2nd Gen 5.0 v-8 underdrive pulley discussion thread

[jah81592]

I personally don't see where there will be a charging or cooling problem. I live in Alabama and A/C is almost mandatory. I also tow a boat and no probs yet. I am not even overdriving the alternator. Just the crank pulley-james

 

[Jakee]

I have the Underdrive crank pulley and the underdrive water pump pulley. I have NO problems.

I know this is not a debate thread but I have to put my 2 cents in; if you don't mind.

The 4.0 SOHC water pump pulley actually slows the water pump down even more! I'm not sure where everyone is getting that it speeds it back up cuss it doesn't. The only 4.0 SOHC pulley that speeds something back up is the ALT pulley.

So with the underdrive Crank pulley (Smaller than stock), and the underdrive water pump pulley (Bigger than stock, REMEMBER, IT'S ON THE ACCESSORY NOW!!!), you're getting even less drag!

If you want to put extra HP (no, you're not increasing HP you're transferring what you have to the wheels instead of the accessories) to the ground then look into this. It's one of the best mods I did to my 4.0 and I think others will tell you the same.

And about the weight issue. I really don't think weight has much to do with this (As far as gains are concerned). I may be wrong but I think the crank pulley has to weigh almost the same in order work correctly.

The price: remember, I don't think this is going to be just a pulley, but a pulley and a harmonic balancer. It's going to take more machine time to make this than some of the other "just pulleys". A machine requires electricity to run$$$$ as well as a highly skilled operator$$$ (Unless you want to buy from a foreign country) as well as materials$$$ as well as overhead (Paperwork, the bosses salary!) Good ole' quality parts made in the US are going to cost you a little. HP costs. Divide the total price by around 10-15 and you get the price per pony cuss I bet you'll see that gain. Take other mods and do the same. Then make your decision.

I see a couple of guys here trying to help bring something to life. Will it happen?


Okay, sorry...had to say it.

 

[jah81592]

I have the Underdrive crank pulley and the underdrive water pump pulley. I have NO problems.

I know this is not a debate thread but I have to put my 2 cents in; if you don't mind.

The 4.0 SOHC water pump pulley actually slows the water pump down even more! I'm not sure where everyone is getting that it speeds it back up cuss it doesn't. The only 4.0 SOHC pulley that speeds something back up is the ALT pulley.

So with the underdrive Crank pulley (Smaller than stock), and the underdrive water pump pulley (Bigger than stock, REMEMBER, IT'S ON THE ACCESSORY NOW!!!), you're getting even less drag!

If you want to put extra HP (no, you're not increasing HP you're transferring what you have to the wheels instead of the accessories) to the ground then look into this. It's one of the best mods I did to my 4.0 and I think others will tell you the same.

And about the weight issue. I really don't think weight has much to do with this (As far as gains are concerned). I may be wrong but I think the crank pulley has to weigh almost the same in order work correctly.

The price: remember, I don't think this is going to be just a pulley, but a pulley and a harmonic balancer. It's going to take more machine time to make this than some of the other "just pulleys". A machine requires electricity to run$$$$ as well as a highly skilled operator$$$ (Unless you want to buy from a foreign country) as well as materials$$$ as well as overhead (Paperwork, the bosses salary!) Good ole' quality parts made in the US are going to cost you a little. HP costs. Divide the total price by around 10-15 and you get the price per pony cuss I bet you'll see that gain. Take other mods and do the same. Then make your decision.

I see a couple of guys here trying to help bring something to life. Will it happen?


Okay, sorry...had to say it.

Jake, This is an incredible write up! I couldn't have said it better myself. Dollar for dollar I will say that this is one of the top bolt on's I have done. As far as the price, really good considering people are willing to install CAI kits, and exhaust! This mod will yield more HP for roughly less $$$$. I don't have a problem with paying a little more for American products. Too much of our purchases support foreign countries. So I try to support ours at all cost(within reason). ASP, C&L, MAC are the manufacturers that I support which pride themselves in US manufacturing.SCT software engineering is here, not sure who(where) makes the ExCal2! There aren't any other languages on the ExCal or other languages in the instructions so I will assume production is here. This is the reason I was so anxious in being dealers for these incredible suppliers.

