Horsepower Freaks (HPF) Stage 4 E46 M3 S54 turbo puts down 925 whp

Originally Posted by Sticky

This... is intriguing.

Yup, If i go ahead and do this I can make a healthy 1100whp..

Originally Posted by TaZaM3

Yup, If i go ahead and do this I can make a healthy 1100whp..

Well why wouldn't you? And would you please make this BB exclusive? I want people coming here first damn it.

Originally Posted by Sticky

Well why wouldn't you? And would you please make this BB exclusive? I want people coming here first damn it.

More money, time etc... I'm not into it like I used to be...

Originally Posted by TaZaM3

More money, time etc... I'm not into it like I used to be...

I think this way of thinking is catching on.

Agreed with that GG.

Originally Posted by TaZaM3

More money, time etc... I'm not into it like I used to be...

You can do ITTTTTT

Originally Posted by TaZaM3

Precision 76mm... Im entertaining an offer that will rebuild my turbo and will add 150hp addition to its max rating.

Going from a Cast wheel to a Billet wheel right?

that'd be one fast car taz

Originally Posted by TaZaM3

More money, time etc... I'm not into it like I used to be...

I can understand this.

Originally Posted by gringotegra

Going from a Cast wheel to a Billet wheel right?

Larger wheel, and most likely Billet.

Originally Posted by PEI330Ci

I disagree, and I'm surprised that you would say that.

It has over 600rwtq from 5500 to 8000 RPM, which is a pretty fat torque band. Match the gear ratios up, and you'll see that the shift points fall within this powerband for every gear. The only tough thing would be launching, but I think that's more an issue of driver skill than anything else. (Most people have no idea how to slip a clutch, I know you know what I mean)

That said, I have known for a long time that the "bottleneck" of the HPF systems is the flow rate of the Meth system. If they could increase the meth delivery, we'd see more power above 7000 RPM in everything from Stage 2 to Stage 4 kits. The only way I can see them doing this is by adding a second Meth stage. (The pump is pretty much maxed out with what they are doing now) On race cars, I've seen an average of 13% difference in HP between race fuel and Meth....the power is in the fuel.

Edit: The HPF kits are also probably at the limit of what a single point of meth injection can safely deliver evenly cylinder to cylinder. I think the best path of delivery for serious power would be a second fuel rail for meth and injectors mounted at the top of each runner. That's a pretty expensive project though, as the existing ECU I dont think can handle staged injection and 12 injectors. So...direct port Meth would be the more practical way to deliver the meth evenly between cylinders. Might take 2 three cylinder systems to deliver the volume for a Stage 4 car though....

I think I may scare HPF guys a little bit with my posts...they rarely respond to any of my comments. LOL I totally respect what they are doing though.

I never saw your response to what i said...

I think the powerband sucks because the cars only rev to 8000...give them another 500rpm or more and youd have more to work with... its just such a fast steep increase in power... From what ive found out to be fast you need a 3k rpm power band... i calculated the shift points on an M3 i will see if i can find them again, that will show where the car will fall at every shift it the driver of the car can ninja shift ....




I think what you say to some of the HPF guys goes right over their head thats why they never respond...

Originally Posted by gringotegra

I think the powerband sucks because the cars only rev to 8000...give them another 500rpm or more and youd have more to work with...

The S54 already has very high piston speeds due to its long stroke. I'm impressed they rev as high as they do to begin with.

When are we going to see one of these cars do a successful 1/4 run...

Ok here is the gear calculation.... i took the stock tire size 255/35/19 since that was all i had to go with..

http://www.teammfactory.com/gearcalc...&trannytype=27

So lets check it out..

1st -> 2nd shift point 4729
2nd -> 3rd shift point 5306
3rd -> 4th shift point 5920
4th -> 5th Shift point 6495
5th -> 6th shift point 6632


This was just a close rough guess on the RPM's in the graph but:



the 1->2 shift will be $#@!ty and will most likely bog, 2->3 will be kind of the same but it falls a bit higher in the power band...3->4 is much better and it gets better after that.....

So IMO the gearing + power band for the 76mm on these cars isnt ideal... if they could rev it higher say to 8500-9000 it would help out alot..

But im no expert...

Or if your a hpf owner like me. I don't give a $#@! what someone says on a forum

There has been successful 1/4 mile runs but no 10s.

The other factor for E46 M3 10 second runs is the SMG. The manual is the way to go for the strip, the SMG is a headache to launch.

Originally Posted by Sticky

The S38 is a whole different league, way more expensive to maintain but actually arguably a better turbo platform. More displacement, easier tuning, more options, etc.

The problem with the S54 is there is only one option, HPF. Nothing against them, it just hurts us as costs stay up and we don't see the competition we do in the S50 sector.

You ever post details on your S38?

Is the s54 really cheaper than the s38?

Nothing major about my s38. Its an original motor from my e28 m5, cat back exhaust, evo cam gear, cold air intake and chipped. I built headers but took them off because they seemed to choke the top end a little when paired with the cam gear so stock headers are on now. Never been dynoed but i waxed an old friends so called "fully built" e28 535i with 3.92 gears and m3 trans who claimed to "do circles around m5's and cruise at 185 mph"...lmao. After i wiped the street with him he decided to go turbo but never brought the car out again.

Trust me I know SMG are a b1tch to launch! I have not perfected it. Either I do it perfect or spin outta control. No middle ground. Lol. Some say don't use LC and just mash the pedal. When I did that the car seemed to have a second delay the go.

I haven't really tried it much.

Originally Posted by lughed

Is the s54 really cheaper than the s38?

I would say so. Many more S54's around with many more parts available.

Working in the S38's favor is you can find them in several cars that are not worth much today.

Originally Posted by lughed

Nothing major about my s38. Its an original motor from my e28 m5, cat back exhaust, evo cam gear, cold air intake and chipped. I built headers but took them off because they seemed to choke the top end a little when paired with the cam gear so stock headers are on now. Never been dynoed but i waxed an old friends so called "fully built" e28 535i with 3.92 gears and m3 trans who claimed to "do circles around m5's and cruise at 185 mph"...lmao. After i wiped the street with him he decided to go turbo but never brought the car out again.

Cruised at 185 huh? Glad you taught him some respect.

I understand nothing major is done to your S38, but I would still like to see it. Maybe make a thread in the 5 series section?