powerdyne + new wrap + 2.75 grooved

[John_D.]

When the boost hits, it shoots right up to 6 psi.

As the rpms climb, I hit 10 psi.

When it shifts, it goes back to 6 psi and starts all over again.

I'm hitting 10 psi in every gear, every time. :D

[Tyler]

time for you, my friend, to go to the track

[Ian]

that sounds like a good time to me.

10psi = 10" smile

[98GREENGLOW]

Sweet......Now thats what Im talking about. The initial hit is the most important part.

Say your only running the 3.1 , 6 pound pully.Your initial hit on all gears will be any were from 3-5 psi and then build to 6 -7 psi before redline. So for most of your gear your only actualy getting 3-5 psi and get that little peak of 6-7 right before redline. Sure youll get gains from that but only 1-1.5 seconds max. The initial hit is low boost.

Lets just say that after parasitic loss and all you get actual 10 rwhp per each pound of boost. If the initial hit is only 3-5 pounds then you will be getting any where from 30-50 extra hp on the initial hit. Thats good extra hp but its not gonna throw you back in your seat, then the extra 2 pounds you get as redline comes closer is (6-7 pounds) gone before you have a chance to even look at your boost guage in most cases.

Now that we can actualy get the pully to stick ITS A HOLE DIFFERANT GAME... You say that your initial hit is 6 pounds and that it builds up to 10 psi before redline...DAMMMMM!!!!! Now your getting 60 rwhp on the initial hit! So that means that your car is actualy getting some time with 7-9 pounds before it hits the redline and shows 10 for a split second. NICE

Man wish I would ave ordered a 2.75 now......Well guess a 2.8 is pretty close though right. I should be peaking right around 9.5 or so. Hope mine hits right at 6 psi and then builds from there too. I think right now mine hits at about 4.5 psi.

Im so happy that Im not the only one to see 10 psi with the powerdyne. I thought people were gonna think I was lying or somthing.

Once I get mine on then well have two people showing that your desighn and a grooved pully is all it takes. There are people running 11-13 pounds on the powerdyne. If I dont have any problems with slippidge on the 2.8 pully then I will order a 2.65 pully after I get the alcohal injection from SMC this FEB. Dont worry if it dies on me from running 11-13 pounds then I ve got some spare bearings and a inner belt coming to me in the mail right now anyway.

Man JohnD I just cant stop writing. Im soooooo excited right now. I remember a time (not so long ago) when I couldnt even hold 5 pounds of boost for more than a day without it slipping down to 3-4. Now look at us!!!!!

[John_D.]

<blockquote>quote:</font><hr>Originally posted by 98GREENGLOW:
So that means that your car is actualy getting some time with 7-9 pounds before it hits the redline and shows 10 for a split second. NICE

Man wish I would ave ordered a 2.75 now......Well guess a 2.8 is pretty close though right.

Man JohnD I just cant stop writing. Im soooooo excited right now.<hr></blockquote>

Yeah the 10 is even more than just a split second too. It climbs right up there and holds for a bit, before it's time for the tranny to shift.

The 2.75 and the 2.8 are going to be really close.

I'm pretty excited too. :D

[John_D.]

<blockquote>quote:</font><hr>Originally posted by Tyler:
time for you, my friend, to go to the track<hr></blockquote>

I'm eager to see what it runs! [img]smile.gif[/img]

Wish I had a blower cam in it...

And I wish I had those ssm heads and intakes installed, instead of sitting in the cabinet in the garage.

[98GREENGLOW]

Nice... It actually holds it for a little while.....It makes since though. The smaller pully spins faster and gets to the top boost quick.

I suppose thats because your actually just asking the pully to do what it's supposed to do. The 2.75 is suppossed to roughly make between 9-11 pounds (assuming that the 2.93 powerdyne sells is good for exactly 9 pounds as they advertise). So your pully is good for 9-11 and your asking it for 10. So it gets there and holds it for a while. SSSWWWEEEEEETTT!!!

On the 3.12 (6 pound pully) we are only suppose to see 5-6.5 pounds of boost. The average between those too would be a max of 5.75 pounds of boost. If I just asked it to do what it was desighned to do then I would also get to watch 5.75 pounds just stay there for a while before changing gears.

Makes since......I need my 2.8 custom grooved pully from ASP racing NOW!!!!!!!!

[Mighty Thor]

Whoa, that's awesome. Congrats.

The 2.75 Pulley from ASP, how much was it?

Thanks [img]graemlins/burnout.gif[/img]

[John_D.]

<blockquote>quote:</font><hr>Originally posted by Mighty Thor:
Whoa, that's awesome. Congrats.

The 2.75 Pulley from ASP, how much was it?
<hr></blockquote>

Mine?

It's the pulley that came with my used kit. I got it from Perry V in Canada.

When I got it, I saw that the pulley was not running in the same plane as the other pulleys, and the belt had worn the pulley at an angle. I had to put one 14 gauge and one 18 gauge bushing behind the pulley to get it in line.

It was a 2.8 pulley according to my calipers, measuring a point where the belt wasn't rubbing. Either Perry, or the owner before him, must have gotten the 2.8 somewhere.

I took it to a local shop and had them true it up again, and it's now about 2.76 (but 2.75 is an easier number to toss around...) [img]smile.gif[/img]

A couple of weeks later I took it back to the same shop and had them add five 1/16" grooves. They had to use a small file to tool it, because they couldn't make a 1/16" cutting tool that could survive the plunge into the pulley.

It was $10 to true it up, and they did the grooves for free (I was surprised, but I think the guy was not willing to charge for the filing job, even though I thought it looked fine, he thought it was not up to par for the quality that comes out of his shop).

[Mighty Thor]

Is your 1/16" groove going 360 deg. or side to side?

I have a 1/16" going 360 deg. plus 4 1/8" groove going side to side.

[John_D.]

<blockquote>quote:</font><hr>Originally posted by Mighty Thor:
Is your 1/16" groove going 360 deg. or side to side?

I have a 1/16" going 360 deg. plus 4 1/8" groove going side to side.<hr></blockquote>

Yep, the grooves go all the way around.

I just now realized I'm calling them 1/16" grooves, but they're smaller, closer to 1/32".

1/32" is what I asked the shop to do.

I liked the width, but thought the depth was a little too light. So I ran down to Lowe's, bought a coping saw (they have a very thin blade), put the pulley in a vise, and went around the pulley sawing the grooves just a bit deeper. That probably opened the width by some tiny fraction of an inch, but they're still very close to 1/32".

I didn't want the grooves very deep because the material remaining on the pulley was only about 1/4" and I didn't want to weaken the pulley.

[98GREENGLOW]

Yea you can barely get a fingernail in the 1/32 but they hold boost pretty good for me. I think that 1/16 may be just right but also possibly close to tearing up the belt....Oh well.... WHO REALLY KNOWS???

[98GREENGLOW]

Hey JohnD... Im not sure if you were already going to or not, but I would really appreciate it if you could give a status eevery few days and let us know how the 10 pounds is holding and if you had to retighten the belt or add dressing or anything. THANKS

[John_D.]

I sure will. [img]smile.gif[/img]

But my Apexi box, or the wiring, has a problem, so the car is sitting right now. The maf reading is dead on it. I've narrowed it down to the output signal between the box and the pcm, but haven't gotten far enough to know if it's the box or somewhere in the connections.

[98GREENGLOW]

Guess you havent got her running right yet but Im hungry for some more details....I found out that my pullies not gonna be here for a week. SUCKS...

Did you notice a noticable difference between 6 and 10 pounds? What was the SOTP difference?