Turbo or Supercharger
#26
HIREV8
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Phantom thanks for your thoughts. Greatly Appreciated! For my "2 cents" I am a more a thinking type of guy. What can I do to improve the 8 best all around? That is what I ask myself in general. Don't get me wrong I love hp and speed who don't, but I, like you said, want to focus on the cars strengths. I will take you advice; you seem to really know what you are talking about. I will focus on handling first. In fact, I will probably get most of my help from this forum. I am no mechanic, but I can do a lot myself. OK! What do you and anyone else recommend for suspension for step 1? I will build this car on this forum and give a list on what mods I will put on, along with other details including before and after pics, also installation pics on the mod before and after. All my decisions will be based on what I like off course and the recommendation and inputs of all of you.
#27
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if your looking for good handling all around, then your first step (personally) is tires. more specifically ones with low tread wear....120 or 140 if you dont already have so. (i really dont know what the stock tires for the AT Rx8 treadwear is, i've seen a lot of different models, different tires, it varies from model to model apparently) if you dont want tires, then sway bars are always a good choice. check out different websites for ideas for what different brands of suspension parts are. i know japanparts.com has a good overview of suspension parts. (just bare in mind that there parts are all for the right handed version of the 8). shocks and springs too.
#28
Originally Posted by StreetDreamz247
Hey Guys and Gals, if you will. I have been searching and searching and asking manufactures about quite a few aftermarket engine mods for the 4 speed auto. I was told by Greddy that the turbo was not made for the auto I seen turbos on automatics?? Can someone point me in the right direction for a good turbo or Supercharger. Also If you are a experienced street racer what should I be looking at for the very first engine mods. I am new at the RX-8. This rotary engine is a loop compared to my mustang cobra. Very Different in a good way of course.
Just my point of view:
. Racing Beat intake and duct, or Racing Beat ram duct, or Odula ram duct, or Mazdaspeed/AEM cold air intake
Note- Nobody knows which is better, but helps a bit. I have the Odula ram duct.
. R-magic air filter, if keeping stock box w/ Odula or Racing Beat duct
. ATF cooler and good AT fluid
Note- Why? Keeps tranny cool, helps it last longer, allows it to take 8,500 rpms if ECU flashed.
. 2nd oil cooler if 4AT
. Oil catch can and Breather mod
Note- Why? Pre-06 RX-8s are taking in oily vapor and bad air. 06 and up models "hide" the problem better by routing to the lower intake manifold.
. Throttle body bypass mod
. Agency Power Pulley, if staying NA
Note- Why? Faster revving. Should improve starts a bit.
. Structs
Note- Why? Better turns
. Sway bars
Note- Why? Better turns
. Exhaust
Note- Need to think about NA or FI in the future.
. Brakes
Note- Not a major issue, as RX-8 has good brakes, but something to think about.
. ECU flash
Note- Need to think about which direction you want to go, NA or FI. Cobb's AccessPort may change this thinking since you can flash whenever.... May find some HP, even on NA. Cuts speed/rev limit.
. Tires
. Supercharger
Note- Why? Boost is instant and AT needs it low because of torque converter issue. If turbo, needs to be tuned (if not made) specifically for Autos and provide boost starting at 2,500 rpms with little turbo/boost lag.
Last edited by sosonic; 04-24-2007 at 10:18 AM.
#31
Seriously.. FML..
Originally Posted by mysql101
You heard wrong. It installs just fine on the automatic. I've seen it in person.
#33
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Originally Posted by sosonic
. Supercharger
Note- Why? Boost is instant and AT needs it low because of torque converter issue. If turbo, needs to be tuned (if not made) specifically for Autos and provide boost starting at 2,500 rpms with little turbo/boost lag.
Note- Why? Boost is instant and AT needs it low because of torque converter issue. If turbo, needs to be tuned (if not made) specifically for Autos and provide boost starting at 2,500 rpms with little turbo/boost lag.
Please read this thread:
https://www.rx8club.com/series-i-major-horsepower-upgrades-93/supercharger-performance-110388/
and this thread might also be useful. Maybe:
https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/3-rotor-turbo-114646/
EDITED: To fix my horrendous grammar.
Last edited by SmokeyTheBalrog; 04-25-2007 at 09:11 PM.
#34
Original Turbo 'd Auto !!
Originally Posted by RotaryP7
I wonder how it'd sound on a AT. Since the gears switch rapidly.. I need to this in person. But yes, I went to rotaryinsider.com, the forums, and on the Greddy Turbo kit thread, it said for 6spd only. But sure, I wouldn't see why it couldn't be installed on a auto.
Thanks to MySql for his EMU
#35
Destroying Threads
well, I'm bringing this crap back to life
so, which is it? supercharger or turbo, I am looking at either blitz supercharger or the Greddy turbo, 07Auto......
so, which is it? supercharger or turbo, I am looking at either blitz supercharger or the Greddy turbo, 07Auto......
#36
Originally Posted by tajabaho1
well, I'm bringing this crap back to life
so, which is it? supercharger or turbo, I am looking at either blitz supercharger or the Greddy turbo, 07Auto......
so, which is it? supercharger or turbo, I am looking at either blitz supercharger or the Greddy turbo, 07Auto......
https://www.rx8club.com/showpost.php...1&postcount=33
#38
Seriously.. FML..
Originally Posted by 09Factor
I have the Greddy install on my auto. Runs fine. The maps had to be re-tuned because of the 2 missing injectors. Right now I'm running 6 psi.
Thanks to MySql for his EMU
Thanks to MySql for his EMU
Anyways, so how's the turbo working for you on the AT? Btw, are you a 4spd or 6spd auto?
