supercharging lt1

Hey guys im just new to this board and to lt1's as well. i own an 87gn but i just baught a 97 z28. its a daily driver for me and my gf in the summer(im from montreal, canada) so its away for the winter. Anways i had it at the track this fall and i layed down a best of 14.025. Its bone stock with a k&n filter. It's a 6spd on 17"rims. To the point now, there are alot of subaru sti's and some quick ricers around here so 14 sec aint enough. I just baught a 4.5psi S/C FROM POWERDYNE, a 52mm TB, Lontubes w/y-pipe, short shifter and thats it for now.its has stock 3:42 gears. so my question is before i send my pcm to PCMFORLESS, WHAT ELSE SHOULD I DO??? ive got a few ideas but not sure if they would be worth it....like.......4:10's...custom cam...port stock intake and heads.... keep in mind its a daily driver and i just want to stay ahead of STI's and COBRAS's.any thaughts or advive would be great.

with bolt ons and that powerdyne, you should be fine. Keep in mind though, adding custom heads and cam will shorten the lifespan of your bottom end. You could do something such as a cc305, or hotcam (idk if either of those are good blower cams tho) and the supporting valvetrain and be fine. 4.10s would be a fine idea as well, but remember, our rear-ends are weak, so maybe upgrade to a 12 bolt and do 4.10s. With the power your wanting to make, your gonna want a new rear-end to get decent launches anyways

get a bigger fuel pump to be safe..it will allow you to push more boost later too
also get some spark plugs...get the ngk tr6..there a heat rangd colder

thanks guys , by the way what kind of 1/4 mile time are you gettineg with your mods

i wouldnt get NGK get good ole cheep autolite 104s gapped around .35.. get a better fuel pump and probably somthing pretty mild as far as a cam like a CC305 would probably work pretty well.. you also might not wanna go with 4.10s
those are pretty short gears for FI you might want too stick with the 3.42s or go 3.73s if you want too change them for whatever reason

Send the Powerdyne back and get any Vortech kit. Aftercooler or not, T-trim, S-trim would all be better than Powerdyne. In fact, even a butt-turbo is better than that blower.

even a butt-turbo is better than that blower.

bahahahaha:bow:

Send the Powerdyne back and get any Vortech kit. Aftercooler or not, T-trim, S-trim would all be better than Powerdyne. In fact, even a butt-turbo is better than that blower.

a LE3 heads cam package would be better than a powerdyne unit, dont expect much from 4.5 lb of boost.

ive heard some good things and some bad things about POWERDYNE. but on the other hand every part out there ive heard good and bad about. are you speaking from experience? i actually got the S/C of a guys 97 firebird. he put 2k on it, but the had to sell the car. i could have baught the car w/ the S/C but could work that out seeing the car was in the US and im from Canada. the only other mods he had were 3:73's, muffler, hypertech programmer, a set of drag radials and he was running 12.6. they guy was very honest. he also told me that when the car was stock and he changed the gears to 3:73 he ran a 13.7, which is very believable. so im figuring with my Longtubes, y-pipe w electric cut out, 52mm tb, short shifter and tuning and now most likely cc305 cam and 1.6rr, low 12's high 11's will be reached. any thaughts?
what would the LE3 kit give me? its not to late to change plans, this is my winter project. thanks

The powerdyne is not the best blower choice. Most of the guys around here will not say good things about it. 10.5.1 compression is not the best for boost and the le3 heads and cam setup would make the same amount of power. plus the stock shortblock will last much longer.

Expensive route: change up the bottom end (pistons, crank ect.) and run some more boost.

Cheep route: Get a blower cam, and some suspension mods.

not my favorite blower because the tech assistance sucked. the last one i put on was on a impala ss and the tuning was so far off i could die. but yours wasa off somethinf else. the blower is ok. but put a smaller pully on and get the thing tuned.

replace the fuel pump. and i like 3.42s for most blower cars on the street.

i ran a powerdyne, and for a daly driven street car they are just fine.. its not a BAD unit.. obviously there are better ones espcially for cars that are raced alot.. the powerdyne is a cheep simple unit that will work well with your bolt on car but you better keep it at or under the 6is psi mark and get it tuned by someone THAT KNOWS WHAT THEY ARE DOING or you will be rebuilding it very soon.. but my opinon on the powerdyne is fine.. there are ALOT of guys that actually own one for themselves that are pleased with them.. its a good entry level unit.. id buy another one if the price was right.. its all about your desired power level

so you guys think i should keep the stock 3:42's... thats good to hear.i know everyone talks bad about POWERDYNE but thaey are all runnig over 500hp. this is going to be daily driven, just want something to saty ahead of WRX and COBRAS., both stock of course.
i dont plan on going over 4.5 psi(for now anyways). im keeping the stock bottom end. so heres the complete list of what im going to go with for now:
-4.5 psi powerdyne
-52mm tb
-cc305 cam
-stock ported heads and intake(can get it done for $700)
-1.6 rr
-longtubes w/ y-pipe and electric exhaust cut-out
-pcm tuning by pcmforless

do this seem like a good combo, i should pump out more than 400rwhp right??? still open for opinions though..... i really appreciate all the advice and help guys, thanks

with those extra mods youll never see 4.5 lbs of boost. I ran a pOWERDYNE with a very similar setup. Try a whopping 3 full lbs. at 6200 rpm. It takes 2 lbs. worth just to run the blower so even if you make 4.5 you still wont make that much extra power. I agree with the others, get a kit from Vortech or Procharger and do it right the first time.

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

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/Zsupercharger_rebuild.htm

:think: :shrug: :)

guy in post #6 clames 10.6@129.5

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

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

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:think:

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.