Mythbuster: continuing project thread of my 1303 '75

[spannermanager]

Originally Posted by -Alex-

Thats what i thought, finnish vw fellow with 300hp on a splitwindow also thought that torsionbars need support more than just body bolted to it

http://ub-52.blogspot.fi/ (The tubechassis car is a different project, i have designed that rear suspension.)

http://www.youtube.com/watch?feature...&v=QOrhwTLF3hA

I am thinking either cage tied to torsionbars or remmele style bars:


http://germanlook.net/forums/showthread.php?t=11601

Very nice Alex, tho I think the Remmele solution is OTT and getting heavy for anything without a 800 hp Turbo Porsche motor, I like simple and subtle solutions that are hard to spot, then you can cheat a bit lol
Walter, is your's a clutch scatter shield?

[Wally]

Alex,

Copied from my same answer in Humbles thread:

The fact I didn't weld any supports to the torsion tubes, doesn't neccesarily mean I wouldn't be better of with them...
In fact, thats probably the first other thing I will add to the existing cage as my instablity at Santa Pod in 2012 might be due to missing exactly that!

Cheers,
Walter

[spannermanager]

One way is a short blind tube bolted thro the body to the t/housing end on using the existing fixing point, say about 200mm vertical, then one down from the main hoop welded to the vertical piece, then up from there again to the diagonal, that way you get a good triangulation , plus the cage can come out if required.

[70Turbobug]

Cool comparison! The TP Heads have much more cooling fins and it seems longer ports also.The latest generation Engine Plus heads have also much more cooling fins than the previous ones.Thorsten really did a fantastic job on those heads! I´m really looking forward to this project! Hope you´ll be in Spa this year with it!

[Wally]

Originally Posted by 70Turbobug

Cool comparison! The TP Heads have much more cooling fins and it seems longer ports also.The latest generation Engine Plus heads have also much more cooling fins than the previous ones.Thorsten really did a fantastic job on those heads! I´m really looking forward to this project! Hope you´ll be in Spa this year with it!

Not to sound like a schmuck, but I can do the same comparison with a version 9 Engine Plus head as we just removed the heads from Nigel's 2,7ltr to have a look at the abused chines Nickies he runs.
We only had time today for the 3-4 cylinder side and those cylinders looked top!
Think I made a pic if your interested.

[70Turbobug]

I´ve seen the version 9 heads also.They are a big improvement compared to the first generations,mainly the casting and material,so Jan Lackstetter a few years ago.However, they do perform very well. I would like to see the chinese cylinders,thanks!

[Wally]

[70Turbobug]

Thanks Wally! They look pretty good. How many Kilometers are on them? I wonder how they would hold up under boost.

[Wally]

Dozens of hours of trackdays. And I really mean a full trackday, so hours in a row of continous 'Nigel-driving' (his foot is heavier then mine), mostly with passengers onboard as well.
Twice his V-belt of the alternator/cooling did come of and a full lap was done before noticing...the engine was soo hot, it pinged at idle...
New belt, exhaust bolts reattached (they came out because of the heat) and it started directly and went on for more laps and track days...

They have been tortured I just want to say!

[spannermanager]

Originally Posted by Wally

Dozens of hours of trackdays. And I really mean a full trackday, so hours in a row of continous 'Nigel-driving' (his foot is heavier then mine), mostly with passengers onboard as well.
Twice his V-belt of the alternator/cooling did come of and a full lap was done before noticing...the engine was soo hot, it pinged at idle...
New belt, exhaust bolts reattached (they came out because of the heat) and it started directly and went on for more laps and track days...

They have been tortured I just want to say!

Its during 'events' like the overheat that quality stands up to be counted, cast pistons, or even poor quality forged ones would have seized or collapsed completely.

[Wally]

Yeah, I agree spanner. His heads weren't fractured either. It didn't came as a surprise that most exhaust studs and a few rocker studs were loose though...
Only after having witnessed that (his engine keeping running so well like it did after all the torture), I was confident enough to consider a set of billet heads for the street for myself. And further strengthening the believe in how important alu cylinders are in shedding heat.

[owdlvr]

Thats very impressive!

[Wally]

4,03 kg :mrgreen:

[70Turbobug]

Cool! looks like my flywheel!

[dave forder]

Hi Wally, I still can't seem to upload pictures on germanlook.net. Back in November I showed my car at the NEC Birmingham and have some pictures I would like to upload. Can I email them to you to see if you have any luck uploading them?
Cheers
Dave