Drag Racing Data Logs, what I look at! Holley EFI

This is what we data log and look at between rounds! EFI logs a bunch of good info, but depending on how much time you have in between rounds, this determines the priority of the info you review. Don’t forget to look at the spark plugs and video! This is a long video, but I hope you can learn a few things from it!

[@bryanburch2135]

I just found your channel. I’m not a drag racer but I’m in to cars and love learning, it’s nice to see someone out there who will still teach and explain. Thanks!!

[@matthewvarnam4302]

I like the way turbo John shows and explains why he did the change and what will happen to the car when he makes them changes. It helps to learn too.

[@kolemieux]

John - GREAT VIDEO and thanks for sharing it with us sir!!!! Sorry for your issues but know you will be back soon!

[@luismercado8689]

John you got some great content for go fast guys. Keep it up brother

[@jasonstrester]

Thank you!!! So helpful! Most are so secretive about data. Im having so much trouble with boost leash. Im close to the same car & setup but my boost is all over the place. So inconstant. Im must have got a defective leash.

[@TTBBC]

Very cool channel John very informative definitely will continue to watching all your vids keep the Holly tune and datalog reviews coming please. Thank you.

[@TurboJohnRacing]

Thanks

[@stevekissel605]

Great vlog. Like your endings.

[@TurboJohnRacing]

Thanks

[@indianacountry5352]

Great video! Nice for some informative videos for poor guys like myself.

[@TurboJohnRacing]

Thanks

[@livetorace163]

I'm really enjoying your channel. I hope someday I might be able to get up yalls way and race with you.

[@TurboJohnRacing]

Thanks, yes we have lots of local action.

[@blackman8795]

Another good video as always

[@TurboJohnRacing]

Thanks

[@deondimicks8159]

Sweet baby jesus 39 psi damn

[@supercharged6771]

Thank you, John

[@mikem9335]

Nice Videos John. Thanks for sharing your infor. This a Grudge Car/ NT car?

[@mikem9335]

Your data log still shows your ET and MPH in the beginning of the video Just wanted you to be aware of that. Thanks for all the information videos

[@TurboJohnRacing]

Thanks, that was a fake data log name, lol

[@ghud3701]

Awesome vids john

[@TurboJohnRacing]

Thanks

[@ChevyMustang1]

I agree Holley does make a good product but for me I'll stick with my Holley carb as understanding and tuning fuel injection it is out of my league I'm lucky I can turn on a laptop let alone tunic hour from 1 LOL. Great job on the videos keep up the great work

[@TurboJohnRacing]

I was blow thru carb for years! Loved it too

[@MET90LX]

Take some classes...?

[@TurboJohnRacing]

That's a great point, there are some good efi classes out there. It really is just jumping in an playing with the software and figuring out how to maneuver. For the Holley, you can download the software for free and learn it before you even buy anything.

[@177SCmaro]

I was a complete noob the first time I fired up the Holley HP on my Coyote. While I still have a lot to learn Holley does a lot of the tuning for you. You just have to know what to tell it that you want in terms of air/fuel and spark at it does what it can to make it happen.

[@turbomonza1561]

hey @turbojohn could you use a terminator x with transmission control to have more inputs and outputs ?

[@mitchdenner9743]

🤯

[@randallslocum5252]

I make a pass and for some reason I have three data logs for the same pass the memory of all three is pretty close to the same why do you think that’s happening

[@Joshsmithits]

What’s ur timing like in the 40psi range?

[@TurboJohnRacing]

About 23degrees. This is on M1 fuel, I think compression is right at 10.5, 3.9-4.0 a/f ratio. These heads are slow burn though, so read the plugs. And only 1/8 mile passes.

[@bfromthed]

The first thing I noticed is that TPS never goes to 100%. Is this just a sensor glitch or was it really not at 100%?

[@TurboJohnRacing]

Me just not pushing it down all the way or the sensor needed recalibrated

[@bfromthed]

@@TurboJohnRacing perhaps you could calibrate a light on the dash so you can visually that only comes on when it's 100%?

[@TheMoody876]

What do you gap your rings at for 39psi. I have a 4.125 bore

[@TurboJohnRacing]

.035

[@jasonstrester]

John! Do you still use boost leash? I messaged you. Like to pay you to help me with my boost dips nobody can help me with. Randy from boost tried without success. Planning to switch to holley for boost control since nobody can help me.

[@SpooneyFranki20]

You kept talking about back pressure. Why was that so important with some pressure

[@Joshsmithits]

Bryan .Rawls lower back pressure= more efficient turbo. Higher back pressure = more heat & less power, the motor basically sucks hot air back in threw the exhaust durning high back pressure events, trying to reuse the already burnt oxygen & fuel.. not good for power at all. Lowering the back pressure, via properly sized turbo/turbos, helps HP tremendously!

[@SpooneyFranki20]

BOOSTEDROK thanks for clearing that up for me

[@TurboJohnRacing]

Backpressure is the frenemy! You have to have it to get the turbo to work, but too much and it's party over. Camshaft events make a big difference to help reduce backpressure. On all of my cars, the point where back pressure starts to slow the car is about 1.5 to 1 backpressure to boost ratio. Boost will keep going up, but backpressure will be picking up more per pound of boost. So if the engine is making 40psi of boost and 60psi of backpressure, something is maxed out.

[@millsmotorvation]

What fuel you running?

[@TurboJohnRacing]

methanol

[@millsmotorvation]

@@TurboJohnRacing ok, I wanted to try your timing at boost.. Lol Great information.