Super charged 8 problem
08-10-2007, 05:34 AM
#1
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Super charged 8 problem
got a member here have problem with 8 jerking when change gear from 1 to 2nd. when u do a sudden gear change it jerks. whats wrong with it?
its a 4at, rpm is around 5k rpm.
i drove the car before and it seem like doesn't produce power of a sauper charge, it feel like a 4at rotary with pulley.
its a 4at, rpm is around 5k rpm.
i drove the car before and it seem like doesn't produce power of a sauper charge, it feel like a 4at rotary with pulley.
Last edited by theboy; 08-10-2007 at 10:51 AM.
08-10-2007, 06:12 AM
#2
He's as bad as Can
He is releasing the clutch too fast??? Could be a bunch of things and there is not enough info in your post to give a better answer.
MODS, AT/MT, RPM when he shifts, does it happen in other gears?
MODS, AT/MT, RPM when he shifts, does it happen in other gears?
08-11-2007, 02:14 AM
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u mean MAF of the tuning kit used. or the OEM MAF location?
here is some photo i took. i suspect the problem is with the stock intake. the stock intake wasn't able to produce efficient air. because when it jerk, its only less than 2 seconds. and u can hear the loud vacuum sound.
also i think there should be a boost controller for this super charge unit.
as u can see the super charger should be from blitz but funny that the top manifold is not by blitz. hmmm..... shouldn't it be a set?
here is some photo i took. i suspect the problem is with the stock intake. the stock intake wasn't able to produce efficient air. because when it jerk, its only less than 2 seconds. and u can hear the loud vacuum sound.
also i think there should be a boost controller for this super charge unit.
as u can see the super charger should be from blitz but funny that the top manifold is not by blitz. hmmm..... shouldn't it be a set?
Last edited by theboy; 08-11-2007 at 06:26 AM.
08-11-2007, 01:15 PM
#9
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Benny, i don't think that a SC needs a boost contrller lar bro since SC boost is dictated by the SC kit belt pully size..... To change boost u need to change pulleys.....
08-11-2007, 01:19 PM
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effie, you stole Tiggerlee's avatar!!!!! 
08-11-2007, 09:15 PM
#11
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i hope i translate this from chinese with a readable english. lol
Last edited by theboy; 08-11-2007 at 09:24 PM.
08-12-2007, 10:46 AM
#12
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Invest in a Scan Tool from someone like: http://www.autoenginuity.com/, http://www.performancedesign.com.au/?content=scanalyser or http://www.scantool.net/.
It's a vital tool, along with a wideband, when modifying any car.
Also, check all the basics like your plugs, coils, etc. to help narrow down the possibilities. There's not enough information, like Expo1 mentioned, to really give you any help.
It's a vital tool, along with a wideband, when modifying any car.
Also, check all the basics like your plugs, coils, etc. to help narrow down the possibilities. There's not enough information, like Expo1 mentioned, to really give you any help.
08-13-2007, 01:05 AM
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a/s/l/n00dz?
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I've never heard of a supercharger needing a "boost controller" - those are for turbo's only, because you can adjust the wastegate allowing how much air gets vented back into the atmosphere. Superchargers have bypass valves, which is probably what your referring to. Getting back to your problem at hand, who tuned the car? A/F ratio? Check the spark plugs?
08-13-2007, 04:17 AM
#19
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I've never heard of a supercharger needing a "boost controller" - those are for turbo's only, because you can adjust the wastegate allowing how much air gets vented back into the atmosphere. Superchargers have bypass valves, which is probably what your referring to. Getting back to your problem at hand, who tuned the car? A/F ratio? Check the spark plugs?
like i said, the boost controller is introduced by blitz rather than other mechanics. i guess by saying for rotary car u need boost controller for not over boosting in the article means u need them.
Last edited by theboy; 08-13-2007 at 04:22 AM.
08-14-2007, 08:41 AM
#21
"got a member here have problem with 8 jerking when change gear from 1 to 2nd. when u do a sudden gear change it jerks. whats wrong with it?"
the same thing is happening with my 07 rx-8 with an MT, stock mazdaspeed cold air intake... but it is not supercharged..
the same thing is happening with my 07 rx-8 with an MT, stock mazdaspeed cold air intake... but it is not supercharged..
08-14-2007, 09:49 PM
#22
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in an artical in Option Fans magazine interview with blitz, boost controller is a must, according to the blitz technition, due to the reason rotary is a hi-rev engine, piston engine, on hi-rpm when u de-accelerate then suddenly accelerate again, its easy to over boost, if the boost is set at 0.4kg/cm2 it will cause 0.1-0.2 extra boost occurs. the only way to solve this is using boost controller.
i hope i translate this from chinese with a readable english. lol
i hope i translate this from chinese with a readable english. lol
08-15-2007, 05:33 AM
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I bought most of the Option Fans Mag from volume 50 onward, but didn't manage to get hold of that supercharge issue, i think it's volume 77 rite?? I think your friend needs tuning, Blitz Japan had warn that higher Ron fuel is required in order to counter detonation, plus hot wheather in Malaysia make it worst. why don't you ask your fren to use colder plugs NGK 5255 suggested by most forummer?