onebadblackz

iTrader: (1)

are the powerdyne superchargers any good......

and does this kit come with everything I need like should I change injectors or anything else........

94z28L

iTrader: (4)

there will be some things that need to be changed, fuel pump, injectors, plugs, ignition, a tune. there's mixed reviews on powerdyne units, there are people running them tho

onebadblackz

iTrader: (1)

ok one more ? ...... what is a lt-1 over 30

94z28L

iTrader: (4)

im guessing its in reference to the cylinder bore being bored .030" over the stock bore of 4.000" so its probably in reference to building the motor with forged internals and doing a clean up bore

onebadblackz

iTrader: (1)

no what size is it like 355 what because mine has been bored over .030''

JL8Jeff

iTrader: (14)

Yes, .030 over on a 350 makes it a 355. I ran a Powerdyne 4.5 supercharger for almost 5 years with no problems. The only thing I did was upgrade the injectors to SVO 24 lb injectors because they actually flow more like 26 lbs. If you go with the 6 lb Powerdyne then you need the fuel pump and ignition upgrade as well.

onebadblackz

iTrader: (1)

how much more power did the 4.5 give you??? how much HP is the 355 then......

Fire67

iTrader: (3)

4.5psi isnt worth the money for the power you'll make... I think the best I ever got outta the powerdyne with 6psi was 364rwhp...

IMHO 6psi isnt really worth it either though. Especially without intercooling.
I didnt run 4.5psi for very long at all, but it was barely noticeable.
Here's the deal on 'Other' items needed... The powerdyne kits come with an FMU, throw it away or sell it and buy some SVO 42# injectors. The kits also come with an inline Walbro 255lph pump thats supposed to act as a booster pump to provide suplemental fuel volume and pressure... Dont bother putting it in, just get an in-tank 255lph pump and keep your fuel filter.
You'll def need an ignition upgrade as well, but I believe the 6psi kit come with an MSD box anyway.

Make sure you get a good tune to run the blower with those injectors, or you will damage the motor.

Fire67

iTrader: (3)

Oh yeah, as far as durability, Vortech and Procharger stomp all over the Powerdyne! Hands down, the powerdyne is a cheap POS.

JL8Jeff

iTrader: (14)

The Powerdyne works fine. It was never meant to give you 200 hp so don't expect it. Any supercharger making 6lbs or higher boost on a stock LT1 will damage the engine so it doesn't matter what brand you get. The Powerdyne 4.5 gave a nice little kick that was very noticable and the FMU worked great for 5 years so no need to throw it out. The 355 makes no difference over the 350 for power, the overbore was needed to clean up the cylinders. I put 42K miles on my Powerdyne 4.5 on my 93 Indy Pace Car with no problems, no custom tuning, no extra fuel pump. Just bolt it on and go. I upgraded the injectors to the SVO 24's because the 93's had 22 lb injectors stock. The 94 on up cars have 24 lb injectors stock so they should be fine.

onebadblackz

iTrader: (1)

ok so I could beat a stock ls1 with a 4.5psi powerdyne????

onebadblackz

iTrader: (1)

the motor is 3 weeks old and my brother had it bored .030'' when he bought it... he put it on a dyno with a CAI and he was running around 305-307rwhp

JL8Jeff

iTrader: (14)

Those numbers pretty much match a stock LS1. So you wouldn't need much more to beat one. I don't know that I would put a Powerdyne on an LT1 that is already making that kind of power. You need to find out what cam, what pistons, what compression and more details about the engine before going any farther.

Fire67

iTrader: (3)

While all of this may be true for 4.5psi... My experience with 6psi on an otherwise stock motor led to alot of that stuff no longer being true.
The FMU would give me a diff fuel pressure at 6psi boost every time I pulled through the rpm range. I expected to see this some, as its known that FMU's are inacurrate.. But on the dyno it went incredibly rich one run, then so lean it started detonating on the next run. After a cooldown we pulled her one more time and got a close to perfect A/F ratio.
The amount of variance from run to run scared me right into bigger injectors and a custom tune. Bye Bye FMU

Yes, adding boost to any motor will shorten its lifespan, but adding boost CORRECTLY can reduce the hit in lifespan dramatically. Installing the 42# injectors didnt cost me much more than those SVO 24's would have, and I got rid of the inconsistent FMU.
Plus, changing injectors is a mod that requires custom tuning. Otherwise your pcm will not be able to adjust fueling correctly. I guess something within 2# of your stock injector flow wouldnt be as noticeable a diff as almost double the flow. But it for sure wouldnt be as efficient as it could be.

FWIW, I ran the Powerdyne untill it broke at 45K miles... Then I bought the Procharger and made 100 more HP with 2 more psi and intercooling. My motor lasted another 7-8K miles before a piston ring finally gave out. No signs of detonation anywhere.
If setup and tuned properly, these motors can survive boost for a long time. Or you can do it the cheap way use an FMU without any tuning and blow it up really short of what your engines lifespan can be.

onebadblackz

iTrader: (1)

he said stock

onebadblackz

iTrader: (1)

can I change the pulley on the 4.5psi powerdyne

burnzilla

iTrader: (3)

Powerdyne

ProCharger


IMO, the 4.5 PSI aint too bad, if you have a good running motor, and just want a nice boost in power w/o having to change any internals.
Anything more than 5 PSI on an LT1 isnt recommend anyways, so in that respect, its a nice little kit.
Just my .02

JL8Jeff

iTrader: (14)

Yes, you can change the pulley on the 4.5 to run 6 lbs or 9 lbs. But you will blow up the motor if it has stock pistons. The LT1 has very thin ringlands on the top of the pistons and that's why any supercharger 6 lbs on up will break the motor eventually. But I wouldn't put a Powerdyne on a motor that has already been modded like what you have. You're already 75-80 rwhp above a stock LT1. My FMU lasted fine for 42K miles when I sold the whole kit still working. So you spent a lot more money on a Procharger and blew up the engine! When the Powerdyne was working fine on the engine with no damage! The engine blowing up had nothing to do with the Powerdyne supercharger, it was your fault for putting too much boost on a stock bottom end! That's what I keep telling people, keep the boost low or build a short block for it.

onebadblackz

iTrader: (1)

its only bored over .030'' thats it... besides that CAI and the rest is stock

azvforce

iTrader: (-1)

I made 340rwhp/372rwtq with a 4.5psi Powerdyne on a totally stock LT1 with a stock tune and Hooker shorties. My coolant temp was over 210* and the ambient temps were over 100*. I switched to the 6lb pulley a month later and started getting alot of blowby shortly thereafter.