tow rig tech

[Cruisergreg]

Not to get Steve on an engineering soapbox but...

Not every metal has a fatigue limit (as the paper points out). Aluminum is one that can take only a certain number of fatigue cycles, which is why aircraft airframes have a design limit of a certain number of pressurization cycles or in unpressurized aircraft, hours flown. Pistons are made of forged alumimun so in theory they could fail before their intended lifetime with the increased HP/torque from hyped-up forced induction. Granted other engine components would likely fail earlier as as result, but I'm jus sayin.... There's a price you pay for forced induction, one way or the other. You play you pay, eventually...

In thinking of longevity of the the engine, I'd be more concerned with fatigue. More torque, more stress.

Here's a somewhat technical paper on Fatigue.

"The significance of the fatigue limit is that if the material is loaded below this stress, then it will not fail, regardless of the number of times it is loaded."

Okay, it gets a little more than "somewhat" technical toward the bottom, but the point is it's possible that some engine components are stressed below the fatigue limit, but by increasing the engine output you go above that limit.

 

[BionicCruiser]

I can see that Greg. I'm not too worried with a rated life of over 500,000 miles and I usually drive like a grandma.

my short mileage run- started on P. del Volcan at 75mph at 24.7mpg on the 'lie-o-meter' on the dash readout, drove 8 miles on cruise control and it read 25.5mpg. this is with 75 miles on the tank, so averaged over that total(it changes faster with less miles on the tank once I zero it).
the meter was .5mpg higher than hand calculated when stock. now, I don't know the margin. I expect about 2mpg high.

I put in the cold side intercooler pipe and intake system. the EGT's are definitely lower, especially when I put a larger load on it, like a full throttle run. here are some pics-

 

[alia176]

ooooh very nice!!!

 

[Cruisergreg]

No worries - I was more trying to stir up Steve but he didn't (hasn't) taken the bait.

I can see that Greg. I'm not too worried with a rated life of over 500,000 miles and I usually drive like a grandma.

 

[BionicCruiser]

a quick vid. I think it hit the rev limiter and defueled. it's not like a car, it pauses for a second or 2 then kicks back in. so it sounds like I let off.

peel out

 

[sl33p3]

a quick vid. I think it hit the rev limiter and defueled. it's not like a car, it pauses for a second or 2 then kicks back in. so it sounds like I let off.

peel out

LOL, nice!

 

[Beowulf]

Redneck.
-Mike-

 

[BionicCruiser]

Redneck.
-Mike-

hey, I reseb...reserb...remes...that sounds like me.

 

[Cruisergreg]

So are you going to become one of those yahoos in a dully that are always trying to get me to race in the Lotus?

a quick vid. I think it hit the rev limiter and defueled. it's not like a car, it pauses for a second or 2 then kicks back in. so it sounds like I let off.

 

[BionicCruiser]

So are you going to become one of those yahoos in a dully that are always trying to get me to race in the Lotus?

some of those guys have really fast trucks. A buddy with a built race car says a couple of them have given him a run for his money! your car is way light though, my 8k lb truck with a these few mods would be no match.