JB4 test unit
- Thread starter 8YARWY
- Start date
Thanks for keeping us updated 
On my previous car, I purchased a racechip GTS Black with mobile app control, but never fitted it. I've just received a response from racechip that they can swap it out for the RS3 8Y version.
Be interesting to see if I get round to fitting it this time (once I get the RS3 variant)
On my previous car, I purchased a racechip GTS Black with mobile app control, but never fitted it. I've just received a response from racechip that they can swap it out for the RS3 8Y version.
Be interesting to see if I get round to fitting it this time (once I get the RS3 variant)
Straight to a jb4, no jb1 first like on the 8v s3? , interesting. From when I had one on my s3 really rate them, be looking to get one for my upcoming RS if alls wellFinally received my JB4 testing unit today….
Been a delay on this whilst the wiring was checked, apparently something on the 8Y is different to the OPF 8V.
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Had a JB4 on my Daza engined RS3.
Made an around extra 40 hp and 54 ft-lbs over the standard figures when on the RR at Unicorn in Stockport with map 3.
Did a lot of logging and tweaked it further on a custom map 6 with a decent dragy time too
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Thanks for keeping us updated
On my previous car, I purchased a racechip GTS Black with mobile app control, but never fitted it. I've just received a response from racechip that they can swap it out for the RS3 8Y version.
Be interesting to see if I get round to fitting it this time (once I get the RS3 variant) View attachment 253815
Good luck....
Terrible , terrible company .
Had a JB4 on my Daza engined RS3.
Made an around extra 40 hp and 54 ft-lbs over the standard figures when on the RR at Unicorn in Stockport with map 3.
Did a lot of logging and tweaked it further on a custom map 6 with a decent dragy time too
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Strong 0-60 from just the JB4, I had Revo stage one on my Daza, best was a 3.08 from memory but 3.2s is what it would get consistently.
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On the Jb4 installed on the Mini F56 Cooper S model 2021 there is a setting where JB4 does a massive error cancellation due to the use of a sport catalyst . It seems an unrefined solution but in practice it works . I have already done 10.000 km after installation of 200 cell catalyst. I haven't had any problem and I've never read an error code on the ECU. Is there this option also for RS3 8Y?
2 of the connectors are different on the 8Y.
I’ve been messaging George with info about the issue, they are making me a new loom, so should be here next week.
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Not a brilliant result this morning but one very interesting observation....
0-60 marginal increase to 3.52
And 1/4m 11.82... however... its the speed at which it hit the 1/4 ... 121mph !!!!
This tells me the racechip is more focused top end when moving.. not lower speed.
So I got to use the racechip I've had for more than a year now, it will stay on for the time being see how the jb4 performs but mainly hold out for ecu unlock.
Don't buy a racechip if traffic light sprints are your thing!
0-60 marginal increase to 3.52
And 1/4m 11.82... however... its the speed at which it hit the 1/4 ... 121mph !!!!
This tells me the racechip is more focused top end when moving.. not lower speed.
So I got to use the racechip I've had for more than a year now, it will stay on for the time being see how the jb4 performs but mainly hold out for ecu unlock.
Don't buy a racechip if traffic light sprints are your thing!
Hmmm interesting.
The new harness is going out from the USA on Friday so should have it Tuesday hopefully.
Been a delay on electrical connectors.
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A little work to still be done.
While waiting for a new loom, I managed to source the correct connectors for the top boost sensor.
So decided to re pin it
Connected up and all seems ok.
Currently running on the Map 1 and doing some logging for George at Burger so he can check AFR etc…..
Car is running at 2psi over stock.
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While waiting for a new loom, I managed to source the correct connectors for the top boost sensor.
So decided to re pin it
Connected up and all seems ok.
Currently running on the Map 1 and doing some logging for George at Burger so he can check AFR etc…..
Car is running at 2psi over stock.
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I logged at 4800 rpm 15.9 PSI that the ECU was seeing and actual was 17.9 PSI.
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My M4 isn't exactly a slouch but I drove (and am buying) a Tesla Model 3 Long-range which is fecking quick (probably not far off my M4) but only has a 0-60 of 4.2.
