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Mats,
I do understand no need for drawing .The 75 TS manifold ports are more perpendicular to the head and the 155 one have a steeper angle or a straighter entry with less bend at the valve itself. This is why they supposedly have better flow. Your pic is perfect for comparison.
R

Mats, I would like to compare the 75 manifold to the 155 manifold. Anybody have a pic handy to upload of a freestanding manifold to make comparison.I don't understand "normal to the split plane Yes they are conical ...maybe to increase velocity a good thing for pumping more charge,pretty standa...

Mats, The exploded view shows it clearly and the photo verifies the condition well. Look at exterior of head at bottom right, it has left over grease from the steam cleaning. I'm sure it's a very tired head but that's to be expected. I just got it, so no trouble to me at all and it was fairly cheap,...

Guys, Caveat emptor! and there are always 2 sides to the story. Maybe in the future prospective buyers should request photos of parts to be sent, good ones, close ups showing true condition especially parts that are likely to be rusted. Then both parties can be protected or at least have a common st...

Michael , After fighting this site so many times only to have my post dumped. After starting over again I have discovered that when I post a reply if I type anything while an attachment is being uploaded it will dump the reply completely except for that which is typed prior to upload .THIS IS EXTREM...

Mats,
Indeed my head does have the 3 small ports for mounting the "timing variator' on the front right side of the head

Michael.
Why do I get a HTTP 404 error "cannot find this page" notice when I click on "Allowed extensions and sizes" on a post reply

Mats , I wrote: "Yes, the hole in the rear of head is where the thermostat assembly mounts, verified by the manual. Too bad it exits in the wrong direction to use on the 75TS motor as it sends the coolant to the exhaust side. All the 75TS setups... Correction 155 setups: ....I have seen have a ...

Dennis, Great pics, looks like there is plenty of meat for further porting work. Even larger valves and seats? what's the max? The thinnest section appears at the cam follower (cup) bores where there is an additional cavity opening into the follower bore. What is that cavity? Is it an oil gallery to...

Mats,
Also, I was told 155 used ignition modules mounted remotely, this correct ? That's what I mean by all electronic, I think.
We seldom get to compare the European models, sorry for the trouble.

Mats , you wrote:" As far as you know....." no quibble here. However, let me correct myself, I wrote : Right on about the exhaust cam driven distributor would be in the way when the normally sidewinder(transverse) 155 head is turned longitudingly. I meant that my 155 head has no provisions...

Some quick math..... Offset piston pin 1.75 mm Skim piston crown 1.6 mm And a 3mm 45 deg chamfer on the outside + -------------------------------------------------------------- all together will added give 1:11.5 8) there is also some more material that can be lost, as there has to made some more v...

Mats , You're saying that all TS came with V V T, Thx. The 155 head is also a TS but how was V V T accomplished or was it done differently on the 155.? I will use an 8 wire distributor off the block. Right on about the exhaust cam driven distributor would be in the way when the normally sidewinder(t...

I notice on a TS75 engine that there is variable valve timing device on front right camshaft? correct or not?. The 155 head is a much cleaner look for a TS conversion I want to do. On my 155 TS head this device V V T is not there. Why was it changed and/ or was the V V T not available on the 155?. D...

Michael, I had a long winded topic written out on site issues, I lost my internet connection and when reconnected I went to "refresh" to reestablish my new topic's connection, it dumped it all. Therefore I will not try fix anything (there are needs) on this website as this seems to a probl...