Rtek 750x4 now,can I go to 1000,or 1200?
Thread Starter
Joined: Sep 2005
Posts: 25,581
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From: Smiths Falls.(near Ottawa!.Mapquest IT!)
750x4 now,can I go to 1000,or 1200?
the engine(s5 TII streetport with an FD upper) works pretty good on Stock 720 x4 setting(Rtek2.1)..The injectors are RC750's(4 ofthem).
Now,I have a Rotary works throttle body(90mm butterfly) and I am thinking that the AFRs will get a bit Mixed up,
So should I Go to a 1000cc or 1200 cc secondary?
The turbo is a BNR Stage 3.
Thanks Guys.,STYX.
Now,I have a Rotary works throttle body(90mm butterfly) and I am thinking that the AFRs will get a bit Mixed up,
So should I Go to a 1000cc or 1200 cc secondary?
The turbo is a BNR Stage 3.
Thanks Guys.,STYX.
From the FAQ sticky
Injectors larger that 720cc are commonly used and can be used with any Rtek7 upgrade. For Stage 2, you can use the 720cc preset to partially compensate for the larger injectors and then you will need to use the Fuel Correction Map to compensate the rest of the way. With Stage 1.x chips, you will need to have a fuel controller like an AFC to enable you to lean out the larger injectors.
Also note that having a large difference between the primary and secondary injector size is not recommended as they make tuning the secondary transition very hard to tune. It's always better to go with 4 slightly larger injectors, than small primary and very large secondary.
Also note that having a large difference between the primary and secondary injector size is not recommended as they make tuning the secondary transition very hard to tune. It's always better to go with 4 slightly larger injectors, than small primary and very large secondary.
Thread Starter
Joined: Sep 2005
Posts: 25,581
Likes: 136
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Ok.I know about the 25% factor..Staying within that and you are OK.(so 750/1000 is good).
I am just pondering the extra Air that I am gonna get with the Throttle body.
IF I get 1200's can I Cut the Fuel Down on the secondaries?
I am just pondering the extra Air that I am gonna get with the Throttle body.
IF I get 1200's can I Cut the Fuel Down on the secondaries?
Thread Starter
Joined: Sep 2005
Posts: 25,581
Likes: 136
From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Thanks for the Responses Gentlemen.
I went ahead and ordered the Rc1000's for the secondaries.
I figured that this setup is gonna have a Fairly Good Output for my goals.
After all it is Pretty well all the "bolt on/Plug and Play" stuff that you can stuff onto this engine,without going to the next level which would be aftermarket Manifolds,Turbo,External wastegate,etc..
So this is about all I can attach before "Frankensteining" it!
Thanks for the Tips Guys.I will try to Post some pics/Video,as soon as I got the parts I ordered in,and take a test drive.
Cheers.Dave.
I went ahead and ordered the Rc1000's for the secondaries.
I figured that this setup is gonna have a Fairly Good Output for my goals.
After all it is Pretty well all the "bolt on/Plug and Play" stuff that you can stuff onto this engine,without going to the next level which would be aftermarket Manifolds,Turbo,External wastegate,etc..
So this is about all I can attach before "Frankensteining" it!
Thanks for the Tips Guys.I will try to Post some pics/Video,as soon as I got the parts I ordered in,and take a test drive.
Cheers.Dave.
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I have 750/1000 with my rtek currently. The transition is almost unnoticeable. The trick is to get the staging to the same rpm as the switch from one fuel correction cell to the next. I think I set staging to 3584. That is the low end of the correction point for that rpm range. If have staging in the middle of rpm range for that cell and you have corrections for the larger injectors, the lower side of staging in that cell will be lean.
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