GermanLook Forums

GermanLook Forums (https://www.germanlook.net/forums/index.php)
-   Project Builds (https://www.germanlook.net/forums/forumdisplay.php?f=67)
-   -   Mythbuster: continuing project thread of my 1303 '75 (https://www.germanlook.net/forums/showthread.php?t=9953)

70Turbobug March 19th 2011 06:31

...that was a close call! :eekno:

Humble March 19th 2011 13:14

That could have ended very badly! Hopefully you can get that turned around and get it running again soon.

Wally March 19th 2011 16:25

Yeah, did my best today to get it running next weekend. Used a ticker plate and had the divider wall protrude through the tube so I could weld it all the way through. Its 5 times stronger now 4sure and had now room to port the transitions inside the wastegate tubes a little as well :)

http://i174.photobucket.com/albums/w...derbouw002.jpg

http://i174.photobucket.com/albums/w...derbouw006.jpg

volkdent March 19th 2011 17:24

Is there any reason to go with an external wastegate vs. an internal(turbo housing)? I'm trying to keep it simple, and I can't for the life of me figure out out if the external is necessary for my project.

Jason

Wally March 19th 2011 18:04

Quote:

Originally Posted by volkdent (Post 80088)
Is there any reason to go with an external wastegate vs. an internal(turbo housing)? I'm trying to keep it simple, and I can't for the life of me figure out out if the external is necessary for my project.

Jason

Well, the really large turbo's usually don't come internal, but there are advantages if you do have a choise. Most of them are for turbo nutcases only probably, but an external gate has its own exhaust and therefore does not hinder the exit of the turbine wheel. Keeping back pressure close to zero on the downpipe (turbo exhaust side) is what this does and that is crucial to a good turbo efficiency. A little more power can be had by this.
There is also the better boost control if you have a relatively large turbo and run low-ish boost. Internal gates can be somewhat small-ish and boost creep can happen then. External gate usually flow more and don;t experience boost creep.
Thirdly you can rotate the turbine housing more freely (in all positions, 'clocking' the turbo) if you don't have the arm of the internal gate to consider, which is usually attached to the compressor housing. That makes it easier to position the turbo any way you like wrt inlet and outlet openings ;)

Wally March 28th 2011 15:34

This sunday I participated in the "Automaxx Streetpower Toyo Tires shoot-out" pfft what a name...
but it was good fun, lovely weather and good practice to get some seat time in this 1/8th mile event.
100 mile drive one way.
All went well besides terrible traction and one side of the linkage that fell off (twice...) in 2 of the 6 runs I could do. I'll deff weld the arm to the shaft now! :twisted:

First run on a cold track, cold tires and too much boost:

http://www.youtube.com/watch?v=jkntN1YTjcI

http://i174.photobucket.com/albums/w...t-outAssen.png

petevw March 28th 2011 16:06

Nice pic!

NO_H2O March 28th 2011 16:16

Can't keep a good man down for long. Good to see it back in action.

Sandeep March 28th 2011 23:08

Now that's a great picture ! Great to hear it roar again.

Sandeep

70Turbobug March 29th 2011 09:52

Sounds great Wally! You can really hear the spool up - very cool!

Wally March 29th 2011 10:55

Thx guys! It was great to be out on a track again.
Mark, where you hear it climb in the revs suddenly very soon, is where it spins the rear wheels...

Steve C March 29th 2011 18:14

Hi Wally

There was a post on here about bolt porn, the sound of your car is aural porn, love it.

Steve

Wally April 9th 2011 13:10

tnx Steve! Here's another run I found from that day:
http://www.youtube.com/watch?v=8MF7GaaDzVA

Did a new dynorun today with same sort of problem as before: running lean up top...
Its not too small injectors, but since I can log fuel pressure as of yesterday, it showed that FP gradually deminished from 3,5 bar to 2,5 bar at 1,3 bar of boost. Even though I have a boost referenced fuel pressure regulator!
Lambda was approaching 1.0 again...and misfires occured.
I even changed the fuel filter on the dyno and gave a bit more max fuel correction (30 instead of max 20% before). Even though the run didn't misfire this time, it still ran lean (lambda 0.95+ but just rich enough not to misfire and the run ended in 418 hp up top (max rpm 7200). Atm, I think its too small a wire I used for both fuel pumps.

This was at 1,3 bar. I never got to my intended 1,6 bar...

http://i174.photobucket.com/albums/w...4.jpg~original

fahrvergnugen April 9th 2011 16:16

:goodjob::clap::clap::clap:
Now get that fuel problem fixed and make a 450 run ;)

Wally April 9th 2011 16:41

Quote:

Originally Posted by fahrvergnugen (Post 80322)
:goodjob::clap::clap::clap:
Now get that fuel problem fixed and make a 450 run ;)

Yeah, that is kinda the idea Paul ;)


All times are GMT -4. The time now is 01:19.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
www.GermanLook.net 2002-2017. All Rights Reserved