Hi folks (I will PM Hal this question also),

Does anyone know if the Haltech cuts spark even when you select a fuel cut rev limiter? I would ideally like to do both for the main rev limiter. In a car running cats and spraying methanol, hitting the rev limiter with a fuel cut alone could be a disaster (I think).

(I know, I know - don't give me a hard time about running cats, but I've got 100 cell metallics that really clean up the smell and don't hurt power badly at all so I'd like to keep 'em on)

 

i'm in for the answer also

 

I've only got the fuel cut to work on mine and have tried doing ignition cut but cannot get it to work and asked around for about 3 months about it and also talked to Hal about it personally at the track one day and if I remember correctly we can only do fuel type cut. At least in an HR car I know, DE may be different.

 

with cats, you def want fuel cut, which is i'm pretty sure what the haltech uses for its main rev limit. I see your issue if you hit the limiter and are still injecting meth. Since your system is 2D, cant you define rpm range as well and make sure that the pump shuts off a hundred rpms or so before the rev limit?

you can choose either for the 2 step. guys with no cats wanna use a spark cut though for that. But i havent tried that yet to see how it works.

 

I have no cats and would much rather use spark cuz but can't get it to work.

 

The aquamist HFS-6 is stupidly simple to dial in, but that simplicity results in some limitations. I could insert a window switch, but otherwise all aquamist units rely on fuel injector pulses for determining the PWM of the high speed valve as the primary input. Thus the spray is automatically related to anything that affects fueling. Cut fuel and you cut spray - of course the spray is pre-TB and the fuel is at each intake valve.

Hal responded via PM - he is investigating...

 

That would be bad. I hope this is just a HR issue.

 

It is currently fuel OR spark.

 

especially if you have cats, i would recommend fuel cut. i look at it this way if you cut ignition your injectors are still spraying and with high engine temp it will combust and unburt fuel may wash your motor and kill your cats

 

Well it seems that cats are not conducive to a methanol injection set up. I will have to either switch over to test pipes again or just leave it on pump gas with the cats in place. Too bad - there would have been no harm in cutting spark and fuel together instead of just fuel.

Thanks for getting to the bottom of it Hal! Greatly appreciated.

 

I tried cutting ignition on mine but never could get it to work but fuel works just fine for now, no more than I use it...

 

Maybe sticking to a 50/50 W/M ratio (by volume) is the best bet. I don't think it will detonate like gasoline regardless of AFR.

 

close, but it wont wash your motor, it can ignite in the turbos and burn up the cats (ie anti-lag or bad misfire)

 

another question is,

so if using fuel cut, what is the timing doing during that time. say you are at 20* WOT and hit the limiter, is it going to stay at 20* during the fuel cut until your boost falls outta those cells?

Does anyone know hoe you can pull timing during shifts as well with the Haltech? They can do it on the AEM boxes on the supras. Basically its like anti-lag between shifts to keep the boost up.

 

If the I/O box comes out, it might be able to work for what you want...

 

+1000

 

ya we'll see. since the PnPs are different than their normal lines, who knows what we'll get. not to mention the full rewire of every sensor if the below pic is accurate.

 

I have a CAT5 line that brings in voltages from multiple different sensors from the engine bay down to near the Haltech. Just waiting on that I/O box. Thanks for the pic - hadn't seen it before. The plat pro plug in box looks huge.

 

where can i learn more about these other units? just addons for haltech?



edit, top one looks like a CAN brain interface unit, second idk, 3rd more sensors addon

 

you cant cuz apparently all the shops that saw these at SEMA and PRI cannot be bothered to post anything about them

you will need the CAN hub to go to the haltech and the input/output box for sensors and other triggers. Stuff that is already included standard with ProEFI and Vipec