Posted 07 November 2023 - 02:01 PM
The blower is a YellaTerra kit. It doesn't require any upgrades from the stock GM set up. It's basically a straight bolt on kit that uses the stock ECU & MAP.
Sorry but that doesn't sound right at all. The standard MAP sensor cannot read boost at all, it only goes to 1 bar. At minimum you'd need a new map sensor and a tune.
Oh My, Don't you post alot
Posted 07 November 2023 - 03:21 PM
Agree. Minimum would be a re-tune via a new Eeprom or Eprom in the Memcal and a boost ready MAP sensor.
Oh My, Don't you post alot
Posted 07 November 2023 - 06:36 PM
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Oh My, Don't you post alot
Posted 07 November 2023 - 06:58 PM
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Posted 07 November 2023 - 07:08 PM
Edited by hanra, 07 November 2023 - 07:08 PM.
Heckler Extraordinaire
Posted 09 November 2023 - 01:38 PM
The 304 has been running just fine for the past 6 years .
The TerraCharger kit doesn't require a MAF change.
The ECU module was reprogrammed by Chiptorque for this application.
I believe they transfered the data from the VR chip (the one for the 355) , done something to accomodate the piddly little blower , & converted it to run in the VN ECU,
Something i noticed yesterday . I let it idle for about 3 mins when it started to stall . I was watching the fuel pressure gauge as it done this & the fuel pressure was dropping as the revs lowered.
Now i'm wondering if the Bosche 44 is dying.
Posted 09 November 2023 - 07:32 PM
If the primary load sensor is mass air flow rather than speed density, that would make more sense.The TerraCharger kit doesn't require a MAF change.
Have never heard of VN ECU being capable of this though, perhaps it is a VSIII/VT one if you're running MAF?... converted it to run in the VN ECU
Sounds like you may be onto something here, if you're seeing a pressure drop at low injector opening times then it's going to be bad when it needs a bit more fuel. Also worth checking the regulator, depending on the flow capabilities it could be bypassing.I let it idle for about 3 mins when it started to stall . I was watching the fuel pressure gauge as it done this & the fuel pressure was dropping as the revs lowered.
Now i'm wondering if the Bosche 44 is dying.
Heckler Extraordinaire
Posted 10 November 2023 - 11:08 AM
Statler, on 09 Nov 2023 - 13:38, said:
Have never heard of VN ECU being capable of this though, perhaps it is a VSIII/VT one if you're running MAF?... converted it to run in the VN ECU
Let me try to explain this a little better.
Purple has been running fine for 6 years with no issue. I have been using the stock ECU (albeit the chip has been changed prior to me buying the wreck that the engine came from) . It is basically a VN 304 / T5 from a wrecked VN .
The 355 was fitted to a VR . It also has a hot chip , also from Chiptorque.
The VN / VP ECU is not interchangable with the VR / VS ECU. I believe that even the wiring is different. I know that the plug for the dizzy certainly is different.
I sent the VR chip back to Chiptorque for them to do whatever they do , I expected they would copy the VR chip data onto a VN chip , therefore allowing the engine to run on the same designed chip , but in the earlier ECU.
Also worth checking the regulator,
The fuel regulator is one of those things i have already changed in this process.
Posted 10 November 2023 - 01:45 PM
I sent the VR chip back to Chiptorque for them to do whatever they do , I expected they would copy the VR chip data onto a VN chip , therefore allowing the engine to run on the same designed chip , but in the earlier ECU.
Don't know where the supercharger fits into your timeline, but the statement stands: if you're running a MAP-based (speed density) ECU/tune it simply cannot read boost with a standard (1 bar) MAP sensor. Perhaps it already had a 2 bar sensor for some reason.
Lotsa Posts!
Posted 10 November 2023 - 05:41 PM
Yes does take 2 bar map sensor.
Have you checked it for fault codes?
Got fuel pressure guage on it & done compression test to rule out basics?
Heckler Extraordinaire
Posted 22 March 2024 - 01:48 PM
Well it's running like a rocketship again. ........... but still has a little flat spot. Hmmmm.
Fuel filter element was partially collapsed which was blocking the flow. All up i probably spent 1hr fixing the issue.
That's after the car being at a local "mechanic" for 6 weeks & him being unable to fix it. That will be $880 thanks.
Chiptorque sent the chip back & it ran sweet.
BTW , i don't recommend Earls fuel components anymore.
Almost ready for Rockynats 4.
Oh ...... boost is controlled by a Microtec.
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