[F30Allen]

Hey what's up guys, so I was looking to buy used tunes from classified section and other sources. I came across a race chip ultimate for really cheap. I couldn't really find much information about it or even videos of it in an f30 335i. It should be coming in the mail sometime next week. Anyone else use race chip? I was gonna go jb4 and I know all the jb4 heads will scold me. I got it cheap and just gonna try it. It claims up 378 hp and 375 torque on stock parts and also improves gas economy. Kinda hard to believe. Only plugs in to two places. Jb4 guys I know about data logging and code reading don't thrash this thread. But yeah going to see how it goes. Seems to be new item so not much using it for our cars. If anyone is using it please chime in. When I get it I will do a review on it. Possibly get it dynoed. Will keep those who are interested updated.

[mike@x-ph.com]

RC is comparable to the JB stage 1 and not the JB4. Its a stage 1 tune, Jb4 is a stage 2 tune


You will get noticeable power increase

[F30Allen]

So I received the race chip ultimate I bought from someone tonight and did some testing. It's definitely a noticeable increase in HP and torque. I did a hard launch and I can hear my tires scream, sounded like I was losing traction in like the first few gears. I'm on fresh Michellin Pilot Super sports too. I usually drive in sports plus mode and do hard launches and I don't hear my tires normally scream like that. On the freeway it pulls hard and smooth. Power curve seems to be pretty linear. Im thinking of taking it to the dyno to see what it's making and see if it's as advertised. I also got a jb4 stage 2 on the way so I'll see how the race chip compares to the Jb4. To be honest it kinda caught me off guard. But I'll report back again later maybe bumping up some of the settings.

[F30Allen]

Since I have a jb4 coming should I connect it on top of the race chip run jb4 on data log only? Do you think that's possible?

[Bee Pee]

Originally Posted by F30Allen

Since I have a jb4 coming should I connect it on top of the race chip run jb4 on data log only? Do you think that's possible?

I doubt you can stack RCU and JB4 together as they plug into same sensors.

[F30Allen]

Originally Posted by Bee Pee

I doubt you can stack RCU and JB4 together as they plug into same sensors.

Not so much stack them for performance but use JB4 in data log mode only to see what the race chip is doing.

[mike@x-ph.com]

Originally Posted by Bee Pee

I doubt you can stack RCU and JB4 together as they plug into same sensors.

Originally Posted by F30Allen

Not so much stack them for performance but use JB4 in data log mode only to see what the race chip is doing.

You can't do that, they are both piggybacks and the Jb4 uses all the RC sensors plus a couple more.

If you are looking for stage 2 features like datalogging, there is no benefit to getting the RC over the JB4

[FSociety]

I agree with what has been said.

Use 1 or the other, which JB4 did you order ? because if its not the OBD2 version then you'll have to buy extra stuff etc.

Anyways, enjoy the power of RaceChip you can get a cheap bluetooth and connects to an app called TorquePro. And if you want more power and want to add downpipes, add e85, etc then remove RC sell it and install JB4.

Looks like you're heading towards a real review of both ? That'll be best that way you see it for yourself what its actually doing on your car and not the next person car lol.
Drive racechip for a few weeks, def minimum 300-500 miles, Dyno it ? Then do the same with JB4 and you can get a real comparison how it works on your car.

I had RaceChip before in my previous car and now using JB4 in my new car but its not 100% due to revised engine running higher boost than stock N55 etc. So I can help out or give you any tips on both side.

N54tech.com is a great forum for JB4 users and Bee Pee is a very well respected user of JB4 and don't know if its him but i think he tried Racechip too.

[F30Allen]

Thanks guys! I just figure since the both can be connected at the same time and read from the same sensors if I only used jb4 for data logging and no tune I was wondering if it could work so I can data log RCU. Just curious though, to me it make sense lol I'll try it actually. Also I have the latest jb4 with Bluetooth. But will be running the RCU for a bit since it only took me 5 mins to install. I have MPpK and can definitely feel the difference with RCU. Will up the settings soon. It's definitely like a stage 1 tune with a bit of flexibility. I have downpipe and intercooler on the way so I may throw the jb4 once I start to crave more power.

[F30Allen]

Originally Posted by FSociety

I agree with what has been said.

Use 1 or the other, which JB4 did you order ? because if its not the OBD2 version then you'll have to buy extra stuff etc.

Anyways, enjoy the power of RaceChip you can get a cheap bluetooth and connects to an app called TorquePro. And if you want more power and want to add downpipes, add e85, etc then remove RC sell it and install JB4.

Looks like you're heading towards a real review of both ? That'll be best that way you see it for yourself what its actually doing on your car and not the next person car lol.
Drive racechip for a few weeks, def minimum 300-500 miles, Dyno it ? Then do the same with JB4 and you can get a real comparison how it works on your car.

I had RaceChip before in my previous car and now using JB4 in my new car but its not 100% due to revised engine running higher boost than stock N55 etc. So I can help out or give you any tips on both side.

N54tech.com is a great forum for JB4 users and Bee Pee is a very well respected user of JB4 and don't know if its him but i think he tried Racechip too.

I have a question for you. Since I have mppk do you think the jb4 stacks on top of it or even the RCU since mppk is flashed to Dme. I would assume mppk would be base hp. Right? Mppk is not piggy back if I'm not mistaken.

