Article: VTT sets S55 stock internal record at 734 whp - F82 M4 w/ VTT Stage 2 turbo upgrade

[Tony@VargasTurboTech]

We finally got around to finishing up the testing our on S55 Stage turbo's, and the results as we expected. We picked up the Stock motor S55 power record, previous it was 728, we made 734WHP, and 729WHP on two different pulls this am. We also managed to make 762WTQ on a more aggressive throttle map. Also if anyone wants to say glory pulls, here are 10 runs all above 700WHP from yesterday and this am. The 734WHP, and 729WHP runs were made on the E30 OTS BM3 map, no special tuning, the problem is the E30 scaler is too low up top, and even with PI adding a ton of fuel, we are just plain out of fuel. Dzenno gave us a map with better E85 scaler, more aggressive throttle, and 2-3 degrees less timing, it picked up the tq down low, and it pulls clean all the way up every run. The E30 OTS map is prob a little aggressive timing wise for these boost levels so we wont run it there, custom maps are always better for these levels.

As you can see car is making 500WTQ by around 3300, and 700 by 3800K. This is a solid 500+ RPM better spool than the other turbos you see on the market.

A big thanks of course To Dzenno at BM3 for the help, its fun working with him again! Also to Terry, Mike at EOS, and Bell intercoolers for the great intercooler. Not to mention the owner who let us use his car as a test bed!

There is one S55 making more power at 745WHP (11WHP more), which is a fully built motor, fully ported head, 9 second race car, and one car making more Power / TQ at 763WHP/776WTQ (14WTQ more) and its running a 100 shot of NOS. Impressive? We think so... We will be getting this car to the track, and 1/2 mile events very soon.

Specs are as follows

2015 BMW M4 DCT
Dodson Sportsman Clutch upgrade
100% Stock motor
Stock Crank hub
VTT Stage2 turbos
VTT silicone charge pipes
BMS intakes
Aftermarket downpipes
Catless exhaust
EOS V2 top mount PI manifold
PFS Double Shot LPFP Upgrade
VTT / Bell Air to Water intercooler
Custom BM3 flash by Dzenno
JB4
100% E85
Boost level 34-35 psi
Log: http://www.datazap.me/u/vargasturbot...10-12-14-18-24

[Tony@VargasTurboTech]

For comparison sake. Our built motor N54 vs Stock motor S55. Keep in mind, both these cars are using very similar turbos. Shows how much better the N54 spools, and holds power up top. The N54 is also doing that on 25 psi, the S55 is needing 35 psi....

[JasonTPG]

Congrats on the numbers looks strong.

We made 745hp 800tq on 34psi ( I would have to look back at it) with Pure Stage 2's and our built motor. The motor consists of forged rods and pistons utilizing the same compression. The only difference really would be the ported head on our end. Curious if you had any clutch slip? In 5th gear on the dyno our clutch would slip around 760-780tq, although our clutch has seen some real abuse of the years and was one of the first ones off the assembly line it may just need refreshed.

[Tony@VargasTurboTech]

Congrats on the numbers looks strong.

We made 745hp 800tq on 34psi ( I would have to look back at it) with Pure Stage 2's and our built motor. The motor consists of forged rods and pistons utilizing the same compression. The only difference really would be the ported head on our end. Curious if you had any clutch slip? In 5th gear on the dyno our clutch would slip around 760-780tq, although our clutch has seen some real abuse of the years and was one of the first ones off the assembly line it may just need refreshed.

Jason, thank you sir, appreciate the kind words. The ported head is going to make a big difference as far as flow. We picked almost 50+WHP on the N54 doing nothing but going ported head. From what I have seen these S55 motors stock flow like complete $#@!. 35 psi to make this power is indicator of that. The N54 is making 100WHP more at redline with 10 psi less boost. Turbos for all intents and purposes are the same size between both motors.The big thing with these over the Pure's if you compare graph to graph, these are picking up a bunch of bottom end, and midrange, which makes a big difference in racing scenerios, drag racing for getting out of the hole, and roll racing for the initial hit.

As for the clutches, so far so good, not issues at all. We could not even get the final learning procedure to work. I told Chuck I was just going to run the piss out of them, and see what they did. So far they are holding great!

[Terry@BMS]

Congrats!!

Couple minor suggestions looking at the log. I'd change open loop to 0, to prevent the JB4 from offsetting your fuel trims when boost is over DME BT. It's driving trims negative and AFR richer than it needs to be.

Also, set the JB4 target closer to where you want boost to be. As is the JB4 thinks you are 4psi over target which could cause problems when it comes time to take it down the track.

