EMS+light fly+ram air+UD pulley=quick RX
#51
Banned
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Originally Posted by Brettus
At higher rpm you have the following happening:
waterpump cavitating (think it was you who mentioned this)and pumping efficiency decreases - therefore hp increase is not linear
waterpump cavitating (think it was you who mentioned this)and pumping efficiency decreases - therefore hp increase is not linear
Originally Posted by Brettus
alternator - not sure on this one but I think alternators have a certain speed at which they don't produce additional current therefore hp increase is not linear.
Originally Posted by Brettus
A/C - I heard somewhere that it the A/C clutch disconnects at high RPM -again I think it was you who mentioned that .
Originally Posted by Brettus
Conclusion - my argument stands
I've already gone down this road, did the tests, the drag races, the experiments.
I had pullies on all of my cars until this one.
It just doesn't amount to anything on the RX-8 because we don't have hydraulic power steering.
#53
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Probably because of the reasons mentioned above.....
Been there, dont that..... but I dont believe him until I see his T-shirt
Been there, dont that..... but I dont believe him until I see his T-shirt
Last edited by RX8PDX; 09-18-2006 at 11:23 PM.
#54
Banned
iTrader: (3)
Originally Posted by Brettus
the only reason I feel the need to convince you is because you rubbish everyone that suggests this mod works .........
Trashing someone's ideas is not the same thing as trashing them.
You need to divorce yourself from the things you believe in.
I am not attached to any ideas.
I simply follow the evidence and the logic. Wherever that takes me is perfectly good in my eyes.
The problem with stuff like this is that we become attached to things we have been sold on - because we want to believe and because we have spent our own cash.
#55
Zoom-Freakin'-Zoom
iTrader: (5)
Originally Posted by Brettus
My dynotune was postponed till Thurs & was feeling a bit bored so went out & did a couple of 1/4 mile runs on the g-tech.
Tried different launch techniques but the only way i'm having any luck with is feathering the clutch. If I try to get wheelspin I just bog down .
anyway my et is getting a little better but my trap speed - considering stock 8s dont see much above 95mph ..............................
14.46s @ 101.7 mph
Tried different launch techniques but the only way i'm having any luck with is feathering the clutch. If I try to get wheelspin I just bog down .
anyway my et is getting a little better but my trap speed - considering stock 8s dont see much above 95mph ..............................
14.46s @ 101.7 mph
the secret that works for me. with stockish tires.... 4.5 to 5k launch and the feathing of the clutch...
that trap speed is very good... what was the temp?
beers
#57
Originally Posted by swoope
nice,
the secret that works for me. with stockish tires.... 4.5 to 5k launch and the feathing of the clutch...
that trap speed is very good... what was the temp?
beers
the secret that works for me. with stockish tires.... 4.5 to 5k launch and the feathing of the clutch...
that trap speed is very good... what was the temp?
beers
Ambient was 16deg C (61F)
I'm feathering the clutch at more like 7k - feels like a good launch to me but if experienced drivers are getting the same time as me stock then I'm doing something wrong.
Edit : Oh **** - I just realised that I didn't turn off the DSC (bangs hand against head)
will that make much of a difference ?
Last edited by Brettus; 09-19-2006 at 02:02 AM.
#58
Registered
I've had an underdrive pulley for my RX-7's for years now. My current RX-7 does not have one installed even though I do own one that is just sitting there. It used to be on my old 2nd gen RX-7. There is no noticable power change with one which is why I haven't installed it. Next time I build an engine, I'll probably do it then but I'm not going through the time and effort to install it now.
#60
Originally Posted by Brettus
Tires are stock Bridgestones at 32 psi
Ambient was 16deg C (61F)
I'm feathering the clutch at more like 7k - feels like a good launch to me but if experienced drivers are getting the same time as me stock then I'm doing something wrong.
Edit : Oh **** - I just realised that I didn't turn off the DSC (bangs hand against head)
will that make much of a difference ?
Ambient was 16deg C (61F)
I'm feathering the clutch at more like 7k - feels like a good launch to me but if experienced drivers are getting the same time as me stock then I'm doing something wrong.
Edit : Oh **** - I just realised that I didn't turn off the DSC (bangs hand against head)
will that make much of a difference ?
#61
Zoom-Freakin'-Zoom
iTrader: (5)
Originally Posted by Brettus
Tires are stock Bridgestones at 32 psi
Ambient was 16deg C (61F)
I'm feathering the clutch at more like 7k - feels like a good launch to me but if experienced drivers are getting the same time as me stock then I'm doing something wrong.
Edit : Oh **** - I just realised that I didn't turn off the DSC (bangs hand against head)
will that make much of a difference ?
Ambient was 16deg C (61F)
I'm feathering the clutch at more like 7k - feels like a good launch to me but if experienced drivers are getting the same time as me stock then I'm doing something wrong.
Edit : Oh **** - I just realised that I didn't turn off the DSC (bangs hand against head)
will that make much of a difference ?
also start dropping you rear tire pressure... i would start at about 28lbs and go down and see what works best for you..
beers
#63
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I dont have the slips, but I have taken my car to PIR a few times.
And for the first few runs I kept forgetting to turn off the DSC.
It made a huge difference. I was launching from around 6K, and you feel just as I was letting the clutch out, the car would just booooog down.
I could be just me and my noobness, but turning it off made a drastic difference.
And for the first few runs I kept forgetting to turn off the DSC.
It made a huge difference. I was launching from around 6K, and you feel just as I was letting the clutch out, the car would just booooog down.
