Gotta agree with Mike. Spend a little extra and get an S trim or an ATI, anything but a Powerdyne. Get something that will last and that you can upgrade pretty easily when the time comes (and yeah, there will come a time, always does).

 

the only reason i baught the POWERDYNE was the price. if you guys are telling me that the 4.5psi really only pumps 3psi into the motor couldnt i just get the 6psi pulley from powerdyne? not trying to be cheap but im building a house this sring and im on a tight budget. to be very honest, i enjoy driving my camaro much much more than my 87GN. so the GN will be gone by this summer most likely and it was going to be running mid 11"s this summer, i know that next winter i will be putting some money into the camaro. so for right now i just want to get low 12's high 11's. because from what ive read a 383 stroker can make as much or more power and not have to worry about psi and compression.this whole set up is almost "temporary" in a way.i dont know how long itll stay. i love the thaught of forced induction though, so when the time comes it will be up in the air.but i will say that it will remain an LT1 FOREVER

 

I wouldnt count on running 12s with only a powerdyne. I ran a 12.26 @ 115 MPH @ 9 lbs of boost with only 4.5 id be supprised if you even brake into the 12s

 

I thought a while back somebody ran low 11's at 120 with a Powerdyne. . .

Then again, Frank95Z is running low 11's at 118 cam-only so maybe that's not that impressive. . .

 

guy in post #6 clames 10.6@129.5

http://www.superchargerhelp.com/showthread.php?t=3793

modding a pd

http://www.928motorsports.com/services/rebuild.html

diy rebuild

http://home.wi.rr.com/planestang/Zsu...er_rebuild.htm

 

Isn't that with the BD11, which doesn't come in the LT1 kit?

 

Found it. It's 94LT1_89TTA's car. Check this out:

"The engine is a 9.9:1 355 with stock crank, Manley 5.85" sportsman rods, and KB-197 hyperuetectic pistons. The heads are TFS LT1 G1's (yes twisted wedges) ported by Craig Gallant (GTP) in Houston. Same cam as yours. SLP headers, and 2OTL exhaust. Holley 58mm TB on ported stock intake. 42# injectors fed my a walbro 255L intank pump.

The PD is pullied with a 7" (crank), 3.1" (blower), 8 rib setup I had made by Autospecialties in Houston. I did that to eliminate belt slip. It makes 6 psi at 6500 rpm. I have broken (2) internal belts so far, but I have found a cheap source of parts, and replace them myself. I can only blame myself though as it was my choice to overspeed it. All in all it's been a good combination. It has been together for about 5 years. I tune it with LT1 edit, and it is run exclusively on pump gas with zero knock count.

11.80 @ 123.6 on street radials with 1.95 60' time."

 

If this setup is temporary just forget the FI and invest in a good heads/cam package that you could transfer to a 383 and save yourself alot of time and money. Hell, go ahead and buy the rotating assembly and another block and get started building it.

 

ok ive done some more studying and this is where i think im at. Iwant to go with the LE2 heads/cam from lyod. out of curiosity can i still use the POWERDYNE on his set up. i mean i already have the unit so i mught as well use it if i can. if not i will be selling the powerdyne. and do any of you guys know what kind of 1/4 mile times the LE2 kits with the boltons are running?

 

a little hijacking here...but whats the diff between the BD-10, BD-11 and BD-600

 

ok i was searching on another message board and some guy the is runnig an le2 heads/cam package with a supercharger. so i think if i ask llyod elliot to give me cam with a higher LSA and run the 6psi pulley than it should work fine. i know 6psi on stock is a little hidh but because of the 52mm,LT's, and PORT work on the heads and intake itll only give me around 4psi right?? and 4psi should be good for 60-80rwhp right???
Does anyone here know of anyone running a similar set up? does this set up make sense??
thanks guys

 

94LT1_89TTA's results were exceptionally good becuase he's a real guru and knows how do design things for a given application (ask me how I know ), he already had the blower and built the engine to make the most of low boost. Some others have had pretty good results without being so tech savy though ...just by choosing a good blower cam and pulleying the PD (yes, newer LT1 units are BD-11's ...mine is and it's six years old) up to 7 PSI or so even on a built 355.

Before I get into details, let me tell you in summary that if you plan to go with higher boost (like 10 PSI or more) later on you may as well return the Powerdyne now while you still can. If all you want in the end is 400 - 450 rwhp then keep it if you want, if you don't care about intercooling. Just understand that later on when you want to upgrade you'll need to swap blowers.

When people say "oh you'll only make 3 PSI once you've got headers and cam, headwork, etc" ...that's kind of irrelevant. PSI is just a measure of restriction at the intake, even though it says 3 PSI it doesn't mean you're only making an extra 40 HP. The blower's still pushing enough air to make 4.5 PSI on a stock motor, it's just that the revised heads/cam/headers flow better and cause less restriction, so the air gets through the engine more efficiently ....and it's still making an extra ~70 HP from the 4.5# kit.

That being said, your detonation resistance will improve some with those same mods that dropped the boost, so you can afford to pulley it up a little more. IMO if this is only temporary anyway and you don't mind maybe blowing it up, go ahead with a larger crank pulley and keep your 3.13" 4.5# kit blower pulley (greater surface area for belt to grab). Have ASP make a custom 6.5 - 7.0" pulley to get you in a more fun boost range for those mods. You're just not going to feel much at the low and mid ranges with the 4.5# kit, and that's where you do most of your driving.

I don't think an S-Trim is a whole lot more money, maybe $600 more or something? ...if I were you I'd probably return the PD and get an S-Trim. I favor those because they are so flexible (low boost to relatively high boost, intercooling/aftercooling options too) and reliable even when bought used. They have the nice spring loaded tensioner so you're not always fighting the belt tension and risking overtightening and ruining bearings and their fit and finish is just better.

If you want more power later on and money's an obstacle, maybe return the PD and shop for a good used Vortech or ATI, or look around on E-bay ...or, cough up a little more $$ ...IMO it's worth it and I'm a PD owner. I'm not bashing PD, as my ride makes approx 450 rwhp with one and is a blast to drive....but it's pretty much at it's limit and the blower's already been rebuilt once from a minor failure. My next step up is a V2 w/Aftercooler at about 9 PSI ...about all my engine's built to handle. I wish I had bought a V1 to begin with back in the day however.

If you want more detailed stuff let me know.