My G-Tech Numbers
03-25-2007, 01:03 AM
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Originally Posted by Charles R. Hill
So the factory fwhp is 230?
03-25-2007, 11:56 AM
#28
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In europe the bhp is 228 & I would bet my left ******** that it is in the us, maybe less 
You seem to have more issues with the renenis than a uk spec, is it fuel grade or software?
You seem to have more issues with the renenis than a uk spec, is it fuel grade or software?
03-27-2007, 07:29 PM
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Originally Posted by stuartm
In europe the bhp is 228 & I would bet my left ******** that it is in the us(maybe not )
)
05-08-2007, 11:18 PM
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I recently ran a 15.03 @ 97 MPH with my G-tech. This was my second pass out of two, with the first being a 15.60 @ 91 MPH. Both runs encountered a lot of wheel spin, and looking at the MPH I think a mid 14 is a done deal with a little practice.
05-09-2007, 10:05 AM
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05-09-2007, 01:43 PM
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Frankly, I really don't care too much about losses or how much I started with power number wise. I just care about what was my beginning trap speed, and how much has it improved. Right now I'm NA and could care less. But right before I go FI I will get a baseline trap to measure my improvements, or lack.
05-09-2007, 11:32 PM
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Although I think the factories claim is a little optimistic, its highly car dependant. These cars seem to dyno bizzarely inconsistently from one to another. They also, as mentioned many times before, seem to vary widely in terms of fuel economy.
Of the two pulls done by stock rx8s at my local DynoDynamics dyno, the HP ranged pretty wildly. The other owners RX8 pulled in the mid 160s, and mine in the 180s (the dyno dynamics is about 7% lower than a mustang dyno and about 15% lower than a dynojet). Both had nice looking curves with the usual dips and no signs of misfire etc.
As an interesting side note, I compared my recent pulls to those of stock wrx pulls performed around the same time. Surprisingly the RX8's peak power was higher than pretty much all of the stock wrx's. Granted the power band was narrower and the torque was much lower. The WRX I believe is rated at around 225 fwhp. So the Mazda claim while high, isn't super outrageous when compared to other industry claims. I think there is just a general HP correction inflation that plauges alot of these cars. People get too fixated on numbers.
Of the two pulls done by stock rx8s at my local DynoDynamics dyno, the HP ranged pretty wildly. The other owners RX8 pulled in the mid 160s, and mine in the 180s (the dyno dynamics is about 7% lower than a mustang dyno and about 15% lower than a dynojet). Both had nice looking curves with the usual dips and no signs of misfire etc.
As an interesting side note, I compared my recent pulls to those of stock wrx pulls performed around the same time. Surprisingly the RX8's peak power was higher than pretty much all of the stock wrx's. Granted the power band was narrower and the torque was much lower. The WRX I believe is rated at around 225 fwhp. So the Mazda claim while high, isn't super outrageous when compared to other industry claims. I think there is just a general HP correction inflation that plauges alot of these cars. People get too fixated on numbers.
05-10-2007, 10:19 PM
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I didn't really pay much attention to the RPMs, but if I had to guess I would say around 6K with a feathered out clucth to WOT.
Traction was a real issue, but on a street I didn't really expect much.
I used to drag race my RX-7 and it took a while to get the feel of the clutch slipping yet pulling. Without turbos, the RX-8 feels very different.
I'm going to try a lower release RPM with more feathering to WOT and see if that gains a better ET.
It's such a fine line between wheel spin, bogging and acceleration that I'm sure it will take several passes to get a clean low ET, but I have no doubt it's in the car.
Traction was a real issue, but on a street I didn't really expect much.
I used to drag race my RX-7 and it took a while to get the feel of the clutch slipping yet pulling. Without turbos, the RX-8 feels very different.
I'm going to try a lower release RPM with more feathering to WOT and see if that gains a better ET.
It's such a fine line between wheel spin, bogging and acceleration that I'm sure it will take several passes to get a clean low ET, but I have no doubt it's in the car.
05-11-2007, 01:16 AM
#36
I am curious to see if this technique works as well for you as it does for me; while staged, hold the rpm's at 5K. While quickly releasing the clutch pedal, but not sidestepping it, floor the gas pedal. The objective is to get clutch lockup around 7-7,500 but not totally hammer the driveline. I have used this method for years, even with nitrous, and I haven't broken anything. Not even my trans. What it allows is full-throttle 7K launches that don't burn the clutch disc. Let me know how it goes.
beers
05-12-2007, 01:59 PM
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I think its sort of a damned if you do damned if you don't situation. The tire roasting launch is hard on other driveline components, just not the clutch. As noted by other members of this board, I'm exceedingly paranoid about the strain put on a car by launching it. Probably to the point of being a little nuts. I guess its all the research I did in deciding not to buy a CTS-V or a GTO as they eat diffs when they are launched.
05-12-2007, 03:19 PM
#39
old and uncoordinated.. are you mocking me????? i thing you have all the good karma points i lost somewhere when it comes to the car.... not that i have had problems.
just from dirt riding you learn to feather the clutch to keep the traction where you want it... and it seems to work with the car as well.... right now everything i do is about the roll on... no stress.
just got back from helping someone with bad 5th and 6 syncros... glad i have a spare tranny...
beers
just from dirt riding you learn to feather the clutch to keep the traction where you want it... and it seems to work with the car as well.... right now everything i do is about the roll on... no stress.
just got back from helping someone with bad 5th and 6 syncros... glad i have a spare tranny...
beers
05-15-2007, 12:10 AM
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How can anybody be concerned about their driveline after all the hammering I have done to my car over the past three years? I have literally TRIED to blow up my diff by having wheelhop during nitrous use and it still won't die. My tranny-I have missed I don't know how many 3rd gear shifts and it still feels smooth. Of course, I discovered that the problem wasn't me getting old and uncoordinated. It was the pedal bracket. Since then my shifting is smooth as glass and I never miss a gear.
Drag radials/slicks are a different story, though.
Drag radials/slicks are a different story, though.
I'll take your word for it on the hard launches as few people on this board are as credible as a source. That said, I think I'll remain a wuss and not launch my car. Although its still under warranty... See, now I've been corrupted!
05-15-2007, 12:14 AM
#41
Does the 8 get a lot of wheel hop with hard clutch dumps. Never really launched mine, always get on it from a roll. I assumed since the synchros were a little weenie, that the rest of the driveline followed suit. Totally unfounded conclusion apparently.
I'll take your word for it on the hard launches as few people on this board are as credible as a source. That said, I think I'll remain a wuss and not launch my car. Although its still under warranty... See, now I've been corrupted!
I'll take your word for it on the hard launches as few people on this board are as credible as a source. That said, I think I'll remain a wuss and not launch my car. Although its still under warranty... See, now I've been corrupted!
beers
05-15-2007, 12:23 AM
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05-15-2007, 01:53 PM
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For me, even with nitrous use, the RB swaybars eliminated the wheelhop under 99% of the conditions I have encountered. It was the once or twice that I have run into it that I decided were my chances to try and blow the rear diff. Still works great. I have never liked the factory tires so I use Nitto-555 Extremes. Pretty decent tire.
one of the last things i have not done.. go figure..
beers
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