Has anyone tried the 2.4" pulley? I know a J-BOM member has it, but his car is having problems so it's not on the road. I have the 2.5" pulley now and I am only seeing 7-8 psi and would like to see 10 like you other guys have.
doesnt the 2.5 require the snout to be ground away for clearence ??
Yes it does and if you use a little belt dressing for racing, you will see higher boost levels. The only problem is, it is very messy.
I swear, as loud as you are, you should be doing at least 200 mph.
Rob Weis (RobsCavZ24) wrote:Has anyone tried the 2.4" pulley? I know a J-BOM member has it, but his car is having problems so it's not on the road. I have the 2.5" pulley now and I am only seeing 7-8 psi and would like to see 10 like you other guys have.
if you tell me your not running any kind of alcohol, water or what ever injection i hope your engine blows.... sorry to be so mean but its true.... thats the most you will see untill you cool it down... i see 10psi on the 2.6" pulley and havent even used my 2.5"..... a 2.4" would never work as for one with the 2.5" your spining the supercharger faster then what is recomended and i dont think you can get past 12psi with it....
The First Twin Charged jbody
blue car (R.I.P) - 240whp @7psi..
silver car - 305whp 315lbs.tq @15psi (91 Octane) or 420whp & 425lbs.TQ @20psi (94 octane+Alcohol Injection)
All dynos run on a Mustang dyno
A 2.5 pulley is spinning the rotors @ 16,000 rpm @ 6200 rpm on the motor. That is MAX. according to Eaton.
With a 2.80 pulley your spinning @ 14,293 which is as high as their efficiency charts go.
6.455 (crank pulley dia.) divided by 2.80 (S/C pulley dia.) X Engine RPM = blower RPM
"The FACTS are always subject to CHANGE once the TRUTH is applied"
"In the entire history of man the only stupid questions are the ones that don't get asked"
Yes I am using alky. I have the 2.6" pully and barely saw 7. It may be the weather down
here in the south. But I would not recommend the 2.4"
I swear, as loud as you are, you should be doing at least 200 mph.
I have an alcohol injection kit, I just haven't installed it yet. I guess when his motor is running he will be able to tell us if it works for him or not.
Be carful with the alky, I have already shorted tps's. The alky will collect on the tb blade and drip into the sensor. If you run it, after a pass, idle the engin up to make sure the alky is gone
I swear, as loud as you are, you should be doing at least 200 mph.
Quote:
i cant believe that kid just said he hopes ur engine blows..
i completly agree, and i dunno, he has been asking a lot of boost questions that were answered, kind of a sh!tty attitude to bring into a place that has helped you so much
just me though
as for the pulley Q, i have no idea
but it does suck that this 2500 dollar investment is so limited, but i guess the reliability makes up for it
hey i didnt mean it in a bad way... i just would hate to see him use it with out any cooling and BOOM! i dont mean it to put him down...
The First Twin Charged jbody
blue car (R.I.P) - 240whp @7psi..
silver car - 305whp 315lbs.tq @15psi (91 Octane) or 420whp & 425lbs.TQ @20psi (94 octane+Alcohol Injection)
All dynos run on a Mustang dyno
Temps in michigan right now are roughly around 40-45 degrees. Running without alcohol is just fine due to the fact that it's not blistering hot out or even warm for that matter.
Rob, I didn't get the 2.4" pulley for the supercharger because of what John said...the 2.5" is maxing out the rpms of the supercharger itself. That's not your problem. The supercharger saw 10psi on my car with the 2.5" pulley.
I'm wondering if you have an internal engine problem like an open intake valve. Not a pretty sight but I wouldn't rule it out yet. Another problem could be that maybe we squished one of the rubber intake gaskets wrong between the supercharger and the head; causing a boost leak.
For you guys that are experiencing alcohol leaking into your TPS, do yourself a favor and have the bearing resealed that separates the TB from the TPS. Another option (which is something I designed into the alky kit that Rob has) is to keep the atomization of alcohol on a narrow path until after the throttle body. That way, barely any alcohol even goes near the TB seal.
<a href="http://www.j-body.org/members/mrpute"><img src="http://www.j-bom.com/images/sigs/putesig.jpg">
im seeing 6psi on stock pulley....
