question for you, what cranking bpw tables are in the VP, are they stock for petrol or have you adjusted them for alcohol ?v6bucket wrote:Compression probably helps as the Torana is 12.5:1, but the std VP the Dato's wife has, uses the drilled std injectors on methanol & starts fine cold, like a std car.
102 - Advanced Tuning Of A Delco ECM with $12P
- Holden202T
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
No matter what the question is, the answer is always more horsepower!
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Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
- Holden202T
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
well I've just increased the crank base pulse width on the Gemini and it definitely starts a lot quicker than it did in that video, might try giving it a bit more and see was about 10 seconds this time in 14.8 degree temp
No matter what the question is, the answer is always more horsepower!
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Basic tuning of a delco ECM with $12P thread
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
They have been altered, I remember changing it after discussion on this forum, not 100% sure how I came up the the numbers but are close to 1/2 a std petrol number.
Does the sprintcar that you tune have 60lb Deka injectors?
Does the sprintcar that you tune have 60lb Deka injectors?
"Definition of a Drag Racer: A person who spends money he doesn't have on parts he doesn't need to impress people he doesn't know." - Grumpy Jenkins----- Poverty---
- Holden202T
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
yeah and I have a feeling some of its crank and injector bias tables are out
I have been waiting for him to send me a spare memcal so I can update the tune for him, he is 2hrs drive away so after the dyno most changes are mail I sometimes see them when I help my mate race at Parramatta speedway.
I have been waiting for him to send me a spare memcal so I can update the tune for him, he is 2hrs drive away so after the dyno most changes are mail I sometimes see them when I help my mate race at Parramatta speedway.
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
- Holden202T
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
so I've been playing a bit more with cranking pulse widths to see if methanol will start quicker than the 20 odd seconds it was in that video I posted the other week. I got it to about 5 seconds with the below map, now you might think that its not a huge change but the difference in the -28 degree cell is approx. 10% increase in fuel and 20degrees is about 30%!!!!
ambient temps were about 16 degrees and the motor had been cold overnight so that's pretty good for methanol
its probably also noting that the second stage table is pretty much the same increase.
I have always just changed the original tables proportionally to the stock tables to account for changes in injector size or fuel types, but this obviously shows theres more to it than that, maybe different injectors need more or less at certain temps or even fuels change that too.
ambient temps were about 16 degrees and the motor had been cold overnight so that's pretty good for methanol
its probably also noting that the second stage table is pretty much the same increase.
I have always just changed the original tables proportionally to the stock tables to account for changes in injector size or fuel types, but this obviously shows theres more to it than that, maybe different injectors need more or less at certain temps or even fuels change that too.
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
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Basic tuning of a delco ECM with $12P thread
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- delcowizzid
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
ive got 2 sets of deka 60's and both require different crank fuel values or you end up with no run and very wet plugs LOL
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem
Re: 102 - Advanced Tuning Of A Delco ECM with $12P
good job on the writeup, good read.
- Holden202T
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
yeah originally I used to have the same issues with the 202 on methanol with deka 80's, so I backed them right off so stop flooding it all the time and just haven't put the time into it since, but with winter here its seeming to be more important
thanks The1!
thanks The1!
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
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Basic tuning of a delco ECM with $12P thread
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
Well it looks like I'll have to play with some settings.
"Definition of a Drag Racer: A person who spends money he doesn't have on parts he doesn't need to impress people he doesn't know." - Grumpy Jenkins----- Poverty---
- Holden202T
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P
ok so I added another 10 % to my numbers and it really made no difference, so I guess theres a point where you get better results then after that its purely methanol is a prick to start cold
also another thing for you to check, theres a table "A/F Ratio - Initial Run A/F Ratio Offset vs Coolant Temperature" (prefixed with map a and b) these are how much it offsets the AFR when first starting, I got caught with this one not changing the numbers to methanol offsets and this can almost flood the motor after it starts! it might be somewhere to look on the dato too just to check its right.
also another thing for you to check, theres a table "A/F Ratio - Initial Run A/F Ratio Offset vs Coolant Temperature" (prefixed with map a and b) these are how much it offsets the AFR when first starting, I got caught with this one not changing the numbers to methanol offsets and this can almost flood the motor after it starts! it might be somewhere to look on the dato too just to check its right.
No matter what the question is, the answer is always more horsepower!
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread