[Saberscar223]

Ive settled on getting a Procharger and I've narrowed it down to these 2 but Im not seeing much comparisons between them. What are some of the pros and cons of either?

[WiggyB]

Originally Posted by Saberscar223

Ive settled on getting a Procharger and I've narrowed it down to these 2 but Im not seeing much comparisons between them. What are some of the pros and cons of either?

According to the guys at procharger the D1SC is the sweet spot for stock LT1 cars. It will build boost faster than a P1X and you get good mid range torque too. I was trying to upgrade to a P1X from a P1SC1 but they convinced me to go D1SC and I have no regrets.

[18.2SS.1LE]

Originally Posted by WiggyB

According to the guys at procharger the D1SC is the sweet spot for LT1 cars. It will build boost a faster than a P1X and you get good mid range torque too. I was trying to upgrade to a P1X from a P1SC1 but they convinced me to go D1SC and I have no regrets.

This is the first I've heard of the D1SC building boost faster than a P1X. Have you confirmed with your logs?

[Saberscar223]

Originally Posted by 18.2SS.1LE

This is the first I've heard of the D1SC building boost faster than a P1X. Have you confirmed with your logs?

The way I’ve heard it is P1X pulls more up top and the D1SC pulls more down low-mid range

[WiggyB]

I don't have any logs to show but just speaking towards what the rep at procharger mentioned to me. Now I was thinking that going to the p1x I could use the same setup and boost but make a little more power with cooler temps. The P1X was designed for vehicles with higher revving limits (newer Mustangs) where the D1SC builds down low just as Saberscar223 mentioned. He just said I would get better results with the d1sc for my vehicle staying under 7krpm with the sweet spot being between 63-6700rpm and possibly make more boost in that range. I was making 10psi at 6800 with a 3.4 pulley on the p1sc1 and now averaging between 12 to 13psi at 6700rpm with the d1sc after swapping to a 3.85 pulley. With that same 3.4 pulley it made 13psi at 6100rpm. I can capture some screenshots from logs if you would like but everything that was mentioned to me was dead on.

[Hammer-joe]

I ran a P1X for 3 years and switch to a D1X 2 years ago with no regrets.

[18.2SS.1LE]

Originally Posted by WiggyB

I don't have any logs to show but just speaking towards what the rep at procharger mentioned to me. Now I was thinking that going to the p1x I could use the same setup and boost but make a little more power with cooler temps. The P1X was designed for vehicles with higher revving limits (newer Mustangs) where the D1SC builds down low just as Saberscar223 mentioned. He just said I would get better results with the d1sc for my vehicle staying under 7krpm with the sweet spot being between 63-6700rpm and possibly make more boost in that range. I was making 10psi at 6800 with a 3.4 pulley on the p1sc1 and now averaging between 12 to 13psi at 6700rpm with the d1sc after swapping to a 3.85 pulley. With that same 3.4 pulley it made 13psi at 6100rpm. I can capture some screenshots from logs if you would like but everything that was mentioned to me was dead on.

Interesting! Do you notice the D1SC making additional heat with higher IAT's? I'm shifting around 7,200 and making 12 psi with a 3.7 pulley.

[GreyGhost702]

Originally Posted by WiggyB

I don't have any logs to show but just speaking towards what the rep at procharger mentioned to me. Now I was thinking that going to the p1x I could use the same setup and boost but make a little more power with cooler temps. The P1X was designed for vehicles with higher revving limits (newer Mustangs) where the D1SC builds down low just as Saberscar223 mentioned. He just said I would get better results with the d1sc for my vehicle staying under 7krpm with the sweet spot being between 63-6700rpm and possibly make more boost in that range. I was making 10psi at 6800 with a 3.4 pulley on the p1sc1 and now averaging between 12 to 13psi at 6700rpm with the d1sc after swapping to a 3.85 pulley. With that same 3.4 pulley it made 13psi at 6100rpm. I can capture some screenshots from logs if you would like but everything that was mentioned to me was dead on.

This chart is from LS1 Tech, a gentleman was kind enough to plot the differences between his D1SC spinning to 62,000 vs D1X spinning to 62,000. The D1SC does come on sooner than the D1X, but the D1X makes boost more efficiently beyond 5,500.

