Ariel.Club Forum

WHUF??!



[size=500][b]T-U-R-B-O[/b][/size]

This is useful for belt/pulley calculations.

You will need to click on the file paper clip, open or save the image, then zoom in to see the formula.

wow thanks!

[quote="silver"]
hey O4redline, quick question for you.

The math used to calculate the RPM's of the supercharger uses the length of the belt right or at least the crank pulley diameter....since ours do not have any accessory pulleys such as air conditioner pulley would it change the math?

Just curious, if you would calculate the eaton's rpm the same for both vehicles
[/quote]

It should just be the ratio of the circumferences unless the belt slips.  Since circumference is diameter times Pi, Pi cancels and it becomes the ratio of the diameters.

RPM blower = RPM crank X (Diameter crank pully X Pi) / (Diameter blower pulley X Pi)

RPM blower = RPM crank X Diameter crank pully / Diameter blower pulley

RPM blower = 7200 RPM X 6" / 2.7" = 16000 RPM

That's assuming that the pulleys are exactly 6" and 2.7".  I have no idea what the actual measurements are.

hey O4redline, quick question for you.

The math used to calculate the RPM's of the supercharger uses the length of the belt right or at least the crank pulley diameter....since ours do not have any accessory pulleys such as air conditioner pulley would it change the math?

Just curious, if you would calculate the eaton's rpm the same for both vehicles

[img]http://i134.photobucket.com/albums/q115/Shaunmcdee/peltierdevisedcooler.jpg[/img]

[quote="bolus"]
do I see JBP stamps on there?  Must be expeeeeensive.  :)  looks freaking cool though
[/quote]

Agreed. Would you call that a Core Duo Quad or an Intel Octo?

Maybe for your car your iats are that high. For ours (remeber Im a redline, but well aware of what forum im on.) a 2.6 still doesnt net us past 165 IAT2 on a stock cooling system.  For these motors anything over Iats of 160 is considered potenially engine killing.  And technically its true about over spinning, This is the info i got from the Redlineforums.com

To my understanding, EATON said that our blower peaks out at 19000rpms(spinning any faster is unsafe for the blower), but it starts to loose efficiancy somewhere around 17000. he did some calculations for me, and said that with our 6" crank pully, and a 2.7" sc pully, at 7200rpms(my limit), the blower is spinning above 17000rpms already (cant remember the exact number but it was 17xxx).

If your still unsure, i can find you the basic math charts to do the conversion yourself. In my case, my blower falls out of effiecency range very early in the power band. To fight this. i use methanol injection. Although running the 2.6 pulley also makes me overspin my blower after 6216 rpms. There is nothing i can do to fight this. Monthly i religously open my blower, check the shaft and gears, the coupler, the needle bearings, and repack them with grease, and add new oil. This is the reason why my blower has been able to stay alive for so long,without needing a blower rebuild.


LOL @ heatsink comment.
Dual pass cooling cores, 8 high density peltier devices, 8 heat sinks coupled with fans = One bad ass system, about the same size as your stock setup, only thicker. Looks like a good idea to me. :tu: Anyone feel like fabricating?  ;D

I'm not sure how you can say that the blower on the ecotec isn't being overspun until 6k/2.6" pulley with AIT2 temps over 180+ degrees.  When a supercharger starts heating air to the point that its almost hot enough to boil water, its not doing something right.

Computer heatsinks to cool a car?  This I gotta see  :pop:

do I see JBP stamps on there?  Must be expeeeeensive.  :)  looks freaking cool though

[quote="DarthChicken"]
Bolus and I already went down the peltier route...  there's no way you could use one, its just not efficient enough.  The calucations said something huge would be needed.

My tune - timing on the stock ecu is VERY conservative.  I'm running exactly what you are saying now - 11.8 to 12 with water injection.  I won't use methanol, because I've seen too many clogged nozzles/crapped out pumps/faulty wiring end up destroying an engine from detonation (none of my engines btw... I just won't rely on the technology, where its currently at).  I'm using water only, and only to cool the intake charge (which I've found to be VERY effective).

I hit 260whp very easily when I started tuning... but that was without doing ANYTHING with the fueling past 5500rpm.  I've since added some fuel (it was running close to 12.5) and added in some timing.  I'm guessing 275whp or so with the stock 2.9" pulley.  But we'll never know, because I moved to a 2.8" pulley, which is as small as I'll go, on an eaton that will be run hard at the track.  My goal is 290whp or so with that setup, and having it hold together.

Midrange I saw huge improvements, along the lines of 20ft lbs.  I also smoothed the tune quite a bit, there were places the car was actually losing power through the rpm range and then coming back. 

And then... I have 10.5:1 compression pistons sitting in the garage, ready to go in.  With those, I can lower the boost down a bit so I'm not overspinning the sh1t out of the supercharger, lowering the IAT2, and get the same power.  Or... maybe I'll just leave the 2.8" on and get to 300+whp  ;D

Here's my last dyno... again.. .this is without any fuel tuning above 5500rpm, and you can see how the torque dropped off as a result when I had to cut back on my timing as a result.

[img width=800 height=600]http://i255.photobucket.com/albums/hh128/darthchicken_2000/atomwithHPtuners.jpg?t=1207015018[/img]
[/quote]


I dont know what experimenting you may have done with peltier units. But this:

[img]http://i134.photobucket.com/albums/q115/Shaunmcdee/peltierdevisedcooler.jpg[/img]

Makes me a firm believer it can be done. This heat exchanger is cooling a soon to be 700 plus horsepower ecotec.

Also for our cars you dont start over spinning the blower until u hit the 2.6 pulley and anything over 6k rpms.
And if your talking about lowering boost to stop overspinning, do u mean dropping pulley sizes? or just controlling boost via your tuning software?

[quote="bolus"]
190F on the track for me.  What is that?  10 degrees on timing?
[/quote]

I don't know, my program only gives me access to IAT temp/timing reduction which is moot because I've only logged ambient air temps for IAT. I'll defer to the HP folks to post up the IAT2 retard table.

I'm not seeing that much of either.. but I couldn't log IAT2's until just after I put my bigger surge tank and pump flow reroute so I'm not sure which did which and temps were only intermittent while in boost and would quickly cool down.

[quote="rfmarz"]
I imagine it'll ba at least a couple of hundred dollars. :laugh:
[/quote]

maybe ;D or maybe a couple of million....or maybe a couple of thousand...either way it's definitley a couple of something ;)

I imagine it'll be at least a couple of hundred dollars. :laugh:

oh sorry.....no I do not know how much it will cost.  I think he's working on a group by scenario to debut the product.

[quote="rfmarz"]
Your new exhaust looks and sounds awesome. Any idea, yet, as to the cost?
[/quote]


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