powerdyne BD-11A/94 cobra
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They are a street supercharger and that is it, nothing more - nothing less. As long as your not trying to make gobs of power then you'll be ok.
No more then a 9 PSI pulley.
This is what happens when you over spin one.
this happened at about 5800 rpms about to shift into second. using a 2.87 (10lb) blower pulley and the stock crank pulley. headunit had about 6k on it, tops. zero track time
No more then a 9 PSI pulley.
This is what happens when you over spin one.
this happened at about 5800 rpms about to shift into second. using a 2.87 (10lb) blower pulley and the stock crank pulley. headunit had about 6k on it, tops. zero track time
The PD xb-1a is a geared unit that bolts right up. It is also oil fed so you have to tap the pan. Good luck finding one. They don't grow on trees. Good news, they can make alot more boost. I think there's one on ebay for 1700 or so.
Here's what I've learned about Powerdynes. Take it with a grain of salt, cause I'm not that smart to start with. Powerdyne is out of business, don't really matter cause they wouldn't help when they were in business. Another company is rumored to have bought them out and will be back in production before long(all rumors of course.) Powerdynes were and are the lower end of supercharger performance and quality. The shafts are prone to breaking. I broke the shaft removing the nut from the impeller. Broke off at the base of the threads. Powerdynes cannot be spun more than 36,000 or belt and bearing failure will occur. There are the exceptions to the rule though. Some have had one built by someone having a good day at work that has been reliable for years. A three inch pulley with a six inch crack pulley gives you 36,000 revs right at 6,000 rpm. They are easy to rebuild. That and the fact that you do not have to tap the oil pan are the reasons they are still somewhat popular. The fact they are the cheapest charger you can buy helped to. You can get better bearings and a belt that are advertised to 42 to 46,000. Can't comment; I haven't used them. A company called 928 motorsports has may upgrades for the Powerdyne. Their "Super Powerdyne" comes with a new billet shaft and their own impeller along with better bearings, venting holes in the case, shimming the impeller to get the most boost at a given rpm, and a gates belt. 928 claims that a built charger will flow 1300 cfm and has a better boost curve, meaning it will produce more boost a lower rpms rather than the boost curve being a straight line, it will rise faster and level off at the upper range. I have researched this cause I'm trying to convince myself to spend 1300 to have them build mine. I am waiting for a call back from the head tech guy to discuss it. I will let y'all know what he says.
good reply.well i went ahead and picked it up.everything but the belt.hopefully it doesnt come apart but its used.im going to look into the 928 thing.
i picked up the whole settup with injectors and the fmu,no meter for 200. and a 12ga. shotgun. :dancing6:so i cant complain to much.
i picked up the whole settup with injectors and the fmu,no meter for 200. and a 12ga. shotgun. :dancing6:so i cant complain to much.
Everyone I have spoken to recommends 42 lb injectors and a dyno tune. What size injectors did you get? If you plan on running the fmu, it is calibrated(kinda) for stock injectors. Bigger injectors will dump way too much fuel in boost.
cdsmith_2002
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I bought a used Powerdayn but I have not installed it yet. My take on it is that if you don't install smaller pullies on it, you'll probably be fine. If they held up over 9psi, they would have likely made it an option. It doesn't, so they didn't. The Powerdyne does get alot of bad 'press', which is a big factor in why you are able to buy used ones pretty cheap. Somebody has to be the 'worst' one!
Aparently, Powerdyne used to the SVO kit many years ago BTW.
I have talked to people who purchased Powerdyne this week. They explained that they have been waiting for legal problems concerning the purchase of Powerdyne, patten rights etc to be resolved. It sounds like to me that they are gearing-up for a possible come back. Oh, excuse me, I ment belting-up for a come back. The good news is, is that they answered the phone (although the automated greating says 'corproate offices', without referance to Powerdyne) and have followed up on my questions. That is a good start.
Aparently, Powerdyne used to the SVO kit many years ago BTW.
I have talked to people who purchased Powerdyne this week. They explained that they have been waiting for legal problems concerning the purchase of Powerdyne, patten rights etc to be resolved. It sounds like to me that they are gearing-up for a possible come back. Oh, excuse me, I ment belting-up for a come back. The good news is, is that they answered the phone (although the automated greating says 'corproate offices', without referance to Powerdyne) and have followed up on my questions. That is a good start.
cdsmith_2002
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13.90's? That sucks. There is 95 Cobra in my area with the 9# Powerdyne kit. It runs 12.50s on slicks. It was dyno tuned. I'll be pretty happy with real low 13's.
I went 11.77 at 118 with my cousins 94 vert, stock shortblock, F-cam, aluminum TF Twisted Wedge heads, TF track heat intake, fuel upgrades and 3.73's with 275-40-17 MT Drag radials, with a Powerdyne at 7.8psi on the dyno. The car made 427 RWHP and 434 TQ... I went 12.20 at 112 (i think) with the similar combo with home ported GT40's and the Cobra GT40 intake when it made 379 RWHP and 38X TQ with the Powerdyne. They can make some power, but they max out quick. They are not bad if you are looking for a little giddy up, but if you plan to race it on a weekly basis, or make some REAL power, get another charger... I MAY have a D1 for sale here soon, if a deal turns out good on this turbo kit Im looking at...
