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Jesse DaBears
Well-Known Member
Ya probably just the boost safety issue then.
Use a draggy and lets see what its doing 60-130. Typically for your setup would see low 8s 60-130
Got_M
Well-Known Member
TBH I think the DA had a bit to do with that. IAT was like 140 before my second pull. Left in 2nd. Also has the stage 3 xhp trans tune. I still don't see 11.8 being a bad time considering the 2.0 60ft. 2200DA.
Maybe some IAT spoofing is in order?
Jesse DaBears
Well-Known Member
If you start messing with IAT spoofing your ECU PSI will be different meaning your additive boost is going to be much different than what you want. This is where I was mentioning logs only tell one side of the story. If you want to go fast (especially with a car adding meth) you have to put performance metrics to things.
IMO run a draggy with where you are at. Then pull some boost and see if it goes faster or the same...
Got_M
Well-Known Member
It's not running low 8's unfortunately.
I think we are going to turn it down just a bit and see if 60-130 gets better. Deep into the 8's sounds good to me.
Jesse DaBears
Well-Known Member
Whats it running? Post your draggy and log.
ColonelAdama
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I think it was 9s?
Think we're gonna drop it to +7 additive next and IAT spoof at 80 or so.
Jesse DaBears
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Ya thats real slow for ethanol and meth. Best of luck hopefully I helped point you guys in the right direction.
Highly suggest you guys work on understanding these cars and how they work not just how jb4 works. More boost doesn't always equal more power. Just broken parts and empty wallets
youll end up like @zrk slow and broke. Im just fast and broke
ColonelAdama
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What else makes power besides boost and timing then? Provided timing (IAT and ecu_psi "cylinder fill") stays constant as the boost increases, i see no reason for a power drop.Ya thats real slow for ethanol and meth. Best of luck hopefully I helped point you guys in the right direction.
Highly suggest you guys work on understanding these cars and how they work not just how jb4 works. More boost doesn't always equal more power. Just broken parts and empty wallets
Obviously at a certain boost level, IATs climb more quickly and drop base timing. I am pretty well read on how B58 logic works and have read several ecutek, bm3, mhd guides. I understand the common lookup tables.
i don't know how to use tunerpro or actually tune by any means, but know enough to know how the DME interacts with JB4.
I am just assuming your advice is to get IATs down.
Got_M
Well-Known Member
What have you seen be the sweet spot for e blends on a charge pipe meth injected car? e30? e40? Doesn't the meth also act as octane booster? Also, it sounds like you are saying less boost = better timing? Thus 60-130 times dropping?Ya thats real slow for ethanol and meth. Best of luck hopefully I helped point you guys in the right direction.
Highly suggest you guys work on understanding these cars and how they work not just how jb4 works. More boost doesn't always equal more power. Just broken parts and empty wallets
zrk
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It's not like I wanted 65psi. It just sorta happened. so.. go home with that.More boost doesn't always equal more power. Just broken parts and empty wallets
Jesse DaBears
Well-Known Member
The issue is understanding it all. Just because your adding boost and timing looks fine that doesnt mean its going to go any faster your just beating the car up and wearing parts faster. You have the car running 25 PSI and its basically running 12s at the track. This is where I probably should have said more boost doesnt always equal = faster car. I dont think IATs are your issue me personally id mess with other things first. THE EASIEST way to do this like i said is just draggy and log every change. Instead of just ramping more and more boost because timing looks ok.What else makes power besides boost and timing then? Provided timing (IAT and ecu_psi "cylinder fill") stays constant as the boost increases, i see no reason for a power drop.
Obviously at a certain boost level, IATs climb more quickly and drop base timing. I am pretty well read on how B58 logic works and have read several ecutek, bm3, mhd guides. I understand the common lookup tables.
i don't know how to use tunerpro or actually tune by any means, but know enough to know how the DME interacts with JB4.
I am just assuming your advice is to get IATs down.
Start closer to 20 psi see what it runs if its running the same time then why blow all that extra air? It sounds cool that hes running 25 psi but hes car isnt moving and responding. Get what im getting at?
Jesse DaBears
Well-Known Member
With meth depends on the set up and what customers wants be we run a lot more ethanol that that. E30-E40 is what I typically have customer run on no aux fueling cars.
