Small powerhouses and old school

[RMS Boxer Service]

I think it is fantastic that a professional like you lets us see your "magic". I'm trying to soak up all the info i can so I'll will be tuned for the  duration.
This is going to be one special little engine. 

I feel the same way   I'm checking this thread allmost every day to see if something new have happend.
Johannes, keep on the NICE work.


/Rolf, DK

[n2o]

Impressive number's Johannes.

Quick question, do you know the max speed of air, where port is at it's smallest?

Thanks
Roar

[K-Roc]

Impressive number's Johannes.

Quick question, do you know the max speed of air, where port is at it's smallest?

Thanks
Roar

You use a Pitot Tube to measure localized Velocity on the flow bench,

Johannes, nice work ! I have never heard of Belzonia 1111, is that an Aluminum based Epoxy of some sort? ( I use stuff called Splash Zone from Z-SPar) Reher Morrison sell it.

For your 40mm intake valve, what did you use for the Seat throat ID diameter and Bowl diameter under the seat ? I usually shoot for about 89-90% for the throat and then enlarge the bowl on the High RPM stuff.

Giving away a few secrets there LOL, ie: NOT blowing out the chamber wall to valve seat... I have seen some large increases in Flow bench numbers on heads with heavily unshrouded chambers only to suffer in actual power in real life. one of those areas that the flow bench will lie to you unless you know what you are doing

K-Roc

[yvre]

Man, what a great thread!!!

[Johannes Persson]

Hi there,

N2O:The highest speed I recorded was 356ft/s, on the short side radius close to the seat.The velocity is
        meassured at 28" of depression.

K-Roc:I use the pitot tube as a reference tool just to check velocities in different areas in the port.
         The seat ID is 90% of the valve dia and the bowl is a little bigger, not as big as I use to make
         them on an all out race engine.I have also noticed if your engine is valve restricted you can go
         as big as 93% of valve dia with very good results, the seat has then to be cut to a special shape.
         
         The Belzona 1111 is an epoxy that I really do not know wath it contains but it is for me so far
         the best I have tried, no problems to this point.I gues you can find info on the internet.


 Regards
Johannes

[Lee.C]

Man, what a great thread!!!

Just what I was thinkin dude 

[haldex201]

I think i am not gonna use my old SF heads 44/37,5 any more. JPM has take them to his flow bench and they had the worse data as the 043JPM heads.
You are a fantastisk man Johannes.
Look forward too see what data the dyno gives.

Tom V K
Copenhagen
 

[sonic]

Really find this thread interesting . Apart from a couple of engines buildt by JMR ,(thanks John), I always
tried to do the work myself . Apart from a 2165 NOS `d engine I felt for going back in time for that
"no worries "1776 cc  engine .
Yesterday I spotted 4 Carrillo rods on sale from Berg`s and that got me hooked .
So it went on with ordering a complete crank assembly, ( welded 69,)balanced and ready.
On top og this 044 heads , p&p by local man ..

As I am hoping to get the most out of this engine powerwise `good adwise on cam choice is paramount ,
I am by no means a proffetional builder but I have gone thrught  a lot of Engle Cams , only to be impressed
with 3 or 4 . Love the FK 89 , W 110 and 130.

So if anyone have any good adwise regarding  cam , compression  choice I would be happy..
I am espesially concerned about material quality these days . I just love what Johannes Person is doing ,
but without his know/how it will always be a case of trial /error for me .

Regards   

       

[Taylor]

tell me about this for small powerhouse! 101cu.in.

[Bruce]

Welcome aboard, Taylor!
Ya can't just post that without some numbers for us to fantisize about.

[Lee.C]

And alittle more info wouldn't go amiss 

[K-Roc]

Nice!

I think you may need slightly larger valve springs though 

[BeetleBug]

Nice!

I think you may need slightly larger valve springs though 

Nah... that`s the new trend you know - superlight everything. Titanium valves, carbon pushrods + + .... don`t need much pressure to make things work.. Oh, and it saves you lifters they say 

Well, back to topic - It`s been a little while since Johannes reported back and I`m really looking forward to see the progress he has made on his engine.

Best rgs
BB

[Johannes Persson]

The engine is sitting in the engine stand now, will run in cam, and comment the pictures later.


The cylinders are about 20mm shorter than std length.

The std 85,5mm pistons has a weight of 568g the JE 86mm weights only 388g, 180g lighter.


