When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
We plan to upgrade the brake system further down the line and we're currently working on a range of more in depth upgrades for the factory PCCB disc assembly to save weight, aid cooling and also add rigidity. Watch this space.
This is a work of art, like everything you produce.
We are, in the next week or two (best guess) - Some phone pics below including a comparison to the factory Weissach tips as found on the 4RS with Weissach pack
We appreciate that there will be quite a rush on them so I'm ensuring we have good stock levels (50 sets in production now) before offering them for sale via the site
JC
Will those work with a regular GT4 Race Pipe or are these for GT4 RS only? The flange looks the same to me.
At JCR we're most well known for our super high quality exhaust systems. The 718 4.0L platform has a huge amount of performance potential, most of which is locked away within the factory exhaust so when it comes down to liberating some extra speed from this car the exhaust is an 'easy' win for lap time.
We opted to install the combination of our Inconel Race Manifolds and Inconel Link Pipes (Race Catted) onto the 718 GT4 and retain the factory rear silencer SHOP PRODUCT HERE
These parts are supplied with bespoke high quality titanium hardware and each part is a direct replacement for the OEM equivalent meaning that it's possible to create a package of parts which fits your requirements more easily.
The factory exhaust is extremely restrictive, heavy and almost certainly designed to hold back the 4.0L engine to ensure the 718 GT4 / Spyder models dont give their bigger brothers too much trouble around the track.
The factory manifolds are unequal length and manufactured from mild steel and feature extremely restrictive cats.
The JCR Inconel Race Manifolds in comparison are manufactured from Inconel 625 material, featuring equal primary lengths and without cats which allows us to optimise runner lengths within the space made available.
Although bigger is certainly not always better when it comes to creating the best possible exhaust system we have also increased the size of the collector from the hyper restrictive factory dimensions to an optimised size for this specific engine / RPM / power output.
We tested a number of sizing options and found this to yield the best real world results, as proven by our v1.0 718 GT4 build where we still hold the record for the fastest accelerating car in the all important 100-200kph race. You can check out this thread here
The factory link pipes are also a big restriction from factory. Again, small diameter pipe work with highlight restrictive emissions devices, in this case the OPF which is without monitoring on US models but with monitoring on all EU models.
As our car is an EU model our car also features the OPF monitoring plus an additional exhaust gas temperature sensor.
We're working right now to further develop this specific product offering to be a direct bolt on for all EU models meaning that the OPF can be deleted with no chance of CEL. More to come on this..
A very important feature with both the Inconel Link Pipes (Race Catted) and Titanium Link Pipes (Non Silenced) that we offer is all parts include Inconel heatshielding as standard. After testing parts with and without heatshielding on track it was blatantly obvious that this step was absolutely necessary from a safety and performance stand point and hence we will not supply any of our link pipes without the necessary heat protection applied.
This combination of exhaust parts will also allow us to achieve great gains in performance plus also pass noise regulations at some of the most strictly controlled circuits in the UK where we will also install our Titanium Silenced Tips to the factory rear silencer.
This combination of parts saves -10.95kg (24.14lbs) of weight but also liberates a big chunk of performance which we will yet again demonstrate with real world acceleration numbers / top speed deltas and lap time comparisons.
The final result is a neat package which to the untrained eye might well be mistaken as a stock exhaust whilst delivering a more interesting sound and a huge increase in performance.
By no means will this be the last and final system to be installed onto the car however this combination of manifolds and link pipes will serve as a great basis to continue work on a number of new development parts which will be offered as products in the near future.
Next weeks JCR 718 GT4 v2.0 instalment brings you a behind the scenes look at a number of bodywork and aero enhancements plus a sneak peek of some our latest new product developments
Is there a reason why you did not install the race pipe with the manifolds and OAP? V1 unlocked some pretty impressive gains with the full setup. Is there an updated race pipe in the works?
Is there a reason why you did not install the race pipe with the manifolds and OAP? V1 unlocked some pretty impressive gains with the full setup. Is there an updated race pipe in the works?
We will, just first we’re completing development on our EU compatible manifold & link pipe combo (no tuning and no lights) .. Most will combine this with the factory rear silencer so it made sense to retain that for the moment
Once that package is completed we will change up the exhaust again
We will, just first we’re completing development on our EU compatible manifold & link pipe combo (no tuning and no lights) .. Most will combine this with the factory rear silencer so it made sense to retain that for the moment
Once that package is completed we will change up the exhaust again
JC
Any appetite to get dyno charts published for the different combinations? Settle that argument about the claim that the race pipe lost power in one guys dyno results. It would be good to put that to bed with some numbers on all combinations.
Any appetite to get dyno charts published for the different combinations? Settle that argument about the claim that the race pipe lost power in one guys dyno results. It would be good to put that to bed with some numbers on all combinations.
In short, not really. I did my very best to politely address and explain in the thread that was created as to why those testing results were flawed. We will, however, continue to demonstrate how ‘real world fast’ cars can be with our products installed
My background is in high level motorsport where achievements are earned on the tarmac. This is why we focus so heavily on ‘real world’ results as cars will NEVER act exactly the same on a dyno versus street / track, especially with the modern ECU’s extremely complex torque limits potentially fighting each and every change you make.
Dyno’s are great tools to aid product development but I’d much rather be setting lap records and topping GPS verified acceleration tests to prove our products work rather than sharing an impressive dyno graph.
In short, not really. I did my very best to politely address and explain in the thread that was created as to why those testing results were flawed. We will, however, continue to demonstrate how ‘real world fast’ cars can be with our products installed
My background is in high level motorsport where achievements are earned on the tarmac. This is why we focus so heavily on ‘real world’ results as cars will NEVER act exactly the same on a dyno versus street / track, especially with the modern ECU’s extremely complex torque limits potentially fighting each and every change you make.
Dyno’s are great tools to aid product development but I’d much rather be setting lap records and topping GPS verified acceleration tests to prove our products work rather than sharing an impressive dyno graph.
JC
Jonny
I cannot believe you are still defending one owner's dyno claims all this time later
To boot, as I recall, it was a simple rear box swap . . . who swaps a rear box for anything other than a change in tone and a bump in decibels?
The TQ/HP gains come from swapping out the headers/OAPs . . . and the real decibel gains to boot
Speed traces at the track under similar conditions would be good to see. It's a bit more of a logistical crapfight to swap stuff in and out but some numbers would help. I am happy with how mine sounds already, but if I can pick up a bit more performance then it starts to turn into a performance per dollar equation when selecting parts.
Speed traces at the track under similar conditions would be good to see. It's a bit more of a logistical crapfight to swap stuff in and out but some numbers would help. I am happy with how mine sounds already, but if I can pick up a bit more performance then it starts to turn into a performance per dollar equation when selecting parts.
Having the PDK car certainly adds greater consistency to this kind of testing. It goes without saying that we will share a ton of data within this thread as we enjoy and develop this car so I hope we can answer some questions and draw a line under any doubt that our products do what they say on the tin
We will, just first we’re completing development on our EU compatible manifold & link pipe combo (no tuning and no lights) .. Most will combine this with the factory rear silencer so it made sense to retain that for the moment
Once that package is completed we will change up the exhaust again
JC
This I great to hear for us living in the EU. Really looking forward to this. When do you expect this solution to be available? Keep up the good work and thank you for posting your progress 😊
This I great to hear for us living in the EU. Really looking forward to this. When do you expect this solution to be available? Keep up the good work and thank you for posting your progress 😊
Road testing under way, we just want to get through a few track events before the full sign off so most probably 6/8 weeks from now
02-11-2023, 11:36 AM