3.45 as above much hurt!
Can't wait to get the damn thing.
3.45 as above much hurt!
Can't wait to get the damn thing.
shahaf2911
Member
That’s wet ? Damn that’s as fast as I’ve managed on dry which slipped just a tad!Couple of launches in Map 1.
Wet as it’s raining here.
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What are the hp and tq claimed gains from map 1 ?
And a question, if you remove the JB4 (apart from them searching for something wrong for example, the ECU recording a higher boost level which will indicate a tune) can they see you’ve done anything if you returned everything to stock ?
And is it possible to add some pops and bang ? I don’t like the exaggerated ones at all but the 8Y has none (just on S and not in manual mode there is the gear change crackle (?) but no other noises) which is a shame IMO.
I had a JFA unit on my RS4 as back then the ECU had not been cracked. I used to take it off the car every time it went to Audi and no one there batted an eyelid for the few years it went there before sold. No guarantees though I guess.
My attitude was that if they ever did say something I would just deny all knowledge.
TX.
My attitude was that if they ever did say something I would just deny all knowledge.
TX.
It was tramping and the rear was pushing all over the place
When I ran one on the Daza 8V I made 37bhp and 58 FT-LBs extra when I Dyno’d it on Unicorns RR, Which is notorious for being accurate.
The car does feel stronger though, and it tends to make the car a little louder, which all helps.
Regarding the Dealer, who knows really, I’ve seen Odis running suspicion checks when connected up to cars (my old remapped 8V being one) but nothing conclusive.
When I used Dyno spectrum to tune the 8V it did have a ECU logging function that was in the ECU, and I could access that just after a drive, it didn’t store huge amounts time wise but it’s capable of logging internally non the less.
Pops and bangs are ignition tables related so not possible with a JB4 as it has no control to Pull negative timing to create them.
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I think had it been dry I’d be at 3.1 as it was struggling to put the power down, the rear was shuffling the power around.
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Appears to be adding 3psi/0.2 bar,This is from the left
Revs / ECU psi / target increase / actual psi / pedal position
Highest ignition advance on this run was 18 deg.
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18 degrees ignition is good I would have thought, in my experience once you need to start retarding timing as you increase boost you gain best part of SFA.
I upped the lads RS3 engined Golf by 0.1 bar at a time, once I had to start retarding the ignition to stop det the inbuilt ecu logger said we wernt going any quicker on acceleration, still 100-200kph between 6 and 7 seconds depending on gear change is quick enough
Sometimes that little bit of slip actually helps times
Appears to be adding 3psi/0.2 bar,
18 degrees ignition is good I would have thought, in my experience once you need to start retarding timing as you increase boost you gain best part of SFA.
I upped the lads RS3 engined Golf by 0.1 bar at a time, once I had to start retarding the ignition to stop det the inbuilt ecu logger said we wernt going any quicker on acceleration, still 100-200kph between 6 and 7 seconds depending on gear change is quick enough
Yes it seemed good, just a shame the car fumbled about on launch so much.
It’ll be interesting to see how it performs in the dry……
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Checking a car's performance increase by measuring 0-100 km/h does not seem to me to be the best tool. Especially when you are under 4 seconds. Much more significant is the 100-200 . But it seems to be understood that the car computer does not allow this. Even the 0-200 km/h would be more suitable as a comparison of original performance versus JB4.
Yes I agree, when I mapped the lads RS3/Golf I was able to log speed v time through the ecu to accurately measure acceleration and see what worked and what didnt, increasing boost worked until we had to start retarding timing, then we where 'robbing Peter to pay Paul' with no increase in performance
The 1/4 mile or as you say 0-200kph would probably be a better indication as it would lessen the effects of the initial launch.
I did similar years ago (too many years ago tbh) with a customer and his 911, he paid a lot to have it mapped on a spare ecu (when you could just plug and play them!) his car was quicker, stopwatch v digital speedo on the std ecu..................
Lol we live in the Uk so having access to doing those sorts of speeds isn’t possible legally.
Whereas a 0-60 sprint is possible in the right area, without ruffling too many feathers.
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