heinrich

Fabio .... I like to think your name is pronounced very French ... as in Fahb...YO ... thank you for sharing, Mon Ami

Fabio421

Lately, I've considered changing it to FLABYo. I need to slim down.

And you're very welcome. It's not everyday that someone builds a monster engine like this. Especially with so many custom made parts and also having done it all themselves. Mike has inspired us all.

Tampa 928s

Scary fast, wow what a sound!

dprantl

This is the only thing I could come up with that would be appropriate for this build:



Is this now the most powerful 928 in existence?

Dan
'91 928GT S/C 475hp/460lb.ft

123quattro

Probably getting there for naturally aspirated. Not close to a couple of the boosted ones though.

Jon B.

I've spent over an hour reading all the pages in each one of the links this thread has.

Holy Info Batman!

hacker-pschorr

Assuming 15% drivetrain loss = 750bhp

That's 107.14hp per liter!!!!!

2009 ZO6 = 72.14hp per liter
Dodge Viper = 71.43hp per liter

Lizard928

When I saw the dynosheet, and did the math I was amazed. We can all say that the heads are not the limiting factor on these engines!

123quattro

The impressive part to me is that the cam doesn't have ridiculous lift: 0.500". Two valve 7L engines making that sort of power are in the high 0.600s to get there with bad (or good depending on how you hear it) idle quality. Very impressive stuff. The flywheel/clutch is my favorite part. It's gorgeous.

Z

There are at least a couple of other 928 engines in Wisconsin that have made more, both boosted and normally aspirated. Of all the ones that I've heard of anywhere, this one is currently #2 of the normally aspirated engines.

Jadz928

Mike,
Really amazing! Just got done with the read and catchup.... wow (understatement).

Nabbed some eye candy....

Lizard928

Mike,

I am curious as to your dysump.
What size are the 2 pump sections? as well I can see you are underdriving it.

What is the ratio?

mark kibort

Very impressive, no doubt. But what about the NSX.

600rwhp, out of a 3.2 liter. 187hp/liter assuming 15% drive trainloss for 702hp, thats 220hp/liter
Sure, its a turbo, but its running and not breaking after over a full season of racing! (double stinting two classes this season) However, it has busted a axle so far this season.

mark kibort

I was just checking out the dyno. WOW! 640rwhp and 500ftlbs of torque. Looks good, and shouldnt beat up the transmission that much, although anderson has 450rwt and has busted 5th gear and 3rd a couple of times. . shift carefully, match engine speeds and you should be good to go.
How did you design the pedals. looks perfect for some heal toe action. stock pedals are terrible for that, as you have to do some contorting foot action to get proper downshifts.
why 7500rpm? why not 8200rpm. that curve is just starting to peak out at 7500rpm.

amazing you get that kind of pwer with only oversized intake valves, NO change in exhaust valves (?), and some pretty mild compression (with 1/2" lift cams ). looks like the intake is the main obstical for us.
So, what would your best guess for hp be if you put all that fancy stuff on a bone stock S4 head and GTcam? (with the 7 liter bottom end).

the entire project is impressive. Hey, you copied my cage!

mk

heinrich

As always, the scientific veracity of your overly-certain posts is FIRST CLASS!!

" Honda maintains that the power output of the Second-Gen NSX-R engine is 290 bhp (220 kW), which is identical to the stock NSX. The automotive press, however, has long speculated that the true output of the engine is as much as 320 bhp (240 kW), and that other, unpublished enhancements were made"