[netopyer]

hello everyone.

i read the chips comparison article , and i want to get racer X chip, but i dont know where to get it, since speed6.com website is unavailable .



Or is the second place chip the best available chip left on the market?



also, the article is quite old, so maybe i am missing some new offers and options.

We have 100 octane fuel available here and i am using it all the time , in emergency i am using 98 octane, and i ordered KN air filter and i will make airbox mod for sure , maybe later with some exhaust mufflerectomy .





not a lot possibilities to get anything for my car in my country , since it is one of a kind here ....



one mile from my home there is a dyno with hydraulic retarder which can measure power on wheels and also measure power losses, so it can give also engine crank power as a result. , so when i manage to have all mods, i will post results



thanks everyone

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[banditsc]

There is the RSBarn that has been popular, assuming he is still operating? FR Wilk also has a chip now, never heard of anyone running one yet, but he is well known for his tuning. http://www.powerprom.com/968.htm

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[rxter]

Had a weltmeister in before the RSB and airbox mod. It was great over 4K RPM.

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[netopyer]

maybe in the end i will do the software modification myself ..

there is some documentation out there about motronic in general , and also some definitons of maps , and i have equipment to burn the software to chip myself, so maybe that will be the way (with some externam AFR meter to chceck if it is not very lean)

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[94SilverCab]

Go with the RS Barn chip and the air box modification...easiest HP available.



Jay

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[flash]

tuning a chip is no simple matter. you have to have a lot of equipment to monitor the conditions. at a bare minimum, you will need a wide band sensor and device to read the air/fuel mixtures, and a knock counter. you will also need an eddy current type of dyno, so you can apply a load to the car.



further, the above only deals with wide open throttle tuning. the real magic is in part throttle tuning, and that will require all of the above equipment, and a laptop with software capable of doing live mapping.



i conducted the shootout test of the chips, and have tested the rs barn chip. in the end, the differences in the ones i tested are so small, that whatever you get your hands on will be better than where you are. i still have quite a few of the chips here, and am just about to sell them off.

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[netopyer]

Then i am open to your offers <img src="/forum/images/smilies/968/smile.png" class="smilie" alt="" />



As for the tuning, if i do it, independed wideband lambda with gauge will be added for sure, also with some knock detecting device

A load on the dyno is not a problem, because it is not only intertia dyno, It has hydraulic retarder which can stop almost any car at any revs (MAHA LPS 3000)



Live mapping is a bit of a problem in my conditions , but there are some rules for adding smoothness and power in part throttle driving (and there is less risk of engine destruction for sure when not done correctly)



i think there is some headroom because of high octane fuel, airbox and future exhaust mod



in addition , i do diesel engine modifying and ECU tuning as one of my job/hobbies so messing up with maps and hexdump is familiar for me.



if you dont mind, here is the link to video of one dyno testing on mentioned dyno, and dyno result can be seen on the end of the video, so you can see how long does it take to measure 300 ps /500+nm car , the retarder was set to 20 percent..



http://www.youtube.com/watch?v=m7G4jO9vCXE



the graph from the first testing, video is from 2nd run :

http://dieselpower.cz/forum/userpix/2893...4911_1.jpg

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[MCL968]

[quote name='flash' timestamp='1392390364' post='155065']

tuning a chip is no simple matter. you have to have a lot of equipment to monitor the conditions. at a bare minimum, you will need a wide band sensor and device to read the air/fuel mixtures, and a knock counter. you will also need an eddy current type of dyno, so you can apply a load to the car.



further, the above only deals with wide open throttle tuning. the real magic is in part throttle tuning, and that will require all of the above equipment, and a laptop with software capable of doing live mapping.



i conducted the shootout test of the chips, and have tested the rs barn chip. in the end, the differences in the ones i tested are so small, that whatever you get your hands on will be better than where you are. i still have quite a few of the chips here, and am just about to sell them off.

[/quote]



Hey Flash, I am also in the market for a chip for an early 92. I have done the airbox mod, so a chip seems like the next step. Thanks!

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[flash]

re: exhaust mods - been there done that - many times - not alone in that either - there no gains to be had without corresponding losses. it's pretty much "pick your poison". you can gain a little up top but lose bottom. other than that, it's just tone and weight loss that you can play with. both can be satisfying enough though.



re: chips - let me go down and see what i have. i'll put up a thread in the classifieds once i do. it will be a couple of days.

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[netopyer]

i am OK with losses on bottom if there is corresponding gain on top ...





anyway: postage from USA to Slovakia will be much expensive than the cost of the chip itself.. is there a way to sell me only the file?

