Text only | Text with Images

Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: Dele on November 23, 2007, 01:42:03 PM

Title: RX7 boost upgrade
Post by: Dele on November 23, 2007, 01:42:03 PM
Hi there,
 
Ive just purchased a 1993 FD3S RX7 and was wondering how i would increase the boost, as this is my first twin turbo car and im not that mechanically minded, im not sure how you control the boost on two turbos, is it just a simple case of buying a controller and getting it set up?
 
Also, whats the maximum recommended PSI on standard turbos?
 
 
Thank you :chat
 
 
Edit:
 
I should also add that it has an intercooler, intake, turbo back exhaust and an uprated radiator
Title: RX7 boost upgrade
Post by: Martiny on November 23, 2007, 01:46:58 PM
Quote from: Deleis it just a simple case of buying a controller and getting it set up?
 
 
 
Edit:
 
I should also add that it has an intercooler, intake, turbo back exhaust and an uprated radiator

er that would be a big NO!

The fuel system / computer (ECU) needs upgrading BEFORE you touch the boost. Mazda\'s ECU is great for running standard boost ONLY.
Title: RX7 boost upgrade
Post by: rx7veilside on November 23, 2007, 02:44:46 PM
dont touch the boost until u have a apexi pfc and a good map from a good tuner..i would suggest carl at hayward rotary if only for a chat and some free advice
Title: RX7 boost upgrade
Post by: peterwolds on November 23, 2007, 02:52:28 PM
Welcome, definately apexi/mapping done, also watch the damp/wet roads if you gun it out of a bend the back end will bite you when 2nd turbo kicks in will get a lovely view of where you came from at best.
Any pics ?
Title: RX7 boost upgrade
Post by: chrisJDM on November 23, 2007, 02:53:49 PM
your best bet is definetly a apexi power fc ecu and controller.  The standard boost is 0.8 bar, you can only put this up to probably 0.85bar with standard injectors although they would still be running high.  Ideally to run more boost on twins you need to uprate your fuel system - bigger secondary injectors and higher flow fuel pump.  

You would also need a better intercooler but i see you already have that in your list, what do you have? uprated stock mount? front mount? v mount? which make etc?

The highest boost you can really run on twins is about 1.0bar anything over that is pushing it a bit, i know some guys who have run 1.2bar but dont expect your turbos to last long
Title: RX7 boost upgrade
Post by: Dele on November 23, 2007, 03:02:12 PM
http://www.dele-himself.com/Pictures/fridaynight/1.JPG (http://www.dele-himself.com/Pictures/fridaynight/1.JPG)
 
Its a standard mount intercooler
 
Thanks for the help :D
Title: RX7 boost upgrade
Post by: peterwolds on November 23, 2007, 03:11:24 PM
Quote from: Delehttp://www.dele-himself.com/Pictures/fridaynight/1.JPG (http://www.dele-himself.com/Pictures/fridaynight/1.JPG)
 
Its a standard mount intercooler
 
Thanks for the help :D
looks like you have the best colour
Title: RX7 boost upgrade
Post by: chrisJDM on November 23, 2007, 03:56:33 PM
Quote from: peterwoldslooks like you have the best colour

yes but red is faster :p
Title: RX7 boost upgrade
Post by: peterwolds on November 23, 2007, 04:10:32 PM
Quote from: sweetiewellsyes but red is faster :p
:rollin :rollin :rollin  and what colour was the dragon car ????????/ :rolleyes:
oh yes black ;)
must say before i got mine i was so tempted with a red one that brian was selling,similar in looks to 1 on pistonheads for sale now
Text only | Text with Images