reactor2

I know this depends on mucho variables but with heads, cam, intake, exhaust, and provided I can spin the P1SC to its max (belt slippage) what kind of psi is possible? 10-12, 12-14?

Right now my boost gauge tells me 6.5-7 on a 4.25" pulley at 6000rpm.

a/c man

When I had a p1sc my max was 12 psi with a overdrive balancer and 3.4 pulley. But it was on a 402 with ported heads, headers stock intake. I went to a d1 and with the same setup could only hit 14 psi. Now I'm running a Ysi and can hit 20 psi easy.
Hope this helps

PEETYZ

OP I'm currently at 9-10 psi with 3.8 pulley and stock crank pulley with listed mods in sig on my P1SC-1.

Recently purchased twin nozzle Alky kit and 3.4 blower pulley. Plan to do the OD pulley as well.

I assume I will gain about 4-6psi going from 3.85 with 7.5 stock crank to a 3.4 with 8.10 crank with meth? 15psi total maybe? Hopefully she cracks 700rwhp at that point with more boost and meth.

I really want it to get into boost faster. Friend has a 2011 GS with V2 and 3.25 pulley ( stock crank balancer) and its in boost quick.

This pulley combo will max the impeller speed of the P1SC-1 out at 6,700 engine rpms.

Blow Torch

I have seen 13 on my P1SC1 on a 98* day, but was having trans issues so I couldn't really turn it to 6600 (my shifting rpm)
Im running a 3.1 pulley and standard balancer with flip drive.
With all the tuning issues worked out, on a 60* day, Im hoping for a little more.

reactor2

Nice.

Next question, I'm running the procharger bracket. How much boost can I see with the procharger bracket?

95wht6spd

Whatever it hits when it starts slipping. How old is bracket?
If you are going to max out, I would get an AA or ECS bracket, some type of flip drive, 8 rib.

95wht6spd

Peetyz...sounds cool. I look forward to seeing results, should be really responsive at that level. When are you starting?

idontknow

no need for an 8 rib, 6 rib will be just fine

PEETYZ

Thanks man. I'm gonna tear it down this winter likely won't have results until march ish

I had zero slip with 3.8 pulley on stock balancer with my A&A V2 bracket once I got correct belt on. I assume I would have similar belt wrap with OD balancer and a 3.4-3.6 blower pulley. If I got a deal on a D1 or F1a etc I'd take it but I think the lil P1 will get me to my 700rwhp goal on meth. If I have to do flip or secondary drive so be it.

There's been a few who have made over 700 on P1 with 6 rib.

In my opinion 700+ will likely demand:
Larger blower
larger fuel system
bigger clutch
8 rib/flip or secondary drive etc
Forged bottom end (piece of mind/longevity)

ID like to see similar results with mine completely maxed out to Neutron82 02 Z06, 722/588, 346ci d1sc @ 12psi with meth (Stock bottom)


Neutron,

What was your motor set up and the pulley sizes on blower and crank here Sir?

I know I will likely need more than 12psi on my P1SC-1 to crack 700.

neutron82

stock heads and block, cam, longtubes, dual nozzle meth, stock balancer, and a 4.38 pulley but that was on a d1sc not a p1sc... I am working on a new setup with an overdrive 10 rib balancer, secondary drive, and new fuel system so I should pick up a couple psi and maybe creep in on 800ish but I'm going to do my best to try and not touch that motor anymore after this... doesn't make much sense to me to push it much harder than that and I'm not trying to break any records or max out my blower or anything

PEETYZ

Thank you.

You werent pushing the D1 very hard at 6,700 RPM your D1 impeller speed was only 47,038 out of max rated 62,000.

This gives me more hope the lil P1SC-1 can do it if its pushed hard enough. ( I know a D1 would be better across the board )

Sounds like you got a killer set up planned

neutron82

yeah I really didn't think I would make 12psi on that donut sized pulley with my mods, I was pretty suprised... and like you pointed out it isn't being spun very hard at all, I did toss around the idea of going with a smaller pulley to get it into boost quicker and use a restrictor plate... I was hoping to have the car done by the end of the year but as slow as things have progressed I don't think that's going to happen, hopefully I will have it done by the time the weather gets really nice in late feb early march

idontknow

my set up is really close to what you are going for. i have an 8 rib OD balancer and only running a 6 rib on the D1 and making 16psi. made 758 and was slipping the clutch for the last 1500 rpms. which is why my dyno graph got funky at then end of the pull. i have a innovative west OD balancer and a 4.1 pulley. going to send the clutch off to get rebuilt and doing a couple of other mods and she should be at 800

2bridges

providing basic info on your setup would certainly help others with similar setup share their experience.

I will venture a guess based on the current pulley size and observed boost that you are a stock LS1 or LS6

my experience with a low mileage(<30K) Z06 LS6 with headers & catless full exhaust
3.70 pulley ATI verson2 bracket, stock damper
single nozzle progressive meth injection starting at 4psi

@ 6,400rpm - 9.4pi boost => 550 rwhp mustang dyno / 635 dynojet
IATs at or below ambient for every dyno run (even with dyno shop > 100 degrees)

calculated impeller speed is 53,189 (below manufacturer max of 65,000)


@ 7,000rpm (58,176 impeller) at or just over 11psi is observed.
I can only speculate on IATs and rwhp as I have no logging or dyno to refer to at 7K

reactor2

Here's what I've got:
'98 LS1
Dart Pro 1 205 heads (10.9:1 comp)
228/232 .571/.573 112
BBK shorty headers
Yella Terra roller rockers
Fast intake manifold
LS2 TB
60#, LPE pump
3.42 rearend
Yank SS3600
A&A w/ procharger bracket

I didn't expect to see 6-7psi at 6000 rpm with a 4.25" pulley, but that is what my autometer gauge tells me.

idontknow

03 z06
d1@16psi
e85
flip drive
Ragin racing twin pump set up
1:1 regulator
long tubes
over drive balancer
SLIPPING clutch

neutron82

are you still on stock block/heads/cam?

idontknow

Stock block
Stock heads (head studs)
It does have arun's stage 3 cam. Don't know how i forgot that

Makes 758/640 with the clutch slipping at 5500 rpms. We are guessing it will be around 800 when the new clutch gets put in.

2bridges

assuming gauge reading is accurate I am surprised there is so much restriction in your setup. What IC setup does it have? What does dyno say? boost? whp? AITs?

reactor2

It has the big A&A single intercooler. Air intake temps seem normal and, of course, depend on the ambient temp.

Its all A&A, minus the bracket, which is procharger.

I haven't been to the dyno.

What PSI would you expect for my setup?

I think I'm running the same pulley size as the procharger Z setup, which gives a stock Z around 6psi. The A&A kit is much lower restriction than the procharger twin intercooler setup so I was hoping for 5-6psi with my mods.