Centri or pd for a 6 spd car

[NGOT8R]

@Franky16 will you be doing oil pump gears while you’re at it? Is a crank support a must with supercharged S550s?

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[NGOT8R]

I would prefer a 10,000 rpm 7.5L V-12 with 14:1 compression and keep it N/A on E85. Those are hard to come by.

Hard to come by and probably even harder to make it fit in an S550.

 

[Franky16]

Forget the blower and go turbo like real men do.

Little to fast and the furious to me

 

[robvas]

No it doesn't I agree, but there's plenty of ump for the everyday driver with a centi.

What are we defining as low end? I would say 1,500 to 4,000

There's not much boost being made on a centri at those ranges, and the power isn't much more than stock. Especially when you compare it to a PD, it's not even in the same zip code down there. Look at the ESS dyno chart before, you're only making 50 torque more than the non-boosted car. Zzzz...

Might be easier to see if you compare two graphs. Centri is far far behind and doesn't match it until about 5k

 

[robvas]

Pulleying down doesn't make much more boost "down low"

And to illustrate the nothing you gain 'down low' by pulleying down. Compare the low RPMs boost from a 12psi pulley to a 14psi pulley. Almost no difference like I said.

Also, you really can't "pulley down".

The way that boost builds on a centri, you don't hit full boost until your redline. So to make meaningful boost at say, 3,000 rpm, you would have to run such an incredibly small pulley...

Also, if you can 'pulley down' to make more boost, why didn't you already do that? You should have the smallest pulley on that you can get away with on whatever fuel you're using.

So if you're tuned for 12psi on 93, you can't go any smaller without running into knock. So it just doesn't make any sense when people say that.

 

[Franky16]

The hp and torque differences aren't that big even down at 3500 rpm. Not sure where that first dyno chart came from but it looks like a drawing lol. Yes the whipple makes more torque and power down low but its not this drastic difference your showing in your dyno graph there

 

[SolarFlare]

What's your reason? I see your running a p1x. That was the kit I was looking at

I’ve been around long enough and have raced enough to know centrifugals don’t go well with manual coyotes. Will be feel quick? Sure. But if you race an auto centrifugal you gonna find out. PD will feel good, fun around the street but also perform well because it has an easier time pulling itself up to peak power after a shift, especially in a D4 and a heavier car like a Mach1

 

[Franky16]

I’ve been around long enough and have raced enough to know centrifugals don’t go well with manual coyotes. Will be feel quick? Sure. But if you race an auto centrifugal you gonna find out. PD will feel good, fun around the street but also perform well because it has an easier time pulling itself up to peak power after a shift, especially in a D4 and a heavier car like a Mach1

True however any 10 spd boosted s550 will blow the doors off a manual s550. Manual is more fun though

 

[robvas]

The hp and torque differences aren't that big even down at 3500 rpm. Not sure where that first dyno chart came from but it looks like a drawing lol. Yes the whipple makes more torque and power down low but its not this drastic difference your showing in your dyno graph there

It's a huge difference....

You're talking 10-12 psi vs 4-5.

Not sure what's wrong with that car on the steeda graph where it's making no torque. That's not what a typical Whipple graph looks like. It's barely making 400 at 3k. Flattens out real bad too.

Edit: the graph is from a video where the vendor is trying to sell Procharger kits. Dirty.

Two more Whipple graphs...

 

[schmeky]

Franky16,

I've had a Procharger with P1X and 4.63" pulley for nearly 22,000 miles on my 2018, A10, Wengerd tuned. Aside from a toasted 10R80 it's been awesome. Engine and the Procharger have been very trouble-free.

Mine feels muscular starting at 3,500 - 4,000 and between 5,000 - 7,500 it's a white knuckle ride.

I finally dyno'ed it recently, dyno operator told me to back off at 6,800 rpm (shift points set at 7500). Made 780 to the wheel. I was running 93 with enough Boostane to give me 101-102 octane.

I have a Whipple that will be delivered on or about Dec. 2 (next week) for my 2024 GT with A10.

I'll have a much better opinion in a few weeks once I get the Whipple installed in regards to the centri vs PD thing.

Will be interesting, because I absolutely love the centri on my 2018. However, right now, I would definitely recommend a centri on an A10 car.

 

[80FoxCoupe]

What are we defining as low end? I would say 1,500 to 4,000

There's not much boost being made on a centri at those ranges, and the power isn't much more than stock. Especially when you compare it to a PD, it's not even in the same zip code down there. Look at the ESS dyno chart before, you're only making 50 torque more than the non-boosted car. Zzzz...

Might be easier to see if you compare two graphs. Centri is far far behind and doesn't match it until about 5k

In a drag race, none of that low end tq matters. PD vs centri at similar power numbers they will run similar times. What advantage does PD really have? More tq when lugging it around in low rpm range? Nobody does that. They definitely feel different when driving but that's really it. I don't think one is better than the other, it's just comes down to what you like.

 

[Franky16]

Franky16,

I've had a Procharger with P1X and 4.63" pulley for nearly 22,000 miles on my 2018, A10, Wengerd tuned. Aside from a toasted 10R80 it's been awesome. Engine and the Procharger have been very trouble-free.

Mine feels muscular starting at 3,500 - 4,000 and between 5,000 - 7,500 it's a white knuckle ride.

I finally dyno'ed it recently, dyno operator told me to back off at 6,800 rpm (shift points set at 7500). Made 780 to the wheel. I was running 93 with enough Boostane to give me 101-102 octane.

I have a Whipple that will be delivered on or about Dec. 2 (next week) for my 2024 GT with A10.

I'll have a much better opinion in a few weeks once I get the Whipple installed in regards to the centri vs PD thing.

Will be interesting, because I absolutely love the centri on my 2018. However, right now, I would definitely recommend a centri on an A10 car.

Awesome man

 

[robvas]

In a drag race, none of that low end tq matters. PD vs centri at similar power numbers they will run similar times. What advantage does PD really have? More tq when lugging it around in low rpm range? Nobody does that. They definitely feel different when driving but that's really it. I don't think one is better than the other, it's just comes down to what you like.

He asked which is preferred to drive on the street and why.

 

[Franky16]

It's a huge difference....

You're talking 10-12 psi vs 4-5.

Not sure what's wrong with that car on the steeda graph where it's making no torque. That's not what a typical Whipple graph looks like. It's barely making 400 at 3k. Flattens out real bad too.

Edit: the graph is from a video where the vendor is trying to sell Procharger kits. Dirty.

Two more Whipple graphs...

Steeda has no dog in that battle. They sell and promote both

 

[Franky16]

So stage 2 whipple or stage 3 vmp? Looks like you get the round t body from the 650 kit, pump booster and possibly a more aggressive tune

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