[Chad_W]

I’m looking to get some more power out of my m6 SS convertible. It’s my daily driver and most of the time I’m driving in the 0-60 range. What’s everyone’s recommended setup for low end power?

Also at what HP/ torque levels can you no longer keep traction on the street even with upgraded tires and wheels?

[Epx998]

Magnuson or a Whipple - you wont lose traction just cause, I am running 305 and lose traction.. when I want to, otherwise drives the same as before.

[oldman]

Any supercharger should be able to shred any normal street tire upto say 70 MPH. Just saying. The F1 is an OK tire, of PS4s, 305 Conti Contacs would be about the best you can get on "normal street tire". After that 100 wear Nitto 555Rs, even then I ran these for a while on my gen IV and my supercharged Challenger...

With no tracktion control, my M6 can't use WOT in any of the first two gears unless …. maybe just the very top of 2nd on good smooth road and slowely lay into the throttle... maybe but that is 70 to 75 mph. So first gear good to 54 MPH stock RPM, WOT is not usable. I have full mods but "only" 6.5 PSI on a 4.5" D1X. I never had a P1SC on stock engine, but still don't know if WOT in 1st can be used. People with the P1X and a 4" or 3.750" pulley have some REALLY impressive midrange numbers so I would think this setup would not hook WOT 0-60. My speculation all based on M6 with decent tires but not DRs.

My setup even WITH traction control on the car is squirrelly in the first two gears... As I go to E85, even at 6.5 PSI, I would speculate that WOT, no traction control would be a 3rd gear deal about 80 MPH, below that I will be feather the throttle. I will go to widen rims and Conti 305s on my next tire, I'm on my third set of tires in 15K miles. I'm on 275 PS4s which I like as an overall tire.

Here is a P1X dyno:
https://www.camaro6.com/forums/showt...light=p1x+dyno

You are looking at 500 ft lbs at 3750 RPM or about 31 MPH
https://www.camaro6.com/forums/showthread.php?t=409961

You are looking at 600 ft lbs at 5000 RPM or about 41 MPH

Will a PD put our more torque sooner? yep, but can it be applied to street tires. Don't think so. Once again I'm only at 6.5" PSI, will I get more traction with 305 Contis? Yep and then I will be running E85, so I'll be back to not WOT capable till the top of 2nd. Sooner or later I may need to be DR only.... I'm just to lazy to swap them due to weather etc.

[laynlo15]

Magnuson of course. Instant boost and your good to go.

[Drsagacity]

Originally Posted by laynlo15

Magnuson of course. Instant boost and your good to go.

Low end torque...You decide. Here are two cars with similar power at the peak, but with completely different torque curves. For low-end, there really is no comparison. Just depends on what you are after...I think these curves speak for themselves. In this example, the procharger was running 13 psi and the Magnuson was running 12psi.

Procharger:



Magnuson:

[Chad_W]

Thanks everyone for the responses. That Magnuson torque curve looks impressive.

With all that power how hard is it to get a fast launch on the street? Are you always struggling to keep traction or is it pretty easy to learn the limits?

[Drsagacity]

Originally Posted by Chad_W

Thanks everyone for the responses. That Magnuson torque curve looks impressive.

With all that power how hard is it to get a fast launch on the street? Are you always struggling to keep traction or is it pretty easy to learn the limits?

Yep. You can see the torque and power curves speak for themselves. That is primarily because with the Maggie, I step on the throttle and the boost goes to 12psi from start to finish. With the Procharger, you romp it and it starts at 4psi and builds it peaking at 13psi. As you can see, power under the curve isn’t even close until 6kRPM’s and beyond.

For the other question about traction, that’s gonna take some getting used to it. I would say that’s probably kind of individual based on how you drive. For me, 550whp-600whp is kind of the sweet spot for traction on street. That is also about the limit of your stock fuel system. To go further on the vert, it will take some planning (cam, fuel, LT headers, etc).

You get the Maggie, run 7psi and bam, you are gonna be in that 600whp neighborhood with nothing else. You figure with that setup you are running slightly more power than the stock ZL1 but with a very similar setup...so Street tires are manageable. With the automatic, I had a blast, manually shifting to 2nd get to about 40mph and hammer it. It would break loose a little and then it would hook and gone. Completely fun and manageable and no problem with fast starts or roll runs...(you will still need some practice to learn to drive your sled).

