2276 questions

[Peter]

hi guys,
i'm mocking up some parts to check the clearances

i cannot find the needed journal to bearing clear. for cb h beam rods
side clearance i'm aiming for is 0.018 inch
mains: 0.003
cam: 0.001

are these values correct?
does anybody know the stretch values of arp 2000 bolts? my rods came only with the torque specs: 15 lbs, 20 lbs, 25, final 29

thanks, Peter

[Peter]

hi guys,
after a minute of searching by my girlfriend, she found my Tom Wilson book back again;
i' ve been searching this for a week

i found the clearance for stock engines: 0.0025; is this ok for high output engines?
 i'm gonna plastgage them now

see ya!

[Peter]

hi guys,
some bad news i think..
i torqued the case to about 35Nm with the crank inside to check for drag or something..
then i turned the crank and felt a spot with some more resistance..
so i loosend the case a bit and crank is spinning fine...
i take the crank out of the case to check the bearings and what do i see?
the middle split bearing looks polished a bit on certain areas..the rest remained the same
i ll post a pic this evening
my case is shuffle pinned at that bearing, maybe something to think about? its an autolinea one
i m gonna try to check the crank for runout at work..what values should i get?

thanks, Peter

[Peter]

heres a pic..
the marks are at 1 an 7 o clock, so opposed to each other

what do you think?

greets, Peter

[Roman]

Did you use the O-rings? That is a NO-NO when you have shuffle pins, it can actually warp the case.

[Peter]

no,
i didnt use them..
case seems to be straight also;
i checked afterwards with a ruler

thanks, Peter

[LGK]

no,
i didnt use them..
case seems to be straight also;
i checked afterwards with a ruler

thanks, Peter

Hi Peter,

Check/measure your crank on the journals,then bore-gauge the linebore of the case,you want something like 0.07mm clearence.
Be sure the bearings are okay too...

Btw; your cam is ready for pick up ,if you come by at the shop bring your stuff with you we'll check out .

See ya,

Steve

[Peter]

I ll do that Steve, thanks

cheers, Peter

[stealth67vw]

Typical side clearance for a performance engine should be .010"(.25mm) or more. Most well known engine builders shoot for .016-.018"(.40-.45mm). I have read from .002-.003 is perfect journal clearance. Any less and you run the risk of spinning a rod bearings.

[Peter]

hi guys,
i boregauged the bearings when installed and torqued to 25 lbs
nr. 1 main is ok
nr.2 main: i measured at the marks and had zero clearance: 54.73 ; then i turned the boregauge 90 degrees and clearance was too much: 54.85 or something,
nr 3 main where i saw the small marks was also a bit tight maybe, i think it was 54.80 or 79

cheers, Peter

[Peter]

Hi guys,
i checked how much the dowel pegs extend out of the saddles and it was 0.25 mm less then in an as21 case i have lying around;
so i dont think the dowels are the cause..
I brought my parts to Steve, so I ll know soon what is wrong.
See ya at Volksworld!!!

[Peter]

Hi guys,
so my crank issue is solved, but now my cam is binding when i torque the case
I can see some spots where the cam seems to have touched the bearings
i measured the cam journals with a caliper, they were about 25.01 mm; i had about 0.015 mm oilclearance with plastigauge,
how much endplay should i be aiming at, because i ll have to sand the thrustbearing a bit down:
i dropped an old cam in the case and this spinned allready much better, this cam gave a lot more end play, i can hear this one  rocking, but with the new cam,
there s almost no movement possible.
I m gonna check it for runout tomorrow, and if its straight,i think i ll polish the cam journals bit by bit
What do you think?

Cheers, Peter

[Peter]

Aggrivation for sure!!
my problem was a combination of things:
main journal od oversized; probably some pinching from the shuffle pins
joy joy joy!

cya!!

[Peter]

hey guys;
so today i took some material from the cam: journals are about 24.99 mm now, so within vw tolerance
because the cam was still binding ; i started to sand the bearings at the spots where i could see the drag marks;
then i put the cam back in the case and closed the case; then turned the cam and checked again for drag..
i did this sequence more then ten times; but the cam wont free up.....
after lots of swearing; i tried something else: cam in case; case closed; the i take the cam ends with my index fingers and try to wiggle it up and down ( the case is lying with the cilinder bores facing down); and its loose as hell( in the radial sense) ; soo loose that it feels like i can move it up and down for 1 mm or something..
i dont know what to do anymore.... how is it possible that it turns so hard while i can move it up and down so much?
I m in the dark

cheers, Peter

[Roman]

It sure sounds like a warped case as have problems with both the main bearing tunnel and the cam bearing tunnel. I had a brand new Mexican case that was just like yours a couple of years ago but I switched it. Life and european summers are too short to spend weeks on a bad case.

[Peter]

hey guys,
the case is a new alu one, not filled or welded behind nr3..
an engine builder advised me to sand the cam down to 24.98 even 24.97
if it still binds ; i ll kick the f"cker out of my way
i have the green plastigauge, but dont need it yet because the cam even binds if i just put the other half on by hand
i know with todays parts everything needs additional work; but is this normal?
i dont want to put extra money in it if it wasnt needed with another case.. am i making sense or am i wrong?

cheers, Peter

[Peter]

hello;
today i made some progress;
i ll try to explain
at first, i put new bearings in the case (the two ones without thrust face)
then i layed the cam in ( i left the thrust bearing out)
installed a dial indicator on the journal without the bearing to check runout
well, i measured about 80µm runout
then i installed the thrust brearing and took the middle one out;
measured runout at the middle journal and it was about 40 - 50µm
in the end i measured runout of the journals themselves ; this was for all three about 5 µm
i think i have found a problem

cheers, Peter

[Peter]

well on jim martins page i found max cam runout is 0.02 mm,
i measured 0.08 mm:)

[Peter]

so i think the cam is not straight
but i could be wrong ofcourse

[Roman]

It is easy to measure, just put it in one case half and use a dial indicator to measure the runout.

[Peter]

well  this is what i did 
measured 0.08 runout

cheers, Peter

[Peter]

hey guys ,
i got a pic of how i measured things..
and another one 

[Peter]

 

[Peter]

hey guys!!
some additional questions:
so engine will be: 2276, web 86 c, 44 * 37 wedgeports ;..
-> now i m thinking what kind of header do i need? 1 5/8 ; 1 3/4 ? i dunno what horsepower it will make but i m sure my face will look like this after  my testdrive:
->and then which brand? i want a header that doesnt need cutting the valance and looks like the one Neal Anderson is using on his black 56.
do you guys know which oner i m babbling about? would be a great help

cheers, Peter

[Peter]

hey hey Jim!
my case and cam are back to the shop;
it should be okay if i get everything back...
the only thing that could also be wrong is the rod to journal clearance..
i didnt check this one out yet, but i hope i have some luck here
I also weighed the pistons and one is 6 g heavier than the other three...
is it safe to remove 6 g ( i heard 6 g is a lot) like in this pic?

cheers, Peter

[Peter]

hello 

[Rune]

I think Berg has the Phoenix headers back in stock..

[Peter]

Hi Dudes,
and what about the pistons? safe to remove 6 grams?

Cheers, Peter

[Zach Gomulka]

Its safe. Just dont do it all in one spot

[Peter]

Thanks man!

cheers, Peter