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-   -   Mythbuster: continuing project thread of my 1303 '75 (https://www.germanlook.net/forums/showthread.php?t=9953)

paul_f January 25th 2012 08:50

Hi Wally, is the water tank for water injection?

Wally January 25th 2012 14:21

Yes, actually it has 50% methanol content.

volkdent January 26th 2012 01:18

Hey Wally, I've got 100% methanol right now, any reason I should or shouldn't be running 50/50 mix?

Jason

Wally January 26th 2012 05:00

Quote:

Originally Posted by volkdent (Post 82968)
Hey Wally, I've got 100% methanol right now, any reason I should or shouldn't be running 50/50 mix?

Jason

Yes, lots of reasons not to use 100% meth.
Too much, too long explanantion with many arguments on the practicle and performance side to the why of that, sorry.
I've have come to the conclusion 50/50 is best.
YMMV ;)

volkdent January 26th 2012 22:02

Quote:

Originally Posted by Wally (Post 82970)
Yes, lots of reasons not to use 100% meth.
Too much, too long explanantion with many arguments on the practicle and performance side to the why of that, sorry.
I've have come to the conclusion 50/50 is best.
YMMV ;)

Certainly half as expensive! Thanks, I'll use distilled water then?

Jason

brookester January 26th 2012 22:12

...plus 100% is flammable.

Wally January 27th 2012 04:28

Quote:

Originally Posted by volkdent (Post 82981)
Certainly half as expensive! Thanks, I'll use distilled water then?

Jason

Yes, definately! Regular water contains salts which will block your jet(s) openings after a while.
The (non-visible) flammable part is one of the many reasons not to use 100% or even 75% meth iirc. At 50/50 is non-flammabe anymore as well. Not sure where exactly the border is, but its a moot point.

Wally February 10th 2012 08:46

Last week I took the engine apart as I wanted to have the case machined for a different cooling system (more of that later when its all worked out) and another cam to try out.

Good thing I did as all bearings and heads, pistons, cylinders were still in tip-top shape, but the rods were surely not!
http://i174.photobucket.com/albums/w...2.jpg~original

One has had a movement is 2 directions, but two others were just bend one way :D Before discussions start if this was the limit of stock rods: NO, its not; this was all caused by boost-cuts of the ecu causing huge back fires that even snapped two rockers if you can remember ;)

http://i174.photobucket.com/albums/w...3.jpg~original

Fortunately Jake still had a set of slightly used Pauters, so those are underway :D

Clatter February 10th 2012 16:16

Does this mean that you got another set of 1.7-1.8 spec rods?
Or are you going to be getting a crank upgrade?

I look at those "stock" rods,
ANd there sure was a lot of nice work put into them.
Nice trophies for sure!:D

Wally February 10th 2012 17:03

Quote:

Originally Posted by Clatter (Post 83117)
Does this mean that you got another set of 1.7-1.8 spec rods?

Not yet, but these are underway :D
http://i174.photobucket.com/albums/w...s.jpg~original
Quote:

Or are you going to be getting a crank upgrade?
The nice thing about the 74mm stroker I still have is that its got the same big end journal as the 1.7/1.8 ltr 66mm crank :)
The problem is the cylinders had to be cut back very short so its doubtfull 8mm more stroke is seen as still safe for how far the pistons will come out then...
But I am sure you know what would have my vote :lmao:
Quote:

I look at those "stock" rods,
ANd there sure was a lot of nice work put into them.
Nice trophies for sure!:D
You got that right: LOTS of work went into them ;)

Xellex February 10th 2012 19:24

wow, I can't believe the rods bent so bad, that it's very visible in the pictures.. and still nothing failed.

Bradey Bunch February 10th 2012 21:38

Is the crank still straight?

Braden

Wally February 11th 2012 03:41

Quote:

Originally Posted by Bradey Bunch (Post 83122)
Is the crank still straight?

Braden

Don't know yet as I haven't got the sort of equipment to measure that myself, but crankshaft is spotless and must be straight as all main and bearings were super nice as well:
http://i174.photobucket.com/albums/w...5.jpg~original

http://i174.photobucket.com/albums/w...1.jpg~original

http://i174.photobucket.com/albums/w...9.jpg~original

NO_H2O February 11th 2012 13:59

Wow. Looks like you caught those just in time. They are wall hangers for sure.

hotsauce February 11th 2012 19:54

That coulda been messy! Good thing you tore it down!


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