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Old 05-25-2017, 04:41 PM   #31
Siegfried Paul
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

what i'd like to know is how a turbo system would handle nitro injection. is nitro a better fit for a blower system or could a turbo also be a good fit?

can any of the experts give an estimation? really curious...
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Old 05-30-2017, 05:55 PM   #32
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

considering they leave at an idle, nitro won't take well to a two step style rev limiter. I don't think you could get enough of whatever the latest efi injectors to handle the volume of fuel, so you are looking at mfi.

that would be the biggest challenge in my opinion - getting the turbo to spool and getting the car moving off the line. Figuring out a fuel system to make those two things happen would be an undertaking. as mentioned it would be pretty expensive learning curve because nitro is not forgiving.
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Old 05-30-2017, 06:34 PM   #33
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

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Originally Posted by TAFC425 View Post
considering they leave at an idle, nitro won't take well to a two step style rev limiter. I don't think you could get enough of whatever the latest efi injectors to handle the volume of fuel, so you are looking at mfi.

that would be the biggest challenge in my opinion - getting the turbo to spool and getting the car moving off the line. Figuring out a fuel system to make those two things happen would be an undertaking. as mentioned it would be pretty expensive learning curve because nitro is not forgiving.
It would make a nice BOOM tho......
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Old 05-30-2017, 07:24 PM   #34
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

Could you stage the car on alcohol and have a separate fuel system with 50% activated when transbrake is released.
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Old 05-30-2017, 07:54 PM   #35
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

I don't think horsepower is the problem with turbo cars in PX, no need for nitro.
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Old 05-31-2017, 06:15 AM   #36
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

Problems and Turbo cars in PX, ding ding ding, What are 2 words you hear from Turbo racers Alex.

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I don't think horsepower is the problem with turbo cars in PX, no need for nitro.
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Old 05-31-2017, 07:06 AM   #37
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

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Here's the article on how they estimated Schumacher's hp. (11,051)

http://www.hotrod.com/articles/don-s...torque-sensor/
Here's another article with more info and pics of the sensor.

http://www.enginelabs.com/news/top-f...er-8000-lb-ft/







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Old 06-01-2017, 04:19 PM   #38
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

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Originally Posted by TAFC425 View Post
considering they leave at an idle, nitro won't take well to a two step style rev limiter. I don't think you could get enough of whatever the latest efi injectors to handle the volume of fuel, so you are looking at mfi.

that would be the biggest challenge in my opinion - getting the turbo to spool and getting the car moving off the line. Figuring out a fuel system to make those two things happen would be an undertaking. as mentioned it would be pretty expensive learning curve because nitro is not forgiving.
Thanks for the info, interesting, hadn't thought of this sort of injector problems.

so, with nitro you need to go with mfi in general or only in case of a turbo application?
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Old 06-01-2017, 04:29 PM   #39
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

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I don't think horsepower is the problem with turbo cars in PX, no need for nitro.
For sure @Joe_K, my question aimed at nitro handling of turbo applications in general...

I'd also like to know where the limits are technically, for example would it be possible to run a TF with a turbo / successfully?
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Old 06-01-2017, 05:05 PM   #40
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

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For sure @Joe_K, my question aimed at nitro handling of turbo applications in general...

I'd also like to know where the limits are technically, for example would it be possible to run a TF with a turbo / successfully?
I'd love to see it, but the rules prohibit it.
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Old 06-02-2017, 10:53 PM   #41
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

Very interesting thread gang. Pretty salty input with a lot of knowledge. Kudos!

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Old 06-03-2017, 02:15 AM   #42
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

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For sure @Joe_K, my question aimed at nitro handling of turbo applications in general...

I'd also like to know where the limits are technically, for example would it be possible to run a TF with a turbo / successfully?
It's been tried at least once in the past, maybe 30 or so years ago. Not enough power at the hit to competitively launch the car, then way too much after the turbos spooled up. And Mickey Thompson once campaigned a Mustang funny car that instead of a supercharger, used compressed air. It was a complex piece that produced ungodly power for the time, but they never got it sorted out.
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Old 06-03-2017, 09:03 AM   #43
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

This was built back in the early 2000s, but I don't think it ever really went anywhere. Nitro burning, nitrous assisted twin turbo 4cyl funny car.

http://www.superstreetonline.com/how...nycar-integra/
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Old 06-03-2017, 04:16 PM   #44
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

Thanks @The RevII and @VegaEddie, this article http://www.superstreetonline.com/how...nycar-integra/ was a super interesting read and it sounds like it is a solvable challenge maybe as long as you go with a dual fuel concept (Ethanol, nitrous for staging/ spooling and switching to nitro at launch).
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Old 06-06-2017, 08:39 AM   #45
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Default Re: PDRA to allow 50% Nitro, Injected Nitro PM's

ANYTIME a sanctioning body tries to introduce different engine combinations into one class it ends up being a cluster fuck!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!
Thats why they separate classes for the blown and nitrous cars in most sanctioning bodies. NHRA is trying to keep Turbo, Nitrous and blown cars even.
GOOD FUCKING LUCK YOU MORONS! No matter how hard they try, people will gain an advantage with one combo or another.

An EVEN playing field and TRUE competition is racing against people who have the same combination you do.

Just my opinion after 35 years doing this and seeing what happens when they try it.
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