[Epx998]

Yes it the more power (low end torque) the more challenging the launch is. It's not a bad problem to have though

[oldman]

Originally Posted by Chad_W

Thanks everyone for the responses. That Magnuson torque curve looks impressive.

With all that power how hard is it to get a fast launch on the street? Are you always struggling to keep traction or is it pretty easy to learn the limits?

short shifting an auto with a PD, is not like a M6, you may ask jhunsberg his post are wipple below, he has by far the fastest street tire M6. IMO, even NA my car was a handful, there is no way to use WOT below 70 MPH. I would be interested to hear from m6 zl1s as the Lt4 with mods is very responsive.

[KingLT1]

Whipple or Magnuson...works better with the M6 long gearing. The Dyno graphs posted paints clear picture. Using a 6500,rpm shift point the M6 drops back to around 4700rpm in each gear. Notice how much lower the Procharger power is @ 4700rpm compared to peak. Around 200hp drop... Then look at the Magnuson...pretty flat and not nearly as much loss(50hp) on the gear change.

On a A8 it wouldn't matter as much because of the tighter shift extension especially combined with a stall converter. the engine will stay up in the power much better. So Prochargers work better on the A8's.

[Dysan911]

Originally Posted by KingLT1

Whipple or Magnuson...works better with the M6 long gearing. The Dyno graphs posted paints clear picture. Using a 6500,rpm shift point the M6 drops back to around 4700rpm in each gear. Notice how much lower the Procharger power is @ 4700rpm compared to peak. Around 200hp drop... Then look at the Magnuson...pretty flat and not nearly as much loss(50hp) on the gear change.

On a A8 it wouldn't matter as much because of the tighter shift extension especially combined with a stall converter. the engine will stay up in the power much better. So Prochargers work better on the A8's.

No Lift shifting will resolve that drop. It will hold the RPMs at 6400 and the boost will not drop much at all. Granted still not as fast as the auto shifting but wayyyyy better than just granny shifting it to where the RPM's drop to 4700.

https://www.camaro6.com/forums/showthread.php?t=513327

[KingLT1]

No lift shifting does not overcome gearing. My comment was based on hitting the shifts with no delay. The rpm is still going to drop back under 5k rpm after the gear change. if it doesn't then your clutch is slipping. No lift shift just holds the rpm at 6400 rpm while you complete the gear change and keeps the rpm from flaring.

[ShizzySupra]

Ok a couple things to ask first before everyone throws an opinion at you.

1) What are you going to be using the car for?
2) Are you comfortable running a drag radial style tire on the car often?
3) Are you comfortable putting a converter in the car and driving it often like that?

[oldman]

Originally Posted by Dysan911

No Lift shifting will resolve that drop. It will hold the RPMs at 6400 and the boost will not drop much at all. Granted still not as fast as the auto shifting but wayyyyy better than just granny shifting it to where the RPM's drop to 4700.

https://www.camaro6.com/forums/showthread.php?t=513327

With every bolt on available, no lift shifts were getting kind of tricky with the rear able to squirm maybe 2 ft, that was 3/4 lower in the back and 220 wear summer ultra performance tires.

I have not tried no lift shift with my current set up, even lifting and shifting I can NOT apply WOT in 2nd gear, it is a slow lay on the throttle to 70 MPH. I currently have 3/4 down in the back with springs, 275mm PS4s.

Once again on my setup, the throttle has to be feathered to 70 MPH, so IMO any torque above that is not usable.

The OP is on a M6 and "reasonable tires".

I would absolutely love to see a street tire, regular open road run from a PD guy and an A8 applying WOT upto 70 MPH, the OP said 60 MPH. Look I'm sure it is doable, because clearly the whipple owner in the thread below is on conti contacts and he has an M6!!!! I'm still confused on how it is done. I have maybe 1000 blast thru the first three gears looking for the optimal launch, on the 3rd set of tires... soon 4th set. My GTech is getting old and and the new one with GPS is on my Santa list. So long story short, there is at least one M6 that is able to hook plain street tires to the ground. Dunno... I'm sure the track prep is helpful but even there.

Read Fauxm's Big Red build he is still about the same speed / time with 17" drag radials over stock ZL1 tires. I admit I'm a little confused. I will have to make a tire decision before next summer, looking at least to 19" with 305s made RE71R which I have always liked. By then I'll also be on E85 and a forged engine.