Buy a bike, it's the cheapest way you can get anywhere near 18k rpms (you won't really get that high but it'll be high enough).

 

The British company IES has been making a 3.4 litre VQ based race motor for many years.
It is a short stroke motor, Bore 96.5mm, 77.4mm stroke and has peak HP of 480-500 @ 9500rpm and 310f/lb's of tq @ 7500rpm. This output is achieved with a 44mm inlet restrictor.
The motors were (are) used in ALMS & Grand AM racing.

The current 2010 Formula Renault 3.5 V6 race series motor produced by Solutionf in France, uses a closer to stock VQ35DE based motor. Stock bore & stroke of 95.5 x 81.4 & useing the Nismo high strength steel crankshaft.
Its output is 425BHP @ 8200 with 295 f/lb'sTq @ 7k & a maximum rev limit of 8500

All these figures are @ the crank not rwhp

To the best of my knowlage there is no NA VQ motors running higher revs than these.

AER another English race engine builder lists a high output VQ35 based race motor but I am unable to get the output & rpm details

 

Call and talk to Fontana Nissan, they have a 450hp NA 350Z, they say its around $50k to build a motor like that. More into about it in the Racing section under Nissans in Redline time attack.

 

+1

 

i've had my de to 8500.

supercharger became horribly inefficient aftet 7500 rpms so no point. Here in a few weeks with my new turbo setup it should be good up to 8500. I think hal has his in the high 8k range.