Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - flatlanderfornow

Pages: [1] 2 3 ... 7
1
Briggs Flathead / Re: 18hp oppy vertical to horizontal
« on: July 17, 2017, 06:41:27 PM »
parts you need can be found on ebay, saw some tonight. type in  briggs twin sump.
You'll need one dipper for the mag side rod, and you'll have to drill some drain holes in where the valve springs are.  Also need the intake manifold and pto ball bearing. Should be about it.

2
Briggs Flathead / Re: Briggs 40CI to 42 CI
« on: June 22, 2017, 06:20:36 PM »
sounds like a pressure lube crank, although a 422437 indicates splash lube. Should work fine to change the crank and rods.

3
Briggs OHV & Vanguard / Re: Questions about Briggs V twin
« on: June 06, 2017, 02:42:34 PM »
303775 should be a 16 hp. Lots you can do with that if you want.

4
Briggs OHV & Vanguard / LMT 56
« on: June 04, 2017, 05:23:43 PM »
what enines did these come on? Sorry paul I forgot what you told me as I'm gettin daffier every day.
I want to put one of these on an old cast iron 30 cube engine for pulling.

5
Garden Tractor Pulling / Re: Exhaust size
« on: April 18, 2017, 06:46:04 PM »
if its a K301 Kohler use a 1 3/8 i.d. pipe 24-28 inches long.
You can get a K&N from Stens that fits in the stock air cleaner
housing or get an adapter from Zach Kerber or Vogel mfg. and use
the 2 7/16 hose clamp style one. May be other options as well but these
are the ones I know of.

6
Briggs Flathead / Re: Model 28 for pulling tractor.
« on: March 22, 2017, 04:20:40 PM »
Shave the head if you can and advance the timing.  No need for lots of fancy stuff at that RPM level with a stock cam.
Do a GOOD valve job on it and set the lash right. I'd be more concerned with getting the chassis to work good, as this is more important.   


7
Want To Buy / Who Has It? / Re: ISO 38 ci vanguard factory cam
« on: March 12, 2017, 08:06:15 PM »
Don't want to start a hissing match here but I doubt that cam will add 25%
In the 35 Vanny that cam and a 2 barrel carb add up to 2 hp ( 358xxx models)
Cam does have more lift but the .050 to .050 duration is about the same.
More lift never hurts of course, but duration is a big factor too.
Talk to Tyler Cromwell, he usually has some of these kicking around
and sells them reasonable.

8
Briggs Flathead / Re: Oppy 42 ci head: flow optimization / grinding issues
« on: December 08, 2016, 09:45:02 PM »
You have to advance the flywheel to do the ignition timing.  Clean the crank and bore of the flywheel real good then
turn it ahead 3 or 4 teeth on the ring gear from stock ( no need for the key). Tighten the nut to spec 140 ft lb I think

9
Briggs Flathead / Re: Oppy 42 ci head: flow optimization / grinding issues
« on: December 08, 2016, 06:40:02 AM »
Ignition timing
 1 tooth on the cam 10-12 degrees on the ignition

10
Briggs Flathead / Re: Oppy 42 ci head: flow optimization / grinding issues
« on: December 06, 2016, 05:15:28 PM »
advance tne cam 1 tooth and the timing 10-12 degrees
shave the ridge off the small chamber head and do a good valve job on it 3 or 4 angle on the intake wide contact on exhaust to dissipate heat better
make sure the valve lash is right  .004-.006" intakes .007-.009 exhaust
use the 4-bolt carb as it runs better stock than the 3-bolt much more responsive and atomizes better even though the hole is smaller
fancy porting and head work won't get you much with that pathetic stock cam but the above setup will make that engine very
torquy down low where you will be running

11
Briggs Flathead / Re: Oppy 42 ci head: flow optimization / grinding issues
« on: December 05, 2016, 05:37:49 PM »
You mean like this?



I was already wondering why every picture of 42 oppy cylinder heads I found on the web did not look like mine (far right one). There is the answer, I guess.



Do you think it is worthwhile grinding off the bit within the red circle? (not caring about losing compression by this)


yup.
What else are you doing to your engine?  Unless you're running a cam and other mods the heads are not likely to be the bottleneck.
I use the small chamber heads on my pullers and cut off the ridge around the combustion chamber to raise the compression-we're
not allowed to run cams so this helps them out at the lower rpm levels we run (4000 or so under load).

12
Briggs Flathead / Re: Oppy 42 ci head: flow optimization / grinding issues
« on: December 02, 2016, 04:18:23 PM »
the newer style 42 head is cut out a little more on the exhaust side about like you have it marked

13
Briggs Flathead / Re: 46 oppy big bore pistons
« on: November 30, 2016, 04:47:54 PM »
thanks

14
Briggs Flathead / Re: Oppy twin
« on: November 30, 2016, 01:07:11 PM »
I've done several including 2 pressure lube engines (mounted crank to crank on a puller)
You have to drill holes in the valve spring cavity for drainage and bend a dipper so it don't
hit when the crank comes around. 

15
Briggs Flathead / Re: 46 oppy big bore pistons
« on: November 30, 2016, 01:00:08 PM »
What Paul said
3 9/16 bore 31 cube pistons are the same size but appear to be dished
Seems to me that would take the 7:1 compression and make it 
4:1 or something

Pages: [1] 2 3 ... 7
anything