Topic: New 110 high compression pistons (Read 10059 times)

Zinister · « **on:** October 13, 2009, 09:56:21 AM »

A local mechanic told me these just came out within the last month. Anyone have any info?

sportygordy · « **Reply #1 on:** October 13, 2009, 10:22:25 AM »

What is the new part number?

jfh · « **Reply #2 on:** October 13, 2009, 04:40:51 PM »

I haven't seen any new 4.00" pistons in the SE catalog or on the MoCo website.

BADBAGG · « **Reply #3 on:** October 13, 2009, 04:59:22 PM »

I have them installed in my bike.
22502-07
kit,pist,110 h/c forged,std
fits 07 + later twin cam models equipped with 4" bore cyclinders.

BADBAGG · « **Reply #4 on:** October 13, 2009, 05:08:35 PM »

here is the box.........

Gone Fishin' · « **Reply #5 on:** October 13, 2009, 06:09:00 PM »

With a part number ending in -07, it is safe to say that this is not really a new item.

Does anyone have results in what these improve over stock?

Ride safely,
Louis

HD Street Performance · « **Reply #6 on:** October 13, 2009, 07:07:20 PM »

They are a very nice Wiseco piston
11/1 compression, not what works well on many street motors

Unbalanced · « **Reply #7 on:** October 13, 2009, 07:28:49 PM »

Quote from: BADBAGG on October 13, 2009, 05:08:35 PM

here is the box.........

http://www.hmhd.com/webstore/viewiteminfo.asp?sku=22502-07

Bump torque and horsepower on your 110" Twin Cam powertrain with the addition of high compression pistons. Developed for the 110" Race Kit, these pistons increase compression to 10.5:1. Forged from high strength aluminum, the pistons are precision machined and feature coated skirts for a tight tolerance fit and quieter operation. All EFI models require ECM calibration (priced separately.) For Race Application only.

Fits 07-later Twin Cam models equipped with 4" Big Bore Cyliners.

I was told these are Mahle Pistons not Wiseco.

sadunbar · « **Reply #8 on:** October 13, 2009, 07:31:18 PM »

Quote from: Unbalanced on October 13, 2009, 07:28:49 PM

http://www.hmhd.com/webstore/viewiteminfo.asp?sku=22502-07

Bump torque and horsepower on your 110" Twin Cam powertrain with the addition of high compression pistons. Developed for the 110" Race Kit, these pistons increase compression to 10.5:1. Forged from high strength aluminum, the pistons are precision machined and feature coated skirts for a tight tolerance fit and quieter operation. All EFI models require ECM calibration (priced separately.) For Race Application only.

Fits 07-later Twin Cam models equipped with 4" Big Bore Cyliners.

I was told these are Mahle Pistons not Wiseco.

So was I... I wonder what they actually are - since I was told this by a MOCO parts counter person - not widely known to be a reliable source of information...

johnsachs · « **Reply #9 on:** October 13, 2009, 08:24:54 PM »

Just checking an invoice I have for 3 sets of # 22502-07,dated 9-16-09,and I can assure you that the sets I got were MAHLE coated,+11 cc dome pistons.

John

sadunbar · « **Reply #10 on:** October 13, 2009, 08:26:44 PM »

Quote from: johnsachs on October 13, 2009, 08:24:54 PM

Just checking an invoice I have for 3 sets of # 22502-07,dated 9-16-09,and I can assure you that the sets I got were MAHLE coated,+11 cc dome pistons.
John

thanks John....

Unbalanced · « **Reply #11 on:** October 13, 2009, 08:40:33 PM »

Scott,

Just got home I guess guess I don't need to post now that John said mine where Mahle's. Ya got it from the horses mouth so to speak already. Mine were bought 2 years ago so they aren't new to the market.

HD Street Performance · « **Reply #12 on:** October 13, 2009, 10:53:21 PM »

Sorry for the mix up guys I was confusing these with the 113" HC pistons for the ACR head package.

Zinister · « **Reply #13 on:** October 14, 2009, 08:43:48 PM »

Do you like the piston swap over having the heads machined down for the bump in compression?

What kind of gains did you see?

StreetDog · « **Reply #14 on:** October 14, 2009, 10:07:29 PM »

I have these pistons in mine and I now get the occasionally sparknock that I never got before. I am careful of what name brand of gas I use but still get it at slower speeds. Maybe there is an adjustment I need to do.

sportygordy · « **Reply #15 on:** October 14, 2009, 10:17:05 PM »

Quote from: KingDog on October 14, 2009, 10:07:29 PM

I have these pistons in mine and I now get the occasionally sparknock that I never got before. I am careful of what name brand of gas I use but still get it at slower speeds. Maybe there is an adjustment I need to do.

High Compresion will do that and each year our gas blends gets worse and worse... It won't be long until 9:1 will be routine pinger's.

Zinister · « **Reply #16 on:** October 14, 2009, 10:52:33 PM »

Does SERT adjust your timing curve? That would solve your pinging I think.

Have you had your bike dyno tuned. If so what were the results?

HD Street Performance · « **Reply #17 on:** October 16, 2009, 09:51:01 AM »

The Delphi ECU has ION sensing to pull out timing if it detects pinging but the better approach is not to build in too much compression utilize a tight squish and tune it properly to avoid ping in the first place. The Delphi knock control is a power drainer and erratically can pull too much timing at times.

Unbalanced · « **Reply #18 on:** October 16, 2009, 09:54:36 AM »

In the map you have currently in the bike are you sure that the knock sensor is turned ON? If you do a data gather you can capture when the knock sensor is going on just remember the event has already happened when you see it.

HD Street Performance · « **Reply #19 on:** October 16, 2009, 10:05:23 AM »

Good points

Author Topic: New 110 high compression pistons (Read 10059 times)