[Bee Pee]

F30Allen

RCU and jb4 maps 1 and 2 are additive so they will stack on top of mppk tune. Advantage that jb4 map2 has is that it is canbus active hence why it can notional stack more boost (6psi) than map 1 and RCU - both abt 4-4.5psi.

Also being canbus enabled, jb4 can take advantage of any bolt ons whereas RCU will be restricted by how DME reacts to changes in hardware or fuelling.

Jb4 maps 5 and 6 are absolute so take charge of more sensory info to add optimal boost - much more sophisticated and effective than additive method.

BP

[F30Allen]

Originally Posted by Bee Pee

F30Allen

RCU and jb4 maps 1 and 2 are additive so they will stack on top of mppk tune. Advantage that jb4 map2 has is that it is canbus active hence why it can notional stack more boost (6psi) than map 1 and RCU - both abt 4-4.5psi.

Also being canbus enabled, jb4 can take advantage of any bolt ons whereas RCU will be restricted by how DME reacts to changes in hardware or fuelling.

Jb4 maps 5 and 6 are absolute so take charge of more sensory info to add optimal boost - much more sophisticated and effective than additive method.

BP

Thanks for the info it's greatly appreciated.

[Bee Pee]

Originally Posted by FSociety

N54tech.com is a great forum for JB4 users and Bee Pee is a very well respected user of JB4 and don't know if its him but i think he tried Racechip too.

Fsociety

Thanks for the kind words.

I didn't buy RCU before JB4 but I have driven an m235i with TMC (similar to RCU) here in the UK. The albeit short drive in a fully adapted car to TMC was good but lacking up top.

F30Allen

RCU, TMC stage 1 tunes act as slave to DME so stock trait of boost tailing off beyond 5500rpm is more noticeable than say JB4.

If you are happy to short shift then RCU will work as it delivers well in the low to mid range. Jb4 however delivers more across a wider rev range. Absolute maps can tweak or be tweaked to keep boost higher for longer. Look at most jb4 dyno plots and you will see that power curve dips later nearer redline.

BP

[FSociety]

Originally Posted by Bee Pee

RCU, TMC stage 1 tunes act as slave to DME so stock trait of boost tailing off beyond 5500rpm is more noticeable than say JB4.

If you are happy to short shift then RCU will work as it delivers well in the low to mid range. Jb4 however delivers more across a wider rev range. Absolute maps can tweak or be tweaked to keep boost higher for longer. Look at most jb4 dyno plots and you will see that power curve dips later nearer redline.

BP

Don't forget he lives in California so he prob has 91 octane, not much options with neither tune if he wants to start getting more aggressive.

So OP, I think if you have access to e85 the JB4 will be better off. But you also have to find out what do you want out of your car.

[Bee Pee]

Originally Posted by FSociety

Don't forget he lives in California so he prob has 91 octane, not much options with neither tune if he wants to start getting more aggressive.

So OP, I think if you have access to e85 the JB4 will be better off. But you also have to find out what do you want out of your car.

If CARB friendly and staying stock then RCU or jb+ is probably the way to go.

If wanting to go beyond that with low grade gas then best talk to Enzo Performance or Hex Engineering or PTF - bootmod3 developers

BP

[FSociety]

MissionPerformance is also in California also good option
apexlocator M5 got tuned by them
Bmw doubles 535
ocN55 m235 as well

Def proTUNING Freaks BM3
I don't think VF-Engineering HEX Tune is out for N55 yet ?

[F30Allen]

Originally Posted by Bee Pee

If CARB friendly and staying stock then RCU or jb+ is probably the way to go.

If wanting to go beyond that with low grade gas then best talk to Enzo Performance or Hex Engineering or PTF - bootmod3 developers

BP

Yeah kind of limited here in so cal. I do have a station that sells e-85 and there's a few 101octane stations. Not trying to make crazy power. Just want that kick when I feel I need a little excitement. I may load 101 octane and run map 7 on jb4. I wonder if I can run that whole tank as a daily driver. I may take my car to track day for fun but not really for competition. I should be full bolt on soon. So at least with jb4 I'll be able to utilize the parts I install. For now I just have intake and exhaust RCU should be enough. Funny I bought the RCU from someone because I was waiting for a used JB4 to go on the classifieds. Right after I bought RCU the jb4 was being sold. Lol great info again, thanks so much guys.

[Bee Pee]

F30Allen

Is your car EWG and your jb4 installed with additional ewg harness ?

If so, map5 with 101 octane gas will be an absolute hoot. Log it and check how timing and avg ign looks then flip to map 7 - tried it with octane booster added to the tank and map7 is hilarious. Too much for our busy roads here in the UK.

BP

[F30Allen]

Originally Posted by Bee Pee

F30Allen

Is your car EWG and your jb4 installed with additional ewg harness ?

If so, map5 with 101 octane gas will be an absolute hoot. Log it and check how timing and avg ign looks then flip to map 7 - tried it with octane booster added to the tank and map7 is hilarious. Too much for our busy roads here in the UK.

BP

Unfortunately I have pwg so not as much power as the ewg. I will try it when I install the jb4. So what's the estimated hp when using jb4. I know nothing about tuning and all that. But I will be willing to learn so I can make the best of my car and enjoy it even more than I am already. This is my first euro car it's much more fun than the Japanese cars I've owned. I've dump a bunch of money on my car ever since I got it. So far so good.

If I changed my fuel lines from fuel it would I be able to run small percentage of e85 with no problem? Or would I run in to parts deteriorating? There's a station close by and I'm tempted but scared lol