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Author Topic: Titanium Valves search  (Read 5933 times)
Greg Ward
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« Reply #60 on: June 27, 2018, 08:51:21 AM »


Still working on the piston/barrel part of this engine, I have some pistons I want to use that need milling on the top and valve pockets cut in them.

The barrels need to be shortened as the pin height is a lot higher.

The case for all this, I'm unsure of, I have a brand new MAG mexican case that I got in a job lot, or I could purchase a new non-raised roof AL case, I'm undecided at this point.

Cheers,

Greg
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PPRMicke
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« Reply #61 on: June 27, 2018, 15:06:49 PM »

And after another few hours, the blended manifolds attached to head in the middle shot, looking back up.

I  didn't want to go too far to have to start welding manifolds because of thin metal, but this looks far enough to me, when I ran water through it each time to clean out the debris from porting, the water actually spins in the chamber to the contour of the manifold.

Let's hope this happens with the Air/Fuel mixture as well and it works like I envisage it should!

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Hi Greg
I would think you need to file them 2-2.5 "from the head
If you have the opportunity to test them in the flow bench I would think that the head flows more without a manifold
/// Micke
« Last Edit: July 02, 2018, 13:17:21 PM by Erlend / bug66 » Logged
PPRMicke
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« Reply #62 on: July 02, 2018, 11:27:46 AM »

Hi Greg
If not, it may look like this
Head is the high numbers. Dom low is with intake
« Last Edit: July 02, 2018, 11:35:33 AM by PPRMicke » Logged
Greg Ward
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Posts: 90


« Reply #63 on: July 06, 2018, 09:55:03 AM »

Thanks heaps, I get the idea, my "flow bench" is the water faucet when I run hot water through to get the swarf out of either head or manifold.

I've gone up the manifold as far as I believe it is valid, I'm not into hogging things out for more flow, this has worked really well for me before, so I'll run with what I've done so far.
Smaller porting and faster airspeed, remember this set of heads are stock, they only have 35.5mm inlet and 32mm exhaust valves.

I need to get the pistons and barrels sorted, then I can put the rest of it together.

Cheers,

Greg
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Jim Ratto
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« Reply #64 on: August 20, 2018, 17:53:08 PM »

Hi Greg, just wondered what the latest update was on this engine project. Very interested in how this is going,   thank you,

Jim R.
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DER KLEINER PANZERS

All animals are equal, but some animals are more equal than others.
(George Orwell)
Greg Ward
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Posts: 90


« Reply #65 on: August 27, 2018, 08:52:43 AM »

G'Day Jim,
Ah, I've had that thing happen which stops a lot of projects moving forward, for many of us for different reasons, my mother fell headwards into serious dementia some time ago, it got so bad recently, that I am now a full time carer for her.
She was 90yrs old this May gone, so I have been still on this project, but to make ends meet as well, I've been trying to work on some refurbished cylinder heads (that's the program) to still keep me sane working in the home garage.

I'm getting a weeks break very shortly, so I'll take some pics of a bunch of related items for this engine build, especially pistons and barrels, the pistons are from a very high revving commercial car, (talking $150 a set with ring set , instead of $700 for some Wisecos) ;-)

Magnesium case, it is brand new, but Hecho in Mexico, so I've ruined a new one of them many years ago before, but that was 94mm bore not 85.5mm, so I don't know but I'll try it.

BUT, I want this engine to be a 9000rpm engine, decided to use my 9500rpm JPM cam with this from my current race engine, but limited to 9, I do think these tiny stock valves with serious cam and springs will rev it's brain off, the same cam was on 48 x 40mm valves albeit Titanium ones....

So, I'll give you a bunch more info soon Jim, but I need to sort it out in the next couple of weeks, hopefully I can show you some dished pistons becoming flat tops and then valve pocketed as well...

Thanks for taking a serious interest mate.

