ThaddeusW

I remember reading about this on Macks Australian site. It has as cummins signature 620 in it. Another world record pull was done (forget when) with a 610HP E9 Tian. Once the MP10 comes out, its a wrap. MP10 Macks will out pull anything on the road. Too bad it not a 100% mack design though. LOL wonder how long it took for the spring brakes on all the trailers to come off . Imagine if the tanks on all the trailers were empty and how long it would take to charge em all . Aw I wouldent say that, it was a cancer fund raiser. Looks like tons of fun though

Welcome aboard Greg! You will find we are all quite friendly so you dont have to worry bout being a total n00b Go to this topic I started a while back. You might find the info you need there. As a quick note, someone said all the 4 valve heads had front mounted after coolers, the 2 valve had the side mounted after cooler. Might be wrong but read up anyways.

Thanks guys! I was looking at some air brake diagrams and at the function of the trailer valve on the bendix site. When you push the yellow knob in you not only supply air to the spring brakes but also send air to the control port on the trailer valve. Without the control signal the trailer valve pops out. The blue knob is downstream the park valve and trailer valve. It lets you park the tractor while keeping the control port on the trailer valve supplied allowing you to keep the trailer charged. Here is a little diagram I pulled from a bendix diagram. I labeld and colored the valves according to the dash knob color.

When you pull the yellow knob out does the red one automatically pop out?

Hey guys I cant seem to find out what the third blue knob on the dashboard does. Yellow is parking for the truck/tractor and red is trailer air supply. What does the blue one do?

I am always looking up stuff online! Knowledge is power!

On a international 4300 i drove at the international truck tour they had a 3 stage jake brake on the dt466. it was STRONG! On the 3rd setting and let off the gas it nearly threw me thourh the wind sheild! The system has a bleeder brake in combination with an exhaust brake. The cat powerd 7600 had a jake and it was very strong. I guess it depends. Must stop drinking.

I was reading the topic showdog started and looked over Macks current transmission lineup. Has anyone had any experience with the newer 8, 9 and 10 speeds? They look more for off highway/concrete pouring. Some seem very close to the older 10's and 12's where you split each gear. The TM309M Looks like it could give you 12 foward gears and 6 reverse gears. Why you can only split 1,2&3 is beyond me. I like the unusual shift patterns of them: TM308ML T310MLR TM309M

I just checked and the right url is http://www.quietride.com Looks good.

The snorkel on the Macks are about 10 feet off the ground. Here is a Titan diagram:

Just thought about it and figured out a formula thats more strait foward. ((e/(t*r))/m)*60 e = Engine RPM t = Transmission gear ratio (can be any gear so you can see speeds for each at specific RPM) r = Rear end ratio m = Revolutions needed for tire to travel one mile * mean multiply and / means divide in case anyone wanted to know. This formula determins the distance traveld in one minute, we multiply that by 60 to get MPH. MPH*1.6=KPH To get r use the tire rev formula: (5280*12)/(TireDiameter*3.14) Tire diameter has to be in inches to work in the above formula. Have fun

The snorkel is used to keep the air intake higher off the ground where dust and dirt get kicked up. They are installed on allot of trucks in Australia because the dry dusty dirt roads of the outback will make short work of an airfilter. Some people might install em for looks too. As for the sound deadening try these two sites: http://www.soundown.com/AI.htm http://www.b-quiet.com Dale has a B-67 with sound down and he says its very quiet in the cab.

Ok your tire does 420 revs per mile? You must have 12.00R24 tires then. At a .71 ratio in top gear you will have a 1500/(.71*5.02)=420.85 tire revs. So at (420.85/420)*60=60.12 MPH, then your set! Your 8LL must be a direct, 2100/5.02=418.32 which is almost 420. At 2100 rpm with a .71 over your going to be able to do about 84mph

More gears does not equal more speed. It all depends on top gear ratio if its a direct or over drive gear. If you know the diameter of your tires you can find the gear ratio you need by doing the following: Take the diameter of your tire (in inches) and plug it into the following equation (5280*12)/(tiredia*3.14) and that will give you the number of revolutions the tire needs to make each mile. So for lets say an 11r22.5 with a dia of about 42 inches we would do (5280*12)/(42*3.14)=480.2 revs per mile. So to go 60 miles per hour the tire has to turn 28,812 times. That works out nicely because we need the tire to spin at 480.2 RPM to go that fast. now with your engine turning at 1500rpm we divide 1500/480.2 which gives us an overall reduction of 3.12. Then divide 5.02 which is your rear ratio by 3.12 which is 1.6 and invert it (1.6^-1) which is .625 the over drive ratio you need in the tranny. Your drive shaft has to spin at 1500*.625=937.5 RPM So after that math lesson we now know that you need a tranny with at least a .62 overdrive gear with 11R22.5's. If you post your tire size I or someone else can help you. You can find your tire revs per mile buy either measuring it or going to trucktires.com and click search then look for your size tire for all its data. One more thing, keep in mind the fuller super 18's have a .73 overdrive max. Nothing higher that I can see. So at .73 you have 1500/(.73*5.02)=409.32 tire revs per minute.

Barry, I cant figure out how to post a picture from my gallery in a topic. Seems a little redundent to have to upload the picture again to show it in a post. Maybe I am missing something but I have been looking all around. Also is it possible to transfer an attachment file from a post to a gallery without uploading it again?

Remember they don't always become cops to protect us. They like their gun, badge and the power it gives them. Busting balls is what those types eat, sleep and breath. Good to hear you got through that ordeal. Dump cop saw an old looking truck and thought he hit the jackpot to meet his ticket quota. Little did he know the quality of a well kept .