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View Full Version : Upper or Lower Pully ??

Dustin
06-13-2005, 12:16 PM
Im looking to swap one of the two out, and not sure 100% on which one I should do.. So others that have did this mod ( Jeff and crew ) which one did you swap out, and did you gain the HP like you thought you would, or would you change it around to where you would have done the opposite ???

~Dustin
DNeinstadt
06-13-2005, 02:14 PM
Swapped my lower pulley last night, ask Jason how it went. :(

Dan
Kafn8td
06-13-2005, 02:15 PM
Is it on?
DNeinstadt
06-13-2005, 02:31 PM
Not yet.
Retics4me
06-13-2005, 05:53 PM
It will be when he gets the bolts . HIs lower was on there pretty good but we managed to get it off . DId you get the preditor to work Dan?
Retics4me
06-13-2005, 05:54 PM
Dustin just go the same route as most and get a cageless lower pulley.
You can find them used all the time for around 125 or so .
Dustin
06-13-2005, 05:59 PM
Any suggestions for a place to purchase it ?? And I would assume a 4lb pulley as well ?

~Dustin
Retics4me
06-13-2005, 06:08 PM
Look in the classifieds on www.nloc.net and a 4 pound will do you just fine . Otherwise you can get a new one from JLP or PSP
Dustin
06-13-2005, 06:53 PM
I would assume this is what I would want to order ??

Lower Pulley (http://www.johnnylightningperf.com/shop/product_info.php?products_id=40)

~Dustin
Retics4me
06-13-2005, 08:43 PM
I would assume this is what I would want to order ??

Lower Pulley (http://www.johnnylightningperf.com/shop/product_info.php?products_id=40)

~Dustin


Yuppers and youll love the difference in power !!
Video_Master
06-13-2005, 08:54 PM
Why not go with a 6lb pulley?
Dustin
06-13-2005, 09:11 PM
It may over blow the charger itself .. and that im guessing it a bad thing. From what i've seen on the ford truck world site, most others w/ Lightnings are staying w/ the 4lb pulley

And Jason, what is the difference between the 8 rib and the 10 rib belt ?

~Dustin
Kafn8td
06-13-2005, 09:17 PM
And Jason, what is the difference between the 8 rib and the 10 rib belt ?

2 ribs.
Dustin
06-13-2005, 09:18 PM
And that means what ( smart ass )

~Dustin
Kafn8td
06-13-2005, 09:28 PM
:oogle: just a wider belt. You will be fine with the stock set up - 8 rib.
Dustin
06-13-2005, 09:36 PM
:oogle: just a wider belt. You will be fine with the stock set up - 8 rib.

:worship: Thank you oh great one

~Dustin
DNeinstadt
06-14-2005, 08:16 AM
Tried to get my stupid belt on last night and the belt is too short - 68".
Anyone got a 68.5 or a 69" belt?!!
Yes, I hacked the Predator and got it working... :googleeye
Dan
Retics4me
06-14-2005, 09:22 AM
Tried to get my stupid belt on last night and the belt is too short - 68".
Anyone got a 68.5 or a 69" belt?!!
Yes, I hacked the Predator and got it working... :googleeye
Dan


Dan break of the little stop on the tensioner . Alot of people have done it this way .
DNeinstadt
06-14-2005, 09:32 AM
Is a 68" the right length for a 6#??
Dustin
06-14-2005, 09:39 AM
I personally have no clue. I just e-mailed the company that I bought mine from and asked what length my belt will be for my 4lb that I ordered.

As soon as I find out what the length is, i'll get a hold of you asap Dan.

~Dustin
Retics4me
06-14-2005, 12:54 PM
Dan I think I have a belt for you ill go search the garage
DNeinstadt
06-14-2005, 12:56 PM
I will break the tensioner thing today, Jason if you had a cell phone that worked, I could have talked to you YESTERDAY!

Dan
Retics4me
06-14-2005, 01:00 PM
I used a 67 inch when I had a 6er . Just put a little ass behind it weakling !!
DNeinstadt
06-14-2005, 01:01 PM
Try telling that to Michelle who was trying to put the belt on while I hung off the tensioner!!

Dan
Dustin
06-14-2005, 05:52 PM
Dan, the 4lb pulley that im getting, is coming with a 68" belt. You may need a 69, or even a 69.5 belt for the 6lb.

~Dustin
DNeinstadt
06-14-2005, 08:35 PM
Nope, got it to work with the 68"! Just had to snap the tensioner a little bit! :)

BOOST!

Dan
Retics4me
06-14-2005, 09:06 PM
Sweet notice a bit of difference???
DNeinstadt
06-14-2005, 10:48 PM
Yeah, a little. Honestly, not as much as I was expecting. Time to set up a dyno to test the actual power. :)
Retics4me
06-15-2005, 05:18 AM
Yeah, a little. Honestly, not as much as I was expecting. Time to set up a dyno to test the actual power. :)


:crazy: :crazy: :crazy:
Kafn8td
06-15-2005, 05:52 AM
"too much power is almost enough", I have been afraid to say it, but I am thinking the same thing Dan. Yea it pulls hard, but I was expecting more. :googleeye oh well I can always put on the 2.76, and a lower and...
Supersonic
06-15-2005, 09:57 AM
Yeah, a little. Honestly, not as much as I was expecting. Time to set up a dyno to test the actual power. :)

Dan,

Do you have a custom tune on the truck yet?

When are you going to dyno? My header install is almost done, so I need to go back and dyno as well.
DNeinstadt
06-15-2005, 10:14 AM
Custom tune is from James at RWTD...

I'll try to schedule a dyno day soon then. :)

Week night work OK for you Jeff?
Supersonic
06-15-2005, 10:18 AM
I'll try to schedule a dyno day soon then. :)

Week night work OK for you Jeff?

Yep - week night is ok with me.
Dustin
06-15-2005, 09:34 PM
Jeff , Jason , and Dan.

Did you need some sort of tool to pull the factory pulley off ?? Or is it just bolted on with ( what I think ) 3 bolts ?

Just curious on how tuff this swap is going to be.

~Dustin
Retics4me
06-15-2005, 09:42 PM
Jeff , Jason , and Dan.

Did you need some sort of tool to pull the factory pulley off ?? Or is it just bolted on with ( what I think ) 3 bolts ?

Just curious on how tuff this swap is going to be.

~Dustin


If your buying it new it should come with the lock up tool and the 14mm allen socket that is needed. The stock on can be a pain in the ass but im sure youll be able to get it .
Dustin
06-22-2005, 09:07 PM
Hey, I was going through the instructions for the lower pulley install, and came up to a bold caption ...

A special program on your chip is required for the changes a pulley brings to your engine calibration. Severe engine damage could occur because of not installing a proper chip or having your current chip reprogrammed.

Should I really worry about this, or blow it off since I have a Diablo now ???

~Dustin
DNeinstadt
06-22-2005, 10:14 PM
Diablo has a tune built in for a 4lb lower. If you do not have the most recent version of your predator, I can help you install it!!!

Dan
Supersonic
06-23-2005, 09:33 AM
If your Predator doesn't have the latest software release, I would use caution with the built in 4# tune. Several people have blamed this tune for blowing their engine. The 4# tune that comes with the new software release is much safer.

Either way, I would get it on a dyno to check your Air/Fuel ratio.
Kafn8td
06-23-2005, 09:50 AM
D - I have the cable and power cord. We will download the latest revision and get it installed.