 

[Iron-Mike]

Well I've been looking for this mod for a few months so if it ever does become a reality I will DEFINITELY buy. Add my name to the list or whatever it is you guys have to do but I want one if it gets produced.

I have a 2000 Limited 5.0 AWD V8 by the way

 

[Turdle]

 

[TerryS1980]

I am definately interested in the underdrive pulley set. I have a 2000 5.0. What is the stock alternator pulley size? I am not going to be home for a couple weeks and can't measure it.

 

[version4pointOH]

from my experience underdrive pullies are worth the money. i have a set of UPR underdrives on my stang and i felt a little gain by the seat of my pants. but it seems like the motor revs a little quicker too.

 

[Premierexplorer]

I have been thinking of making an aluminum crank pulley that will be the stock size. I would buy 6'' aluminum rod and will have a CNC lathe, machine a pulley. the rod can be purchased from http://www.mcmaster.com/ part number 1610T44. the rate for the lathe is 75 dollars an hour. Right now im trying to find out how many hours it would take

 

[chriswells78]

I have been thinking of making an aluminum crank pulley that will be the stock size. I would buy 6'' aluminum rod and will have a CNC lathe, machine a pulley. the rod can be purchased from http://www.mcmaster.com/ part number 1610T44. the rate for the lathe is 75 dollars an hour. Right now im trying to find out how many hours it would take

Is that $75 for just the time the metal is in the machine or do you have to pay for the time it takes the draftsman draws the part, the programmer programs the machine and the metal is in the machine?

 

[CDW6212R]

I suggest that you first look at a stock Explorer 302 balancer. The balancer is one piece, the pulley and crank trigger is all part of it. Nothing is separate or unbolts.

 

[Premierexplorer]

The $75 is would be the aluminum in the machine per hour. I did notice it was one piece. I think it would be easier to make it out of aluminum rod rather than trying to find a place to make a casting. I have a machine shop that will contact me with the price and number of hours it would take.

 

[reserved50]

the crank pulley is one piece with the balancer?If so why not have the 5.0 Mustang balancer used with a crank pulley setup similar to the 94/95 Mustang ( have the crank pulleys interchange)with a spot to bolt the timing gear on the back, will give you more options, if so Im in

 

[BLKDIMND]

That sounds right

 

[CDW6212R]

The Explorer balancer is located inboard to the block more than the other Ford balancers. So part of the Explorer balancer would have to be machined off to change the pulley. The Mustang balancer pulleys don't line up with an Explorer front dress. There are so many differences, that an aftermarket part would be best. They don't see a market, I have asked a couple of them. I'm still looking for an option, I need a 28oz. Explorer balancer also. Regards,

 

[reserved50]

I meant having the same face on the balancer so the sn95 (same as fox chassis I think etc) style crank pulleys can be a direct bolt on, if anyone wanted to space them out for other reasons it wouldnt be a huge project.

 

[CDW6212R]

I agree that the best answer may end up being to modify the stock balancer.

 

[Premierexplorer]

I talked with a machine shop today. It would take 12 to 16 hours to use a lathe to make an aluminum pulley. The amount of time depends on the how hard the aluminum is. So the lowest cost would be $900 which is way too expensive. I will have to check into other options. Maybe make one myself http://www.backyardmetalcasting.com/index.html :scratch:

 

[CDW6212R]

If the OEM balancer can be modified, the best answer would be to cut it down to allow an existing pulley to bolt to it.

The real tough part is to be able to change the balance of it. For 302's it works fine, but any stroker engine needs a 28oz. balancer, not the 50oz. weight of the Explorer part.

 

[jah81592]

The main problem is that the crank pulley has an exciter ring for timing on it. From what I have been informed this is where most of the time will be in the machining. Unfortunately my source still hasn't seen the demand they need to produce this product. I will contact them again.

 

[reserved50]

Im sure a competent machine shop can get rid of the old pulley and machine up a hub/adapter on the stock 5.0 balancer.