Mythbuster: continuing project thread of my 1303 '75

[effvee]

Originally Posted by Wally

This turbo is NOT a logical 'upgrade' for this engine!
I am sure spool is much later now, as this is a TOO large of a turbo for this engine/application. A comparable BB turbo of this size would also have later spool, but like I said before: this turbo was NOT ment for this engine, but a much larger one
Still I am very curieus what this will do on this 2.2 engine as I have so much data on this engine already.

Only if you look at a drag racing application, this turbo could do well if the cam could support the flow/rpm. For pure drag racing, the cam is not optimal either though..

As always, its a big compromise as it is.
It is tempting to completely disassemble the engine and do a cam swap, just to give it drag racing caracteristics and really let it rip at the strip
Not for now anyways, I have a hard time thinking how to install this turbo as it is

Hi Walter, I have noted your up-grades and congrats. Question, when is enough on your current engine, before you have a major failure? You have done very well, I'd hate to see you engine let loose.

[Wally]

Originally Posted by effvee

Hi Walter, I have noted your up-grades and congrats. Question, when is enough on your current engine, before you have a major failure? You have done very well, I'd hate to see you engine let loose.

I hear you! But that is also the nature of me: I'd like to improve untill I think there is no gain to be had. And imo there are still loads of thinks to improve upon and the type 4 case is much stronger than 400 hp. Swedish lunatics (and I mean this in a kind way ) have gone 600+ on the type 4 casing with a drag-race-only engine, so I think there are possibilties to extend that to track-driving with a little less hp, but for longer duration

The car itself is still very drivable too. Its not scary when you step on it, so also because the handling can handle it, I think more power is possible.
If I can keep it 'in tune' (and I am getting rather well at this, even if I say so myself), there is no reason it should break with more hp, although I am getting more and more surprised the alu cylinders keep up

Another thing to consider: this (much) bigger turbo is more gentle on the engine at comparable boost then the smaller turbo was due to lesser backpressure...
So more power at less stress for the engine! How can you pass up on that?