Another new best for my Powerdyne SS

Well here it is I did this at MIR at the Modern F-Body Shootout.
60 1.550
330 4.565
1/8 7.120
MPH 96.07
1000 9.329
1/4 11.192
MPH 121.10

I ended up second in the quick 8 unlimited I ended up running Joe Overton
I think I scared him he only ran 9.935 I ran 11.27 in the final round.

These times are incredible for a stock headed Powerdyne I'm glad I have plenty of witneses or nobody would beleive this :)

Jeff 96 SS

Damn what do you have under that hood? What kind of cam!!! I want one of them too!

You are not going to like what Jeff has to say about his Cam....

Jeff, wanna break it to him? Be easy now...lol....

MODS- 1.6 RR, 52MM TB, AS&M 94-95 style headers with dual cat Random-Tech Y-pipe, SLP cat-Back, LT4 Hotcam, Powerdyne making about 7.5#s of boost, custom ASP 7-inch crank pulley to give me my boost levels I'm spinning that little powerdyne up to its redline, aggressive custom tuning, Race gas, and the Pro Yank 3600 Extreme converter this converter is Awesome its very efficient and allows me to really put all the power to the wheels all the way down the track.
Stock Heads and Bottom end. Oh Ya a realy good driver :)

Jeff
96 SS
96TA

Well done Jeff!

I'm running a very similar setup and also have no power complaints - that little cam sure does a nice job when coupled with a little blower:D

Good driver helps too;)

I guess the hotcam isn't all that bad :p

Jeff, have you ever dynoed the car?

I did a baseline dyno with this combo a few months ago the third attempt was the only one that didn't shift down to second gear. so the car and blower were very hot when this run was recorded.

SAE 408RWHP at 5500 and 411RWTQ at 4400

it stayed at 408 from 5500 to 5900 where they shut it down.
they had to ease into the throttle to keep it from shifting so I think the real TQ #s are much higher and come in at lower RPMs.
The numbers would have been much higher with a cool engine and blower. My runs at the track are usually with cool engine and blower.

I think this is a good example of the way dyno #s don't translate to track times because it's simply not possible to run 11.1 with 400RWHP in a heavy car like mine.

Jeff

WOW. :bow:

What is your race weight? What items have you removed from the car?

The temperature has a lot to do with it. My engine kept losing power after consecutive dyno runs. One thing the dyno doesn't simulate is real world conditions, like cool air entering the engine compartment and intercoolers. They did put a fan up during the dyno, but this is a joke compared to the actual conditions.
I think you are correct about the 400 rwhp generating low 11 second times, the 400 seems a little low.

I haven't removed anything its a fat pig fully loaded SS leathe T-Tops. Ive only added weight sub frame connectors supercharger and a glove box and console full of crap :) The car is close to 4000 pounds with me in it I'm 6'4 about 235.

Jeff

Great numbers Jeff ;) I just can pray and hope i make somewhat close to your dyno numbers......my car has a lot of little things done and really a good set of P/P heads and larger valves except i chose to stay with the stock cam:( which that might hurt check my sig what do you think ...The only thing i have going for me is that i have a great shop doing the work and Doing the complete set-up and wide band tune......this is the place doing the car...WWW.CARTEK.NET so what you think THANKS AGAIN...

And let me say again great times:bow:

What suspension/tire mods did you have to pull of that 1.5 60'????

Those are some beautiful times man... 11.1, so basically you could be in the 10's with no modification to the bottom end, that's nice. When he said hotcam I read that over a few times, I mean it is a nice cam but to make a PD car go that fast on stock heads, holy ****. Congrats...

I haven't done much of anything to the suspension. IRS LCAs, Hothckis sub frame, I have 1LE springs all the way around stock shocks, skinnies up front and ET Streets. I did this with a stock rear also :)

Jeff

hey Jeff is your SS black? I believe I saw it at the shootout, I was in the sunset orange SS, those are some awsome times with such little mods that you have

Yes its Black.

jeff

Wow Jeff! That puts my new best to shame (8.3 @ 90 MPH with 2.02 60 ft and spinning 555R's about 300 feet) and you're on stock heads! Dang, when it's rebuild time for me I may not worry about the heads and might just go with the good old Hot Cam after all! I've mowed over a blower cam for quite some time now, most of the ones I'm interested in are similar to the Hotcam anyway .....maybe I should just go with it. MPG and off idle response decent?

