I want a lower...what do i need?

[Black03COBRA]

I think my next mod i want to do is a lower pulley swap.

i currently have a 2.77 upper and the billtet flow idler set up.

i want to run the 4 pound lower with this upper? is that possible or do i need a bigger upper?

also i was wondering if im going to need to change the alternator pulley?

or is there another way to do this?

thanks

black0three

 

[Silver 03 Cobra]

Order a Metco 4 pound lower from JDM. I just installed mine Thursday. You would be better off with a 2.93 pulley on top to reduce belt slippage. I went ahead and pulley my 2.80 and installed my 2.93. With the 2.80 upper I was hitting 17 psi and then dropping back to 15. I now hold 15-16 psi through to nearly redline before it drops slightly.

My buddy runs a six pound lower and a six pound upper and he has the stock alternator pulley. I'm sure it may wear out the alternator prematurely. I'm not too concerned about it right now.

 

[Black03COBRA]

thanks a lot man..

i think im going to order the interchangeable set so i can swap in the 4 or 6 lb lower.

remember when u swapped out the stock pulley with a smaller upper and felt that sudden rush of power increase fromt stock? do u get that again with a lower compared to having a upper as well?

thanks again....

PS- is it easily installed? or shoud i say as easy as an upper or easier or harder? never did a lwoer b4

 

[Dana]

See the modifications section for a review of the lower install.

Dana

 

[sambandit]

There was no where near that same sotp feel. Although my tune isn't quite right yet so that'll help when thats dialed in. To be honest, I probably wouldn't do the lower again. This frickin Mustang shop in town did it for me and charged me 4 hrs!!! So with the part and labor it was 800 bucks. I may change my mind when the tune gets dialed in, but right now I'd say it's a waste of money!

 

[Silver 03 Cobra]

I disagree with the SOTP's unless you put a lot of mods on with the first pulley. I picked up 50 rwt so that's quite a bit at the crank. I gained a considerable more yeehaw factor at least for awhile.

Sambandit, I've done two lowers. The first one took about 5 hours on my buddies 03. That was in about 30 degree weather with snow coming down. JLP told Mark it would only take one hour. I knew when I opened the box that was BS. My fingers were dead when I got through. I bet JLP would have charged Mark four hours if they did the install. I bought mine from JDM and one of the pictures was missing. It was the one showing the new parts for the lower. It slowed me a little but I was lucky enough to have done one install already. I did it in under three hours. It's not as easy as some say it is especially laying on your back.

 

[2F2F]

> sambandit: ...Mustang shop in town did it for me and charged me...800 bucks.

And therein lies the source of discontent...
You should have rounded up a couple of local '03 boys and installed it yourself =>)
Would have been that that much more gratifying...