Disappointed in the 9 Liter

[Jack B]

Jack, are you measuring tire/wheel spin with the drive shaft rpm logger or something else ? Also, thanks for all the info you provide this forum.

In some cases it is hard to discern clutch slippage from wheel spin, both the oem and popular aftermarket clutches will slip with sticky tires. The shaft sensor will differentiate whether the slippage is clutch or wheel related.

As a side noire the twin and triple clutches solve most shifting issues, however, they can bring other issues. The floaters warp and strapped designs can have eng braking limitations.

I just installed the Nth Moto so I have limited exprience. However, their design does address the warping and glazing problems. In addition, the rotating shaft mass is less than 1/2 the weight of other designs. Here is interesting point, the Nth flywheel is actually steel even though the overall weight is 14 lbs lighter than oem . This helps start the forward motion of the car, therefore, less stumble

[01sapphirebob]

Where did you get this info?

Thanks!

Dick Winkles had mentioned it to me at our party last month.

[Arizona Vipers]

the 9 Liter package feels like it adds the torque of a 150 shot of nitrous. The increase is 50 hp, but, The torque increase is approx 100 ft lbs at some points under the curve.

How does adding 5% more displacement add 17% more torque? (512ci vs 541ci)
And how does adding 29 cubes increase torque by 100 ft/lbs?

[socal]

How does adding 5% more displacement add 17% more torque? (512ci vs 541ci)
And how does adding 29 cubes increase torque by 100 ft/lbs?

More leverage on the crank due to the larger stroke.

[Arizona Vipers]

More leverage on the crank due to the larger stroke.

So why doesn't every engine builder do this and add 5% more displacement to get 17% more torque?
Has anyone done a before and after dyno yet? No way does adding 29 cubes increase the dyno numbers by 100 ft/lbs.
We've seen many arrow stage 2 dynos at over 620 ft/lbs at the wheels. Are we saying the 9.0's are doing over 720 ft/lbs at the wheels? lol

[Jack B]

How does adding 5% more displacement add 17% more torque? (512ci vs 541ci)
And how does adding 29 cubes increase torque by 100 ft/lbs?

The eng dyno plot they supply is generated from input that receives data every 10 rpm. I have not done a detailed comparison to a stock G5, but, it cannot be near 575 ft lbs at 3000 rpm. Do the homework, post the stock curve.

The G5 was not a typical viper all-torque motor like the G1, G2 and G3. The Stage 2 has peak torque at close to 5200-5300 rpm, which means you only have approx 16% of the rpm band left. The 9L is like a G2 on steroids all the way from 1000 rpm up.

[socal]

So why doesn't every engine builder do this and add 5% more displacement to get 17% more torque?
Has anyone done a before and after dyno yet? No way does adding 29 cubes increase the dyno numbers by 100 ft/lbs.
We've seen many arrow stage 2 dynos at over 620 ft/lbs at the wheels. Are we saying the 9.0's are doing over 720 ft/lbs at the wheels? lol

Why doesn't every engine builder improve the casting of heads to match what ported heads flow? There is always better, and for a manufacturer "better" can be the enemy of "good enough". It's just a matter of how much and the diminishing returns this effort provides.

[Scot@Prefix]

Where did you get this info?

Thanks!

The big bore block was no longer pursued, there is not enough coolant jacket around the cylinder liners after installing the larger diameter liners.
The block would have to be redesigned to accommodate a larger coolant passage around the cylinder liners.

[Scot@Prefix]

So why doesn't every engine builder do this and add 5% more displacement to get 17% more torque?
Has anyone done a before and after dyno yet? No way does adding 29 cubes increase the dyno numbers by 100 ft/lbs.
We've seen many arrow stage 2 dynos at over 620 ft/lbs at the wheels. Are we saying the 9.0's are doing over 720 ft/lbs at the wheels? lol

Typical results are about 698 ft/lbs with the 9L xtreme at the rear wheels.

[stradman]

Typical results are about 698 ft/lbs with the 9L xtreme at the rear wheels.

Lets not split hairs Scot...Lets call it an even 700 ft/lbs and we're square...

[hans christian]

Scot,
No pressure - I am fully expecting mine to be higher than average

[Arizona Vipers]

Typical results are about 698 ft/lbs with the 9L xtreme at the rear wheels.

Haha, now I know this!

[Anton28]

Wasnt there a 740/750 rwhp number floating around?

[stradman]

Wasnt there a 740/750 rwhp number floating around?

Thats Hp, not torque.