With my
dome
and valve pockets it came in at 204 grams with a .940 compression
height.
That's with 2618 alloy and a 3 ring Nitrided/Napier xx package that
doesn't
need a spacer ring. It's the first truly dedicated forging for the
86mm
N/A Honda Drag market, so it won't go less than 86mm and it won't
support
over a 19mm pin. It also won't build a dome that's less than 6 cc's or
so.
Wiseco supplied these with a 59 gram straight wall 9310 alloy tool
steel
pin. They use the same forging press they make their intricate
IRL/Cup/pro
stock forgings from. The two bridges between the pin bosses keep them
from
moving around at high rpm-so the pin bores look great after operation.
They
loaded these up with their top-of-the-line Xylan skirt coating too.
Because
of the supports under the deck of this piston, it should have a
relatively
long life compared to some of the internally-milled time-bombs on the
market. The only internal milling on the part is the window they put
in the
pin boss supports. It's a bit hard to see by the pictures, but the
underside perfectly follows the dome and valve pockets. Everywhere
there
isn't a support, the piston is a consistent .080" thickness. pricing
on
these things is about $650 w/ skirt coatings/gas ports/dome
polishing/pins/
and xx rings-That's actually a good deal considering what they charge
for
their IRL pistons.

 

Thats Right I said 204 grams !!!!

 

nice....as always brad

every new piston you do amazes me!

 

This thread was reported as a possible violation of forum rules because people were starting to ask for sets of the pistons.

The thread originator should be proud; however, if we engage in a conversation about where and how to buy them, and how much they will cost, the thread will have to be hidden again.

Some posts were deleted because the person who reported it appeared to have a point. I apologise for the interference, but please try to keep the discussion nonparochial and please adhere to the forum rules and common sense.



Thanks.

 

brad, i assume the only reason they are making them in 86mm is to solidify the fact they are "race pistons". what about the guys that dont wanna resleeve every single year and would rather have 85mm pistons with room to "expand"? is there any way to make that happen? let us know.

 

very nice!
bottom pic looks like Pro/E rendering of the piston

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">brad, i assume the only reason they are making them in 86mm is to solidify the fact they are "race pistons". what about the guys that dont wanna resleeve every single year and would rather have 85mm pistons with room to "expand"? is there any way to make that happen? let us know.
</TD></TR></TABLE>

A race engine can be bored out to 86.5 and then 87mm

B series engine needs as much bore as you can get...

 

wow thats a nice looking piston you got there sir

 

very good looking piston.


harv


also what is the c/h on these pistons.

harv

 

says in the first post .940 CH

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1700anddroping &raquo;</TD></TR><TR><TD CLASS="quote">
also what is the c/h on these pistons.
</TD></TR></TABLE>

.940

 

i must of over looked that...oops? very very nice piston tho.

 

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

A race engine can be bored out to 86.5 and then 87mm
</TD></TR></TABLE>
I get your point, but you've missed ours. While I realize you're trying to make the "perfect piston" here, you're not taking reality into consideration. Very few people are going to be willing to bore their sleeved motors to 86mm just to run your piston. Many people already have 85mm bore sleeved motors. Instead of hiding behind vague (although true) statments like:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MAX_CFM &raquo;</TD></TR><TR><TD CLASS="quote">
B series engine needs as much bore as you can get...
</TD></TR></TABLE>
Why don't you elaborate on why the 1.18% difference in bore traslating into a 2.37% difference in displacement is so important that you'd be willing to exclude the bulk of your audience?

 

Displacement has nothing to do with it ...


This is for Prostock cars

or World challenge or Hi end race classes ...

 

If you want to understand what Brad means about the bore, you will have to keep in mind that he is a head porter. That should tell you what he means by that

 

If a small boat and a large boat both sink and you are in the middle of the two, which way do you think you will get sucked down...

If you're running an engine that is already sleeved, then whats the problem with taking it apart and getting it bored to 86mm?

 

And you guys aren't realizing that with this size bore you can use these in F-series setups as well...

 

Kind of small for an F series... Not considering other factors.

 

86 is stock f23 bore, 87 is stock h22 bore.. could these be made in 90mm??

 

Thats a nice *** piston. I am guessing the very small compression height is to allow longer rods and reduce weight. BTW, is that a solidworks rendering in that last pic, that software is awesome.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">Kind of small for an F series... Not considering other factors.</TD></TR></TABLE>

Well like J Dogg said... 86mm is stock F23 bore and F22 bore is 85mm bore... What other factors would you take into consideration?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sam1am26 &raquo;</TD></TR><TR><TD CLASS="quote">
... What other factors would you take into consideration?</TD></TR></TABLE>

valve angles, and such..

 

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

valve angles, and such..</TD></TR></TABLE>

Ding ding ding.

 

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

Ding ding ding.</TD></TR></TABLE>

lol... Well I am well aware of that, but the valve angles are similar enough between b/h series... Worst case scenario you can have the valve reliefs cut...

 

k20's are 86 and k24s are 87

is this the market your aiming towards also brad?