The ULTIMATE Porsche GT4 718 Tuning Guide

[@Slick-m5p]

Great results - you should do one with stock tune with 200 cel header + over axle + backbox.

[@genomedesignporsche]

Thank you for your comment! We will keep this in mind for our next video!

[@alb3096]

I had the joy to drive a GT4 during 2 years, the dingle mods to improve the driving and performance is to reset the gearbox with shorter gearing RPM offers such improvements, after that as perfect wheel alignment is ok too. More power and torque is not needed has a single mods.

[@jamesn3513]

Great video. A must for every GT4.

[@genomedesignporsche]

We couldn't agree more!

[@davidfletcher2162]

Great to speak to you this morning Nick. Very impressed with your setup and very excited about working with you in the near future on my Cayman. All the best David

[@milkzuk]

Hello David I am sure his going to read this message LOL

[@genomedesignporsche]

Hi David! Thank you for your comment! We look forward to working on your Cayman soon! Team GD

[@seansowden8358]

Great video, Nick. Some very interesting points and a cracking end result too 👍👍

[@genomedesignporsche]

Thank you for your comment Sean! Glad you enjoyed the video!

[@Ethanf2107]

Very interesting with great explanation. Well done guys 👍🏻

[@genomedesignporsche]

@@Ethanf2107 thank you for your comment Ethan! Glad you liked the video!

[@typhoon3s943]

Great video for the uk viewers thanks !

[@genomedesignporsche]

Thanks for watching! Glad you liked the video

[@elcentinela3434]

Great video, will love to see what headers can do

[@ASAPran]

excellent video explaining increases in each every step, what makes the increase in power and torque from the tune?

[@genomedesignporsche]

There’s about 60 map changes that all work together. But in basic terms it’s ignition advance, fuel, torque requests and throttle changes

[@Peter-uu8iw]

I had this done at Ninemeister with a stage 2 tune and it pass it MOT with no problem .

[@genomedesignporsche]

⁠​⁠@@Peter-uu8iw Thanks for your comment Peter! Whilst this may have been the case for you, in large majority of cases, vehicles tend not to pass an MOT with this set up. We make this clear to our customers from a business point of view, and they may continue at their own discretion with this information :)

[@Zuffenhouse]

The stock tune + OAP dyno results are interesting. Did not expect the torque loss to be so significant at lower RPMs. From an area under the curve standpoint it almost seems like a downgrade vs stock. For a track car of course you would take the trade off. But for a street car with such long gearing, where being at 6-8k RPMs is less common, it doesn’t seem like a good modification to make.

[@meady200]

I've got this setup and depending on your point of view of course, the trade of a tiny bit of torque for a massive improvement in sound will be worth it for many. TBH the sound alone gives the impressions of a lot more power to the senses.

[@livinkold8407]

Does it affect the reliability?

[@peterbelmiro5733]

375-380whp for stock GT4 numbers. Now it makes sense that a 2.5T CGTS keeps up with it fairly well on track. I’ve seen a dyno video of the 2.5t making 365whp vs what Porsche claims is crank. A bit out of left field my comment I know, but good info this video 👍

[@genomedesignporsche]

Thank you for your comment Peter! We aim to provide our customers and viewers with real, honest information, so we're glad you enjoyed it!

[@spikes20]

Hey Nick, with no check engine with tune and OAPs will it pass MOT? Heard conflicting things if the MOT picks up on the emissions.

[@genomedesignporsche]

Hi Spencer, thank you for your comment! Due to the GPF delete pipe kit and removal of the factory OPF, the car should only be used off road and will not pass a UK MOT test unfortunately.

[@meady200]

I'm surprised it wouldn't pass an MOT. Doesn't the OPF delete make it a very similar setup to the 981 (which is obviously MOT friendly)?

[@genomedesignporsche]

From a business and legal point of view, we have to make it clear to our viewers and customers that it may not pass an MOT, they may continue at their own discretion with this information :)

[@jhrmanfield]

You say “won’t pass an MOT test”. Happy to be corrected but I don’t believe MOT testers can measure particulate emissions. As the CATs remain in place I can’t see why it should fail

[@genomedesignporsche]

We have to make it clear it's not for road use and therefore shouldn't pass a UK MOT from a legal standpoint. if it passes the *visual inspection* carried out by a tester then it's at the customer's discretion if it should be used on the road.

[@bootneck401664]

Will 100% pass mot, my car has OPF removed and passed no problem.

[@genomedesignporsche]

@@bootneck401664 As stated in our previous comment, we have to make it clear it is not for road use and therefore shouldn't pass UK MOTs from a legal standpoint. If it passes the visual inspection carried out by a tester, then it's at the customer's discretion if the vehicle is used on the road. :)

[@leesmith4215]

Never seen a tune before like this where you take the rear wheels off. My god the car was shaking like mad. Can't be good for the rear axle?

[@genomedesignporsche]

Hi Lee! This is a hub-dyno, it's what most manufacturers and higher end software calibration companies use due to its accuracy and safety in comparison to a typical rolling road. The dyno will load the car to simulate road effects. The shaking is due to the pivot point on the bottom to reduce over loading of the axel. It looks exaggerated as the car isn't driving down the road with effective downforce etc. It would almost be like applying the break at low rpm and introducing full throttle for a brief moment so it will create a large amount of load. In terms of axel loading, it is no worse than the car would experience being used for its purpose on a country road or race circuit. So the vehicle is perfectly fine! Hope this helps! Nick.

[@DanielHernandezBC]

Good video, but "ULTIMATE tuning guide?" - you only talked about deleting the GPFs - what about the other 99%?

[@genomedesignporsche]

Hi Daniel! We did cover a decent amount of other information regarding the tuning process without making the video too long! Thank you for your feedback :)

[@YachtReport]

Speaking of peak gain, your mic is peaking, reduce the gain!

[@NikonChris]

YES !

[@genomedesignporsche]

Thank you for the feedback!

[@Hypersonik]

Stop saying 'wheel horsepower'. You test the car with no wheels on and that makes a significant difference. Hub horsepower is fair.

[@genomedesignporsche]

Hi @Hypersonik! Thanks for the comment, we have always used the terminology 'wheel horsepower'. A dyno measures power at the wheels, we are using a bolt on hub-dyno which is commonly more accurate in this sense.

[@milkzuk]

How comes your getting less than 400 when I seen others punishing 410 stock?

[@genomedesignporsche]

This is at the wheels not with run down calculation for engine figures

[@swansmeister]

I'll spank that gt4 with my (tuned) base Cayman off and on track, gt4's are overrated and overpriced, not worth it.

[@genomedesignporsche]

@@swansmeister everyone has their own opinion! Please be respectful as this is someone’s pride and joy.

[@meady200]

Do your fastest lap in a tuned base cayman, then get into this and do a lap and your second lap will be quicker trust me :-)

[@genomedesignporsche]

@@meady200We currently own a standard 718 Cayman too! Although not the fastest round the track, the car is fantastic! It’s just a matter of personal preference!

[@Hypersonik]

The law of diminishing returns is apparent. The 981S represents the best bang per buck with what you can do with them.