[bnj]

Originally Posted by jon@themshop

The stock internals can hold. Question is can the headgasket and ignition system hold up, and can the stock injectors give enough fuel for that much boost?

The stock components should be ok up to 500 crank hp.

[OC Guy]

o.0

[Moth]

Dare I use the word "cute" to describe them. It kinda sucks that the hotside is intergrated into the manifold. It would have been nice to be able to just bolt on bigger mitsu turbos with the necessary piping.

Does anyone else notice how wicked restrictive the entire pressure system looks? BMW is severely choking this car on the intake and exhaust side.

[jon@themshop]

Originally Posted by Moth

BMW is severely choking this car on the intake and exhaust side.

You should see the exhaust manifolds then on the M52TU, M54, S54, and S85 engines.

[1clean335i]

looks pretty similar to the pics I posted a while back from a 535i...

[Lee Rambler]

so obviously reports that they are td04's is wrong....

[Lee Rambler]

do tell, what's the plan? please make a kit...

[GTO2turbos]

I've never seen turbos so small before..

The good news is that it will be possible to fab of a new exhaust manifold (stainless tubular) and use larger turbos.

But, the fuel system will be the limiting factor.

[derryck]

You should see the exhaust manifolds then on the M52TU, M54, S54, and S85 engines.

Best mod I've done on my M3 so far was headers by far...short of cams or FI it's the best mod you can do to the E46 M.

[wj4]

Originally Posted by bnj

The stock components should be ok up to 500 crank hp.

Do you have any supporting claims that it can hold up to 500bhp?

Would be interesting to see a single turbo conversion.

[jon@themshop]

Originally Posted by wj4

Do you have any supporting claims that it can hold up to 500bhp?

Would be interesting to see a single turbo conversion.

Well there's a guy on Bimmerforums with an E36 328i that did 635 rwhp on stock internals, thicker headgasket, and it lasted for awhile until he broke the 700rwhp+ barrier and the stock connecting rods were bent. He also broke driveshafts, half shafts, transmission brace, and his differential. http://www.bmwturbo328.com/index.html

I'm sure the internals of the N54 engine can handle 500hp or even 500rwhp. Again the question is, can the N54 even make that amount with stock injectors and stock compression?

[hotrod2448]

Yeah, as has been said several time before the fueling is going to be an issue.

[Black Chili]

Well it seems as though we won't be blowing up the motor with those little things

[Lee Rambler]

curious how much they flow... ie what their max power capabilities are. I think we're there, and that's why we're seeing the car falling on it's face at the top end already....

[IMJUSS2NASTY]

Originally Posted by derryck

I keep telling her that size doesn't matter...

But she seems to disagree

[Cadillac Johnson]

Originally Posted by hotrod2448

Depends on what size twins. I think a 35R would be liveable on a high compression 3 liter.

A 35R is livable on a 2.0L 4cyl. It would be awesome on a higher compression 3.0L.

Originally Posted by jon@themshop

The stock internals can hold. Question is can the headgasket and ignition system hold up, and can the stock injectors give enough fuel for that much boost?

I'm sure the 335i comes with a metal head gasket being FI from the factory. I would think head studs would eliminate any chance of failure.

Do you know the fuel system will be a problem? Do you know what the stock pump flows? Do you know the injector duty cycle at various boost pressures? Has the ignition system had problems keeping up at higher boost levels? No one really knows the levels at which those things will become a limiting factor.

IF the fuel system isn't up to the task, a meth injection kit would extend its capabilities..

[ksfrogman]

Hmmmm, I wonder what's going on here.

I'm sitting at the edge of my seat.

[jon@themshop]

I know this is a bit off topic but on a built S52 engine with a lower compression of 8.5:1, a GT35R turbo can make about 530rwhp at 17psi.

The S52 engine is in the E36 M3 and stock compression is 10.5:1 and makes about 208hp at the wheels stock.

[Revlis]

Originally Posted by hotrod2448

Oh, they're so cute and little. No wonder they spool up so quickly. One GT35R would probably make a nice daily driver replacement.

OH they are Really Cute... Looks like they got washed in hot...

[zenmaster]

Originally Posted by Cadillac Johnson

Do you know the injector duty cycle at various boost pressures?

Also, do you want to go over 80-85% duty cycle? What margin is acceptable? v1 Procede is already at 80-85% according to this thread.

[jon@themshop]

Originally Posted by zenmaster

Also, do you want to go over 80-85% duty cycle? What margin is acceptable? v1 Procede is already at 80-85% according to this thread.

You don't want the duty cycle to be over 80% under normal driving conditions... at least this is true with the fuel injector inside manifold.

Not sure if direct injection systems are the same.

[hotrod2448]

Originally Posted by Cadillac Johnson

A 35R is livable on a 2.0L 4cyl. It would be awesome on a higher compression 3.0L.



I'm sure the 335i comes with a metal head gasket being FI from the factory. I would think head studs would eliminate any chance of failure.

Do you know the fuel system will be a problem? Do you know what the stock pump flows? Do you know the injector duty cycle at various boost pressures? Has the ignition system had problems keeping up at higher boost levels? No one really knows the levels at which those things will become a limiting factor.

IF the fuel system isn't up to the task, a meth injection kit would extend its capabilities..

Most people would not enjoy daily driving a 35r on a 2 liter. I know I wasn't going to do one on my Evo without building a stroker. I think for the 335 it would be a pretty good setup though.

I'm not being a dick here but, it's a little contradictory when you question what others say about what might limit the motor like they don't know anything and then throw out things like

"I'm sure the 335i comes with a metal head gasket being FI from the factory. I would think head studs would eliminate any chance of failure."

and

"IF the fuel system isn't up to the task, a meth injection kit would extend its capabilities.."

How do you know these things but, no one else is qualified to make similar assumptions?

Just because meth injection works on a port injected 4G63 does not make it a magic fix all for getting more fuel into the 335. You have no idea nor does anyone else I'm aware of how it will work on a direct injection motor. Maybe introducing fuel before the DI injects it will only make the motor more prone to detonation with the stock compression and higher boost. Until some one tries it we don't know but, I have a feeling it will not yield results as good as it has in the Evo and Grand National worlds.