[Walked U]

Originally Posted by 335i4u2nv

i'd love to see a n54 with a gt40 on it or even a 60-1! id love to have power up top instead of this midrange crap. I guess ive been driving too many jap cars so im addicted to top end. lol i miss my 4g63 with 60-1... nothing like 500hp at 9500rpm! lol again on a built motor and 110 octane and meth injected. hehehe

Thats a huge turbo, the graph would probably look very peaky.

I would like to see a twin gt28 or even 25.

kkk24 would be nice too.

[335iheLLraiseR]

Originally Posted by Walked U

Thats a huge turbo, the graph would probably look very peaky.

I would like to see a twin gt28 or even 25.

kkk24 would be nice too.

even with those turbos, i don't see how high we can go with a cylinder pressure of about 10.5, which is ridiculously high.

[Walked U]

Originally Posted by 335iheLLraiseR

even with those turbos, i don't see how high we can go with a cylinder pressure of about 10.5, which is ridiculously high.

Theres a lot of cars running stock 12.1 compression ratio with turbo upgrades making big HP.

A couple of them that come to mind are HPF e46 m3, and the ls2 gto with twin gt35 turbos. Thats with stock internals, ect.

[LACA335i]

Originally Posted by 335i4u2nv

i'd love to see a n54 with a gt40 on it or even a 60-1! id love to have power up top instead of this midrange crap. I guess ive been driving too many jap cars so im addicted to top end. lol i miss my 4g63 with 60-1... nothing like 500hp at 9500rpm! lol again on a built motor and 110 octane and meth injected. hehehe

gt40 will be super lag cause it is too big.. the close turbo without that much lag is Garette gt35r..However, the Garette gt35r need to modify.. the trim will need to increase to 101mm ( exchaust ) in trim and .82 a/r. the closest garette turbo would be about 740902-5 (part number),


Here is a helpful formula to pick up nice turbo with little bit of lag time with huges power.


VE base on 2 valve per cyclinder = 80 -85 %
4 valve per cyclinder = 90 %

to convert Liter to cubic in ( Liter x 61 )
To convert cubic to liter ( Liter / 61 )

1 st To find out what is your PRessure Ratio ( 14.7 (strok) + Boost (psi)) 14.7(strok) =
2nd get your cfm: CFM = CID X RPM X VE (volume efficiency) x PR ( pressure Ratio) / 3456.
3 rd CFM into lb/min = CFM /14.27 = lbs /min
Finally you need to place a dot on your turbo map. Target point would be in the center of the ring

Sample, Lets calculate CFM for a 4 valve 3.0 L and 183 cubic inches. Max power at 6400 RPM. You want to boost to 10 lbs.

1st PR (14.7 + 10 ) / 14.7 = 1.68
2nd CFM = 183 ci x 6400 (RPM) x .90 (%) x 1.68( pr) / 3456 = 516
3rd 516 /14.27 = 36.97 lb/min


Conclusion it is perfect turbo for your car.
Rule of thumb plot a dot on lb/min ( horizo) and plot a dot on your (vertical). Make them intersect each other like this +
Rule of thumb whenever it intersect each other. anything on the left from the center ( smallest oval shape) is too big, anything is from the right from the center ( smallest oval shape) is too small.

here is an sample of Turbo map look like.. ( the smallest oval ring within oval ring is your target) anything within that oval. you should get little lag.

[Dr_Dirt]

does anyone know what make and model turbo the 335 uses?

[335iheLLraiseR]

Originally Posted by Walked U

Theres a lot of cars running stock 12.1 compression ratio with turbo upgrades making big HP.

A couple of them that come to mind are HPF e46 m3, and the ls2 gto with twin gt35 turbos. Thats with stock internals, ect.

good point, but remember that the stock internals from an e46 m3 are not even comaprable to the N54. I'm not trying to cause a debate, just pointing out a couple of things. the ls2 gto is a good example though.

[Walked U]

Originally Posted by 335iheLLraiseR

good point, but remember that the stock internals from an e46 m3 are not even comaprable to the N54. I'm not trying to cause a debate, just pointing out a couple of things. the ls2 gto is a good example though.

I totally understand.

