Brisk Multipoint spark plugs

[High on Ethanol]

Some might argue that it could be faster. Would be an interesting experiment. I've felt that, from a dig/quarter-mile perspective, with all else being equal, the AWD (although it isn't full-time AWD) might actually be faster, as it is definitely doing it's AWD thing off the line, helping to get that 60' time down. And that portion of a drag race is critical to ETs.

Think about this: it's extremely!!!!!!!! limited as far as AWD goes but if you put wide front slicks and rear skinnies.....yikes!

 

[Ecoboost_xsport]

Think about this: it's extremely!!!!!!!! limited as far as AWD goes but if you put wide front slicks and rear skinnies.....yikes!

That may work. Let's use @802SHO latest blistering 11.14 run as an example. His 60' time was 1.66. If all else was equal and he was able to remove all the AWD components and make another run as FWD only, I'm not sure he'd trap that 60' time, which would reflect in the trap speeds and ETs....but I may be wrong.

 

[High on Ethanol]

That may work. Let's use @802SHO latest blistering 11.14 run as an example. His 60' time was 1.66. If all else was equal and he was able to remove all the AWD components and make another run as FWD only, I'm not sure he'd trap that 60' time, which would reflect in the trap speeds and ETs....but I may be wrong.

What do the civics say? Skrrrrt skrrrrt skrrrrrrrrrrrrrt

 

[Ecoboost_xsport]

What do the civics say? Skrrrrt skrrrrt skrrrrrrrrrrrrrt

Haha, yeah, the ones killing it right now are the AWD conversions...

 

[High on Ethanol]

But....did they need awd for 10seconds?

https://www.motor1.com/news/129113/honda-civic-fwd-quarter-mile-record/

 

[Majestic]

But....did they need awd for 10seconds?

Yaycandy already knows of a SHO that runs 10s FWD only. Just ask him. He always has a link/proof ready.

 

[Ecoboost_xsport]

But....did they need awd for 10seconds?

No, but they are also WAY lighter...you'll never get an SHO down to the weight of a 92 Civic hatch...i think the unibody itself probably weighs more than a civic hatch, lol

 

[High on Ethanol]

No, but they are also WAY lighter...you'll never get an SHO down to the weight of a 92 Civic hatch...i think the unibody itself probably weighs more than a civic hatch, lol

But they have FWD and half the engine and H-pattern transmission.......lmao
Now THAT'S BRISK!

 

[Sharpcoolman]

Lighter weight, way less drivetrain loss

Curious what a drive shaft delete would be like

 

[High on Ethanol]

Curious what a drive shaft delete would be like

Be better off removing gears from the ptu. I would actually be surprised if someone hasnt done this already. O just don't know how to Google it

 

[Sharpcoolman]

Be better off removing gears from the ptu. I would actually be surprised if someone hasnt done this already. O just don't know how to Google it

Now that you mention it wish someone could make a gear ratio that sends much more power to rear

 

[skyshadow07]

I bought my car because it was AWD. I HATE how fwd cars behave. If you don't want the power train loss for AWD then convert your rear wheels to electric drive. A lot of the auto makers are doing this.

 

[Ecoboost_xsport]

Yeah, but I think comparing 2 different vehicle platforms is apples-to-oranges. The point I was trying to make was, if all else was 100% identical on @802SHO car except for one 1/4 mile run as it sits AWD and one where he could make it FWD, the AWD run would likely be faster, and likely because of the lower 60' times it would provide. I may be misunderstanding how our AWD systems work, but aren't they pretty much FWD anyway at a certain traction point (probably not the best description of what I'm trying to say)? They are not full-time AWD. I will admit there is likely some parasitic power loss that occurs by the spinning of the PTU and driveshaft when the RDU is disengaged in our AWD setup that a FWD setup wouldn't experience but the trade-off for the lower 60' times is worth it.

