Supercharged K20a2 Vtec - Race Spec by cptkirk

4 minute(s) of a 377 minute read

Rotrex will net you nice peak power numbers but power ends up right at the top of the rev range, if you're racing then great to have it up there but for daily drive I'd look more to the Roots, the newer TVS from Magnuson are aimed to produce power a bit higher in the rev range but the power curve will be mostly flat, with a slight rise, rather than constantly rising like a Rotrex.

It all depends on how you like your power delivered, mine currently has a pretty flat torque curve so the power feels pretty constant through the rev range. Having good torque lower down is nice for overtaking on normal roads as you know exactly whats coming......no massive boost (turbo), not waiting for PSI/torque to build with revs (Rotrex)....but some people like it like that.

2-7-2019

Intake manifold casting finally arrived
 
Its been a while since posting, been turbo busy doing an extension on the house and anyone that has done one can tell you it is all consuming and unfortunately I am not even near completion.
 
Yesterday the fruits of my 3D designing labour came to fruition when I received my own intake manifold to strap my supercharger too. Jose at Mercracing also bunged in a manual tensioner that we designed a few years back. As suspected the casting looks identical to the 3D print I made of it early last year. It's taken quite a few rounds of changes to get it all where it is today and I am hoping for good thigns from it. My only problem now is finding the time to do anything with it.
 
These kits can be purchased from Mercracing in the US (Pro-Street Kit) and can use a whole host of different superchargers, from the JRSC (Eaton M62) that I have in mine currently, a CT Engineering (Eaton M62 different body), Magnuson TVS 900, 1320, 1900 & 2300 (my new one).
 
Pictures:
 
Kit all wrapped up:

Unwrapped:

Nice to see it comes with all the bolts required for the build
 
 
A few close ups:

One of the casting against the 3D print:

Inlet manifold to fit to the charger for a 90mm Throttle body, should suck some air in.....

Finally the Manual Tensioner, especially useful if you cant find a 7PK belt that's a spot on fit: