Here is Leightons original post about the hybrid turbos he developed.
https://www.fiatcoupeclub.org/forum...ybrid-turbo-372bhp-329lbs-ft#Post1437877

hopefully your check is in the post...

Raced Silverstone last weekend, which was a first for me!

Unfortunately I had issues (car would not always go into 3rd gear when changing down from 4th) which compromised my pace, but I made it thought both races finishing 14th and then 12th.

One of the few passes I managed into Brooklands:
https://youtu.be/XGn9NIr6C3w

In addition to getting the gear box sorted over the winter, I really need to get to grips with the handling of the car. Power and braking are fine, but it understeers terribly and can be squirrelly on the brakes, so need to really focus on that to increase my pace.

Understeer is going to steal loads of laptime, as will brakes that don't inspire confidence.

For handling, try the following (in this order):

Front camber - 1.2-1.5 degrees for fast road and heading towards 2 degrees for track
Uprated rear anti roll bar, but be careful - go too far it it can get quite over-steery (although this can then be managed with the throttle) 23mm or 24mm max
Coilovers and cornerweighting - the Coupe (especially the 20VT) is quite uneven left to right and responds well to being properly set up.
Quaife differential - it will transform the car - as soon as you feel a bit of understeer, assuming you 've got the space, just plant the throttle and some wizardry will pull the car round. It's spooky and often makes passengers go pale / quiet...

Brakes

The standard calipers are capable of stopping the car perfectly well - don't bother spending a fortune on uprated calipers. Its all about heat management (and the 20VT is poor for this). Get some Fiat 500 695 Brembo floating discs and thank me later - they are epic. You'll also need some pads capable of handling north of 750 degrees. I swore blind by Pagid Yellow (RS-29, I think). You'll then need something good on the back, otherwise the rear will try to overtake the front unless you're braking in a perfect straight line (Coupes don't like trail braking very much...) If you can find a way to do it, rig up a cold air feed to the centre of the inside face of the front discs. It'll probably work on a track car, but I could never work out how to do it on a road car.

I spent several years and more money that I care to remember making a 20VT handle - it can be done, but it ain't cheap. The Coupe is a Fiat Tipo in a posh frock and it was never designed to perform well on track.

I documented a lot of it (albeit road biased) in this thread:

https://www.fiatcoupeclub.org/forum/ubbthreads.php/topics/1601490/coupe-handling#Post1601490