Turbo setup for 350-400bhp

[Ed_RX7]

mail sent....

[DRAGON]

I say T04S. And to give another perspective on the clutch, I think Exceddys are generally horrible grinding clutches. Ogura clutches are very good, but to be honest at that power level, you wont need that meaty a clutch in it.

[leeroy_25]

Cheers Ed,
Will try and give you a bell tomorrow. Best go and give the Mrs some attention!
One thing I wondered. I am sure all of you wil laugh.. on ebay you can get some seemingly cheap turbo\'s from the US and China! I gather the really cheap ones from china are a denifite no no, there are some OBX ones from the states that are mid range priced.. anyone got any comments on this or is it purely stick to garrett? I presume I need a T4 flange as a pose to a T3? and is divided better?
What limits will the A/r ratio give power wise.. say a 0.70 as a pose to 1.0a/r?

Thank you
Lee

[leeroy_25]

also while we are on this subject. For my power requirements will I require uprated injectors? are 850\'s big enough? What about a fuel pump?

Thanks!

[Red and Single]

I\'m on stock injectors with uprated intank pump and fpr

850\'s all round is my target setup.

[Dr-Rotor]

Hi There Doc!
I see where your coming form. but when I was talking riveablity I just litterally meant I don\'t want a turbo that needs 6000rpm to get it going and leave me with no low down grunt!

Haa totaly understand what you mean. Most medium sized turbos spool fairly quickly. The GT35R 1.06AR T3 that I use is lovely for the street. The car even has more pull than a stock TT without using the turbos. I know this as we have to FD\'s. Both motors are extended port. I have driven next to the TT & both of us only just cruised along from a stand still going to about 3500rpm before each gear change, I was ahead after an even start from the lights. Her front was at the rear of my car.
 
My girl friend has driven my car & said to me that it has alot more pull without useing the turbo when driving around town. If you want the power its there, Stand on the throttle in 1st or 2nd & it spools up very very quickly. If you are in higher gears it takes longer to spool. Eg: The TT has more pull from 100kph 5th gear cruise if you decide you want to accelerate. Single will pull in 5th from 100kph & spool but it will not spool as fast. TT would hit full boost before 3k or just after depending on your other mods from 5th, where as the single would not. However, drop the gear to 3rd & be prepared to hang on.
 
My 1.06 T3 on a dyno pull in 4th starts to make boost from 2k & gets full boost at 4k. Depending on IC setup & pipeing results may vary.
 
I would not trade my single setup for a TT. Medium Single is perfect for town driving.

[Dr-Rotor]

also while we are on this subject. For my power requirements will I require uprated injectors? are 850\'s big enough? What about a fuel pump?
 
Thanks!

 
The Japs use 850 all round due to the fact that most aftermarket injectors have a different impendance & require resistors for the PFC to control them. If you are not using a PFC, find out what type of impendance your ECU will control.
 
If you do not intend to seek more power later on then 1 intank walbro pump should be just fine. Mate that with a good quality fuel pressure reg & a set of 850\'s all round. This will be more than enough for 450hp.

[Dr-Rotor]

I say T04S. And to give another perspective on the clutch, I think Exceddys are generally horrible grinding clutches.

 
Thats interesting...do you mean that the bearings are noisey when the clutch is disengaged?
 
The D core carbon twin plate that I use is fine. It dose not grind. The bearings are a little noisey if thats what you mean by grinding. Other than that its top notch.

[leeroy_25]

cheers guy\'s,
I have a Power FC to go in.. I have found some 850cc injectors for the primary\'s but not enough for all aorund. Is it worth just doing the primarys? I am not sure how the injector setup works on these and why you have primary and secondary ones?!

I see there is amix of T3 and T4 flanges on people\'s set-ups.. I have read about the T4 divided ones being better? what say ye all? It seems the T3 is more common on the mid sized turbo\'s? what about the manifolds for them? Then what happens with the downpipe? Will I need to get one custom made or are they available off the shelf?

Also I didn\'t get any laughs or repsonse to this?!
\'One thing I wondered. I am sure all of you wil laugh.. on ebay you can get some seemingly cheap turbo\'s from the US and China! I gather the really cheap ones from china are a denifite no no, there are some OBX ones from the states that are mid range priced.. anyone got any comments on this or is it purely stick to garrett? I presume I need a T4 flange as a pose to a T3? and is divided better?
What limits will the A/r ratio give power wise.. say a 0.70 as a pose to 1.0a/r?
\'
Thank you
Lee

[Ed_RX7]

lee call me and ill go through it all with ya...cant be arsed to type

[leeroy_25]

Will do Ed.. Cheers.. this evening about 7 be okay?? At work now just grabbing some lunch!

Lee

[Ed_RX7]

gonna be watching hellboy 2...gimme a cal at about 8.30 pm
 
cheers

[leeroy_25]

Thanks for the chat Ed.. Doing my research now!

By the way.. I have jsut bought a primary rail with 850cc injectors! Hope they are what they are supposed to be. Is there a particular colour they should be? or will they have writing on them? Can someone let me know if I can run that rail alone with my standard secondaries?
Cheers
Lee

By the way. here is a link to my project page.. only because Ed hasn\'t seen it!
It\'s been on hold for the past few weeks as I have a lot of other stuff going on.. Hoping to get a bit more done in the next few weeks.

http://www.mazdarotaryclub.com/forums/showthread.php?t=42539

[leeroy_25]

Okay guys.. I have some more info and turbo options.. I have found a guy doing some borg warner turbo\'s in the states. They are based on an S200 series turbo which they have put and bigger PT67 compressor housing on. If that makes sense? the spec is: 3" inlet, 67mm compressor, P trim wheel, with 0.96 A/R. This place claims to have the first sub 7 sec twin rotor rx7! I think this is a turbo they have specifically tweaked for the rotary engine? Anyhow he has given other options of a garrett whith 4" inlet for a bit more or Master power for a bit less.. But I was interested but the Borg Warner!
Let me know what you all think.. The garret is an equivalent size and spec but the Master power has a bit large 70mm compressor. Not sure what model that relates to though?

Opinions on which route to go would be appreciated! Also do I want to make sure it\'s a tangential type housing or is an on-centre type better on the rotary??

Thank you
Lee

[Ed_RX7]

get a tangential