Mack Doctor Jr.

Im so jealous of u Greg... Ive been trying to buy a nice all original like u got, but the bank wont loan me the money cause they dont think its worth what the guys wants.... o well

U got a nice truck there. I let u guys know when im back out that way. I will buy u that cup of coffee for sure, but then again i dont want eveybody seeing me drive this Maroon Vulva (Volvo).. Later ~Joe

What rears do they have? Anything rebuilt?

Nope. Trent I was hauling seed corn out that way and picking up a back haul in Howard, PA. Im back home now. Probably headed that way again next week.

Well i'm off to PA in the a.m., so u guys get those awesome dogs out on the road for me to see... I hope to at least get passed by an E9 while im out there..... Later ~Joe

Im not saying what I did makes sense for sure. I just know what I did and it fixed it. The truck had the pump with the res. mounted to it. ( u know the style clear back by the fire wall where u couldnt even add oil to). I put the same style (used) back on it and it did the same thing. So we broke down and put a Vickers pump on with a frame mounted res. and it fixed the problem. I dont know why but it did the trick.

Maybe u can put a flow meter in line to check things out?

power steering pump may be bad. I had the same problem on an R model. It would only get bad if i crossed a set of RR tracks kinda fast.

It ended up being the pump.

Some of the old style power steering pumps had internal filters on them, u may need to check that out. Im not sure how new your truck is or if it is the same style im thinking of.

I hate Glatz Truck Sales in Decatur. I tried to see what a truck is worth to purchase, and all he wanted to do is sell me a new POS. I dont want new junk that has to go to the dealer to get worked on!

He tried to feed me some CSA crap about old trucks are a dying breed and the gov. wants them off the road for safety purposes. Im not buying it! Then he turned around and wants to look at it to see its worth. I know what that was, he was gonna buy it out from under me to resell for twice the money....

What is this world coming to?

I'm just looking for opinions here.... What would u guys put on a superliner with an E9 for straight pipes? 6, 7, Or 8's? They can only be 8 ft long though. Any advice is appreciated. Mufflers just wont due!

A friend of mine was telling me about JR's trucks. He gets 5 to 5.5.... If u keep the boost under 20 u will get 8 mpg..

Francise Engineering's tech # is 800-641-7920. He is in Painesville Ohio.

I've also been torn what to put in them. My dad says 15/40 for the main reason is if the pump seal goes out all ur doing is putting the same type of oil in the engine that is already there.

Jr himself has a couple of his own road trucks with 1,000 hp that go down the road every day. The stock heads will not hold up to that type of hp on a daily basis. The only way is to do what he did. And that is to buy heads from Dale Francise. He has 3 different types, stock heads ( which have the valve seats pressed in to 10,000 psi.) ( stock from Mack is only 5,000 psi which is why they cant handle that much hp) Dales 2nd set is a hot stock ( a little porting and bigger springs), his third is full on high performance turning up to 5500 rpm.

So back to the topic is u need heads first thats 5 grand or so, an inline fuel pump from Jr's pump man and laser cut injectors and a Holset turbo that he recommends for the set up and bump the timing a little and there you have it.....

LOL Well first of all is the such a thing as good fuel mileage out of an E9? If so be honest and let me know...

I guess it all comes down to how hard u drive. So i will cut to the chase, Ive got a toss up between an 86 350 12 spd. Or an 88 E9 10 spd. with 3:87. The E9 has brand new heads and is an all original 1 owner truck.

AND.... the E9 is cheaper to buy, Is 5 mpg to much to ask for out of this thing for local rock hauling? Am I just dreaming here? ~Joe

U have to be careful with how u shift those things for sure.... But to just confuse things futher our 1970 mack has a rare 5spd with a direct and overdrive on the left stick. The right stick is R 1-5. Hard to find and very hard to get parts for..

thanks Greendog.... sounds like it may have to do for a while and ill just have to get an 18 spd later.. LOL

Ive been around tons of macks just not the 12 speed itself. I guess I should have stated it different. LOL

Well Im looking to buy a truck and the one im looking at has a 12 speed. Would it have a .71 final ratio like a 9 spd or an 18 spd?

I think I would much rather have an 18 spd over a 9 for sure and splitting of gears on the high side would sure beat the hell out of that. I do realize that the 12 splits on the high side too, I just have never been around them at all. Thanks in advance Joe

what is the actual trans. #? Is it R 1-5 on one stick and dir. and overdeive on the left stick?

It might be the "Dogs" that hold the center plate? We had that once happen to us. Mostly under a load when taking off.

Name: Mack MH (1985)

Date Added: 07 October 2008 - 05:41 PM

Owner: Mack Doctor Jr.

Short Description: E9 with a T2090 to be used for truck pulling

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LMAO "Rocket Mans" it takes lots of practice. Try tailgating backing up, to not get stuck in the mud. Thats where you get your gold star.

I know the Walker Pulling Team bought an MH with a KT 450 in it. Used it for truck pulling then pulled the motor and put it in a Superliner then sold the truck before it was done. Its in New York somewhere.

I understand what u all are saying and have very good points. But I have also had this experience. One other option is running a low pro tire. We tried this on our truck and it worked great. We lost 7 mph on top speed but it did pull a lot better. I do know u just cant change tires unless they are wore out too.. LOL Its just something to think about.

Ya!! HK I'd say ur right on that huntch.. The rack is sticking. You can "Thank" the real nice biodiesel for most pump problems now a days. A friend had the same problem with is farm truck. Our local pump guy says this junk fuel nowadays keeps him in business.

I was more curious about price i guess.. I had to make my own flange for the Holset H5ca turbo. But your right that stock manifold is like hitting a brick wall. I thought about trying to make my own but if the price is reasonable to me I'd just buy them. And if I remember right that H5ca doesn't have the diverter in the exhaust side either..