I think that the 01 motors have to have more boost. I had my 99 and 01 intercoolers and lower intakes side by side. Just by looking at them you would think that the 01 will flow more. I would think with my set up...

01 motor..9#s?
4# lower..4#s
open air filter and chip..1#?
I would think 14#s? on my truck
I also got a chip with a cold weather and a warm weather program.

 

Richard,
Do you have a aftermarket boost gage i would bet your running at least 16#'s through it because my friend has the JL 3# pulley with other normal bolt ons and his boost guage is at 14 to 14.5 pounds of boost easy in good air!

Matt

 

fast forward, didn't know the lightnings had push rods? If so your the first one to throw them through the block. However, connecting rods have failed on a few trucks under extreme conditions. 12.1's on f'1s any chance you can scan that time slip and post it? not doubting just want to see and compare, if you can't post it i'm sure someone on here witnessed it , right?

 

Here is a couple of comments.

1. Rods can break with a properly tuned engine that doesn't ping.
2. I wouldn't go with anything more than 3#'s max for a daily driver. You can't tell how much your stock rods will take or for how long. My guess is between 10-20 thousand miles with 5-6 lbs of added boost.
3. Just because one is very meticulous about putting the truck back to stock doesn't mean that Ford will fix your engine. In fact lately if you do blow your engine you will most likely pay for it. An upper pulley is very easy to put back to stock with no markings left. Especially when you have a puller in your tool box.

 

Easter,

You can break a rod with stock boost as well, there are mechanical failures. I think most people blowing them up is due to pinging or improper tunning. Some have run their trucks after adding pulleys & not getting a reburn. Maybe is because certain tuners charging so much for reburns. Maybe some people dont know. I still feel improper use and maitenance are due to alot of the problems. Thats my thoughts. I was told once you remove the stock upper you cant reuse it. Thats Why I said that, if i am wrong im wrong....

 

Does anyone know or has anyone tried pulling the pistons from below without pulling the engine, is there room to pull the pan and crank from underneith the truck. Also does anyone know if these engines are balanced?

 

I personally feel that 8#'s of additional boost
(6# lower + 2# Upper) is pushing the limits of the factory rods let alone the Blower bearings! I am not 100% confident that just the 6# lower is not going to start causing problems.

My 2cents!

 

I know about 10 trucks running from 5 lower & 2 upper to 6 lower & 2 upper, 7 to 8lbs over stock. They have been fine for months with the proper TUNE. You wont have a issue if you keep your oil & plugs changed, listen for & let off when you ping. Dont set rev limits over 5500, dont try to make a good run after you spin bad. These are the true problems. Think about it......

 

Please correct me if I'm wrong, but a 2lb upper pulley is calibrated using a stock lower pulley. It makes additional boost as it spins faster raising the rpm of the blower.. Now add a 4-5-or 6lb lower and you now greatly increase the rpm, therefore I wouldn't think 6+2 would =8 given the fact that the lower pulley is spinning the upper much faster then it was originally designed or calibrated for.
just my .02 worth

 

Hello,

I have a single blade throttle body, Ram air, Cobra electric fan & cobra R water pump, unplugged boost bypass, upper ASP pulley 2lb( maybe good for .05 -1 Lb), 5 Lb lower, chip, ordered Long Tubes headers, Stock exhaust with Magnaflow muffler.

Just installed a Ford Boost gauge in my driver's side pod, I think it's accurate??? It says I'm running 14.5 - 15 lbs of boost at WOT from dead stop or when I WOT while cruising, and when I get close to 110 -120 mph I am reading a Total of 15.5 Lbs.

I used the digital tach that is part of the diagnostics section of my trip/odometer to get my readings, When my chip shifts at 5450 rpm, it seems to spike quickly to 5,600 to 5,700 then goes back down quickly. Do you remember what your chip shifts at 5,600 -5,700 rpm? Maybe yours drifts to 5,900 to 6,000. 6,000 is supposed to be dangerous for our trucks and with the boost bypass, maybe some pinging going on, so maybe you had several things at one time happen to cause the engine failure?


Master of Pain has a good point, Do you think bypassing the Boost Bypass valve caused the engine to build up way to much boost pressure to cause a failure also? What plugs were you running, I heard the NGK TR5 are lean running plugs??

With several blown engines by a lot of us L owners, I am not a engine guru at all, I figured by now that someone (an engine guru on this board) would (give)have some better answers on max boost, rpm's, what combo's we can run on the edge in our trucks without having engine problems. We never seem to hear why and what caused it to happen, just what happened when it did blow.

Not trying to pick on JDM, Only tuner I know to have blown an engine was JDM, we know what happened, but not really why it happened, or did I miss something somewhere? The other tuners haven't had a blown engine and they run their trucks to the max, maybe the L owner/chip's fault????Fast Forward, Did you hear any pinging before the motor let loose?

What's up??? OK, Big guys, what's the rest of the story Spike Engineering, Ruslow, 1BADTK, NeedFourSpeed, etc.?? Maybe some of you big guys know some secrets your not telling us, Give us the low down...Don't be scared..j/k

thanks,
My 03 cents..

 

Very well said DL, I see the point to it!!!

 

Hmmm, I remember someone telling me he was getting 11.5lbs with just the upper pulley. Now he's only getting "3.5 - 4lbs" from a 5lb pulley?? DL, don't try to bullsheit a bullsheiter.
LOL

BTW, I should be dynoing next weekend. Hopefully I can pull some REALLY good numbers.

 

Corner,

You picking on my buddy DL?? LOL ,I am going to make a race with you guys next year. DL has talked about you, I wana meet you as well. Let us know the Dyno #'s!!!

 

TZ hit on a very good point. The "pound" rating of the pulley goes out the window when both are changed. It's all about ratios. Do the math using the diameter of each pulley to calculate the blower rpm. Just like sprokets on a bike.

It is possible to change the pistons and rods with the motor still in the truck. What you won't be able to do is convert the head bolts to studs while still in the truck.

 

Hey CornerCarver:

Honestly this is what my Boost gauge reads. We can get together for a test ride and you can see for yourself.

The 5 lb pulley is giving me 4-4.5 lbs on my truck according to my new Ford racing boost gauge.

I have the stock lower pulley on and ASP upper pulley and running 11-11.5 with my mod's.

I can't wait to see your Dyno numbers. I hope you have some good numbers.