#43
Originally Posted by SmokeyTheBalrog
Oh no, now someone else is starting the Supercharger vs Turbo charger crap again.
Please read this thread:
https://www.rx8club.com/showthread.php?t=110388
and this thread might also be useful. Maybe:
https://www.rx8club.com/showthread.php?t=114646
EDITED: To fix my horrendous grammar.
Please read this thread:
https://www.rx8club.com/showthread.php?t=110388
and this thread might also be useful. Maybe:
https://www.rx8club.com/showthread.php?t=114646
EDITED: To fix my horrendous grammar.
Below, is a comparison from a new SC vs Turbo thread. As you can see the Pettit supercharger does well below 4,000 rpm and does a decent job overall. I would expect the AFSC to have a similar line. Maybe a little less below 4,000 rpm, but close to Pettit's SC and better higher overall HP because its more efficient. The greedy kit is no joke, but the HP come higher up the rpm range.
What the twinscrew and AF superchargers could mean for the RX-8 Auto:
. Help the torque converter/brake launch limit of 2,500 rpms and 0-60 for RX-8 Autos.
Why? The SC would give instant boost, where the Auto needs it at lower rpms.
. Help with exit speed on turns.
The RX-8 is already a monster on turns. The problem is the straights. When you make really sharp turns its hard to keep your rpms up and they usually drop. A supercharger may do a better job of helping you get back up to speed from the corner and your exit speed.
. Stop and go. Passing people in traffic.
Often your rpms are going to drop in this type of situation, a supercharger could do well here.
Its not just about overall HP. The DNA centrifugal supercharger is an example of that. Its power comes high up the rpm range. It will not do much for your 0-60, but may show up in the 1/4 mile and will with the time it takes you to get to your top speed. Problem is, the RX-8 can already go 150 mph. Not too many people complain about its top speed and few are brave enough to go that fast.
So then we are talking 0-60, 1/4 mile, exit speed out of turns, stop and go, etc.... That means you want a HP graph something like Pettit (but without that little dip up top and maybe a bit higher) that is giving decent boost in the lower rpms. Pettit, has yet to come out with stage 3.
From- https://www.rx8club.com/series-i-major-horsepower-upgrades-93/dyno-comparisons-sc-turbo-115058/
Last edited by sosonic; 04-26-2007 at 10:37 AM.
#44
Originally Posted by sosonic
The RX-8 is already a monster on turns. The problem is the straights. When you make really sharp turns its hard to keep your rpms up and they usually drop. A supercharger may do a better job of helping you get back up to speed from the corner and your exit speed.
Often your rpms are going to drop in this type of situation, a supercharger could do well here.
So then we are talking 0-60, 1/4 mile, exit speed out of turns, stop and go, etc.... That means you want a HP graph something like Pettit (but without that little dip up top and maybe a bit higher).
Here's the only pettit dyno graph we have right now:
You'll notice it doesn't make 200 hp till 6,000 rpm.
Now compare that to this overlay:
Greddy makes more torque and more power sooner.
Last edited by mysql101; 04-26-2007 at 10:45 AM.
#45
mysql101, don't get me wrong, I respect your opinion.
But below 4,000 rpms and above 7,500 rpms the Greddy turbo appears to have some issues.
Now, don't get bent out of shape, the Greddy turbo is smacking the hell out of stock. Turbo will have an overall HP advantage over Superchargers. Greddy does well within a certain range, but that range may not be all that is wanted.
There is still a lot that happens below 4,000 rpms and above 7,500 rpms on the street and certain tracks. Let us not forget that installing (stronger point) and maintenance issues (weaker point in comparison between the 2), which may tilt in favor of the supercharger, but I know turbo lovers will argue that point.
Also, I don't see any Greddy turbos posting their 0-60 and 1/4 mile times. If it's really all that, even in lower rpms, than people should be proud enough of their time to post them. If it's not showing up in the short distance, than I'm thinking there may be some lag and/or rpm range issue that's holding people back.
I guess RX-8s with Greddy turbos and Pettit superchargers are going to have to go "head to head" to clarify the issue. But, at least at this time RX-8 owners are starting to have some powerful choices.
But below 4,000 rpms and above 7,500 rpms the Greddy turbo appears to have some issues.
Now, don't get bent out of shape, the Greddy turbo is smacking the hell out of stock. Turbo will have an overall HP advantage over Superchargers. Greddy does well within a certain range, but that range may not be all that is wanted.
There is still a lot that happens below 4,000 rpms and above 7,500 rpms on the street and certain tracks. Let us not forget that installing (stronger point) and maintenance issues (weaker point in comparison between the 2), which may tilt in favor of the supercharger, but I know turbo lovers will argue that point.
Also, I don't see any Greddy turbos posting their 0-60 and 1/4 mile times. If it's really all that, even in lower rpms, than people should be proud enough of their time to post them. If it's not showing up in the short distance, than I'm thinking there may be some lag and/or rpm range issue that's holding people back.
I guess RX-8s with Greddy turbos and Pettit superchargers are going to have to go "head to head" to clarify the issue. But, at least at this time RX-8 owners are starting to have some powerful choices.
Last edited by sosonic; 04-26-2007 at 11:02 AM.
#46
Originally Posted by sosonic
Below 4,000 rpms and above 7,500 rpms the Greddy turbo appears to have some issues. Now, don't get bent out of shape, the Greddy turbo is smacking the hell out of stock.
Let us not forget that installing (stronger point) and maintenance issues (weaker point in comparison between the 2), which may tilt in favor of the supercharger, but I know turbo lovers will argue that point.
But, at least at this time RX-8 owners are starting to have some powerful choices.
#49
Originally Posted by RX82
Has anyone installed a twin turbo on the 8?
also thank you for posting in this thread instead of making a new one