Say, did you ever do any tuning over at John's or did you just have it done at the other place? I've found that a dose of race gas or BTM retard takes care of my knock retard completely ....so I guess he did put a little too much timing in mine after all but it's cool, I kind of like it like that actually....now that I know for sure what's going on.

BTW, do you have to run race gas at the track for the "aggresive tuning" you speak of or can you get by on pump gas.

Excellent run man :bow:

I have always liked the Hot-Cam My car went 12.40 @111 with the same mods before the powerdyne was installed. The Cam has good street manors N/A and Blown. One Thing I'm Doing is running alot of timing and fuel MY A/F is down in the 11.5 range this is where I make the most power. Most people run less timing and 12.5. I do run race gas at the track and pull timing on the street. My car would go boom with pump gas and full timing. That cam works for me!

Jeff

Originally posted by Jeff 96 SS
I. Most people run less timing and 12.5. I do run race gas at the track and pull timing on the street. My car would go boom with pump gas and full timing. That cam works for me!

Jeff

I guess you are pulling timing with a BTM type of box on the street.

How many miles is your car driven weekly?
And how much timing are your pulling when on the street when running on 92 octane?
Finally, how much timing are your running @ the track and are you running 104 Unlead octane?

VERY IMPRESSIVE TIMES MAN!!:metal:


Thanks,
Claude
Claude

Yes i pull about 2 degrees per pound of boost on the street.

My car is very rarley driven on the street I bought the car new in 96 and it has 33000 miles on it. This is about to change though this car will soon be my daily driver. I have 96 TA 396 D1 that is taking over the racing duties. I just need to get that damn thing running good it currently has fuel and ignition issues.

I run between 34-36 degrees at WOT and yes its usualy with 104 octane.
MIR only has 111 Octane so thats what I was running when i ran the 11.19.

Jeff

Wow!!

Thanks for the info broh.

Its Much appreciated.


Thanks,
Claude

Hold on with that 396 and the D1 :eek: Can't wait to see what that will run. How many runs have you made on the stock rear?
I kinda want to get a moser 12-bolt or ford 9-inch before I run my car at the track, what do you think?

I have made probably 300 passes on this rear most in the 1.7 1.6 range. i have only made 10 passes with the new converter and all very low 1.6 or 1.5. I'm sure this rear would break very soon if i abuse it with many more 1.5 launches.

If your not worried about spending a few hundred extra get the currie 9 inch, they come assembled and ready to bolt up.

Auto cars can get away with neck snapping launches on the stock rear for a long time manual cars will brek the rear quick and when it goes chances are your DS will go to and that can get expensive.

Jeff

OK last question(s) for ya broh.

What do you have done to your Tranny to make it last that long?

Do you have stronger drums/hubs for that tranny too?

How many miles do you put on that car yearly?

Thanks,
Claude

I have a TransGo shift kit set to the hardest shifts possible thats it. other than that and the conveter. the rest of the tranny is stock. Oh ya I have broken two stock flex plates, now I have a B&M flexplate.

I will say my tranny isn't very happy after 10 launches with the Pro Yank 3600 Extreme converter. That is a monster conveter and I doubt I would get another 10 passes with 1.5 launches on the stock tranny.

i might have put 3000 miles a year on the car the last 3 years.

Jeff

Jeff, I now see the difference between your car and mine :) . We have a similiar setup, but I am definitely a chicken, and you definitely have "no fear". I do have a question about the pulley setup on the Powerdyne. You are running a 7 inch ASP pulley on the crank, but is that a 6lb pulley on the blower to get the 7.5 lbs? I would like to bump up to the same boost level.

-Ernest Nichols
95 Z with 6lb Powerdyne
12.2@114 1.8 60ft

Originally posted by Jeff 96 SS
I have a TransGo shift kit set to the hardest shifts possible thats it. other than that and the conveter. the rest of the tranny is stock. Oh ya I have broken two stock flex plates, now I have a B&M flexplate.

