Some time ago, evryone was concerned with overspinning the Eaton with just a 2# pulley. Then JL came out with the 3# (wich I have and love, btw), and now some people are running 5 pounders with an upper

Has someone determined, through testing or mileage or whatever, that the Eaton can handle this? I'm very close to ordering a 5# from JL, but don't want to be picking pieces of my Eaton off of the street in a few monthes. How many miles of driving/racing do y'all have with these high boost set ups?

-Thanks
Spencer

 

Seeing as how the 2lber's came out a few months ago, coupled with the 2lb uppers, that doesn't really leave alot of time to REALLY test these things does it? Now lowers are coming out bigger than both original ones combined and peope are puttiing uppers on with those! Some on here have "bigger ones" than I have to be messing with a $5000 engine.

 

I think we are seeing the problem associated with the bigger pulleys or boost.There are posts on here with the teflon coming off the rotors and I feel that it is related to the more boost levels people are wanting,also could be because of the thermal shock of the N20 that is being put on top of the blower.Think of it as a hot lite bulb and cold water.Stan IMHO.

 

I am sticking with the 3# lower. That is enough for me.
Jeff

 

Everyone has differant comfort levels. Some people are content with 13's other's need 11's on their street driven L. Time will tell how the Eatons hold up to 15/16K rpm. So far has anyone heard of a blower gernading? I have not.. In fact I have been told that our blowers will take what you throw at them....now heat that's another thread...

 

I was going to put a 4lb lower on and and upper but I have heard a few people talk and I think just a 5lb lower pulley will be enough for me . Could Anyone Guess and tell me around what a 2001 with a Diablo Chip, JL Air Intake Kit (the Cheapest One), and A 5lb lower pulley Would Run in the 1/4 and est. Hp
Thankyou

 

Hey CornerCarver,

You want to buy my 4 lb pulley, 5 lb's is sounding awful temtping..

Don C has 25,000 miles with a upper and lower pulley, no problem, yet??

We've heard of motors blowing, maybe one from to much boost, (JDM said)??? Other motors blew because of lean chip, pinging???WOT with a chip @ +150 mph for a sustained time???I haven't heard of many motors blowing because of too much boost???

 

too must boost can cause a lean condition unless you add more fuel to the mixture. if you have a chip for a 2lb lower pulley and then you add a 2lb upper and swap out the lower with a 5lb lower you better get that chip recalibrated or you could be in big trouble. Its just like nitrous in a sense.

we could proabably spin the blowers even faster then that but the heat build up is a concern then. I plan on runnig a 2lb upper and 6lb lower at the track, but I also have a 6 gallon intercooler resivoir and I will spray a 50 shot to cool things down more.

 

Don Corleone can correct me if I'm wrong, but I think he's only had his upper pulley on for a few weeks...which is not nearly long enough to consider "adequate" testing (imo).

Disclaimer: Not that I have any "experience" with this, but I think ~3 or 4 lbs of extra boost (whether from both pulleys, or just a lower) is the M-O-S-T that I would feel "comfortable" pushing my blower at...think about how fast (and L O U D) its working now. But again, thats just my opinion (coming from a 40,000 mile/year L driver).

Later...

GK

 

Hey RTKILLA:

You're right, I wasn't trying to bad mouth the chip, just some people have blown there engine and scarred their cylinder walls because they probably stayed in it at WOT and didn't hear the pinging or know what it was...

If you are considering any MOD, please consult your tuner to ensure your chip is tuned for your mod's

Hey MXRacer, I know Don C just installed his upper pulley, but he said on SVTperformance that he has NOT had any problems with the mod's he installed and he has 25,000 miles on his truck.


JL ran his 99L hard and drove it to all the events, had probably 35-40K when he sold it. NO problems with his, didn't miss an event...

 

DL,

My tires couldn't take ANOTHER 2lbs! 3lbs is more than they can handle now! Thought you were thinking about going back to a 3lb? Need more boost now huh? Them 20's must be CHEAP! LOL

 

Hey CornerCarver,

I know, the 3 lb seemed to hook up great with the 40 series 20's, when I went to the 4lb, the traction problems started with the 20's. But I like it, LOL

I was going to maybe go with 4.10 gears to try and get me back to a 3.73 gear ratio with the 45 series 20's I'm putting on my truck. Maybe change to the 5lb pulley and try my best NOT to install a upper.

A 5 lb lower, 4.10's, 20's, I think I'll be satisfied for a while.

When I go to the track, I'm going to swap to the 18's most of the time, no since letting the F1's sit in the garage.

 

I ran the 1.5 upper and 4lb lower for quite a while(spring and summer) and tons of 1/4 mile runs. I then replaced the 4lb with a 5lb and used it the last part of summer and fall. I had my intercooler replaced a couple weeks ago and the tech said everything looks normal, even the rotors. I think it's normal for the rotors to have some wear even if you spin them at the "normal" speed. By the way, what is the normal speed? If the Lightning's came out with the New Harley Trucks pulley, we would be scared to go with the Lightning size upper. We only spin the blowers at a real high speed for a short amount of time and we cut back the shift points some. I'm not sure what the extent will be, but I haven't heard anyone "grenade" a blower yet.

 

I think any of the folks selling the pulleys will say to get whatever poundage you feel comfortable with, just be intelligent about it when getting the chip burned.

The 2# pulleys have been out well over a year, with no noticeable issues with a proper tuning. The higher numbers have only been out for several months (to the public anyway), so I guess time and mileage will tell what effects they will have.

I personally have one of my chips set up to shift when the blower hits 15000 rpm, at 5400rpm on the motor (3# pulley). I'm sure I could get a bit more power by shifting higher, but I'm not comfortable with that, yet.

 

Spencer,I've ridden with you.I don't think a pulley is going to be your trouble.