Taking The 4.0T Swapped B8.5 S4 to the Dyno!

[@mercracing]

That car was a torque monster. It was just insane. Cant wait to see the new build. Definitely let the new build breathe... :)

[@mostlypostie1]

Awesome! Epic production too - keep them coming!

[@Need4Built]

Holy torque. Holy production. It’s the aero that really holding it back. You should take that wing off and hit the 1/4 mile!

[@JXBPerformance]

We think it’s the lack of top end that really held us back. At the rev limiter we’d be under 400hp.

[@DarkraiDiety]

This thing is an absolute beast. I might just have to keep my B8.5 after all and await a 4.0t swap with a 034 tune.

[@360construction9]

Love the car and the production quality of this vid 💪💪💪

[@BarbecuedPossum]

Awesome vid Jay - can't believe those torque numbers!! the donuts were sick too 😂

[@Arss-ast]

my a4 b5 goes 1/4 mile 11.4 with 1.8sec 60ft 4.3 0-60 mph , 60-130 7 sec, it is only 450 bhp, full interior only 16psi of boost

[@Tbru599]

I'm so into this journey to see where it ends up. Plus you produce amazing videos too!!

[@JXBPerformance]

All thanks to our new Creative Director Chris Flink! You can check out his personal channel Flink Films as well :)

[@ArtemLokhovitskiy]

877.... It's almost 1200 n.m. for the rest of the world. It can pull a freight train if ever needed!

[@nickcollins4599]

877 tq is wild!

[@SauqiIyus-xg2fs]

Good Morning Ser,,, suporter fans club...!!!

[@daytoncorl271]

EA837 with a turbo or EA839 with a full frame turbo. Mario is nuts😂

[@vrumvr6]

Awesome video Jay & Co! I've been sharing this a bit as it is worthy 😁

[@JXBPerformance]

Thank you!! Facebook really limits sharing videos so any help we can get is appreciated :)

[@sergioperez4465]

Whats with the fan assembly in the rear?

[@JXBPerformance]

The radiator and HX for the A2W intercooler are both mounted in the trunk!

[@olu]

Nice! Great video. More Audi content please 🙏

[@JXBPerformance]

Coming right up!

[@philbegas]

This sounds so much better than most 4.0Ts, what's the exhaust setup?

[@JXBPerformance]

It's 3" catless downpipes into a 4" y-pipe. From there back it's 4" single all the way with a single Burns Stainless Ultra Quiet 2-Stage Muffler. That Burns is the key here; it's specifically tuned to eliminate high frequencies (rasp).

[@kshugerts]

I wonder if putting bigger turbos like the rs7 +4mm from SRM would move the power curve up and take away that torque that putting lots of stress on the clutch/axles/drivetrain. Also the car will be cool with the b9 3.0T and a full frame xona ;)

[@JXBPerformance]

For sure that would help, but for us getting to the power soon as possible has been critical for autocross success. Our new engine won't be quite as torque-spikey so we'll see how things pan out.

[@whackaify]

​@JXBPerformance what's the new engine?????? 😮

[@AdrianWyrzykowski]

how am i just finding this channel now? i need a 4.0l tt in my sq5 lol

[@Alex-fo1rx]

Something does not add up. 877 torque but only 122mph? I don't understand.

[@JXBPerformance]

The torque falls off like crazy at higher rpms if you look at the dyno closely. In a 1/4 mile we wouldn’t ever even see the peak torque because we’re always way out of its range.

[@mikehood8754]

MPH is hp not torque.

[@JXBPerformance]

@@mikehood8754 to add to that. It's about hp area under the curve in the area where you're operating when doing a 1/4 mile. If power falls off above 5k rpm and you live in the 5k-7600 range during a 1/4 mile pull you're shooting yourself in the foot not shortshifting, which is exactly what I did on my couple 1/4 mile attempts...

[@zephaudi]

Makes me wanna rebuild my b8.5 a4 Lol

[@aidanhamilton9859]

Did you guys make the entire car functional? I want to do the 4.0tt in my 2013 b8.5 allroad. Trying to get info on it.

[@ciscovip1]

Have you done a track day with the car to see how it holds up?

[@JXBPerformance]

The last track day we did was back in 2018 with the previous engine. The car is too focused on trying to win the national autocross championship to risk it out on the track at this point. Maybe some day in the future...

[@Karma-wy7xv]

Those are some beefy tires! What's your set up?

[@JXBPerformance]

335/30/18 Hoosier A7 all around on 18x12s

[@michaelceklosky7911]

You didn't say it was a diesel 4.0t 😅

[@JXBPerformance]

for real lol. F***ing duramax here

[@michaelceklosky7911]

​@@JXBPerformance I am really hoping you don't take the 4.0 out of this car 😢

[@Korben007]

3.0t of sorts

[@KotaPerformance]

My guess for the new engine would be a VR6 🫢 when do we find out?!

[@JXBPerformance]

Should have more to share in the next month or so!

[@mansochannel9199]

Probably swapping a 3.0t from a b9 :/

[@Arss-ast]

where is rmp on your graphics? when your turbos spools? you showing just a numbers

[@JXBPerformance]

You can see it on the plots at the bottom. Max power at 44450 rpm. Max torque at 3400 rpm.

[@Arss-ast]

@@JXBPerformance what turbos are it?

[@JXBPerformance]

@@Arss-ast just RS7 turbos

[@Arss-ast]

your car is full weight?@@JXBPerformance

[@aibarberguy3141]

Powa

[@bradenbanfield7047]

5cyl swap

[@Arss-ast]

i thought it 10 sec car

[@JXBPerformance]

If we had dynoed it before attempting the 1/4 mile runs I would have short shifted much earlier to stay in the powerband. I also had terrible 60' because I was on cold autocross street tires in 40° weather on a road. In it's current state I'm sure it's in the 10's easily just fixing any of these issues. Regardless, won't matter anymore. Getting a better engine going to make huge power. I'll be shooting to be in the 9's for sure on the new build.

[@Arss-ast]

but uors 0-60 is good, @@JXBPerformance60-130 slow, 600+ whp goes about 5 sec

[@traviscarpenter8191]

She sounds slo 😂

[@stephenEs3532]

nice