What "bolt ons" bring an s52 to 300hp and what's the cost?

[kishg]

Why are you guys even indulging him? He's obviously full of shit.

+1 this is bimmerjoe's alter I bet.

[FredK]

And basics. Tell me specifically what the euro and NA 3.0L S50 have different? Take away the intake and exhaust. Leave just the block w/internals and the head. What is the huge difference? Besides the obvious dual vs. single vanos.

Euro S50B30 was single Vanos.

Euro S50B3x exhaust and intake ports are way bigger than the US offering. They dwarf the M5x head ports. I am sure there are a handful of 300whp US Spec engines running around. To improve 50 whp on these engines, and not fear the engine will reduce itself to shrapnel when pushed hard for the first time would be an engineering feat.

[BimmerTim]

Good thing I'm an engineer then, huh.

[nando]

basically everything on the euro S50 is completely different - the head, even the block, crank, bearing sizes, rods, etc. I don't think it shares a single part.

the reason it makes more power is because it was built for high RPM. the S50US was not, hydraulic lifters don't really work very well at high RPM due to bleeding out. the S50 euro has more traditional solid lifters like the S54. It also has an oiling system to support high RPM operation.

the S50 us on the other hand really is just a stroked/bored M50 - 95% of the parts are exactly the same. It's not a 300hp n/a engine and really never will be.

basically the S50US head isn't capable of generating high enough VE, at a high RPM, to produce 350hp. you would need approximately 100% VE at 8000rpm to get there. Nevermind that 100% VE is something that only a handful of engines are capable of - like the S54, and the Honda S2000. With millions of dollars in R&D and the best engineers in the world working on them.

But you're somehow going to develop the S50 US head to produce that, in your garage, on a shoestring budget. OK. I have a bridge to sell you..

[BimmerTim]

Thankfully all of those things can be made/purchased/changed pretty readily.

[FredK]

Good thing I'm an engineer then, huh.

Are you capable of extraordinary feats?

[nando]

Thankfully all of those things can be made/purchased/changed pretty readily.

sorry I edited my post. but what things can you purchase? you can buy 100% VE? are you going to buy an S50 euro motor? Because that's what you would have to do.

you're completely full of shit. I don't care if you're an engineer, you don't have any understanding on how an engine develops horsepower.

[FredK]

You can't buy 100% VE at 8000 rpm on an M5x head.

And that is what every dyno graph will tell you.

I've seen an S14 race head get pretty damn close though.

[BimmerTim]

Are you capable of extraordinary feats?

Yes

sorry I edited my post. but what things can you purchase? you can buy 100% VE? are you going to buy an S50 euro motor? Because that's what you would have to do.

you're completely full of shit. I don't care if you're an engineer, you don't have any understanding on how an engine develops horsepower.

Clearly

[nando]

Clearly

clearly what? clearly you have no response to reality?

even 300hp at the crank requires ~100% VE at 7000rpm. And it gets worse the further down you try to move that powerband.

[Farbin Kaiber]

This thread brought to you by a dubber with an early model bronzit eta.


(I only read page three, I bet the first 80 posts are not worth my time.)

[BimmerTim]

Not a dubber.

It's also not early model.

And it was an eta.

[Farbin Kaiber]

It will always be an eta with your mindset.

Two dubs and stupid ideas of how to build an e30 make you a dubber.

And, I bet it still has DB's so in my book (the only one that matters) it's still an early model.

[nando]

hey, lay off the guy, he's somehow going to find magic pixie dust to circumvent the basic physics required to change an S50's sub-90% VE at peak power to over 100% some 2000rpm higher.

it's even worse because I thought he meant 350 at the crank but he means at the wheels. :rofl: a conservative estimate requires 100% VE at 9000rpm...

[JGood]

A carburetor will not get you 40whp, BTW.