I will say my tranny isn't very happy after 10 launches with the Pro Yank 3600 Extreme converter. That is a monster conveter and I doubt I would get another 10 passes with 1.5 launches on the stock tranny.

i might have put 3000 miles a year on the car the last 3 years.

Jeff

Cool thanks for the info. I just wanted to see how much abuse my trans would take with my new set up before it went boom! I have the trans go shift kit in there with 2800 Vig stall, kevlar clutches/bands and a Huge B&M supercooler. Hopefully it will last as well as yours.

Thanks again,
Claude

No it's the 4.5# pully on the head unit wiith this combo you will hit the blowers redline between 6100 and 6200 RPM so don't miss to many shifts or you will be rebuilding your head unit. this combo also helps with belt slip priblems you have more contact on both pullys.

Jeff

Another approach you might consider if you're having ASP cut a crank pulley anyway. Go ahead and get a blower pulley too, and have them cut for 7 ribs. I am currently running a 7" x 3.2" 7-rib pulley set ASP made for me. Like Jeff said, the additional belt wrap is good, and the 7th rib is more yet. This combination has virtually eliminated slippage in my case. The right belt is a Kelley part number. I credit this with allowing me to not overtighten it, while still curtailing slippage.

Rog

Hmmm, not a bad thought. Two questions here:

1. Can someone help me with the calculations for the size pulley to get if I have the 6lb Powerdyne pulley on the blower now?

2. If switching to a 7 rib is good, can someone tell me what size belt that might fit and where I can get it?

I must say, 12.03 at 123 is quick, what are your mods?

-Ernest
95 Z with PD
12.2 @ 114

My stock 6# pulleys were a 6" crank, and 2.93" blower. The internal step up ratio of the PD is 3.05:1.

Impeller speed is RPM x ((crank pulley diam / blower pulley diam) x 3.05)

So if your redline is 6000, then the impeller speed you now have is 37,474 rpm. PD told me the head unit's redline is 43k rpm.

My 7" x 3.2" combo at 6,500 rpm then is 43,367 therefore I'm tapped out at 6,500.

I will go home and see what belt length is on the car tonight, I know it's a Kelly 7-rib, but I don't remember how long.

My car has ported TFS heads, SLP shorties/cat back, a 224/230 XE cam, 42# injectors with no FMU, and I use LT1 edit to tune it. The combination makes 5.5# of boost at 6,000 rpm, and I run it on pump gas with no knock retard.

Rog

Ok, good info on the step-up inside and the formula. Using it, it looks like a 6.75" pulley with the 2.93 6 lb pulley should let me take it up to 6200 (putting it at maximum [43k]). Normally I shift at 6000RPM, so that gives me a little room if I am late.

Also nice to know that I'm not near maximum right now.

-Ernest
95 Z

I wouldn't leave that 6# pulley on. find a 4# pully I'm sure alot of people that upgraded have them lying around. Your belt will slip with the combo you are talking about using. Someone posted a while back that they were seeing 9#s from their powerdyne with the 7inch crank and 6# head unit pulley so be careful 9#s is alot of non intercooled boost.

Jeff

Man, it seems like all the locals are coming out in one thread…

WRT the dyno vs track times… that doesn’t surprise me… my brother’s car (4 door LTD) has been turning out regular 120mph passes (even at 75&80… too bad they closed today) on a combination that has only dyno’ed at 326hp

To get the belts… try any car quest store (small car parts stores that belong to the chain, somewhat like most corner hardware stores appear to be Ace hardware stores even though it’s usually not in their name). They’ve been pretty good about getting any size 8 rib belts we’ve looked for…

Earnest,

I checked the belt size on my 7-rib combination. The lettering is worn off, but it is whatever Kelly 7-rib belt is closest to 42 inches. Looks like maybe 42.25". Definitely longer than a Gates 41.5" 8-rib because I have one of those in stock, and it's a little too short.

Keep in mind this is only the correct length for a 7.0" x 3.2" combination. If you decide to run a 6.75" as you've proposed, you will need to cut and try with the belt length unless you find someone whose done it already.

Rog