The pushrods are 254mm long, it is not unusuall to have pushrods between 275-285mm in stroker engines.

"Mouse Motor" waiting for cam brake in, only with the outer valvespring, the dual OTEVA 75 springs has 165lbs in the seat and 370lbs at 15,5mm lift.The weight of the spring is only 64g.

"Beetlbug" the header is tuned to 8000rpm as the rest of the engine, the #2 and #4 tubes will be too long if I place them in the ordonary style.

[BeetleBug]

Thank you for you update Johannes! I`m very much looking forward to hearing the theory behind the exhaust.

Best rgs
BB

[n2o]

higher rews, shorter tubes..

[Johannes Persson]

Hi there,
THE MOUSE MOTOR is alive!
The brake in prossedur of the cam went fine and now the duals are on.
Time to do some rpm..........
A small video will be posted very soon.
Everything sounds promising so far.
Regards
Johannes

[BeetleBug]

Congrats with the start up - exciting news!

Thank you for answering my question. I hope you don`t mind me babbling along regarding your header? So the header is tuned to 8000 rpms and if you used a "ordinary" header the #2 and #4 tubes would be too long. But what would be the difference if you compared your custom made header to a "out of the box ordinary" one? Lack of respons? Less hp? Less driveability?

Thanks,
BB / Kalle

[Jon]

"It's alive!!! Moahahahahaaa

<a href="http://www.youtube.com/v/VPVqYRrQBA0" target="_blank">http://www.youtube.com/v/VPVqYRrQBA0</a>

[Rune]

Great throttle respons, cool Johannes!!

[Rick Meredith]

That thing just snaps! very cool!

[Rasser]

Thumbs up!!!!!  Sounds amazing!!

Keep up the great work, it´s so exiciting to follow this build from start to finished engine.

Imagine yourself driving a big V8, stopping for a red light - and then a beetle comes up beside you and starts revving like that ;-) ;-) ;-)   thats why i LOVE hot VW´s.

[Diederick/DVK]

awesome vid!!
how come it snaps like that? is the flywheel that light?

[Lee.C]

Thumbs up!!!!!  Sounds amazing!!

Keep up the great work, it´s so exiciting to follow this build from start to finished engine.

Imagine yourself driving a big V8, stopping for a red light - and then a beetle comes up beside you and starts revving like that ;-) ;-) ;-)   thats why i LOVE hot VW´s.

couldn't have put it better myself dude - sounds AWSOME 

And D I think the light flywheel helps ALOT - I think I might drop Johannes Persson a line about my 1679 mouse motor 

[lawrence]

Very cool video clip. Thanks for sharing all of the info on the buildup. Johannes, the rocker arm assembly looks like a quality piece. Who makes it?

[folkevogn]

Awsome sound !!!Cant wait to hear it rev past 8000rpm

[Johannes Persson]

Thank you guys for your input.

Beetlebug:using a too long header will hurt the top end power, the torque curve will drop earlier in the rpm range.
               If the rest of the engine is tuned at a high rpm a too long header hurts the output a lot.

67-indeed/DVK:It is a combination between light rotating parts and good cylinder pressure that makes an engine snap.

lawrence:Thank you for asking, that is my own product I make those together with my fivestud rockers which fits on the MS230
              heads. 

The final is comming up with this project and that is ofcourse to put the "Mouse Motor" on the "bullshit detector"(dyno) and see what it makes.
Hopefully I will have time to do this in a two week period.

Regards
Johannes Persson 

[drgouk]

Awsome Johannes, You do some top work. Very interesting.

Regards

David Gouk

[Torben Alstrup]

Hello.
Very interesting heads, - among all the other stuff. I´m very interested in seeing how this turns out.
I made a set of heads with chambers  almost exactly like that, 40 X 34 valves though, and with an oval shape intake port a couple of years back, for a 1680 engine. Cam in the same duration range, but with smaller carbs.
Bottom line was that it didnt perform that well. It felt wild on the street, but the BS detector said otherwise. When it was taken apart again, the chambers showed a very inefficient plug side, judging from the carbon patterns.  I may have made a bad intake port shape without knowing it.
Johannes. If you dont mind sharing, what I/E ratio does it have with the small exhaust valve ? I´m guessing rather low.
T

[sonic]

Impressive , but 48 `s must surely be to much , !!!
Rgs