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More on the Rolls Royce build and Hellcrate motor swap

Magnified

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#1
They drop the motor in and start it using a Chevy ECU. I know if you take a salvage motor you need all the accessories, even the gas tank, for the antitheft system to allow the motor to run. Does that not apply to the crate motors?


For those who did not see the other thread, the ECU is the one that came with the 1000 HP on pump gas NA Chevy crate big block that went to SEMA (the first one released).
 

1971demon

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#2
They drop the motor in and start it using a Chevy ECU. I know if you take a salvage motor you need all the accessories, even the gas tank, for the antitheft system to allow the motor to run. Does that not apply to the crate motors?


For those who did not see the other thread, the ECU is the one that came with the 1000 HP on pump gas NA Chevy crate big block that went to SEMA (the first one released).
Cool to say the least...more bugs to work out than on Hunters porch on an August night...
 
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Thread Starter #3
I still dont see how the motor will run w the Chevy eco unless the hellcrate motor does not require the hellcat motor's full security suite to run.
 

1971demon

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I still dont see how the motor will run w the Chevy eco unless the hellcrate motor does not require the hellcat motor's full security suite to run.
One way or another..my guess it gets sorted out
 

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#5
I think GM ecu's are easier to tune . I heard all you need was a degree from any clown college to tune one .

Sent from my BBF100-2 using Tapatalk
 

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I still dont see how the motor will run w the Chevy eco unless the hellcrate motor does not require the hellcat motor's full security suite to run.
in theory, if you remove all of the hellcrate computers, all you have left in a V8 with sensors. So anything that can read those sensors and drive the fuel injectors etc, can control that setup.
 

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It’s crank, cam, ECT, and IAT sensors… fire 8 injectors and 16 spark plugs and you have yourself a petrol fired 717hp air pump!
Granted, I don’t know if the Chevy guys run as many sensors in their blowers as FCA, or if they use a throttle body for a bypass valve… but who knows these days.
 
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Thread Starter #8
in theory, if you remove all of the hellcrate computers, all you have left in a V8 with sensors. So anything that can read those sensors and drive the fuel injectors etc, can control that setup.
But there has to be more to it than that, I believe. If not, why wouldn't the wrecked HC motors be sold with a generic ECU and toss the oem center stack, gas tank, etc... that are all required for the OEM ECU to start the car and function properly?
 

camarochevy1970

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#9
But there has to be more to it than that, I believe. If not, why wouldn't the wrecked HC motors be sold with a generic ECU and toss the oem center stack, gas tank, etc... that are all required for the OEM ECU to start the car and function properly?
it could be done. Would be great if Holley made their stand alone ecu work with Hemi like they do with LS, then it is literally plug in Holley compatible sensors and off you go. At the end of the day, the 6.2 is no different then anything else. Remove the ECU/BCM and it's just an engine, and if you can control spark and fuel it will run without all the OEM junk
 

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#10
I'd think that someone that knows their stuff about tuning could use about any ECM to control a HC engine. But - the spark advance and retard under boost would need to be spot on.....fueling too. Totally different from any N/A LS GM engine I'm sure.

- Kinda neat they were able to use GM controls on a HC engine to do that.....but why put that engine in a Rolls is beyond me, but to each their own I suppose!
 
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