Stroker build

[SYT_Shadow]

Originally Posted by SYDAUSM3E92ZCP

So has this car been tracked yet with the 4.6 engine??

It has! No overheating issues! The soundtrack is to die for.

It is slightly faster than a CS and slightly slower than a GTS

Oh and this was during an infernally hot weekend, between 90 and 100 degrees from 9am on, every day... so happy to see that!!

[OG Shark]

Originally Posted by SYT_Shadow

It has! No overheating issues! The soundtrack is to die for.

It is slightly faster than a CS and slightly slower than a GTS

How does it compare to the 4.0L on the track? Two damn good cars to be close company to.

[SYT_Shadow]

Originally Posted by OG Shark

How does it compare to the 4.0L on the track? Two damn good cars to be close company to.

Sometime i have to dig up the speed plots of the 4.0L vs the CS around a known track, it is like the 4.0 is stopped compared to the CS.
To bring the E9X to have the speed of the CS is a huge change.

I'll have some more data in a couple weeks

And it also serves to remind us that if you don't care about the E9X and the NA V8, just get an M3 CS! Hehe


Edit: as a reference point:
A stock E9X loses badly to a 991 gt3 in straights. You catch them in braking and turns but then the straight comes and they disappear.
The CS is essentially the same speed in the straights than the 991 gt3, even the 991.2. This is a huge difference.
I haven't been able to compare e90 against 991 gt3 yet but eventually it'll happen

[Richbot]

jesus that means 5-7mph at the end of every straight improvement?

[SYT_Shadow]

Originally Posted by Richbot

jesus that means 5-7mph at the end of every straight improvement?

It's hard to say, i don't remember the number. The graph comparing the e90's speeds to the CS' speaks for itself but i don't seem to have it handy. I'll have to post it

Basically before the e90 was getting horizoned and now it's right there with them

The CS is really stupid fast, i can't believe this has been available since 2015 with a tune. Holy shit.
I'm now consuming an entire 28mm thick front bbk pad per weekend as well as the entire rear bbk pad. Before the rear bbk the CS ate a whole front pad in two days. 28mm!!!!

[OG Shark]

Originally Posted by SYT_Shadow

Sometime i have to dig up the speed plots of the 4.0L vs the CS around a known track, it is like the 4.0 is stopped compared to the CS.
To bring the E9X to have the speed of the CS is a huge change.

I'll have some more data in a couple weeks

And it also serves to remind us that if you don't care about the E9X and the NA V8, just get an M3 CS! Hehe


Edit: as a reference point:
The E9X loses badly to a 991 gt3 in straights. You catch them in braking and turns but then the straight comes and they disappear.
The CS is essentially the same speed in the straights than the 991 gt3, even the 991.2. This is a huge difference.
I haven't been able to compare e90 against 991 gt3 yet but eventually it'll happen

Originally Posted by SYT_Shadow

It's hard to say, i don't remember the number. The graph comparing the e90's speeds to the CS' speaks for itself but i don't seem to have it handy. I'll have to post it

Basically before the e90 was getting horizoned and now it's right there with them
-
The CS is really stupid fast, i can't believe this has been available since 2015 with a tune. Holy shit.
I'm now consuming an entire 28mm thick front bbk pad per weekend as well as the entire rear bbk pad. Before the rear bbk the CS ate a whole front pad in two days. 28mm!!!!

CS sounds ridiculously good. The E90 being there now is amazing. Always fun to chase the GT3’s down in the corners - but now having the power to run them in the straights too? That’s just damn beautiful.

What pads are you using going through them that quick?

[SYT_Shadow]

Originally Posted by OG Shark

CS sounds ridiculously good. The E90 being there now is amazing. Always fun to chase the GT3’s down in the corners - but now having the power to run them in the straights too? That’s just damn beautiful.

What pads are you using going through them that quick?

Pfc11, the same as always. That's the cost of pushing the braking zones when you have that much speed to shave off.

When you are in a 3600lb family sedan chasing down 2500lb cup cars something's gotta give!

Edit: this significant brake consumption happened with stock rear brakes and stock suspension - car was diving quite a bit. I will have more data points 2 weeks from now with front+rear bbk's and suspension settling the car and allowing for more rear brake bias.

Stay tuned!

[OG Shark]

Originally Posted by SYT_Shadow

Pfc11, the same as always. That's the cost of pushing the braking zones when you have that much speed to shave off.

When you are in a 3600lb family sedan chasing down 2500lb cup cars something's gotta give!

Edit: this significant brake consumption happened with stock rear brakes and stock suspension - car was diving quite a bit. I will have more data points 2 weeks from now with front+rear bbk's and suspension settling the car and allowing for more rear brake bias.

Stay tuned!

Formal request for video with sound...

Will be interesting to hear now much the rear bbk & less dive diminish the wear. Where you going through rotors fairly quickly too?

[SYDAUSM3E92ZCP]

Originally Posted by SYT_Shadow

It has! No overheating issues! The soundtrack is to die for.

It is slightly faster than a CS and slightly slower than a GTS

Oh and this was during an infernally hot weekend, between 90 and 100 degrees from 9am on, every day... so happy to see that!!

WOW...that's freakin' awesome!! Finally a competitive S65 that can mix it with the big boys on the straights as well!

[SYT_Shadow]

Originally Posted by OG Shark

Formal request for video with sound...

Will be interesting to hear now much the rear bbk & less dive diminish the wear. Where you going through rotors fairly quickly too?