Having owned both blowers myself on different applications, I can honestly say I feel the D1X is the better bang for the buck

I picked up my D1X as a 2nd hand (really 3rd or 4th hand) deal for this application. If it wasn't for the fact that it's strapped to a fairly large displacement engine, I would have traded it away for a D1SC months ago. The D1X is absolutely brutal from a roll. And I like it a lot I do miss the D1SC in terms of low-mid curve grunt. Obviously not as punchy as a PD blower, but you knew it was there. We often cite "what rpm are you going to spend more of your time" but the real question is, what kind of power are you looking for when you get there? At WOT, I promise everyone spend more time between 5,500-7,000rpm than they do at 2500-4500. If you spend more time at 2500-4500 at WOT than any higher RPM, then you're buying the wrong type of power adder, you want to look at a PD blower.

That said, yes the X is the peakier blower, but you do not need to rev to 7,000+ to make use of it. With proper pulley combos, you can run a centri efficiently at any RPM. If you have to spin the blower beyond it's max rating, you should just move up to the next head unit if you want more power. If you roll over to LS1 Tech and read that whole post, guy is only reving to 6700 engine speed to hit 62,000RPM on the D1X. At that point, you're going to be fighting an IAT battle. Beyond that, you're exceeding ATI's efficiency rating for the head unit. Not to say that you can't take it beyond that, but the further you go the more you're just french kissing an angry dragon.

What you can't get in a D1SC is the efficiency of design. The D1SC is going to run hotter and never touch a D1X. Apples to Apples, a D1X is the better head unit. IMO, unless you're application is a truck, I think the X is the way to go. I know OP is talking about a P1X vs D1SC, but even the P1X is still the superior design and will take you to max power more efficiently. And again, how high the engine is capable of reving isn't near as important as how much air the engine can efficiently move. The X series wasn't designed for high rpm applications, it was designed to operate more efficiently at high rpm. As in, the head unit itself at high RPM. You can pulley a head unit so it maxes out long before the engine hits its peak, but then you're overspinning the blower.

To the OP: +1 for the P1X (though I really think you should consider the D1X if you're considering a D1SC at all).

[WiggyB]

Originally Posted by 18.2SS.1LE

Interesting! Do you notice the D1SC making additional heat with higher IAT's? I'm shifting around 7,200 and making 12 psi with a 3.7 pulley.

Here's a comparison I screenshot of the d1sc vs p1sc1. Its not a p1x because like GreyGhost702 said the higher the RPM the more the p1x will make. My p1sc1 was on a 3.4 upper while the d1sc is on a 3.85. I could be wrong but from my understanding the procharger rep said the p1x would have made the same amount of boost if I did go to it so I did get that gain going to d1sc.

[18.2SS.1LE]

Originally Posted by WiggyB

Here's a comparison I screenshot of the d1sc vs p1sc1. Its not a p1x because like GreyGhost702 said the higher the RPM the more the p1x will make. My p1sc1 was on a 3.4 upper while the d1sc is on a 3.85. I could be wrong but from my understanding the procharger rep said the p1x would have made the same amount of boost if I did go to it so I did get that gain going to d1sc.

I see, definitely hard to compare with the different pulley combos but you'll have plenty more room to grow with the new unit. Why are you only at 5 degrees of timing on the new one though?

[WiggyB]

Originally Posted by 18.2SS.1LE

I see, definitely hard to compare with the different pulley combos but you'll have plenty more room to grow with the new unit. Why are you only at 5 degrees of timing on the new one though?

I believe that was the point I was beginning to let off throttle. I should have backed it up a second or 2 and the timing would have been the same on both.

[KingLT1]

Originally Posted by GreyGhost702

This chart is from LS1 Tech, a gentleman was kind enough to plot the differences between his D1SC spinning to 62,000 vs D1X spinning to 62,000. The D1SC does come on sooner than the D1X, but the D1X makes boost more efficiently beyond 5,500.

