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Author Topic: Dolmar 7900 Porting Info  (Read 14922 times)

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Re: Dolmar 7900 Porting Info
« Reply #50 on: June 30, 2014, 12:18:23 am »
I bet that one would run a shorter bar good.
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Re: Dolmar 7900 Porting Info
« Reply #51 on: June 30, 2014, 12:28:20 am »
Sir yes sir.

395xp carb.
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Re: Dolmar 7900 Porting Info
« Reply #52 on: June 30, 2014, 02:22:13 am »
How much work was the 395 carb?
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Re: Dolmar 7900 Porting Info
« Reply #53 on: June 30, 2014, 08:44:02 am »
Not a problem. Use a 372 intake boot, cut the ear off and twist is some, so the carb sits level again. There was something with the cable too. I can't remember.

On the air filter elbow.....use one from a 395 or a 272....etc. 
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Re: Dolmar 7900 Porting Info
« Reply #54 on: June 30, 2014, 09:43:27 am »
Quote from: Mastermind on June 29, 2014, 11:59:37 pm
A **** load of saws have passed in front of me since this thread started.

Here something I tried not long ago.

Too wide on the uppers really......but a fun saw to run.



Nice. So how did it do?

Randy could you remind me for the 100thteen time what the stuff is you use for base sealer again?    I can never remember.   Maybe if in type here I will have something fall back on. Thanks.
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Re: Dolmar 7900 Porting Info
« Reply #55 on: June 30, 2014, 09:52:45 am »
I use Loctite 518.

The parts have to be dead clean......and it needs to cure for 12 hours.
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Re: Dolmar 7900 Porting Info
« Reply #56 on: June 30, 2014, 10:04:35 am »
Quote from: Mastermind on June 30, 2014, 09:52:45 am
I use Loctite 518.

The parts have to be dead clean......and it needs to cure for 12 hours.

Have you or anyone else tried 515?  similar stuff a bit easier to spread out. That is what echo recommends on some of their crankcases along with threebond.
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Re: Dolmar 7900 Porting Info
« Reply #57 on: June 30, 2014, 11:25:15 am »
Anyone know if there is ANY actual differences between the OEM Dolmar 7900 cylinder and the OEM Solo 681 cylinder?
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Re: Dolmar 7900 Porting Info
« Reply #58 on: June 30, 2014, 11:29:58 am »
Never checked but there has to be port timing difference IMO.  The stock 681's I ran were so strong and it cant be because of just 1mm more stroke. Just my guess.
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Re: Dolmar 7900 Porting Info
« Reply #59 on: June 30, 2014, 11:36:25 am »
Quote from: Cut4fun_ on June 30, 2014, 11:29:58 am
Never checked but there has to be port timing difference IMO.  The stock 681's I ran were so strong and it cant be because of just 1mm more stroke. Just my guess.

I agree add what you said to the fact that you need a 1.5mm spacer to make the NWP BBK Dolmar jug work on the 681. There must be some sort of timing difference!
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