So I originally intended the 400 kit for the built motor crowd with standalones, etc. Subiebrat hit the nail on the head with his post. I'll add to it, but really his post is perfect... He posted after I typed all this up, so I'll post it anyway!
In the case of car like my race car, Fred's XP car, Clayton's track toy, etc we have well over 400bhp. We have cams, custom tuning, good exhaust, etc. At some point, the power exceeds what you'll get in the box. However, what comes out the box isn't bad. Look at Fred's street car. In full street trim, stock compression, a good exhaust, and a nice stereo with sub, he did an 11.9 @120mph in the quarter. There's no dyno trickery in that!
That ain't bad right out of the box!
A more modified car like, Darksol did low 11s at 124mph (not a stock motor)...
As it turns out, I don't know the market well and MOST of the 400s have been going on stock
motors and/or stock compression like Subiebrat above, among many others actually.
So for stock, rather than running a 70mm pulley, *or so*, we the drop the boost back down, adjust the tune etc. For an example, there is a dyno on my website of a stock motor with stock headers, decat, and straight through muffler on the off-the-shelf Kold-fire flash tune we did that was making 307whp on 91 octane summer gas (our gas turns to crrap in the winter). Correct for a 15% power loss, that's 361bhp.
The setup obviously has the headroom for much greater numbers, as I have dyno pulls of 350whp with headers and lower compression with smaller pulley and 395whp with the addition of cams, more cooling, etc. That's about 410bhp and 460bhp respectively... Rev400
is just about right in the middle of the bhp range of what it has made.
MOST of our Rev400 clients and friends are track junkies. Some live on the track and some go just a half a dozen times a year. Certainly, the majority of kits, 400 included, are going on stock motors...
As for longevity of the motor, anyone should know it's a crap shoot when you're on the track. I can honestly say that we've had VERY good success with stock motors holding up, which is surprising! I know of a local car (a 310 kit car) that was npthing short of the "little engine that could". He had a stock oil pan, no fuel starve solution, money shifted from time to time, ran slicks, tracked on pump gas and that motor just went on and on. He never missed a track day with it. That motor sohuld have died. It never did! On the other hand, I built a motor this winter for a NA car, that replaced his stock blown motor. He had a baffled oil pan and the fuel starve fix, but a ring land broke. I've rebuilt several motors where valve stems broke for no good reason. Some of these motors do wonderfully and others don't. You tend to hear more about the latter. The same is true about transmissions!
The inconvenient truth
is that these are econobox CELICA motors that were designed to make 175
bhp and cruise down the highway at 4,000RPM. Nobody should be surprised if their stock 190bhp
Lotus engine pops while averaging over 7500RPM around a track for an extended period of time--- let alone one that makes double the intended horsepower... The good news is that the short comings of the motor are pretty cheaply and easily remedied thanks to the econobox production numbers. Econobox is bittersweet to be sure!
Hope that helps!