smooth lower end torque

1K9 said:

Wow, this is a nice thread. I have some specific needs for the low end low velocity portion of the throttle twist.

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A TPS vs RPM analysis is easy to do. Even in your head. If you want graphs then get a cheap ELM27 type plug for the OBD connector and log the data to a cellphone. Logging AFR requires more specific equipment.

If I'm in top at under 2000rpm then I don't expect instant response. And would probably drop to 4th unless the transition upwards again was likely to be gradual. Like Fred - I try not to lug the engine.

1st for me is a crawler gear - I live on a rural estate with really ****ty roads - speed bumps etc. 5th is tuned as a distance and economy (ish) gear.

For interest and delectation - here is a graph of a recent run. A mix of rural roads. About 45minutes worth. The log file ran out as I hit motorway.
If I remember to hit the button today I will have a "mostly motorway" run I can share.

As stated by 1K9, this is an interesting thread and part of what makes this forum exceptional.

Rocket3Pilot said:

I got a noticeable increase in lower rpm torque when I installed Paul Bryant's header on my stock 2013 R3R with RamAir and de-catted stock mufflers. Still haven't found a dyno in my vicinity to verify numbers, but I love the low end grunt. I can plod along in any gear at 2000rpm and accelerate smoothly without downshifting. If I really want to snap out of it though, I can always downshift.

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Good to hear, im waiting on my paul byrant header. Cant wait!!!

Rocket3Pilot said:

I got a noticeable increase in lower rpm torque when I installed Paul Bryant's header on my stock 2013 R3R with RamAir and de-catted stock mufflers. Still haven't found a dyno in my vicinity to verify numbers, but I love the low end grunt. I can plod along in any gear at 2000rpm and accelerate smoothly without downshifting. If I really want to snap out of it though, I can always downshift.

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Same. I have the complete system

barbagris said:

If I remember to hit the button today I will have a "mostly motorway" run I can share.

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Guess what I forgot!.