This is just all speculation on my part btw, and I could very well be incorrect. That 10sec FWD SHO @Majestic was reffering to would be an interesting case study. Is it in the 10s ONLY because of the AWD removal or is there something else going on? I'm not sure as I'd need to see his setup and compare it to @802SHO setup.

 

[Sharpcoolman]

Yeah, but I think comparing 2 different vehicle platforms is apples-to-oranges. The point I was trying to make was, if all else was 100% identical on @802SHO car except for one 1/4 mile run as it sits AWD and one where he could make it FWD, the AWD run would likely be faster, and likely because of the lower 60' times it would provide. I may be misunderstanding how our AWD systems work, but aren't they pretty much FWD anyway at a certain traction point (probably not the best description of what I'm trying to say)? They are not full-time AWD. I will admit there is likely some parasitic power loss that occurs by the spinning of the PTU and driveshaft when the RDU is disengaged in our AWD setup that a FWD setup wouldn't experience but the trade-off for the lower 60' times is worth it.

This is just all speculation on my part btw, and I could very well be incorrect. That 10sec FWD SHO @Majestic was reffering to would be an interesting case study. Is it in the 10s ONLY because of the AWD removal or is there something else going on? I'm not sure as I'd need to see his setup and compare it to @802SHO setup.

Not 100% sure but I may have read on Ecoboost forums that the awd doesn’t kick on until it reaches a certain gear or rpm range. I think even regardless if there is tire slip.

 

[skyshadow07]

So we have a weird AWD system. yes, the SHO only pushes power to the rear wheels at heavy accel and stops after a certain speed. But, the engagement clutches are attached to the rear differential. This means that even while in FWD mode, we are spinning the PTU, half shaft and the drive shaft to the rear wheels. In fact, the rear axles are still spinning. All these parts are causing parasitic losses, like giant flywheels. Only thing that stops is the pinion in the diff from the drive shaft and the crown wheel gear in the diff.

 

[Ecoboost_xsport]

So we have a weird AWD system. yes, the SHO only pushes power to the rear wheels at heavy accel and stops after a certain speed. But, the engagement clutches are attached to the rear differential. This means that even while in FWD mode, we are spinning the PTU, half shaft and the drive shaft to the rear wheels. In fact, the rear axles are still spinning. All these parts are causing parasitic losses, like giant flywheels. Only thing that stops is the pinion in the diff from the drive shaft and the crown wheel gear in the diff.

Yup, the question is, how much parasitic power loss and is it enough to be detrimental to a quick 60' time? Would the car be quicker in the 60' with or without the AWD setup? My money is on the AWD setup, but again, could be wrong.

 

[skyshadow07]

i cant imagine our massive car hooking up in the 60 with only fwd

 

[Majestic]

Yeah, but I think comparing 2 different vehicle platforms is apples-to-oranges. The point I was trying to make was, if all else was 100% identical on @802SHO car except for one 1/4 mile run as it sits AWD and one where he could make it FWD, the AWD run would likely be faster, and likely because of the lower 60' times it would provide. I may be misunderstanding how our AWD systems work, but aren't they pretty much FWD anyway at a certain traction point (probably not the best description of what I'm trying to say)? They are not full-time AWD. I will admit there is likely some parasitic power loss that occurs by the spinning of the PTU and driveshaft when the RDU is disengaged in our AWD setup that a FWD setup wouldn't experience but the trade-off for the lower 60' times is worth it.

This is just all speculation on my part btw, and I could very well be incorrect. That 10sec FWD SHO @Majestic was reffering to would be an interesting case study. Is it in the 10s ONLY because of the AWD removal or is there something else going on? I'm not sure as I'd need to see his setup and compare it to @802SHO setup.

It would be an interesting case study if it existed.

 

[High on Ethanol]

i cant imagine our massive car hooking up in the 60 with only fwd

It isn't really massive by most standards. It actually is average. I'd be surprised if the results were that different considering how limited the rear torque transfer is.

 

[Sharpcoolman]

Anybody know of any way we can electronically trigger a more frequent or constant rear wheel drive engagement? Maybe tune it so?