, i wanna upgrade the pulley and boost but i dont know how to calculate what size pulley i want for 10psi cause im already seeing about 1.5psi more than i should on the stock one...hmmmm
Mr. Pute wrote:
For you guys that are experiencing alcohol leaking into your TPS, do yourself a favor and have the bearing resealed that separates the TB from the TPS. Another option (which is something I designed into the alky kit that Rob has) is to keep the atomization of alcohol on a narrow path until after the throttle body. That way, barely any alcohol even goes near the TB seal.
Mr.Pute.. can u care to further explain what u did to have an "atomization of alcohol on a narrow path until after the throttle body. That way, barely any alcohol even goes near the TB seal."
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
i really need to check the size of the pulley on my proto type s/c , i see 5-7 regular bassis , and when the weather is cool ill see 7-9 about from 5000 to redline , the cooler it is the closer to 9 i see
and now that i got the alky kit hooked up , i saw steady 8-9 psi last night , and my s/c temp never went above 120 , and the case was cool to the touch , and that was after several passes last night
What kit did you go with Eric?
C24s/c wrote:Mr.Pute.. can u care to further explain what u did to have an "atomization of alcohol on a narrow path until after the throttle body. That way, barely any alcohol even goes near the TB seal."
Nate
No prob. Here's a pretty (or not so pretty) drawing:
Remeber, this is a really crude drawing. The only thing I'm trying to do is explain a concept. I believe (keyword, I BELIEVE) systems built by coolingmist and alkycontrol and the list have a omnidirectional nozzle (or rather a directional nozzle with too wide of a spray pattern) that shoots the alcohol everywhere. The concept they use is that it's best to atomize everything immediately to maximize cooling potential and to prevent compressible damage by making the water disperse to as small as possible. Both of these are very valid excuses for using a wide spray pattern. However, by doing this, you are having the water hit everything before you enter the throttle body, hence one reason why people are seeing buildup of water in their TPS. The system I designed used a fuel injector that has a narrow spray pattern (to involk direction), but atomizes just as much as the nozzles do. However, there's a catch. Using a fuel injector allows the atomization to occur about 5-6 inches away from the injector itself. Therefore, you can shoot the alcohol into the throttle body past the butterfly axle to reduce the buildup of liquid before the TB. Pretty simple. Yes, the injector mount I fabbed up points the injector toward one wall more than the other. This is done to go around the butterfly axle so that you don't hit it with liquid.
Hope this helps.
<a href="http://www.j-body.org/members/mrpute"><img src="http://www.j-bom.com/images/sigs/putesig.jpg">
my alky kit i pieced together , i got alot of parts new and free from a friend
once i figure out my pulley size , and the type of pulley , and my injector upgrade should be next week , im off to smaller pulley and more boost
and see how a 100,000 + mile motor and trans will last , muhahahahhaha
Mr Pute, what belt are you running with the 2.5" pully?
I swear, as loud as you are, you should be doing at least 200 mph.
ive got my nozzle , in the exit of the 90 degree bend
the nozzle is on a 90 facing the TB , and it kinda points slightly up towards the middle of the opening
the nozzle is maybe 5-6" away from the tb
I posted earlier about this. What belt are you guys running with 2.5" pulley? The 4050722# is no longer valid
I swear, as loud as you are, you should be doing at least 200 mph.
02z24sc wrote:I posted earlier about this. What belt are you guys running with 2.5" pulley? The 4050722# is no longer valid
That's the number I used. It's the 72" belt for the Saturn 1.8L engine.
Position is only half of the problem for the nozzle. The main problem is whether or not it's spraying everywhere or if it's a controlled spray that fans out.
<a href="http://www.j-body.org/members/mrpute"><img src="http://www.j-bom.com/images/sigs/putesig.jpg">
Mr Pute, they no longer carry that belt. I am wondering if the stock belt would work or if will slip.
I swear, as loud as you are, you should be doing at least 200 mph.
02z24sc wrote:Mr Pute, they no longer carry that belt. I am wondering if the stock belt would work or if will slip.
Bullcrap. There's no way they'd stop making that belt. Too many of those engines on the road. Go elsewhere and see if another company can order them.
<a href="http://www.j-body.org/members/mrpute"><img src="http://www.j-bom.com/images/sigs/putesig.jpg">
I even checked with the local Goodyear store and the # they show is 4050755. The 4050722 doesn't exist in there system either. Autozone and Goodyear are the only ones in my area that carry Gatorbacks.
I swear, as loud as you are, you should be doing at least 200 mph.