Greg
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brian e
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« Reply #66 on: August 27, 2018, 18:23:19 PM »

I am also very interested to see this coming together.

Can't wait to see what your pistons are from.  I really appreciate out of the box true "hot-rodding", and finding alternate sources for parts rather then just ordering $$ stuff off the shelf. 

Brian
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modnrod
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« Reply #67 on: August 28, 2018, 11:36:07 AM »

85.5mm, hi rev, light, thin rings, excellent quality ......... Evo?

 Wink
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Greg Ward
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Posts: 90


« Reply #68 on: September 07, 2018, 09:25:13 AM »

Here are a few pics of the pistons I want to use from a couple of different angles.

These are just as they are out of the box with nothing done to them as yet.

As I'm sure you can see there are a few procedures that need to be done to these before I can actually use them  Wink

These weigh in with gudgeon/piston pin at 475g at the moment, as opposed to a Cofap/Mahle with pin at 530g.

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« Last Edit: September 07, 2018, 09:38:35 AM by Greg Ward » Logged
Martin S.
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« Reply #69 on: September 07, 2018, 15:17:28 PM »

Looks good! Slipper skirt with 85.5. I guess the shorter pin would help make them lighter.
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Greg Ward
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« Reply #70 on: September 13, 2018, 13:49:28 PM »

Yep 60g or so as is, but the whole top of the piston down to 0.030" or more needs to be milled off, I haven't got 4 valves per cylinder as per stock usage  Grin

Plus these are for an engine that doesn't need circlips holding the piston pin, they are press fit or some shit I don't get, so I will have circlip grooves machined in to take some spirolox pin clips.

After that, they get mocked up in the engine, and then the math occurs for the valve lift with rocker ratio and compression needs and I can work out how deep the valve pockets in the pistons need to be.

The cam with the 1.54 ratio rockers will lift to 0.59290"

Cheers,

Greg





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Greg Ward
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Posts: 90


« Reply #71 on: September 17, 2018, 09:04:48 AM »


I've done up a set of 20yr old Cofap barrels for this engine, I think they came up not too bad from throwaway to almost new again!

Cheers,

Greg


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Greg Ward
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Posts: 90


« Reply #72 on: September 17, 2018, 09:10:16 AM »


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gracey
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« Reply #73 on: September 30, 2018, 12:15:34 PM »

Looking good Greg, can't wait to see the final build.
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modnrod
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Old School Volksies


« Reply #74 on: October 03, 2018, 02:20:11 AM »

I can't wait to hear it ......  Cool
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Greg Ward
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« Reply #75 on: October 30, 2018, 09:39:15 AM »


Hi Dave,

You will hear it next year, I've been talking with Nathan Abbott who wants to run it in his Beetle in next years Australian Hillclimb Championship at Mt Panorama.

I was wondering if there was any interest in either some documentation or a Video of building this little engine once I have all the parts ready to go?

Cheers,

Greg
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Jim Ratto
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« Reply #76 on: October 30, 2018, 17:24:00 PM »


Hi Dave,

You will hear it next year, I've been talking with Nathan Abbott who wants to run it in his Beetle in next years Australian Hillclimb Championship at Mt Panorama.

I was wondering if there was any interest in either some documentation or a Video of building this little engine once I have all the parts ready to go?

Cheers,

Greg

I'd love to see your documented progress.

Jim
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DER KLEINER PANZERS

All animals are equal, but some animals are more equal than others.
(George Orwell)
modnrod
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Posts: 773


Old School Volksies


« Reply #77 on: October 31, 2018, 12:56:29 PM »

I'd love to see it, for sure!
I kinda miss the detailed step-by-step stuff, I really like the picture trail of a rebuild with a few notes, my favourite.
 Cool
Hearing that thing howl down the mountain would be very, very cool.

Good stuff Greg.
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alex d
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« Reply #78 on: October 31, 2018, 13:03:43 PM »

I think we would all love to see your work even in more detail!
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