uh--- i dont have that kind of problem. I dont know why--but mine does well in traffic etc. I do run the act pro lite flywheel and I have the s2 trans with the 4:44 diff. I do idle at 1.1K
I have been thinking about changing because of the rapid lost of rpms while shifting during DD.
i probably will not change it out for a while--but just thinking about it.

I'm sure all that SC drag taking away what little torque you have at low rpm has no contribution

8.5 PSI an alls well :)

Ahhhh that's cute!


Post up when your running so real boost ;)

Dude that 0.5psi makes all the difference!!!

piss takers !

haha good work mate, any news with your flash limit thingy?

Nah - current tune is doing the job . Not really motivated to do much with it right now

Get it fixed so I can get mazdaedit too haha

I dont want CELS :(

5th is taller than 6th?

http://www.palzoo.net/file/pic/gallery/1311_view.jpg

Yes .... can't see any drawbacks with running the 5 speed in this application

once you are pass 100 mph--that 5th gear will kill you:)
Just buy smaller tires

Why ? There is plenty of power to wind it right out .....

aero gets significant after about 100mph. Gets really significant after 120mph. Now this is on just the GT model without any oem or aftermarket aero body parts.
I run out of 5th gear on the track ( I shift at 8.2K/tires 245/35/18) and when I shift to 6th--it just slows big time. But to tell you truth i dont like just the oem body after 135mph. It needs help.

/\ It's not like i'm tracking it much these days anyway . For what i'm using it for ... it's great ! I will say this though - the 5 speed box doesn't feel as nice as the 6 .

when do we get video? You turbo guys are so mean

I have some in cab video on youtube when doing my tuning logs.

I'm not sure how to get to your youtube page Bee... Can you link me?

and there you have it. Thanks WCS

thanks guys..now i can dream about going boost. :)

i have some track vids if yall want to see them?

we're pooping on his thread....
pm me a link OD.
I'll get to meet you in person at TGPR. I wonder if you're as old as everyone says you are lol

that's not even as fast as my NA RX8 :squint:

It says 2nd gear WOT but judging by the 60mph+ he's right it's probably 3rd

Back to the thread ...

Tweaked it up to 10PSI last night and have to say I'm disappointed in how the car is performing .
Sure - it's quick . But my old setup was spooling up quicker which really made the car feel like a rocket ship . Seems it's taking a good 600 rpm longer to reach full boost now . This could be from the port mod or the larger compressor wheel or a combination of the two.
Top end is ok but not really seeing anything exciting there yet . Still a ways to go there .

On the log below you can see it reaching full boost (10psi - ish) where the blue line is at 4200 . Old setup would do that at 3600 .

https://www.rx8club.com/attachment.p...1&d=1358535534

oops - didn't even look at the video . It was 2nd

maybe there is a small exhaust leak?
its amazing how turbo size makes a difference

Remember discussing/arguing over this with MM a while back . He was saying that if the turbine is the same size but you increase the compressor wheel size , spoolup wont change . Not sure what is going on here - if there were an exhaust leak I'm sure i would hear it .

It was second way back when I had a boost leak lol. Ill quit crapping in the thread.

I'm sure he would argue about having never said that since as a general statement it would not be true in all cases. Specifics matter.

edit: never mind, the turbine was clipped, of course it is coming up later now


.

Turbine was already clipped - no change there .

except that now you combined it with a larger compressor wheel so the dynamics are all different i.e the specifics matter

comparing boost without temperature = pointless exercise, the flow could be the same or more if the discharge temp is lower, boost pressure without reference is a meaningless number

you need to be comparing vehicle speed vs time in 6spd-5th vs 5spd-4th to have an accurate performance comparison, with the trans change you jacked the gearing around so the "feel" between now vs then is not valid

I believe the conversation was around the 3071 vs 3076 - a similar proposition to what I have done .


Not sure why you brought this up ?

Yes - I am fully aware that changing the ratios will change the feel . I don't have logs from 5th gear on the 6spd (cuz that would be suicidal) but can fairly accurately compare load at various rpms - which is what I was doing.

it's easier to say that you're a genius and walk away than spend several weeks arguing about why comparisons that lack a common reference point are invalid

the usual suspects will be happy to enthusiastically lap it up and ask for moar just the same

I don't know what you are trying to achieve here . I stated i was "disappointed" yet you seem to be coming from the angle that I'm saying " ZOMG it's fantastic !" and wanting to shoot me down ? Que Pasa ?

I knew that doing too many things at once was a bad way to get a good comparison . But I wasn't going to do one thing at a time just to please the likes of you . It is what it is - if the result is good - i'll talk about it . If that upsets you - tough . BTW - I've been driving and tuning turboed RX8s for 4 + years now and have a pretty good feel for how things interact - how about you ?

nobody is trying to shoot you down, I'm trying to figure if you made progress or not and without a valid reference there is no way to tell

Well all i have is :

*Seat of the pants - from years of driving one of the best performing turbo 8s on the forum.
*Load charts
*maf charts
*Virtual dyno


And all i'm saying is ................. i'm dissaointed at what i am seeing so far (in regards to spoolup )

Spoolup is really the only thing I've made a definitive comment on so far .

brettus, when are you going to get some video up?

/\ what would you like to see ?

edit: sorry, thought the what would you like to see comment was directed at me

based on the conversation you don't really collect it, 3rd gear between the two transmissions is close but still enough to skew it in the 6spds favor, but even then the tests have to be run over a level road and preferably under similar weather conditions or you'll be trying to factor that in too. That might be a best case option.

I've been doing this a long time to which is why I don't trust my own butt dyno let alone yours, so it's not personal. I've got maps and logs out the @ss WRT testing, it's not fun or easy, just necessary if you want anything close to a reasonable assessment on real performance. In the end it's all about assessing velocity change vs time change. Everything else is noise.

I think he does get it Team. I think he saying that it simply isn't performing how he expected.

I would like to see anything really. WOT runs mostly. REally, whatever you have time to video.

Here is one from a few years back .....

How about i put it this way - I'll KNOW when I have a car equal to or better than what I had before because of certain key indicators . The main one being ... ZOMFG ! this car is quick sensation . Or the ... oh dear my tyres can't get traction in 3rd gear and i feel like I'm in a F&F movie kinda thing !

No ? ..............oh well guess we'll never know then . LOL


BTW - I'll be putting it on the dyno when i know it's better than it was before - I'm certainly not there yet .

many changes happened at one time--engine and drive train.
Knowing you --in time you will drill it down piece by piece. Meanwhile it is interesting and fun to speculate the ifs and whys.
Dont get frustrated--get busy:)

Fixed a boost leak - red line is run I did tonight - blue from a few days ago .

gained 20 g/s and 50 hp on virtual dyno :) Note how much quicker the rate of rpm climb is .

Top end is feeling ........................ very quick ! At least equal to anything previous and 15 g/s more than I ever did on the old setup.


Edit : fixed red vs blue


https://www.rx8club.com/attachment.p...1&d=1358927996

Sorry Brett I'm a bit lost and a bit TL;DR

The Red a Blue lines are Maf g/s correct?

Because I think you've got it backwards ... red line is what you did tonight and the blue line a few days ago

Virtual Dyno calculates the hp based on logged acceleration and some known facts about a car. If used on the same stretch of road, it should be fairly accurate for comparison runs.

thewird

Bah - yeah, what you said !

Hello brettus! Nice to see that you still work with your RX-8.

Its probably posted earlier but why did you decide to redo your setup? Some breakdown?