Vp tune with crow 7741562 cam

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
wiix360
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Vp tune with crow 7741562 cam

Post by wiix360 »

Hey guys just refreshed a 3.8 with a crow 7741562 cam and a mace chip. Cams been diled in per spec sheet anyway got it in and running and run the engine in for 80ks atm its running a bit rich just going off smell and vissible fumes. Has anyone got a tweaked tune to suit or will i just neednto play with mace tune ?
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vlad01
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Re: Vp tune with crow 7741562 cam

Post by vlad01 »

I'd say more than likely the tune would be the one supplied by crow cams and in my experience is they are terrible and they are hardware protected so you can't read them, not that they are worth reading anyway as they are so out of whack that a standard tune is actually better.


Looking at your cam specs it's quite mild, slightly bigger than the stock VN series 1 cam. So I would recommend you get all the gear needed to tune yourself and start with the stock APNX 12P tune as that has spark map suitable for you cam and the VE table should be a close start.


I had the same issue with a crow cam stage 3 cam in a VN v6 engine and it was super rich, AFRs all over the shop and down on power. Retuned it from scratch with 12P and it was perfect after that, gained something like 40hp if i recall correctly.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
wiix360
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Re: Vp tune with crow 7741562 cam

Post by wiix360 »

Yea iv got the tuning gear so ill get a 12p tune for it and work on it its fairly mild just a daily car with a freshened up engine thanks for your help . Also didnt know chips were locked lol
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vlad01
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Re: Vp tune with crow 7741562 cam

Post by vlad01 »

Yeah the crow cam memcals have a sort of address scrambler chip on there which makes it very hard to get anything off them without the data being all garbled. But I have no idea why they would want to protect their tunes, they are the worst lol.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
wiix360
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Re: Vp tune with crow 7741562 cam

Post by wiix360 »

Hey iv started a 12p tune got fuel timeing and desiered idle all done anyway runs like a charm exept hot restart it revs on for a bit at 1200rpm iv tryed playing with the start up steps no luck and also it stalls into reverse when hot to revs dip low tryed playing with some settings no luck any help will be apreciated
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vlad01
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Re: Vp tune with crow 7741562 cam

Post by vlad01 »

What are the idle steps like when in park and drive on the dash display in tuner pro? I found many VN-VR cars have their steps too high from factory, meaning the throttle stop is too closed and they stall really easy when going into drive or reverse.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
wiix360
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Re: Vp tune with crow 7741562 cam

Post by wiix360 »

20 steps
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vlad01
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Re: Vp tune with crow 7741562 cam

Post by vlad01 »

That's what I aim for. So it seems right. Monitor the AFRs as it idles and transitions from park to drive/rev and vise versa. Could be something simple as too rich or lean when the certain VE cells are hit during that transition.

I know I had a similar AFR problem at a certain point during warm up on my manual VP with cam, it would blip rich at one point during warm up due to a table somewhere and it made it stall at that point just idling there as it warmed up.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
wiix360
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Re: Vp tune with crow 7741562 cam

Post by wiix360 »

cammed vp.BIN
(128 KiB) Downloaded 122 times
wiix360
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Re: Vp tune with crow 7741562 cam

Post by wiix360 »

idlr drive reverse start fault.xdl
(64.71 KiB) Downloaded 95 times

log with faults i give up lol
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