Supercharged Lexus RCF Playing With Chevy Corvette C7 Z06
06-08-17, 09:14 AM
#31
Lexus Champion
Anything can happen, it really comes down to the driver, if the driver is in the wrong gear then that's their fault. I had a run in with a 650s before the supercharger, we went from 110-161 MPH, I was on the right and he was coming up fast on the left, once he was beside me, I WOT and walked him about 1.5 cars and got over into the left lane, by the time it was over I probably had 2-3 car lengths on him. Again it's really down to the driver, anything is possible.
civics do fly by all the time and i actually slow down to avoid rock chips.
Is racing a car not really trying to race, considers racing and winning? Just like the Z06 owner, he was never lined up and given 3 honks (for him to get ready) before you took off. Yea its fun and all, but its far from a win. Who knows, the 650s could hit the brakes to avoid rocks flying onto his paint at 100+ mph
06-08-17, 09:17 AM
#32
Lexus Champion
My RC-F weighs in at 3860 if you're going to get all technical. LIKE I SAID, up to 30-40, you can keep up, a bugatti isn't going to get to 5mph faster than a Honda Civic, but it'll get to 150 well before. Second this reminds me of the GT-R, y'all get stuck on 0-60 times and not rolling times. The GT-R gets pounded during rolling times because that 0-60 is a trick using the trans to get off the line. It reminds me of oil, ohhh my oil has this and that, and then after real world testing it wasn't so this and that. Specs on paper are not always specs in real life.
The McLaren is RWD as well, it can have 10,000hp, won't mean a thing. After 600~ RWHP, rwd vehicles just burn rubber, that's why so many platforms are AWD, the power limitations don't come in until 1500hp~ where they then switch to drag specific tires.
RC-F 0-30 1.6
650S 0-30 1.3
.3 of a second difference to 30, that could easily be undone through a good launch on an RC-F.
The McLaren is RWD as well, it can have 10,000hp, won't mean a thing. After 600~ RWHP, rwd vehicles just burn rubber, that's why so many platforms are AWD, the power limitations don't come in until 1500hp~ where they then switch to drag specific tires.
RC-F 0-30 1.6
650S 0-30 1.3
.3 of a second difference to 30, that could easily be undone through a good launch on an RC-F.
06-08-17, 11:22 AM
#33
civics do fly by all the time and i actually slow down to avoid rock chips.
Is racing a car not really trying to race, considers racing and winning? Just like the Z06 owner, he was never lined up and given 3 honks (for him to get ready) before you took off. Yea its fun and all, but its far from a win. Who knows, the 650s could hit the brakes to avoid rocks flying onto his paint at 100+ mph
Is racing a car not really trying to race, considers racing and winning? Just like the Z06 owner, he was never lined up and given 3 honks (for him to get ready) before you took off. Yea its fun and all, but its far from a win. Who knows, the 650s could hit the brakes to avoid rocks flying onto his paint at 100+ mph
06-08-17, 11:33 AM
#34
06-08-17, 01:49 PM
#36
Pole Position
Really gentleman, lets get back on topic here. I personally am looking forward to hearing more important info on the sc for our cars.
Most MAF's are based on a 5 volt system so it makes sense the maf is overloading around 6k. It may need a voltage clamp or like the gtr tuned off intake boost pressure coming off the intake. When I had a 370z with a closed deck block and a 6466 turbo my maf maxed out right around 600whp...
Most MAF's are based on a 5 volt system so it makes sense the maf is overloading around 6k. It may need a voltage clamp or like the gtr tuned off intake boost pressure coming off the intake. When I had a 370z with a closed deck block and a 6466 turbo my maf maxed out right around 600whp...
06-08-17, 04:45 PM
#37
Really gentleman, lets get back on topic here. I personally am looking forward to hearing more important info on the sc for our cars.
Most MAF's are based on a 5 volt system so it makes sense the maf is overloading around 6k. It may need a voltage clamp or like the gtr tuned off intake boost pressure coming off the intake. When I had a 370z with a closed deck block and a 6466 turbo my maf maxed out right around 600whp...
Most MAF's are based on a 5 volt system so it makes sense the maf is overloading around 6k. It may need a voltage clamp or like the gtr tuned off intake boost pressure coming off the intake. When I had a 370z with a closed deck block and a 6466 turbo my maf maxed out right around 600whp...
Last edited by RCFormante; 06-08-17 at 04:50 PM.
06-08-17, 05:46 PM
#38
Pole Position
Depending on how much they cracked the ecu they should be able to tune closed loop or open loop. If worst comes to worst tap for a pressure sensor and tune based on boost. Also I'm sure at 6psi at around 560whp the injectors are past 80% duty cycle. I honestly feel for $10k for the sc kit the motor could easily hold at least 600whp since it does have forged internals and is tune and port injected (super safe for pre-detonation) and should come with bigger injectors and bigger fuel pump..
06-08-17, 07:48 PM
#39
Most tuners would swear MAF is more accurate than MAP. Anyway, when I went from HKS FCON MAP tuning to UPREV Osirus MAF, my tuner had the same problem with 14 psi Vortech. We replaced the stock MAF with the MAF GT, which allows 180% flow over stock flow and tuned the car via MAF. 6 psi is not much, so it must be just outside the parameters. I am curious to know what cc is the stock injectors as well.
06-08-17, 08:26 PM
#40
Pole Position
I had a good friend use the gt maf's and he has tons of issues with them failing.. If you could stay with the oem ones and tune MAP would be the way to go. The gtr's use MAP sensors.. Your right though 6psi isn't much but I know what 600whp feels like too... I want to pull the trigger but will wait a bit longer for All of the bugs to be worked out..
06-11-17, 05:58 PM
#41
Pole Position
It kind of bothers me that rr-racing would release this kit knowing there is issue with the maf sensor past 6000rpm's. All the while if your motor goes they accept no responsibility and the maf is how your a/f and fuel curve is based off of.. That explains why on the video they posted of their track day why they only hit 120mph on the back straight. Before I spend my hard earned $10k I would like all of the issues worked out...
06-11-17, 08:12 PM
#42
You are on the money, at around 475 gm/s, the MAF senses the overload and instantly fuel cuts the engine, it feels like its bogged down for about 3-4 seconds and then it goes back to normal. Rafi@rrracing is currently looking through the ECU to find that parameter to override it, if there's none, then the voltage clamp will be the solution.
06-12-17, 04:33 AM
#44
Do you've any information on the following data:
Short Term Fuel Trim
Long Term Fuel Trim
Sounds like the car is going into "Protection Mode" to me with "Emissions"...
Short Term Fuel Trim
Long Term Fuel Trim
Sounds like the car is going into "Protection Mode" to me with "Emissions"...
You are on the money, at around 475 gm/s, the MAF senses the overload and instantly fuel cuts the engine, it feels like its bogged down for about 3-4 seconds and then it goes back to normal. Rafi@rrracing is currently looking through the ECU to find that parameter to override it, if there's none, then the voltage clamp will be the solution.
Last edited by 16GSF00336; 06-12-17 at 04:37 AM.
06-12-17, 09:55 AM
#45
Other than that, the car feels strong and pulls non stop from about 3.5K RPM until about around 6K RPM where the fuel cut happens, so I just shift at 6K RPM or below that. When you hit the fuel cut, the engine just bogs down for about 3-4 seconds and then it goes back to normal, which is a buzz kill.
5.19 lbs at 6K RPM, maybe 6.5-7 lbs at 7.3K RPM, so we'll see.
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