Hey guys i am a absoulote Newbie with the Rotary engine and i am looking to tune my N/a engine a little bit, i have removed the air pump and i have a straight through exhaust system, and a hks air filter. can anyone give me any advise for more power? also i have not taken off the (what looks like) the egr do i need to blank all that off?
thanks guys chris
Exhaust
Manifold replace, de-cat and a cat back exhaust. This removes the thermal reactor (bath type manifold) and the exhaust will smell, but performance takes a big step forward.
Intake - with EGI
Filter upgrade, but ensure you have cold air routed to it. On the throttle body, you can remove the secondary butterflies and flow the throttle body. (Have one already done if you want to purchase from a 1990 6 port - open to offers)
UIM again this can be flowed and port matched to LIM (have one of these also)
If a six port, you will have the secondary ports, the design of this depends where the engine was made, the UK models is a very different design from those from the states. The states used a sleave valve the uk used butterflies, if a sleeve valve pineapple racing do a gas flowed one. Do not remove the 6 port system, you loose lots of bottom end torque.
If running stock ECU get it on a rolling road and complete at least three power runs, the unit seems to self learn your driving style, I made 30 bhp by this process - as above with touching 6 port valve 170 bhp at wheel
If not EGI side draft weber or dellorto or holley down draft
Hope this helps
John
lol ok you lost me the parts you have for sale will aid me? if so how much would you like?
oh by the way its a 1990 on a g plate uk
is it a UK car? if so it was probably just sold late, meaning it will be a series 4 car not a series 5 car like the americans.
look at this thread http://www.mazdarotaryclub.com/forums/showthread.php?t=50898
thats a street port with throttle bodies and a proper full through exhaust and hes aiming for 190ish i think.
when you say you exhaust is full through, have you got an uprated header which eliminates the baffles on the engine?
also, unless you plan to map/tune the car (for which you need an aftermarket ecu i believe) your best best is just just keep the stock intake with an after market pannel filter. These are available from mazda rotary parts.
I have a flowed throttle body and upper inlet manifold - £50 plus post.
Have a search on Rx7club.com, for details on what has been done to remove secondary butterflies.
I ran with completely open (but silenced) exhaust, pipercross filter, no emmisions gear, or air pump on a standard ECU with no issue. Had it dyno\'ed and no air fuel ratio issues.
Now running a side draft weber - hence reason for sale.
There is also plenty you can do with the ignition system to upgrade - wasted spark on leading coil with CD ignition - helps clean up emmissions, good idle and starting, also some power improvements.
Do plenty of reaseach on US sites - racing beat has some good info.
Quote from: johnm;578559I have a flowed throttle body and upper inlet manifold - £50 plus post.
Have a search on Rx7club.com, for details on what has been done to remove secondary butterflies.
I ran with completely open (but silenced) exhaust, pipercross filter, no emmisions gear, or air pump on a standard ECU with no issue. Had it dyno\'ed and no air fuel ratio issues.
Now running a side draft weber - hence reason for sale.
There is also plenty you can do with the ignition system to upgrade - wasted spark on leading coil with CD ignition - helps clean up emmissions, good idle and starting, also some power improvements.
Do plenty of reaseach on US sites - racing beat has some good info.
i will take it matey if it will fit give me a text 07811052583
As siad racing beat do some very nice bits for the NA, Headers are a huge part for getting good power from the N/A. RB do 2 versions for them. have alook at their website.
We have 50mm ITB\'s on ours with RB Dell\'orto upper inlet manifold. Not had it running yet but if you want alook then head over to our thread "new roundaround" in gen2 section
Chris
Email: jemtech@tiscali.co.uk
John
Take a look here for the air pump plumbing and blanking plate
http://www.negative-camber.org/crispyrx7/fc/fcpart5.htm
Butterfly removal
http://www.negative-camber.org/crispyrx7/fc/fcpart8.htm
Have removed all the lumps and bumps and square corners also