Having owned both blowers myself on different applications, I can honestly say I feel the D1X is the better bang for the buck

I picked up my D1X as a 2nd hand (really 3rd or 4th hand) deal for this application. If it wasn't for the fact that it's strapped to a fairly large displacement engine, I would have traded it away for a D1SC months ago. The D1X is absolutely brutal from a roll. And I like it a lot I do miss the D1SC in terms of low-mid curve grunt. Obviously not as punchy as a PD blower, but you knew it was there. We often cite "what rpm are you going to spend more of your time" but the real question is, what kind of power are you looking for when you get there? At WOT, I promise everyone spend more time between 5,500-7,000rpm than they do at 2500-4500. If you spend more time at 2500-4500 at WOT than any higher RPM, then you're buying the wrong type of power adder, you want to look at a PD blower.

That said, yes the X is the peakier blower, but you do not need to rev to 7,000+ to make use of it. With proper pulley combos, you can run a centri efficiently at any RPM. If you have to spin the blower beyond it's max rating, you should just move up to the next head unit if you want more power. If you roll over to LS1 Tech and read that whole post, guy is only reving to 6700 engine speed to hit 62,000RPM on the D1X. At that point, you're going to be fighting an IAT battle. Beyond that, you're exceeding ATI's efficiency rating for the head unit. Not to say that you can't take it beyond that, but the further you go the more you're just french kissing an angry dragon.

What you can't get in a D1SC is the efficiency of design. The D1SC is going to run hotter and never touch a D1X. Apples to Apples, a D1X is the better head unit. IMO, unless you're application is a truck, I think the X is the way to go. I know OP is talking about a P1X vs D1SC, but even the P1X is still the superior design and will take you to max power more efficiently. And again, how high the engine is capable of reving isn't near as important as how much air the engine can efficiently move. The X series wasn't designed for high rpm applications, it was designed to operate more efficiently at high rpm. As in, the head unit itself at high RPM. You can pulley a head unit so it maxes out long before the engine hits its peak, but then you're overspinning the blower.

To the OP: +1 for the P1X (though I really think you should consider the D1X if you're considering a D1SC at all).

That graph doesn't really apply here because it is showing the capabilities of the D1x when pullied for 20psi. The car in discussion here is a stock bottom end. It won't make it 2 pulls on 20 psi of boost. Pulley that D1x for 10psi peak and you will see the D1sc has a much flatter boost curve and would be all around a faster car.

The D1x is way too much blower for a stock bottom end car.

It's no different comparing the Maggie 2300 to 2650. Pulley both for 10psi and the 2300 makes more power under the curve. Pulley both for 15psi and the 2650 pulls away no contest.

Different size blowers exist for a reason. Anything under 850whp I would stick with a D1sc or P1x. They both are fairly close in capabilities, so it's kind of splitting hairs. Manual car I would probably opt for D1sc for the little bit more low end boost that it makes. Auto it doesn't matter as much.

[Joshinator99]

Originally Posted by KingLT1

That graph doesn't really apply here because it is showing the capabilities of the D1x when pullied for 20psi. The car in discussion here is a stock bottom end. It won't make it 2 pulls on 20 psi of boost. Pulley that D1x for 10psi peak and you will see the D1sc has a much flatter boost curve and would be all around a faster car.

The D1x is way too much blower for a stock bottom end car.

It's no different comparing the Maggie 2300 to 2650. Pulley both for 10psi and the 2300 makes more power under the curve. Pulley both for 15psi and the 2650 pulls away no contest.

Different size blowers exist for a reason. Anything under 850whp I would stick with a D1sc or P1x. They both are fairly close in capabilities, so it's kind of splitting hairs. Manual car I would probably opt for D1sc for the little bit more low end boost that it makes. Auto it doesn't matter as much.

Agree 100%

I always thought the advice from the late, great, John Lingenfelter was always sage: “Build torque in the RPM band at which the car will spend most of its time”. Since torque is simply airflow plus timing, it’s not hard to get where you want to go.

[WiggyB]

Manual car I would probably opt for D1sc for the little bit more low end boost that it makes. Auto it doesn't matter as much.[/QUOTE]

This is a good point KingLT1 as it was also something the PC rep pointed out with me having an M6.