Single turbo BMW M4 GT4 conversion at Laguna. F8x track record set

This was the second visit out to Laguna seca with the 4N GT4 build. I am still running the stock rear F8x E diff and as you can see I am constantly fighting this car from the center off. All in all it was a great day of testing I ended up setting a new PB time. I was able set the track record for the F8x chassis 1:36.2. The GPS data was uploaded and posted on fastestlaps.com
Next year I will be testing a different tire and going with a Drexler clutch type differential. I think between those two I can shave a few more seconds off.
4N-GT4 Build specs
Bimmerworld GT-more kit
MCS 3 way suspension
Front and rear SPL control arms
GT4 AP Motorsport front lip
GT4 dry carbon canards
4N Motorsport brake cooling ducts
Sparta evolution brakes
APR GTC-300 rear wing
Hoosier R7 315 tires square F&R
Square 18x11 apex wheels
4N Built S55 engine, Carrillo rods, Mahle powerpak pistons, ported head, supertech valves, ACL bearings
4N EFR GT8474 EWG turbo kit 800hp
EOS intake manifold 700cc injectors
E85 tune by wedge Performance
4N Motorsport Custom roll cage
Sparco PRO ADV seat
4N Motorsport in tank fuel pump
4N turbo back 3.5 titanium exhaust
Steering wheel Mtrack race parts
#bmw #racing #cars #lagunaseca #turbocharged #m4 #m3 #m2 #f82 #bmwm #gt4 #driving #track

[@KirshenM3]

You guys are legends!👌 Thank you for being one the pioneers in the s55 single turbo game.🙏

[@4nmotorsport]

Thank you I appreciate the support 🤙

[@buildindian8169]

It’s called diff whine….they are using solid mounts and the car is stripped out.. I can hear the similar sound in my M3 but not so loud because I have not removed my rear seats..

[@apexholland7427]

Great build!

[@4nmotorsport]

Thanks! 🤘

[@4nmotorsport]

If you guys listen closely you can hear the diff making a metal screech sound under Accel. I think the factory clutches in the E diff are toast 😅

[@carsandcoldbrew6489]

Is it that high pitched whining sound?

[@inouske2975]

@@carsandcoldbrew6489 nope, its the metal banging sound

[@4nmotorsport]

@@carsandcoldbrew6489 between 6:14 and 6:20 you can hear it out of the corkscrew!

[@Herbotis]

@@4nmotorsport what kind of diff will you be upgrading to?

[@charlesowens8724]

yea I think it's time for a diff upgrade. I'm going with a Wavetrac diff myself on my 1 series

[@mon3yshift]

Dude I can't wait to see what you can do when you get the traction issues sorted. This thing is illegally cool

[@4nmotorsport]

Thanks man!

[@mon3yshift]

@@4nmotorsportthat 911 was insane. Do you know the specs on that thing? Are you still going to do a manual swap?

[@4nmotorsport]

@@mon3yshift Yes still in the process of doing a manual swap! I am working on making some videos and I will post the process here on KZbin 🤙

[@AhsanU]

Loved this! If I may ask - how is a single turbo vs a twin turbo on track? I'm wanting to turn my G80 M3 into a single turbo for better sound and bigger power, but all my friends are saying I'm going to hate the lag despite going for a quicker spooling turbo (PTE 6870). I'm almost at an intermediate level (IMO at least) on track and do track days solely to compete against myself and have fun - would I hate it? It looks like the F82 here is quick and a weapon, I'm sure it's also fun? Care to weigh in? Cheers!

[@sonicnofadz]

How is the front end feeling of the steering with the GTMORE setup? Can you actually feel any of the road surface through the EPS? Or is feedback about the same as stock (completely numb)?

[@bikotheanimator6169]

Intense! M4 or Supra may be my next car in the future.

[@NoBody-tz4fb]

Supra is a bmw

[@p_934]

@@NoBody-tz4fb you're so corny

[@johns.1898]

@@p_934 Doesn't make him wrong. OP is between a "BMW" and a BMW. Z4 or M4 really. The choice would be obvious to anyone that can see beyond the marketing bullshit

[@alextasarov1341]

@@NoBody-tz4fbwe know lol

[@alextasarov1341]

⁠​⁠@@johns.1898i think they are two very different options. M4 is a mostly practical more luxurious car and the supra is a lighter weight and cheaper. The supra is 200lbs less than an M2… that’s pretty good lol (and I mean the real M2 not this new ugly duckling that weighs 4000lbs with you in it).

[@neliusvantonder3607]

Awesome bro , are you still running a stock gearbox and clutches in this video ?

[@iceberglounge]

what tuning software are you using and any particular reason over other options?

[@4nmotorsport]

We are using MHD for tuning! They were the first to release single bank logic for the 02 sensors makes the 02 sensors last longer in the downpipe for single turbo conversions. Also we have been using WedgePerformance who specifically uses the MHD platform.

[@arandomperson2050]

Do you guys use factory EPS on your race cars?

[@4nmotorsport]

At the moment yes. But in the near future I am looking at installing a hydraulic power steering rack with a faster gear ratio. Stock ratio is very slow. The smaller steering wheel does help.

[@Drack19919]

Do your single turbo kits fit on a RHD f80?

[@4nmotorsport]

Hey I am not sure. We have never had a RHD car here to test fit!

[@humzazafarullah3750]

How’s the response compared to the twins

[@4nmotorsport]

With the 4N GT kit and the EFR8474 it’s very close to upgraded pure or kratos turbos. Since I kept the manifold twin scroll it really helps with response off the corner and spool up.

[@CullyColantino]

How much are you making on just 91/93 pump? I want to buy one of your systems for the F80 but my nearest E station is an hour away😅

[@4nmotorsport]

We just had a car make 630whp on 93 with just water injection. My guess on 91 octane safely would be around 550whp

[@CullyColantino]

@@4nmotorsport thanks so much!

[@benbirch2393]

​@@4nmotorsportjust water or a water/meth blend?

[@sebastianludwig3800]

Das gejaule kommt vom getriebe wa

[@lonniem397]

Keep up the awesome work!!! You should use a service such as Promo_SM!!