Hey,

8- 9 lb pulleys are going to be available soon from Johnny Lightning.

A truck at WFC5 was running a 8-9 lb lower pulley only with stock internals. He was running low low 12's and I'm sure he was off the throttle (you can't run at the track in the 11's without a roll cage). He seems to be holding up well. Probably need our chips reburned, I would.

Seems like adding more Boost really does produce faster times. We used to think that 3-5 lb pulleys was our limit on the HP gain/heat issue, but JL always said the more boost , the more power.

 

What is it the size of our steering wheels.Will probaly have to put on a 4 inch lift so it does not scrape the ground.LOL

VINNIE

 

On stock internals? I wouldn't rev it past 5200!
To each their own

 

8-9lbs lower ?????

Whats next using a stock steel rim of a Civic?

 

That 8- 9 Lb pulley looked huge on the True blue truck at WFC5.

The trans. coolant lines have to be repositioned to get the pulley to fit in, not much of a problem to do.

It did look like a steering wheel down there..LOL

 

Going from a 4# to a 6# gives, what, 3 more HP and 9 more TQ? So i'm assuming going to an 8# will add up to an additional 1 HP and 5 TQ (maybe) over the 6#???

 

I have seen the Dyno Jet number comparisons between the 4 to 6 lbs pullies. The track results of the pullies seem better than the Dyno's. I don't know the dyno numbers between a 6 to 8 lb. But I have seen the track results with my own eyes.

 

This bring to mind a question I've yet to see addressed.

As a preface;
About 5 months ago, the #1 Ford tuner in the country (IMHO)
was here finalizing the program for the '03 Cobra. (he now works for Rousch).
They brought 2 iron 4V s/c Corba's and 1 iron 2V s/c GT.
Thru the 1/8 mile, the GT blew the 4V's away. The 4V's would pass it in the 1/4.
One of the reasons was pulley ratio's.
Colletti requires the SVT to wind at least 6250 rpms.
The 2V was limited around 5200.
The K-B units on these motors are only certified upto 14000 rpms.
As a result, the 4V's ran a 2:1 pulley while the GT used a 2.5:1 pulley, thereby making more boost.

So the question is, how fast can these Eatons spin without blowing up?
The larger the lower pulley the faster the s/c internals are turning.

 

I would be more concerned about the rods in the motor than the blower exploding

 

Stock lower end, that just sound like a problem waiting to happen.

 

im goin to have a built bottom end and have the truck dyno tuned....do you guys think i should be ok with this monster of a pulley?

 

As stated before by many of the top dogs in the Ford 5.4 area.

The motors should be able to handle 18-20psi with all stock internals.

There are many stock motors that blew up with 0-6lbs of added boost. There are many trucks out there that have 6-10lbs of added boost and have been fine. What is safe? I guess that depends of your level of thinking. Nothing is for sure when it comes to racing. I would have no problem putting 8lbs of extra boost on a stock motor with a PROPERLY tuned chip and all the other bolt on safeguards.....

 

i would not even think of driving with extra boost now without a dyno tuned chip. just dont feel safe. but what else would you need for all the other safeguards? im getting a new tranny and a built botom end? what else is there?

 

Cooler Plugs, 160-170 stat, & good gas are a few....

 

anything else?