14 replies to this topic

[Brawlyrox]

OK what mods would u all suggest for me to make to my turbo?
Keeping in mind that it will be for every day use so it will have to be reliable, obviously everyday use means the boost will be kept low, but i can turn it up when i need it....

also it needs to be driveable, what would u suggesT?

I was thinking

Intercoooler
Cam
Zorst
RollerRockers
lightened and blanced flywheel
some mild head work...


Cheers

[tom]

Definatley worth beefing up the electrics. Oh, and if you plan on having it as an everyday driver, a lightened flywheel is probably a bad idea.

[Guess-Works.com]

By your list I assume your looking for performance Mods rather than ICE or glitz..

Not having ever done a turbo, I'm fishing the dark a little, but I'd go for intercooler as it seems to be stock on most modern day turbos ( even my Xantia TD's got one ). Theory is the cooler the air the more you can ram into the cylinder, and hence bigger bang..

[Brawlyrox]

yeah, ok maybe not lightened fly then.. and yeah intercooler seems a must

[1991Cooper]

Nick get a lightened flywheel, just not a ultra light one.

Even if you just converted the existing one to pre-verto, still worthwhile.

[Dan]

Nothing wrong with a lightened flywheel on a road car. A sensibly lightened and dynamically balanced flywheel/clutch can easily remove around sixty pounds of effective load from the engine in first gear. This will give greater acceleration with no ill effects. And the balancing of the whole assembly gives a much smoother tickover. Good engineers can get quite a lot of meat off of the flywheel without weakening it. Make sure you use three straps per screw hole though, and make sure the holes in the straps all line up nicely or else they won't all be bearing the load.

[Turbo Phil]

An effective Intercooler is indeed very worthwhile series 2 RST unit being a good example, i'd run a Piper Phase 2 cam or Kent 266 on 1.3 roller tipped rockers & drop the compression no lower than 8.8-1. You'll be able to run 10psi on this and it will be driveable. Lightened steel flywheel {not ultralight} can be added if budget allows, but i'd be spending most of my money on building a decent gearbox and bottom end, then adding "go faster goodies" to this.
Also another tip, remove the "poppet" valve from the carb butterfly and either solder the hole over or replace with a solid butterfly.

Phil.

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[Brawlyrox]

Phil this poppet valve has been mentioned before, what does it do and what wil blocking it do?? and as for gearbox mods would i be right in assuming a rebuild including s/c drops and a stronger diff pin are a good way to go?

Nick

[Turbo Phil]

The poppet valve has a spring on it which can become weak, meaning it stays open. This can cause problems when trying to set the mixture, also it is a fairly large restriction in the carb throat when the throttle is open, best to remove it.
You won't need a fully SC box for the spec you're planning. A "properly" rebuilt helical box with a decent twin pin diff will be up to the job, consider SC drop gears though ........

Phil. :grin:

[Brawlyrox]

ideal, cheers phil and where would you think would be best to get this uprated diff pin?

Nick

[Guess-Works.com]

Get a Tran-X cross pin diff..

[Brawlyrox]

where would i be looking to get 1?cheers

[Guess-Works.com]

I bought mine from Min-Its, think it was about 140 quid.. Tel: 01564783045

you can get similar from Minispares, and MiniSport do their own version

[Brawlyrox]

thanks

[Turbo Phil]

At the very least i would add a hardened diff pin, but if funds allow it's well worth adding a twin pin diff, the Tran-X being the "pukka" item. Give Minispares a call.

Phil. :grin: