GEN III , GEN II Engines

[Inferno]

Can someone please explain the difference between the 2 engines. Are they both 8l v10's? What is done with the srt10 engine to get the extra power and tourque? Is it just a different bore? Finally, with the extra power, why are the srt10's are not seeing 1/4m times much,(or even as good as), better than the gts?

 

[Silver Snake]

Gen 2 = 4.00" bore and 3.88" stroke = 8.0L
Gen 3 = 4.03" bore and 3.96" stroke = 8.3L

Gen 2 = 450HP/490TQ
Gen 3 = 500HP/525TQ

Not sure about the 1/4 mile times.

 

[Ron]

GENIII's have better flowing heads vs. GEN II

 

[Chuck 98 RT/10]

Single inlet intake.

1/4 times are .1 to .2 faster than GenII. If a bone SRT and bone GTS are at the same track on the same day with comparable drivers, the SRT will win.

 

[Inferno]

Thanks for the info, .1/.2s doesn't seem like much for 50hp/35lbs, any thoughts?

 

[Russ M]

When you get to cars making this kind of power traction is the limiting factor.

 

[DEVILDOG]

Thanks for the info, .1/.2s doesn't seem like much for 50hp/35lbs, any thoughts?

The GTS has a lower cd and usually lighter drivers.

 

[GR8_ASP]

The Gen III is much harder to drive. First the tires are harder to hook up, especially given that they are a larger diameter resulting in a taler overall gear ratio.

Second, and this may be more significant, the SRT hp peak is higher and the fuel shut-off speed is lower. That makes it much more difficult to use the power band to its fullest. Bump the rev limiter up a bit and watch out.

The drag coefficient has almost no impact in the 1/4 mile for cars in this power range. The SRT os lower than the RT/10 for instance. But between the GTS and RT/10 which is faster in the 1/4? Not much difference is there.

 

[Viper Specialty]

The Gen III is much harder to drive. First the tires are harder to hook up, especially given that they are a larger diameter resulting in a taler overall gear ratio.

Correction: The SRT-10's tires hook up BETTER than Gen-2, as a Taller tire=Taller gearing=Less Torque application per given distance of the diameter.
An SRT with stock tires and a 3.07 rear end would be the equivalent of a stock tire sized Gen-2 with a 2.93 rear end. In short, it is more difficult to spin the SRT tires from a roll.


Now, what does that mean? It means that after rolling, the tires will hook better, and reach a higher MPH in the same gear. On the opposite end of the scale, it means that the car will be that much more difficult to launch without a bog/spin situation, and that much harder on its clutch/gearsets/halfshafts.

 

[VIPER D]

The Gen III is much harder to drive. First the tires are harder to hook up, especially given that they are a larger diameter resulting in a taler overall gear ratio.

Second, and this may be more significant, the SRT hp peak is higher and the fuel shut-off speed is lower. That makes it much more difficult to use the power band to its fullest. Bump the rev limiter up a bit and watch out.

The drag coefficient has almost no impact in the 1/4 mile for cars in this power range. The SRT os lower than the RT/10 for instance. But between the GTS and RT/10 which is faster in the 1/4? Not much difference is there.

Ron they have a saying a bad ballerina blames her tights. That statement is absolutely not true, in fact the srt is much easier to drive as stated by dan. I always hated the dual throttle bodies that could never be driven real slow b/c of a bad design. Or the inadequite brakes for that power level. And lack of abs brakes.

vd..

 

[1TONY1]

Correction: The SRT-10's tires hook up BETTER than Gen-2,

I disagree. The runflats ****. Even from a first gear roll the SRT spins where a gen2 would not. I don't believe it's the extra power either.

 

[Viper Specialty]

Correction: The SRT-10's tires hook up BETTER than Gen-2,

I disagree. The runflats ****. Even from a first gear roll the SRT spins where a gen2 would not. I don't believe it's the extra power either.

In cold weather, yes, they do ****, HORRIBLY. However, SRT-10 tires reach a threshold in warm weather of not being able to spin them from a roll faster than a Gen-2 does. On a sunny 80+ degree day, an SRT-10 with warm tires cannot spin them from a roll without clutching it. The same follows for a GTS, but they need 90+ degrees and sunny on average to reach that point. (obviosly its the road temp, not ambient...though I havent measured it and that is the exterior conditons at the time)

Also, regaurdless of opinions on tires, everything I stated still stands if the cars went tire for tire with no other changes.

 

[GR8_ASP]

Well then it is just me. I consistently get better 60 ft times with a gen I. Both on stock tires. The higher effective gear ratio (lower numerically) means that once spinning they spin faster. So more torque to start them spinning but a higher spinning speed once they start (thus harder to modulate), and damnable wheel hop if they spin too fast.

The other aspect, which I said was the most important to me, is the proximity of peak power to fuel shut-off. The Gen II gets no where close to fuel shut-off as the preferred shift speed is way down in the 5600-5800 rpm range. The Gen III wants to be shifted at or near 6000 rpm. But the fuel shut-off is only 6050 rpm (vs 6250 for the Gen I/II). Darn close. I record my engine parameters when I drag it and I was hitting the limiter more than 50% of the time. That is why I said bumping the fuel shut-off rpm upward would help.

The other aspect is people who drive the Gen III with similar shift points to the gen II will naturally trap lower as they are not reaching the hp peak.

Just my thoughts but I do have 40k miles experience in a gen I and 10k in a Gen III so my experience is not without some basis.

 

[orlandov10]

so whats the difference between the motors? Is it basically the same engine just bored over to 500 cubes?