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Type: Posts; User: LSChev

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  1. Working on a car with the same swap. Running into...

    Working on a car with the same swap. Running into the same issue. It's throwing a code that says improper signal received from TCM.. but I didn't know these cars had a tcm. Perhaps there is another...
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    You're way out of fuel system. The ECU is closing...

    You're way out of fuel system. The ECU is closing the throttle to try and save itself.
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    Have you talked to whipple? Sounds like tuning...

    Have you talked to whipple? Sounds like tuning issues to me
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    Yes C8s are widebands, new truck also. Havent...

    Yes C8s are widebands, new truck also.

    Havent looked into retrofitting but my first guess would be that its not possible. Also not really useful unless you could get the stock computer to allow...
  5. I work at a fully professional shop and I agree...

    I work at a fully professional shop and I agree with you. The price seems absurd but this is what we're stuck with right now.. It's not like the customer could take it to another shop and have them...
  6. Lots of people assume the 19+ trucks are the same...

    Lots of people assume the 19+ trucks are the same as the 14-18 but they're not. As you found the E90 ECU is completely different. I have done a couple of 19+ but nothing with a cam so far. On the HPT...
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    Get your VT table dialed in for the cam and it...

    Get your VT table dialed in for the cam and it will go back to desired timing.
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    Pretty much everything you have mentioned here so...

    Pretty much everything you have mentioned here so far is not related to the fact that the car has meth injection.
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    No sir, o2s are functional. I have ran quite a...

    No sir, o2s are functional. I have ran quite a few LS setups on C16 with lots of miles. Haven't seen an issue as long as the tune isn't pouring raw fuel into the exhaust. May fail slightly more often...
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    Aha that is interesting! I was wondering if it...

    Aha that is interesting! I was wondering if it could be valve float. Would have the same symptoms that I am seeing. Thanks for the insight I will do some more investigating into this.
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    It also has meth. TBH we usually make this power...

    It also has meth. TBH we usually make this power with pump gas and meth. I don't push it to 23deg on those though. This was for experimentation to see if I could make more power on stock cam.

    I...
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    Yes, definitely power to be had up top by...

    Yes, definitely power to be had up top by advancing it.
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    Ok I did some more playing around.. went to a...

    Ok I did some more playing around.. went to a larger upper to see if it was belt slip. Verdict: No, it doesn't seem to slip on every run but once in a while it will lose some up top.

    I am picking...
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    Hmm yea I don't think C16 is the best fuel for...

    Hmm yea I don't think C16 is the best fuel for max power either but I chose it because it has a high stoich value (need less of it) and it prefers to run leaner than a lot of other race fuels. Which...
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    Hey thanks for your reply. This is definitely...

    Hey thanks for your reply.

    This is definitely a hypothesis I can test. With C16 I have some room to reduce the amount of meth being sprayed. I will give that a go and report back.

    For...
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    Stock LT4 Cam - HP Limit?

    Hey all,

    I am curious at what level everyone finds the stock LT4 cam seems to become a limiting factor.

    I have done about 10 Magnuson 2650 cars with stock cams so far. I am able to get...
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    I have a tune file from a 19 Denali pickup that...

    I have a tune file from a 19 Denali pickup that has flex fuel enabled. Virtual sensor. Havent messed with converting it to a flex sensor or put any ethanol in it.
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    Yes, the high side pump is mechanical so the...

    Yes, the high side pump is mechanical so the faster you spin the engine (more specifically the cam shaft) the more the pump can flow.
  19. 19+ GM Trucks - who has played with one of these?

    Doing some R and D at the shop on these new trucks. I was hoping the tuning would be mostly the same once everything is unlocked but apparently not.

    We have a 19 Denali P/U that we put a...
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    Yes, it says Trans S, fuelcut and Trans T once in...

    Yes, it says Trans S, fuelcut and Trans T once in a while, those channels are all in the log above. Problem is, they dont say fuelcut when its happening and give random revlimit when the engine is...
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    Thanks for the reply! Perhaps you could be...

    Thanks for the reply!

    Perhaps you could be more specific on what the problem with them would be? I have a good understanding of how the virtual torque tables work and I do not believe they are the...
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    2018 CTS-V unknown fuel cut when spinning?

    I am currently working on a V3. Nothing too crazy, ported blower/cam and meth. Made 710whp/800lbft. Only issue I am having is for some reason if it spins in 1st it will not shift to 2nd. I have...
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    Yep, graph worked that time. Only difference...

    Yep, graph worked that time.

    Only difference I can see in the logs is your MAF reading is showing less airflow on the leaner run. Not sure why that would be. Maybe a misfire?

    If you change...
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    I did not see a wideband channel in your logs but...

    I did not see a wideband channel in your logs but I can see that your lowside fuel pressure is dropping hard at around 4600rpm. If the A/F inconsistency you are talking about starts at around that...
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    My thoughts exactly, fingers crossed!

    My thoughts exactly, fingers crossed!
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