Rookie

Na rx3's are leaf, and rx2's are 4link.

I should probably justify my comment, as it's a bit douchey just saying you are wrong. The reason that compound turbos aren't the be all and end all for creating boost is because of the large amount of back pressure that they create, as well as the the fact that the small turbo robs a lot of the energy out of the exhaust gas, thereby making the large turbo even slower to spool up. I understand that you have less lag down low and that is a good thing but in the grand scheme of things you won't care about 10psi being made by a t25 when you have 30psi being made by a hx55, not to mention that the only reason that you would want 40 psi is because you are drag racing( or you have a diesel that needs 100psi, like I said this setup is good for making big boost....), and even then there are better methods for getting a drag car on boost. The reason why a true twincharge setup is awesome is because of the positive displacement supercharger, the blower means that the back pressure ratio is positive, something which you simply can't do with a turbo. This in turn means that you have better cylinder filling, can run more aggressive cams, and also it means that you have a greater resistance to knock as you don't have a contaminated intake charge.

Is it flat head or ohv?

What are you trying to achieve? 4 link is quite a lot of work so if you don't need to change then don't. A stick diff and leaf springs will out handle most cars.

I understand what is happening and it's not the same as a twincharge setup, you don't get the benefits of the supercharger so it's pretty pointless unless you want big boost.

That is a great setup if you want lots of boost, but it's not as good at reducing lag.

TBH it needs more handling now, not power, but I seem to recall it didn't do what Tom thought, but probably turned out better.

Yea, it picked up a bunch of low down torque, pretty mean. Needs more carb fettling to get the most of it though.

SPEC performance have tuned at least 1 I know of, apparently he was quite impressed, give them a shot.

I'm impressed you got it to run without one of those, well done!

I'm looking forward to the desprung and modgies update personally.

Buy good 155's? My conti's are awesome, way better than the povo spec 185's I had on before.

There is no optimal point, turning off the supercharger will only lose you power.

It depends what you want to do with this, but it seems super overkill for just about anything that we would build in out garages. I would build one like this

^ that is the key to any gearbox's longevity.

Even better, just never turn the supercharger off.

Shit looks tops Hayhole, now bring it to Nats next year!

Nice post Roman, but you missed out the fact that the ratios are awesome in them too.

I said Taupo Drome.....

Angle grinder and tidy it up it should be sweet, if you are really ham fisted with an angle grinder you could use a file for more precision, and if that is too much of an ask you could use a thread file hahaha.

This thing is so awesome, such a good noise and presence. Fully stoked with the inspection light!

I can see it taking off myself.

Cheers to everyone involved, such a mean weekend!

Are you coming Other Dave?