I could be just me and my noobness, but turning it off made a drastic difference.
#65
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Originally Posted by Silver_Surfer
I guess this thread is split like the syn oil issue.
#66
Had a real interesting day at the dyno today - learn't heaps .
One thing I learn't is that I will have to shout MM a beer .
In all the pulls we did I saw nothing to suggest that there was any measurable mid range gains from the pulley . In saying that I am sure that even if there was a couple of horsepower there it would be very hard to detect because no two dyno runs were identical.
I did see some small gains at higher rpm but it is too hard to tell if they are from the pulley , the flywheel or the cold air duct .
I was very sure I felt an increase at lower RPM and would just about have bet my left one that it would show on the dyno but like my man at KiwiRE says - "the dyno doesn't lie"
Perhaps what I felt was more related to the flywheel as I only really felt anything in 1st , 2nd & to a lesser extent 3rd where the flywheel has most effect.
Black line is after the tune (3rd gear pull)
Blue line is after mods but ems maps set to zero
Green line is stock
Now for the good news - we found significant gains at high rpm from tuning - will explain more about that in the powermod thread I started.
One thing I learn't is that I will have to shout MM a beer .
In all the pulls we did I saw nothing to suggest that there was any measurable mid range gains from the pulley . In saying that I am sure that even if there was a couple of horsepower there it would be very hard to detect because no two dyno runs were identical.
I did see some small gains at higher rpm but it is too hard to tell if they are from the pulley , the flywheel or the cold air duct .
I was very sure I felt an increase at lower RPM and would just about have bet my left one that it would show on the dyno but like my man at KiwiRE says - "the dyno doesn't lie"
Perhaps what I felt was more related to the flywheel as I only really felt anything in 1st , 2nd & to a lesser extent 3rd where the flywheel has most effect.
Black line is after the tune (3rd gear pull)
Blue line is after mods but ems maps set to zero
Green line is stock
Now for the good news - we found significant gains at high rpm from tuning - will explain more about that in the powermod thread I started.
Last edited by Brettus; 04-28-2013 at 04:06 PM.
#69
just another thing to add. I couldn't justify buying an expensive intake. i bought the racing beat ram air duct and cut a piece off the stock duct so the RB unit is sealed to the factory air box. I then bought a 3.5 inlet Cone filter that has a reverse cone at the tip of the filter. I poped off the air horn inside the air box along with one of the screens. Then I installed the filter and it had just enough room to close the box. The reverse cone on the end of the filter is in the direct flow from the racing beat air duct. As you can see in my sig i have a few mods already, but this cone filter mod made it sound alittle deeper and it could just be the butt dyno but it did feel like there was alittle more up in the top end. for such an inexpensive mod i highly suggest it. I would think that the stock air box with a cone filter and the RB air duct would be as good as any expensive intake. try it out and see how you like it, i did
#71
Originally Posted by ca18detsilvia
just another thing to add. I couldn't justify buying an expensive intake. i bought the racing beat ram air duct and cut a piece off the stock duct so the RB unit is sealed to the factory air box. I then bought a 3.5 inlet Cone filter that has a reverse cone at the tip of the filter. I poped off the air horn inside the air box along with one of the screens. Then I installed the filter and it had just enough room to close the box. The reverse cone on the end of the filter is in the direct flow from the racing beat air duct. As you can see in my sig i have a few mods already, but this cone filter mod made it sound alittle deeper and it could just be the butt dyno but it did feel like there was alittle more up in the top end. for such an inexpensive mod i highly suggest it. I would think that the stock air box with a cone filter and the RB air duct would be as good as any expensive intake. try it out and see how you like it, i did
#73
Just a bit of an update on this . Have spent some time at the track recently and have some good comparisons now with other cars that are normally quicker than an 8.
Stock S2000 - absolutely neck and neck fom about 40 mph - 130 mph
Stock 2006 STI Sabaru - lose about two car lengths from 40 mph - 95 mph
Honda accord Type R - neck & neck 40-100 mph
Stock S2000 - absolutely neck and neck fom about 40 mph - 130 mph
Stock 2006 STI Sabaru - lose about two car lengths from 40 mph - 95 mph
Honda accord Type R - neck & neck 40-100 mph
#74
But I like my AP pulley! Its blue! And really makes me feel pimptastic! I'm all like...look vtech boy...I gots a blue pulley...dont make me open a can of pure pwnage on you...
I really like the blue pulley...its blingtastic and add +5HP to my butt dyno..
I really like the blue pulley...its blingtastic and add +5HP to my butt dyno..
Last edited by eviltwinkie; 04-30-2007 at 11:53 AM.
#75
Since starting this thread I've done a couple more things :
Mazsport coils
Trust TI exhaust and custom dual resonated midpipe
A couple of days ago I had the oportunity to run with a practically stock RX8 (K&N version 2 only mod)
2nd gear roll from about 3000rpm right through to 9k in 3rd .
Through 2nd gear there was not a lot in it - perhaps one car length . But in third gear the difference was substantial - maybe 4-5 car lengths . As the speed got up the difference became more marked .
Mazsport coils
Trust TI exhaust and custom dual resonated midpipe
A couple of days ago I had the oportunity to run with a practically stock RX8 (K&N version 2 only mod)
2nd gear roll from about 3000rpm right through to 9k in 3rd .
Through 2nd gear there was not a lot in it - perhaps one car length . But in third gear the difference was substantial - maybe 4-5 car lengths . As the speed got up the difference became more marked .