Mythbuster: continuing project thread of my 1303 '75

[kuleinc]

I love your car...

[Wally]

Thanks Oasis, Kulein

Originally Posted by Sandeep

The engine sounds mean ! How does the drive compare to the old 2.0 with the 915 ? With the bigger displacement, you should have more torque to turn the gears for the G50 (but you knew that already )

First impression is that the cam may be a little large for this combo. I have more duration (163) and 114LC than the turbo webcam 119. Throttle respons with the stock cam was better still, but it does come in much harder when you fully depress the throttle, even at only 7 psi boost I had set it on.
Unfortunately then the clutch slips from the oil leak behind the flywheel, so the engine must come out again. Very frustrating...
The cam is therefore difficult to judge by now, but large LC´s may give less cylinder pressure and I am not sure if that is good yet. Like I noticed on STF, webcam has decreaed the LC´s of the Web 119... maybe they or their customers didn´t like the negatives over the advantages of running large LC´s... Thinking out loud, maybe large LC´s are better for engines that run high CR on turbo engines...
But maybe we´re going too deep here

The CHT´s were very good btw. Nr. 3 showed just a tad over 350F when it was full boost hauling down the straight at the track. Oil didn´t even get over 85 degrees Celcius after half an hour full racing (I didn´t really spare the motor...).

Datalogs from the S60 ? How about some track video ?!?! I should really be working on my car instead of spending time on the computer ....

Sandeep

hey, you overasking here! Well, actually somebody (hey white german girl ) promised to come and tape the track day, but she didn´t show up...
Datalogs were boring again (IAT 21 degrees Celcius at a 15 degree day..) and I still havn´t been able to save a log while at the track. Since data is gathered continiously and I drove 2 hours back fron the track, previous data is autonmatically deleted. There is a on-off switch to be made, but I still havn´t gotton to that.
Long story short, nothing to show you ... You ´ll have to take my word for it

[typ4boy]

Originally Posted by Wally

Yeah, almost forget that one.
Also: it will rob a lot of power. Dyno showed otherwise...
Also: the horizontal fan will throw its belt... never happend

Wally, the myth buster.

[Wally]

This is what a track day does if your having fun...



(the curved exhaust exit is because of noise restrictions...)

[Wally]

You won't believe this...

I have a slight clutch slipping problem if the turbo came in hard (and it was only 7 psi) on the track last friday.
Pulled the engine (again...) and found a dry bell housing behind the flywheel.

So I looked at the clutch disk more closely:



Indeed: the springs hit the flywheel and caused some part/not-engaging on one side...
I probably got punished for using a VW disk with a G50 center which also gives the G50 springs (?) (although Kennedy should have known this too I suppose)....who else is crazy enough to try this huh?
Problem probably easily solved by turning down the inner part of the flywheel a bit to clear the height

[Clatter]

Pulled the engine (again...) and found a dry bell housing behind the flywheel

WhooHoo! It's not a leaking cam plug!
(Or anything else that requires a complete engine teardown)

[Wally]

My thoughts exactly!

[petevw]

Still can't believe it looked like this:



Good work Wally!

[kuleinc]

I can, cause mines been replaced from the windshield forward by PO, and both sections right below the "antenna" area are already getting rust wholes again, so I'm RIGHT ABOUT where wally was in that pic, except I haven't gotten mine apart yet...

Guess I should learn to weld and get a welder, seems worth it, I had pondered getting another body...

[Wally]

Finally, the engine and tranny are holding their fluids where they belong. After all was tried, the O-ring seal from the tranny needed to be replaced and one of the rear bellhousing plugs on the engine wasn't sealing...

But its all good now and boy, it is fun to drive again with the boost turned up a bit more It was only 7 psi at the track day and now with new oil, heads retorqued, valves adjusted and rings that have very probably seated (engine doesn't smoke at all), I tuned the PWM valve to give about 10-11 psi.
I am sure this engine will run over 6K and still make more power, at least that how it feels like.
It sure is scary though to feel/hear/see the boost come on when you're running a new engine. Today was a bank holiday over here and tomorrow everybody took the day off, so me too.
Got some more test 'n tune to carry out

[Wally]

Today I tried to get a bit above 10 psi, but the clutch is saying: "enough is enough, I am not transmitting more torque..."
Slipping at anything above 0,8 bar and you can smell it as well.
I will probably need to phone Kennedy on monday...

[ricola]

Let's face it, that's far from the worst problem you could have!

[Wally]

True, but I really was hoping to have the engine INSIDE the bug a bit longer this time...

A friend suggested a dual organic disk and floater plate set-up. Hope KEP makes that for my weird combo.

[ferfre007]

se nota que se trabajo de cero!! tiene un hermoso motor tipo4!!! excelente!!

[Wally]

Originally Posted by ferfre007

....motor tipo4!!! excelente!!

That part I understand

Gracias!