Mark@Abbey m/s

Yes the Eprom in the UK car is a lot smaller than in the US and JDM cars, thsi stops us uploading a patch to allow all the good features that the late UK 296bhp cars, US and JDM 276bhp cars can use, I.e live mapping and multi maps.

No not like that , it will be using a custom ECU to live map the car then flash the data into your ecu. it is all in the pipeline at the moment, will have some news very soon.

Re only running stock ECU with F/I I have a very good friend that is a tuner in the US that has beent uning Z,s since coming on the market, thats says that he takes the Utec off of F/I cars and tunes with Uprev and finds BHP torque and repeatability on dyno runs. We have tuned Z,s om HKS F-con Pro as well that works real well but needs a few parts to allow the cams to be controlled and the right signals to allow fuelling and ignition to be controlled in relation to cam angle. But it works out very expensive and really needs a throttle cable set up fitted to work 100% corrrectly. I find it hard that it is said that the stock ECU isnt good enough for F/I , the ECU is far more complex than any lower end after market standalone or piggyback systems. The ECU is from the same family of ECU,s that run in the R35GTR , and with recalibrating load/rpm scales and changing maf,s will work very very well. Re the knock control the trouble is that over say 4500 rpm even a stock motor becomes very noisy and the ability to read knock noise over engine noise becomes very very hard. Thats why we listen to motors with a det listening device when tuning cars and dont depend on Stock knock sensors or control. The only trouble we have at the moment is that the UK car ECU isnt live mappable but I have been working on this and I hope to have a fix for this as well , I may even be able to allow multi maps on the UK cars ( this is all being sorted at the moment but I dont get my own UK car back till Jan some time , this is going to be the mule car) I can map Utec if needed thou and we can use both the Utec and Uprev to get the best from your car if needed. fire away with anymore questions.

main problem with the UK 350Z car is the inability to be able to live map the ECU,s , it makes what would be an easy job into a job that takes a little time. I think I have come up with a cure that will make tuning N/A a little easier but make tuning the F/I cars very very easy instead of being a real hassle , which I feel will allow all the forced induction boys the chance to throw away the piggy back system. I feel the Stock ECU struggles to work with a piggy back system as the stock ECU is always feeding back to trim the fuelling and working igntion timing. With regards parts to make a tuning package up , I will say we have been removing the Stock cats fitting a Y pipe with a cat fitted and the stock exhaust seems to work real well and make a nice sounding car.So this will save a few quid and allow the car to stay reasonably quiet. hope this all helps. Price of the reflash is £352-50 inc VAT afetr the 1st of January.

Ben where you based? Mark

Hi ya , welcome to the forum .

The STD gauge are not good , even at 100deg C the gauge is still around in the middle of the min and max. You say that yout hink the guage is running a little lower than normal. If you say the car has got less econimical , I would say it maybe another problem , these 350,s run very little cold start fuel , so even of the car is running around 50deg C I cant see this making that much difference. Has it thrown any CEL,s up? it could be a O2 sensor starting to fail , this can cause the part throttle AFR to go rich. But got to agree with the boys on here if the coolant is low the heater will be blowing colder , doesnt the car get warmer of you leave it standing running?

I must admit I would have an auto car , so nice in traffic , spot on gear changes but also has the ability to be able to be manually changed. I must admit these cars are awesome. Mark

cheers for that dude, they do got a lot better after a little tweak.

Yes it does.

Bennets car didnt have UPREV he used a Utec for remapping. We do remap the throttle map , far better response than a STD car

you can take that off , UPREV works far better, you even get 100% throttle in each gear. Cookie have you got a Y pipe fitted as well?

Wonder if these will work , are they a direct copy of a std plenum?

could I have both of your full car spec,s will help me to build a couple of maps to be uploaded on the day

Only work Saturday mornings , but if you was with us for 8 I think I could get 2 cars done before 1 when we finish. Mark

The larger figure is the hub torque we then divide it by the effective final drive ratio to get a flywheel figure. Bradley , good to here your happy. enjoy. Car wasn,t to loud either with the de-cats fitted. 3FIDDYZ car with the headers fitted gives a little more midrange torque and a few more top end BHP , sounds a little different as well. Mark

Yeah we may need to dump the ECU , so maybe 2 visit,s. It,s a shame but Nissan do have the habit of using different images in there cars.

Lee, I didnt say I havent got the mapping, I need either your chassis number or ECU to make sure we have the correct RAM image. Auto cars have different RAM images to manual cars also cars with out cruise are different to cars with . Can you PM me your chassis number? Mark

Didnt they road test the car after carrying out the service?

2 cars in one day will be okay. sure it will be worth it...... the trip from Scotland.

The cat in the Y pipe is of a less restrictive construction like a set of HFC,s, but easier to remove and refit. Best of both worlds. Mark

Yes that what I thought , you can run a CAT a silencer and a decat pipe. Will run it on our car once it turns up. Mark

HFC do work but we have also found running without cats is good as long as you have an exhaust system that is pretty quiet.We can turn the CEL lights out if you remove the cats as well. I have been looking into using a Y pipe fitted with a removable CAT so we can remove the STD retrictive cats. But this wont happen before xmas, but I will keep you up to speed on development.

You lot of gone quiet re UPREV reflashes done a few more cars , still getting good results, not had anyone say thay aren,t pleased with the results. They go up on the 1st of January thou just due to the VAT increase from £345-00 inc vat to £352-50 inc vat. Mark

We think it threw a CEL on due to the battery maybe getting a little old and when the car was cranking the battery voltage went low enough to trip a BCM code due to low battery voltage , not seen this problem before , but there is a 1st time for everything. We reset the CEL light , sent the customer on his way and told him to change his battery and keep an eye on the problem. Mark