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[flash]

re exhaust: unfortunately that is not the case. the bottom end losses are a bit more than double the gains. the most i've seen from any cat-back is a 4hp gain, and that was up over 5k rpm, with no discernible gain below that point. that system also resulted in a 15 lb/ft loss at 3400rpm, and about half that below that point.



there are quite a few threads about exhaust mods on this car. check them out. it doesn't respond like any other car i've ever dealt with. it has been a real pain in the butt. the bottom line is that you do not want to increase flow. it messes up the pulse timing and gas velocity, resulting in some rather odd behaviors.



re chips: i cannot sell the file. the files on the chips belong to the manufacturer. sending the file would be the same illegal and immoral act as sending an unauthorized scan of a magazine.



i just noticed in your signature that you list the car as a "targa". i almost 10 years of being immersed in the 968 world, i've never seen one of those. i've always though that would be cool though. so far, i've only seen sunroof cars. do you have any pics of the targa top?

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[rxter]

I've got the chip for the modded airbox. Happy to sell it. PM me.

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[flash]

and there ya go!!!

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[netopyer]

re exhaust: maybe / for sure it has someting to do with the resonance intake and thus torque ..

is there any valve overlap?





re chips:

i think there is no difference sending file or sending memory, because when i have memory, i have also the file, because i can read it , but stealing(read and sell) intelectual property is not my cup of tea - and sadly, it is very common these times <img src="/forum/images/smilies/968/sad.png" class="smilie" alt="" /> , that idea was proposed just as a method to deliver the tune to me easier/cheaper



i would probably download the file from memory if i receive any chip, because i just want to know what do i have in ECU ..



re targa:

i have a badge on rear which says 968 on the left, and TARGA on the right , but car is coupe with detachable sunroof which can be tilt by motor from the dash - i think this is regular coupe just like any else and the targa badge is only marketing stuff or one of the previous owners got 911 Targa badge on it, i really dont know

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[flash]

re: exhaust - yes, a bit. the intake is what really messes things up though. the dual resonant timing, coupled with the variocam, makes it hard to tune the exhaust.



re: chip - no worries. however, there is an ID string in the mapping that will cause a code to be thrown if you don't use the right software to create the maps. the software will cost you more than the chip, even including shipping. probably best to just buy rxter's chip.



re: targa - yeah - sounds like somebody stuck a 911 badge on your car. as far as we can tell, the 968 never came as a targa, and never had that badge. i still think a targa would be cool though. maybe someday somebody will do a conversion.

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[netopyer]

re exhaust: i will leave the exhaust as it is then ..... for now ..





re chip: that is called checksum and it is not a problem, even without "proper" software , the locations of the checksums are available on the web..

e.g : http://www.mapfinder...8_MapFinder.txt

anyway now i am browsing the e-shops and i found some really good looking AFR meters with all stuff needed to install it, including bosch wideband lambda sensor...



next thing will be standalone knock detection device but i have some friends which can maybe help me with this...







re targa: if i put 968 targa to image search on google, it throws some images so maybe there was some edition like "968 sport" in UK ,,,

only targa which i like is the 991 one, the 964 is ugly imho..

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[flash]

yeah - nope on the targa. there was a sport in the UK, but not a targa.



re: chip - there is the checksum, but there is another line of code in there hiding too that is outside the maps. i ran into it when i was doing the SC chips.



tuning it yourself is going to cost you a lot more money, not to mention the time, than if you just bought a chip. it can be fun, or it can be a royal pain in the butt. it really depends on the individual and their personal preferences. one thing for sure, there won't be any benefits to doing it yourself. it's not like you'll find more power than one of the good chips out there.



have fun

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[netopyer]

i will see,,,

today i started analyzing the file...





ignition advance seems to have peak at 24° at 3000 on <acronym title='wide open throttle'>WOT</acronym> , then it drops and goes slowly up again with RPM...

i will see if i can get that AFR gauge and knock detection device next week and if yes , i will post first results graphically compared with stock software from dyno mentioned before

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[flash]

since you have an ROW car, you may not see the problem pop up. for us here, it throws a check engine light. it also often puts the car into "limp mode" and retards the timing to protect it.

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[netopyer]

i will do diagnostics to check for any error(s)

if the LIMP mode is activated, there should be an error recorded and if, that will be a pointer for me to solve that situation



maybe in the end, i will end with some other chip from well-known manufacturer, but now i am becoming really hungry for my own results

and also, it will give me some experience

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