Club 80-90 Forums

bigherb wrote:all the time variations in compressions would negate any differences in weight balance.

That's very good news but I'm afraid I don't fully understand how this works. Could you please explain why compression will negate the weight difference?

Thanks a lot.

Andrei

Fortunately my new pistons are all within 1g of each other. Unfortunately this means I can't use the piston weight to balance the conrod difference.

Will do more measurements and experiments this week-end. I'll let you know how difficult it is to get a conrod properly balanced.

Andrei

Very interesting topic on TheSamba, thanks for pointing it out. But I'm even more confused now because I don't know what information should I take from there. I saw they talk about 0.1g which is what I would expect from an engine running constantly at high rpm. But for these engines you have a ton o...

That is interesting. The current set I have is: 684g, 689g, 691g and 694g. I have two more sets I can't use because each one has one conrod either bent or cracked. One set is around 700g, all are between +/- 3g. The other set is in the 680g range, all +/-5g. I keep finding mixed information, none fr...

Hi, I'm rebuilding from scratch a 1.7d KY engine and just received a NOS set of conrods. I was surprised to find a weight difference of 10g between the lightest and heaviest conrods. I wasn't expecting racing grade balancing (0.1 to 0.5g diff) but from my experience with VW 1300 and 1600 engines the...

I've been away for a few days, but I'm back working on this. I don't think I'll be using an LCD. Most probably I'll have the data written to an SD card (will double as a data logger) and send it over Bluetooth to my phone. The water temperature is done. After 3 nights I have managed to properly cali...

Hi Martin, If you have no oil pressure info (except the red blinking light that says it's to late), yes, for sure there is only a switch somewhere in there. VDO has a 0-5bar sender (https://www.brickwerks.co.uk/vdo-sender-oil-pressure-5bar-0-25bar-m10x1.html" onclick="window.open(this.href...

Hi Martin, Any analog sender will do the same, the resistor inside will go up or down. Theoretically you need to measure the voltage from a voltage divider with the pressure sender acting as one of the resistors. Rounding and error corrections are needed, but it is the same process as measuring temp...

Hi guys, I was curious if anybody knows any successful projects to get an onboard computer for VW T3. Is anyone interested in such a thing? I've recently started working on one powered by an Arduino. The first phase is to read, display and record coolant temperature, oil temperature and oil pressure...

Thanks a lot, it's clear now.

I have to start researching the crankshaft, or how to get it into the best possible shape

Hi, Does anyone know the actual piston/bore size for the 1.7D KY engine? I'm looking for the correct match for the second repair oversize. That is 1mm oversize, I believe. I want to order the pistons from tornau-motoren.de and they say the size is 80.51mm. Is this the actual piston size, or the size...

I need to keep the 1.7D block due to legal constraints. I can put on the car only engines that originally came from the manufacturer. It's easy to swap a 1.7D with another 1.7D, just need to change the serial number on the papers. Putting a 1.6D or TD is a little more difficult but still possible. C...

Hi guys, I was speeding on the highway at an amazing 80km/h when a strange and loud sound came from the rear of the car. A smoke cloud followed. By the time I managed to get on the emergency lane the engine was stuck. Long story short, a valve snapped, rotated and the piston nailed it through the cy...

I'm in your spot right now. Looking for an upgrade. I've researched the T25 Caravelle seats, the most luxurious ones I believe with armrests and all. But the price is ridiculous and unless you want to keep it original, go for the T4 seats. More comfort, way more cheap and available, easy to fit. Hav...

Many, many thanks everyone.

I feel much more comfortable now.