HOW TO: Haltech Rotational Idle/Ghost Cam In Under 15 Minutes (Haltech Elite ECU - RB25DET)
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- เผยแพร่เมื่อ 11 ม.ค. 2024
- Since my last video about the rotational idle function sparked so much conversation(!) I thought I would go into more detail showing how to set it up and the process to tweak it based on your own preferences.
This is done using my Haltech Elite 2000 ECU but it should also be applicable to the Elite 1500 and Elite 2500 ECUs as well as the Nexus R3 and R5.
It's certainly not everyone's cup of tea and I even state in the video that I don't want it on all the time - so I ended up adding a switch to turn the effect on and off when I want.
Rotational idle, also known as "ghost cam", was used historically in rally cars to aid cooling however now that most modern aftermarket ECUs come with it on-board, many people now have access to this function and want to use it simply to create a lumpy idle - much the same as having large, aggressive cams.
In this video I explain:
01:49 - How to enable Rotational Idle in the Haltech Elite series of ECUs
04:40 - Injection cut example
06:10 - Ignition cut example
07:49 - Adjusting zero demand ignition timing
08:47 - Adjusting fueling
09:43 - Examples with different settings
10:20 - Using VCT/Variable Cam Timing at idle to add valve overlap
12:42 - Final settings
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Keep up the good work man sounds good
Thanks heaps for the feedback 😁
Bwhahaha I've got an SR with 260 stix in it and I've spent days trying to get it to idle nice and not go up and down rpm .. I am really interested to see how well it cools the engine down I tend to heat soak my thing on the dyno it might be nice to set a 1200 rpm rotational idle over 95 degrees coolant temp i will have play later yeh great Video mate keep at it
can anybody help me get my evo 8 setup with a lumpy idle, i got the car tuned recently and its gone now, but i use to have a really nice lumpy and girthy idle, i can navigate Haltech NSP enough if someone can point me towards the right settings.
Just be careful with the VCT as there might not be enough oil pressure at idle. For example, the SR20 requires a minimum of 21.8psi/inHg for VCT Engagement. Any less and you might throw the rockers as the VCT will be rocking back and forth without enough oil pressure!
I think I'm going to configure the trigger on is only when the TC knob is not on zero, so I have a way to turn it off without having to add an additional switch.
TC 0 = rotational idle off, TC off
TC 1-11 = rotational idle on, TC gain settings
Not a bad idea! I definitely had to mess around a bit to get my switches set up and ended up wiring it into one of the OEM switches I never use haha
Sounds great man could the same principle be used in the link g4x? Trying to set this up but there isnt much out there in terms of videos for the link g4x
I've been told by a couple of tuners that the principle is the same for Link in terms of creating an unsteady idle state by playing with timing and fueling, but I'm not sure about any of the Link terminology unfortunately!
Ive got a question does using the ignition cut off way mean that the fuel injectors will shoot out gas stil? And if so will it make it run richer ?
Yes correct, the injector still fires and send fuel into the cylinder, but as the ignition/spark doesn't happen it doesn't burn.
i turn mine on and nothing changes :( idk if my tuner got something overwriting it or like that tuner gone MIA on me too so wont reply to msgs
Oh snap that sucks! What are you using to turn it on? Are you sure your switching is set up properly?
Going to upgrade to bigger cams in the future? Poncams are cheap. 😊
I'd absolutely like to upgrade but I was out of budget for the build. It wasn't meant to include an engine rebuild along the way 🤣 but these things happen. If and when I build the RB30 block that's sitting in my garage, I'll definitely opt for a good set of cams then!
What's was really cool about this process was learning that a lot of the tricks I've used are similar to what tuners use to dial in the lump of a proper set of cams as well... I think 😁
@@StreetSyndicate keep going you're killing it 😁👍
did it really effect your engine temp at idle?
Id like to know also, in traffic I’m sitting at 90
I haven't actually tested it in a scientific manner yet as I was really just setting it up for the sound - BUT I did notice I was idling closer to 82-85 degrees sitting in the various carparks I was in, rather than the usual 85-90 degrees which is where it usually sits.
Like I said - not exactly a controlled, scientific experiment - but it was definitely interesting and warrants a deeper look in future for sure. Might do some A/B testing and make a video with the results in future 😁
@@StreetSyndicate turn it on and sit in the sun bro 🤣🤣
@@StreetSyndicatethe effect will cause the engine to run slightly cooler and for it to cool off quicker when hot
All the cylinders that aren’t firing in the rotation are just drawing in air and pushing it out, no combustion, no heat.
@@jayglasgow8054Makes sense and that is the theory! Would still love to get some hard data to back it up, mainly because I'm a nerd haha
Putting this on my stage 3 cammed miata just so it actually sounds cammed