Slater Posted May 24, 2005 Report Share Posted May 24, 2005 The turbos flow almost identically. The only difference in CFM is at boost levels that I won't even see on a stock car.So why do I need a remap? Are people just saying that to try and sell me a chip, or because it sounds like smart thing to say. Or do you have FACTS to back up the statement? Because I don't believe it.Hell, Rica told one guy on here that he can runs his 18T with a 15G map "just fine"! So it sounds veeeeery fishy to me why I suposedly have to remap to bolt a 16T on.- Slater Link to comment Share on other sites More sharing options...
kenhoeve Posted May 24, 2005 Report Share Posted May 24, 2005 don't need it. but throw down pipe, exh at it and you might want it. Link to comment Share on other sites More sharing options...
BlackT5 Posted May 24, 2005 Report Share Posted May 24, 2005 You have a wideband? Just run the 15g map and see how the AFR looks. Link to comment Share on other sites More sharing options...
sp5368 Posted May 24, 2005 Report Share Posted May 24, 2005 Slater what wideband do you have on your car. Link to comment Share on other sites More sharing options...
Slater Posted May 24, 2005 Author Report Share Posted May 24, 2005 You have a wideband? Just run the 15g map and see how the AFR looks.←I assume it will be pig rich like every other chip out there. That's why I'm suspiscious why I would need a remap for a turbo that basically flows identically to a 15G... Link to comment Share on other sites More sharing options...
Slater Posted May 24, 2005 Author Report Share Posted May 24, 2005 Slater what wideband do you have on your car.←None yet, as I have not decided which one I want. Probably gonna be the M500 Link to comment Share on other sites More sharing options...
thelostartof Posted May 24, 2005 Report Share Posted May 24, 2005 you have seen the maps right? nevermind the slightly larger housing that's not a big issue but the difference in the wheels very much does change how the turbos act. yes the 16t is just a bit more efficient but still ... chip it right OR drop some $ on an aftermaket EMS so you can do it yourself and set it up right(megasquirt)the fact is that it still does flow more air @ the same psi and if the chip is tuned RIGHT to be uber lean right where it needs to be then going w/ a larger turbo will push it over that max power lean mark and make it dangrous. if the ECU/chip is tuned rich to begin w/ then you should be fine as long as you are not pushing it to far Link to comment Share on other sites More sharing options...
EricF Posted May 24, 2005 Report Share Posted May 24, 2005 15G and 16T are almost identical aside from the turbine housings...See how the AFR's are with the 15G chip and if you need a remap. I doubt you will. Better safe than sorry though. Link to comment Share on other sites More sharing options...
thelostartof Posted May 24, 2005 Report Share Posted May 24, 2005 15G and 16T are almost identical aside from the turbine housings...See how the AFR's are with the 15G chip and if you need a remap. I doubt you will. Better safe than sorry though.←the wheels are also very differnet no? hence the G vs T and the late 15g has the same housing as the 16t flat straigh flange? or is teh 16t angled? Link to comment Share on other sites More sharing options...
steve s Posted May 24, 2005 Report Share Posted May 24, 2005 slater...to be honest with u, i remembered (hopefully correctly) cj has 17?(something non-volvo) on his t5r, and runs ipd's ecu. i'm not sure if he ran a different ecu than the standard upgraded ecu for the 15g. but on our dyno day a while back, assuming the only diff between us is the turbo, and the same ipd ecu, he ran a really really flat torque curve with no dropoff, unlike mine (which u can find in those recent dyno threads). ask him what he has (cj is the guy offering the porsche/r bbk by the way) Link to comment Share on other sites More sharing options...
Slater Posted May 24, 2005 Author Report Share Posted May 24, 2005 you have seen the maps right? nevermind the slightly larger housing that's not a big issue but the difference in the wheels very much does change how the turbos act. yes the 16t is just a bit more efficient but still ... chip it right OR drop some $ on an aftermaket EMS so you can do it yourself and set it up right(megasquirt)the fact is that it still does flow more air @ the same psi and if the chip is tuned RIGHT to be uber lean right where it needs to be then going w/ a larger turbo will push it over that max power lean mark and make it dangrous. if the ECU/chip is tuned rich to begin w/ then you should be fine as long as you are not pushing it to far←I think that's the THEORY but not the REALITY. Good chips (Rica, BSR, etc) do not run "uber lean". They run PIG RICH. We've all see dynos that show the uber rich graphs (the exception being ST which I do not have).Why else would Rica tell this guy he could run an 18T on a 15G map!?!?! I remember reading the post a few weeks ago ad couldn't believe it!I have a feeling the people telling you "you NEED a remap" are trying to sell remaps. The differences between a 15G and 16T are minor IMO. Heck, I'm sure those people would say you "need a remap" when going from a 15G conical to a 15G straight flange haha.- Slater Link to comment Share on other sites More sharing options...
thelostartof Posted May 24, 2005 Report Share Posted May 24, 2005 since you do know they are set to run rich then that's a good thing as that should allow you enough room to run more airflow w/o leaning out. the fact is if the chip was 'tuned' right where they made max power(ran lean) then YES you would need a remap or whatever, but the fact that they run rich and are not making max power does give you room for flowing more air. maybe there is only one real setup/tune out there and its for a 18t setup and they just play if all off as works for X X X setups and just let people run on the safe side of rich but hey as long as you have that extra room go for it tho as w/ any mod pushing more air into the motor please do make sure you get it dyno'd asap so you know where you stand a/f wise so if you do need a bit more fuel(could be as easy as throwing in a $20 4 bar fpr just to bump it up a little) Link to comment Share on other sites More sharing options...
George @ ViVA Posted May 24, 2005 Report Share Posted May 24, 2005 I imagine a major reason why so many people have such rich A/F ratios on the dyno charts is because the cars are not getting enough airflow from the fans in front of the car. Link to comment Share on other sites More sharing options...
thelostartof Posted May 24, 2005 Report Share Posted May 24, 2005 I imagine a major reason why so many people have such rich A/F ratios on the dyno charts is because the cars are not getting enough airflow from the fans in front of the car.←so if that was the case then it wouldn't be safe to run a larger turbo or any more cfm than the ECU is configured for never mind besides the whole air flow thing(if the intercooler wasn't being cooled properly) and the temps each dyno was done @ a/f's can varry good amounts also depending on the shape of the persons engine and sensors soonly way to know for sure is install it .. run and it and hope that stuff don't blow up haha Link to comment Share on other sites More sharing options...
ROB @ VMS Posted May 24, 2005 Report Share Posted May 24, 2005 The main cause of doing a remap is not only to adjust fueling if need but to also adjust boost levels and the curve. A 18T on a 15G map can be fine if boost levels are down enough to keep things on the safe side and also a mbc to control boost. Also a Stock 15G map has fueling set up for x amount of boost. Basicly you can start out with a 15G map. Lower boost down on the 18T until you have figured out where the best median is. Then from there you raise boost and adjust fueling and ignition to optimize the mix. Base tuning is the most important thing and what i really have people do is DYNO first then get air fuel. Then from there you adjust IF needed which if you want to full make power out of the 18T then you will need to adjust some things. Link to comment Share on other sites More sharing options...
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