Stock internals making that much power is most likey on borrowed time. Its hard to run at 200% over stock power and except everything to work properly as the day you bought it from the dealer.

[335iheLLraiseR]

Originally Posted by Dr_Dirt

does anyone know what make and model turbo the 335 uses?

i think mitsubishi...don't know what model though.

[VQMotoring]

Originally Posted by 335iheLLraiseR

i think mitsubishi...don't know what model though.

I belive they are TD03

[e.n335]

Originally Posted by VQMotoring

I belive they are TD03

Mitsubishi TD03-10T

[Dr_Dirt]

Originally Posted by e.n335

Mitsubishi TD03-10T

Is it possible to get a flow map for it?

[335iheLLraiseR]

Originally Posted by e.n335

Mitsubishi TD03-10T

weren't these the turbos that were in the eclipse spyders back in the day? i never had one, but the model number sounds familiar.

[A418t81]

Originally Posted by 335iheLLraiseR

weren't these the turbos that were in the eclipse spyders back in the day? i never had one, but the model number sounds familiar.

No, the turbo on the BMW is unique to it.

[Gen_E92]

I think for 2008 BMW put slightly different turbos in the 335i because of some minor issues. A local member had his turbos replaced with the new ones bc the old ones are leaking, he said the new ones are smoother, not sure about power though.

[BMWnation]

Originally Posted by shiv@vishnu

FWIW, we've been running this around for the last 5 weeks. I've driven it. Dustin has driven it. Even a few customers have used it as a "loaner" for a few days at at time. We knew it was fast. We just didn't know it was making that much power.

catm3-- The PROcede map we are using is very similar to the v2.0.2 map that we will be posting up later this week. It is even running the exact same default torque values (80-90% in the low end/midrange and 100% above 6000rpm). We did make some changes to account for the extra octane, among other things. FWIW, we are controlling another engine function right now (more than just boost, afr target and timing). We have yet to determine if its necessary though. If it is, it'll be a simple firmware/wire loom update. If not, not. We still have more testing to do.

shiv

So how much power we are looking at with 93 octain???
And for people who can only get 91 oct what numbers will they be seeing?

Thanks

[JmanE55]

Congrats Vishnu.

[hotrod2448]

Originally Posted by 335iheLLraiseR

weren't these the turbos that were in the eclipse spyders back in the day? i never had one, but the model number sounds familiar.

They were on some Volvo's (i believe) and some of the sport bike guys use them to turbo their bikes.

[OpenFlash]

Originally Posted by sflgator

So why are a couple AA XEDE guys saying their custom tuned AA XEDE 335i's are seeing max HP @ redline? Just out of curiosity.

Dyno graphs?

[e90AW335i]

Originally Posted by BMWnation

So how much power we are looking at with 93 octain???
And for people who can only get 91 oct what numbers will they be seeing?

Thanks

+1 ,

[bimmermans54]

http://www.e90post.com/forums/showth...t=92694&page=3

Post #65. On a dyno dynamics dynomometer, reads less than a dynojet.
Shiv, its a rolling dyno, the rpms dont match because we didnt tap under the hood, we tried to match revs on the dyno, none the less you get the point.

[O-cha]

Originally Posted by bimmermans54

http://www.e90post.com/forums/showth...t=92694&page=3

Post #65. On a dyno dynamics dynomometer, reads less than a dynojet.
Shiv, its a rolling dyno, the rpms dont match because we didnt tap under the hood, we tried to match revs on the dyno, none the less you get the point.

They read different AND that graph is not showing power holding to red line.

[hotrod2448]

Originally Posted by bimmermans54

http://www.e90post.com/forums/showth...t=92694&page=3

Post #65. On a dyno dynamics dynomometer, reads less than a dynojet.
Shiv, its a rolling dyno, the rpms dont match because we didnt tap under the hood, we tried to match revs on the dyno, none the less you get the point.

Dude, I'm pretty sure he knows what a DD dyno is since he's only tuned countless Evos and STI's on them.

Where were you picking up tach signal then? Why didn't you base it off of speed?

Besides that your power starts dropping at the top end as well. They are all going to regardless of the tune. The stock turbos just run out of breath up there.