s63tu: Pure Stage 2 Turbos - Installed!

[135iDCT]

Originally Posted by ur20v

Pure Performance do engine kits already as well as some others if you really feel the need to 'upgrade';

https://www.pureperformancemotorspor...d-pistons.html

that's a stroker kit to 5.0, very expensive

[TheHouseWon]

Imagine the low end torque with that stroker. Goodnight, sweet DCT.

[brad850csi]

That will result in taking the stroke up to 100mm from 89.3mm, assuming as close to but not over 5000cc (4977cc)

That is a big change and I wonder if that is necessarily the best idea.

The same place just sells rods and pistons too


https://www.pureperformancemotorspor...d-pistons.html

https://www.pureperformancemotorspor...ting-rods.html

[momos750]

Originally Posted by brad850csi

That will result in taking the stroke up to 100mm from 89.3mm, assuming as close to but not over 5000cc (4977cc)

That is a big change and I wonder if that is necessarily the best idea.

The same place just sells rods and pistons too


https://www.pureperformancemotorspor...d-pistons.html

https://www.pureperformancemotorspor...ting-rods.html

+1

Not sure a longer rod ratio is the best idea for a high revving, high boost application.

At 18k that's a lot of cheddar for a rotating assembly!!

I'd like to see some engine dyno's of that setup from Pure. I'm sure they have developed and tested it but it would be great to see some real world results.

[brad850csi]

Just did a calculation online and the piston speed ends up being about the same as the S54 with it's 91mm stroke at 8k rpm as this s63tu50 design. So not completely into unknown territory as far as piston speed goes (and plenty of people boost the S54 and make 800hp M3's) but I wouldn't be keen on being the first person to try it without knowing a lot more back story.

They do sell a bunch of stroker options though for BMW engines if you check through their site, so it doesn't appear to be their first day doing this!

[IANNUZZI]

Originally Posted by gmd2003

The pistons are cast ...... Only a matter of time .

Why would you worry about the stock Mahle pistons if there is no detonation?

[gmd2003]

Originally Posted by IANNUZZI

Why would you worry about the stock Mahle pistons if there is no detonation?

Do you really think there is zero detonation at 25-26 psi stock compression ?? I don't think so .Thats why there is no pump gas tune for the turbo upgrades .

[ur20v]

Note, I wasn't validating the stroker or any of the kits at Pure, I was just pointing out there are already build kits etc out on the market.

Also note a supercharged engine puts less strain on the rotaing mass from accelartive loads which max at TDC as the boost acts as a cusion. Also the S63 isn't a high reving engine, where 8,500 with bigger displacement is quite normal, its just for a turbo it rev's higher than is 'normal', this is for marketing because you can make all the torque you want at very low low rev's and a totally flat torque curve if you want... M-car drivers just wanted a few extra rev's to show this is a 'special' engine.

[IANNUZZI]

Originally Posted by gmd2003

Do you really think there is zero detonation at 25-26 psi stock compression ?? I don't think so .Thats why there is no pump gas tune for the turbo upgrades .

Who in their right mind would run pump gas alone at 25-26psi? They would be begging for a new motor....

Assuming ideal a/f There is no detonation at 25-26psi running 100+ Or equivalent.

[gmd2003]

Originally Posted by IANNUZZI

Who in their right mind would run pump gas alone at 25-26psi? They would be begging for a new motor....

Assuming ideal a/f There is no detonation at 25-26psi running 100+ Or equivalent.

Even with 100 octane there is some detonation , running race gas and meth is a way to mitigate it .

[allmotor_2000]

There is detonation even at 20psi depending on gas. Read your plugs - they are the tell-tale for all!

Now pre-ignition is the rod-breaker... you don't want that!

[RPiM5]

Originally Posted by IANNUZZI

Who in their right mind would run pump gas alone at 25-26psi? They would be begging for a new motor....

Assuming ideal a/f There is no detonation at 25-26psi running 100+ Or equivalent.

Agreed. I actually filled up with 100 Octane just for fun yesterday. I stumbled upon a gas station selling it. Even so, as a daily driver I only run Map 1 on the JB4 with all of the mods combined (flash tune, jb4, meth, Stage 1 turbos) as it only adds 4-5psi for every day use. It's not like people who get all this stuff have to max out boost 100% every single day and run 30psi going to the grocery store. That's why the JB4 is so great, it lets you choose what u want.

I'm going to the dyno soon, but I'm guessing even with Map 1 setting the car is still over 700whp which is plenty for street use. I'm also planning on changing out spark plugs and coil packs at much shorter intervals in the future. Like Ram said spark plugs condition will give good indication of how everything is doing.

[allmotor_2000]

Originally Posted by RPiM5

Agreed. I actually filled up with 100 Octane just for fun yesterday. I stumbled upon a gas station selling it. Even so, as a daily driver I only run Map 1 on the JB4 with all of the mods combined (flash tune, jb4, meth, Stage 1 turbos) as it only adds 4-5psi for every day use. It's not like people who get all this stuff have to max out boost 100% every single day and run 30psi going to the grocery store. That's why the JB4 is so great, it lets you choose what u want.

I'm going to the dyno soon, but I'm guessing even with Map 1 setting the car is still over 700whp which is plenty for street use. I'm also planning on changing out spark plugs and coil packs at much shorter intervals in the future. Like Ram said spark plugs condition will give good indication of how everything is doing.

I have run map 8 additive 75 (peak 28psi) daily driver... to the grocery store :-)

[RPiM5]

Originally Posted by allmotor_2000

I have run map 8 additive 75 (peak 28psi) daily driver... to the grocery store :-)

That's cause you are next level. Lol!

[IANNUZZI]

I run 94 with ethanol in it, do not see any timing pull at 19-20psi even when hot outside ....

[m5james]

Originally Posted by RPiM5

Agreed. I actually filled up with 100 Octane just for fun yesterday.

How did that feel to the butt dyno? I'm looking into a simple meth kit and the thought crossed my mind that just running a tank of higher octane would likely give me a similar result as to what I might be able to expect.

[m5james]

Originally Posted by IANNUZZI

I run 94 with ethanol in it, do not see any timing pull at 19-20psi even when hot outside ....

I've read that someone was adding like 3 gallons of E85 at the end to make a full tank...are you doing the same?

[IANNUZZI]

Originally Posted by m5james

I've read that someone was adding like 3 gallons of E85 at the end to make a full tank...are you doing the same?

We have 94 octane gas with 15% or so ethanol in it....

[m5james]

Unless going to specific gas stations that charge extra for ethanol-free, we all have 15% ethanol in our gasoline...I'm missing the point of your post. Once again, there was someone who was purposely adding extra E85 to run different timing, but I'm guessing that's not you.

[MpowerMike]

Any updates on the stage 2 pure turbos? Website doesn't show them . Don't know if I should just go with stage 1 instead.

[ARC550]

Originally Posted by m5james

Unless going to specific gas stations that charge extra for ethanol-free, we all have 15% ethanol in our gasoline...I'm missing the point of your post. Once again, there was someone who was purposely adding extra E85 to run different timing, but I'm guessing that's not you.

I run e85 for more timing = more boost = more power = safer*

[PeterPure]

Originally Posted by MpowerMike

Any updates on the stage 2 pure turbos? Website doesn't show them . Don't know if I should just go with stage 1 instead.

You can pm or mail me for more info if you need. Peter@pureturbos.com

They are indeed not in the website yet but available for purchase.