Author Topic: Dolmar 7900 piston choices (Read 7018 times)

mdavlee · « **Reply #10 on:** November 29, 2011, 06:19:49 pm »

I thought the 7900 used a windowed piston for the whole time. I remember cutting scott posting about a new updated one a couple months back. I remember romeo used the 272 piston in the 7900. I haven't researched it in a long time since I sold the 2 I had.

bloodontheice · « **Reply #11 on:** November 29, 2011, 08:00:27 pm »

The one I have is a new top end and no windows in this piston, I'll post pictures tomorrow if I get a chance.

mdavlee · « **Reply #12 on:** November 29, 2011, 08:24:30 pm »

I found the thread over there. The new updated piston has no windows.

Cut4fun . · « **Reply #13 on:** December 17, 2011, 05:27:09 pm »

Anybody else heard of the Wiseco 52mm pistons being put in the hot woods ported 7900's out there. Anyone else using them?

I had heard about them being made for the 5ci builds in 52mm bore racesaws in 372xp with 2mm stroked cranks. But this is the first I have heard of a wiseco going into the 7900's.

EHP · « **Reply #14 on:** February 27, 2012, 09:46:12 am »

in 1 month I will have wide skirt pistons , skirt width of 1.66 inch in 12mm pin size but will need a spacer as they were based off of the 272 piston and with the wider skirt its easier to fit the piston into the crankcase when with a lower pin location

EHP · « **Reply #15 on:** May 04, 2012, 04:39:07 pm »

Cut I pit a picture of the wide skirt 52mm piston on my site , picture is to big to post here

Cut4fun . · « **Reply #16 on:** May 04, 2012, 05:37:34 pm »

Cool. Is it OK to leach your pic there and post here for other signed in members to see? I will embed it so guest cant see it.

EHP · « **Reply #17 on:** May 04, 2012, 07:05:45 pm »

sure go a head

Cut4fun . · « **Reply #18 on:** May 04, 2012, 08:15:57 pm »

Thanks Ed. I'll let you give the info and weights etc.

EHP · « **Reply #19 on:** May 04, 2012, 09:08:32 pm »

piston on left is a 7900 used piston, with ring it weighs 85.4 grams , skirt width of 32mm/ 1.260 inch
middle is the wide skirt wiseco piston, with ring it weighs 79.7 grams and has a skirt width of 1.670 /42,5mm
right piston is a stock 272 piston weight was 82.9 grams with ring , skirt width is 35.83mm/1.414 inch,
so race piston is wider and lighter and will fit the 7900/272/460 stihl , I built this piston maining for a race piston and to be run on alcohol/nitro, as you can see its coated everywhere , I also have pistons made in 60mm, 62mm, and 66mm

Chainsaw Repair

News:

Author Topic: Dolmar 7900 piston choices (Read 7018 times)

mdavlee

Re: Dolmar 7900 piston choices

bloodontheice

Re: Dolmar 7900 piston choices

mdavlee

Re: Dolmar 7900 piston choices

Cut4fun .

Re: Dolmar 7900 piston choices

EHP

Re: Dolmar 7900 piston choices

EHP

Re: Dolmar 7900 piston choices

Cut4fun .

Re: Dolmar 7900 piston choices

EHP

Re: Dolmar 7900 piston choices

Cut4fun .

Re: Dolmar 7900 piston choices

EHP

Re: Dolmar 7900 piston choices

Related Topics