Also FF probably needs to come down a bit, that might be part of why boost is running over your target.

[Tony@VargasTurboTech]

Congrats!!

Couple minor suggestions looking at the log. I'd change open loop to 0, to prevent the JB4 from offsetting your fuel trims when boost is over DME BT. It's driving trims negative and AFR richer than it needs to be.

Also, set the JB4 target closer to where you want boost to be. As is the JB4 thinks you are 4psi over target which could cause problems when it comes time to take it down the track.

Also FF probably needs to come down a bit, that might be part of why boost is running over your target.

Terry, I appreciate the advice. I will look into making the changes!

[925_335IS]

Great work, can't wait to get the car to the track! Test and tune Saturday or Wednesday night if all looks good and works out!? Let's get it out and beat on it!

[Sticky]

Promoting to front page with intro paragraph:

VTT (Vargas Tuning Technologies) is mostly known on BimmerBoost for their N54 work but their S55 turbo upgrade program is getting going. Really getting going as their Stage 2 turbocharger upgrade set a new stock internal record for the S55 motor at 734 wheel horsepower and 762 lb-ft of torque at the wheels.

[Sticky]

and its running a 100 shot of NOS.

Wait a second. I asked directly about the nitrous and was told it doesn't have nitrous.

[Sticky]

Great work, can't wait to get the car to the track! Test and tune Saturday or Wednesday night if all looks good and works out!? Let's get it out and beat on it!

This is your car?

[Tony@VargasTurboTech]

Wait a second. I asked directly about the nitrous and was told it doesn't have nitrous.

The owner did not disclose it at first, and was shady about it.

[Tony@VargasTurboTech]

You got the tq backwards in the intro paragraph, you put 726, its 762wtq

[Sticky]

The owner did not disclose it at first, and was shady about it.

Which car are we talking about? If 9 second car, there is only one.

[Sticky]

You got the tq backwards in the intro paragraph, you put 726, its 762wtq

Sometimes I make typos.

[Tony@VargasTurboTech]

No sir. The 9 second car is a fully built motor, ported head etc. The NOS car was just stock motor with 100 shot. He posted the results first, and didn't say that he used NOS. Everyone questioned it, and he came clean.

[Sticky]

No sir. The 9 second car is a fully built motor, ported head etc. The NOS car was just stock motor with 100 shot. He posted the results first, and didn't say that he used NOS. Everyone questioned it, and he came clean.

Ok, cleared up.

Who is the other car who tried to cheat with nitrous?

[Tony@VargasTurboTech]

I believe Pure has the car listed in their results thread in the S55 section here.

[925_335IS]

This is your car?

Yes it is.

[ken2521]

Congrats!!! So is this saying that the n54 is still the best turbo motor BMW has built?

[Tony@VargasTurboTech]

Congrats!!! So is this saying that the n54 is still the best turbo motor BMW has built?

In my humble opinion it is. I see the TPG built S55, and power is still falling off like a rock up top. The N54 with similar sized turbos is holding 800WHP at 7K RPM. To me that shows a better flowing motor.

[hobbit382]

In my humble opinion it is. I see the TPG built S55, and power is still falling off like a rock up top. The N54 with similar sized turbos is holding 800WHP at 7K RPM. To me that shows a better flowing motor.

A little unfair to compare considering the difference in exhaust manifolds, and ported/built n54 head. Stock for stock with the exact same turbos the s55 will win. That being said your GC turbos are quite amazing.

[Tony@VargasTurboTech]

A little unfair to compare considering the difference in exhaust manifolds, and ported/built n54 head. Stock for stock with the exact same turbos the s55 will win. That being said your GC turbos are quite amazing.

Thats why I said the TPG built S55, fully built motor, fully ported head, the whole 9 yards to make the S55 flow every big as well as the N54, or better. The S55 units are very very similar to a set of GC's, yet the S55 still seems to fall on its face up top. I am not sure where the restriction is, but its got one somewhere. We wont even get into how bad the S55 sounds for god knows why....I do love the platform though, driving this M4 is fun, the car is a friggin rocket

[Sticky]

Yes it is.

Well, congrats! Glad to see you want to take it to the strip and see what she does.

[RobNyc]

Nice VTT!
What is the VTT N54 at that power level doing in a 1/2 mile or 1/4 mile so far?

[925_335IS]

Well, congrats! Glad to see you want to take it to the strip and see what she does.

Thank you! Yeah can't wait to get it out. We will see what she will do on the R888's for now. New wheel/tire package to come soon.