For the CS:
The pfc rotors last a long time. It has pfc front bbk and ap radical rear. The front/rear balance moves to the rear 10% with the bbk
There is less dive for sure but i also have moved to mcs suspension with 800/1100 rates

The stroker has pfc front and rear bbk and mcs 3wr suspension so it feels incredibly well balanced. It is just fenomenal even if it's a little porky.
This has been our primary track car for years now so the stroker part is new but the rest was already there.

I don't post videos on the forum but I'm sure we can work something out

[gte869h]

Originally Posted by SYT_Shadow

Sometime i have to dig up the speed plots of the 4.0L vs the CS around a known track, it is like the 4.0 is stopped compared to the CS.
To bring the E9X to have the speed of the CS is a huge change.

I'll have some more data in a couple weeks

And it also serves to remind us that if you don't care about the E9X and the NA V8, just get an M3 CS! Hehe


Edit: as a reference point:
The E9X loses badly to a 991 gt3 in straights. You catch them in braking and turns but then the straight comes and they disappear.
The CS is essentially the same speed in the straights than the 991 gt3, even the 991.2. This is a huge difference.
I haven't been able to compare e90 against 991 gt3 yet but eventually it'll happen

What diff are you running with the stroker when comparing track times? The stock M variable is slow on response compared to aftermarket options.

[SYT_Shadow]

Originally Posted by gte869h

What diff are you running with the stroker when comparing track times? The stock M variable is slow on response compared to aftermarket options.

Stock diff, like it had before. It works fine enough

[Exclusivs]

This is pretty remarkable, just now got done reading through this entire thread. Way to make lemonade out of lemons when dealt a bad hand on the original engine. Props Danny for diving this deep, I personally know the winters can be long on the East coast and what a perfect project to have undergone during the hiatus. Have you driven any S/C e9xs (built kits 650) etc. Wonder how they translate in driving experience especially on track vs an N/A stroker. Congrats on raising the bar and a successful build out!

[SYT_Shadow]

Originally Posted by Exclusivs

This is pretty remarkable, just now got done reading through this entire thread. Way to make lemonade out of lemons when dealt a bad hand on the original engine. Props Danny for diving this deep, I personally know the winters can be long on the East coast and what a perfect project to have undergone during the hiatus. Have you driven any S/C e9xs (built kits 650) etc. Wonder how they translate in driving experience especially on track vs an N/A stroker. Congrats on raising the bar and a successful build out!

When it blew I knew I'd either get a stock engine or build a stroker out. What precipitated the stock engine is that I've driven a lot of cars on the track, from 997 to 991 GT3s, Cayman GT4s, F80s, M4 GT4s, etc and there is nothing I prefer.

I've had the pleasure of driving two ESS supercharged cars. Super impressive because they feel like NA engines but just way more powerful.
Certainly a supercharger is a much cheaper way of getting more hp vs a stroker, but for my intended use (the track) there isn't a supercharger system that could take double-session tracking without overheating.
Besides the heat, the two things I don't like about supercharging is that your front end gains 50-100lb and you lose all the intake sound, which is particularly glorious in a S65. After the cams and Karbonius the sound of the stroker is to die for.

[CSBM5]

Originally Posted by SYT_Shadow

Besides the heat, the two things I don't like about supercharging is that your front end gains 50-100lb and you lose all the intake sound, which is particularly glorious in a S65.

My first thought on an S/C is the additional load placed on the front main bearing due to the supercharger pulley hanging way out there with a high belt load. The mains surely don't need such an undesigned for and asymmetric load, especially the front most one.

[SYT_Shadow]

Originally Posted by CSBM5

My first thought on an S/C is the additional load placed on the front main bearing due to the supercharger pulley hanging way out there with a high belt load. The mains surely don't need such an undesigned for and asymmetric load, especially the front most one.

Yup, that's another factor as well

I'm not super concerned about that because not many superchargers fail, but it's something to consider.
Also, I would have followed ESS' recommendation for a tracked supercharged car and gone with the 595 kit, not the 625 or the 650. Less boost = less load

[SYDAUSM3E92ZCP]

Hey syt-shadow, have you been tracking the 4.6 much? Any further track reports?

[TomHudson]

To put in perspective, the S54 m3 had 262 lb ft torque
The S65 m3 had 295 lb ft torque

The Dinan 4,6 stroker pounds out 407....

[SYT_Shadow]

Originally Posted by SYDAUSM3E92ZCP

Hey syt-shadow, have you been tracking the 4.6 much? Any further track reports?

I have some really nice vids! Send me an email and I'll forward them

The stroker got 18 days this season. It was pretty damn fun, it is like a dream come true. It sounds so wonderful and pulls as hard as a 991.2 gt3 in straights.

[wfdeacon88]

Originally Posted by TomHudson

To put in perspective, the S54 m3 had 262 lb ft torque
The S65 m3 had 295 lb ft torque

The Dinan 4,6 stroker pounds out 407....

Not sure what this was in reference to, but I'm pretty sure this build puts the relatively disappointing Dinan stroker stats to shame.

[SYDAUSM3E92ZCP]

Originally Posted by SYT_Shadow

I have some really nice vids! Send me an email and I'll forward them

The stroker got 18 days this season. It was pretty damn fun, it is like a dream come true. It sounds so wonderful and pulls as hard as a 991.2 gt3 in straights.

Cheers syt_shadow...email sent!

[TomHudson]

Originally Posted by wfdeacon88

Not sure what this was in reference to, but I'm pretty sure this build puts the relatively disappointing Dinan stroker stats to shame.

Actually no and you’ve misinterpreted what I meant.

I was just pointing out what a difference in torque the stroker build is. Mine is the Dinan, and there are others that are varying torque and hp numbers, but with that bit of displacement, that engine comes alive.

Nobody is putting Dinan “stats to shame”, especially if you don’t have either!