Hi Guy's! I know this toppic has been talked about alot in other posts, but here I am bringing it up again. Before the Turbo Master I was running a constant 13-14psi under full lock up and hard acceleration. I put the Turbo Master on the truck on Saturday and did some playing around with it. I gradually increased the boost until I got a steady 16psi on a pull fully locked up in OD and noticed a significant drop in EGT (100deg) on the same hill as I did the test before. I know lots of people say that even though it is intercooled that anything abouve 14psi is putting the motor at risk. So...to make a long story short(er) seeing as I saw a drop in egt at 16psi, do you think the motor will be at risk for longevity or will it be a bit happier due to the lower egt?:blahblah:

I do. I've had that feeling for awhile that higher boost is good for your motor as long as you advance the timing, put on gauges and open the exhaust.

Hey firefighter, did you ever resolve your long cranking to start problem? I remember you talking about trying the optic bump to see if it would start quicker.

Hows that head gasket gonna take the 16 PSI. Seems in my experience with boost that special head gaskets or head studs would be a must at that pressure. My 2-cents

As far as I know, as long as you make sure the engine is up to temp before getting on it the head gaskets should be ok, providing you don't get crazy with boost. I haven't done the optic bump yet and it is still a cranking b@#$ch! I just wanted to do one thing at a time so not to confuse the results. I am planning on doing that bump soon though and I will be sure to post my results. Thanks for the input too guys!:ro)

So QM, you figure that I am safe at 16psi? I just want to be sure, I can't afford a rebuild right now as I am in the middle of major renovations to the house. Gotta keep mama happy so she will continue to let me play!):h Just for curiosities sake, what kind of boost is everyone else running, and for how long have you been running it?

No promises on a '98-'00 with the oil spray channels.

Too many grenaded engines recently for me to recommend that boost level to anyone, I have every bolt on bell & whistle, I'm still going to be 18:1 before running that much boost. FF what are you doing that you think you need that much boost.

My motor was a complete drop in replacement from GM in late 2001 for the usual cracks. It has about 60,000 kms on it now. Would it be a better block than those ones from 98-00? I hope so. TD, well, I guess it is just the addiction to power. I use the truck to haul my car to shows down south in the summer but othere than that it is just my toy. I think I am going to back the Turbo Master off to 14 psi max just to be safe though.

I ran 15 PSI steady for 250 Km's with peaks to 18-19 PSI in my 00 while pulling my 7200 lb trailer. Never once de-fueled on me, EGT's did hit 1200F post turbo a couple of times but were never held longer than 15 seconds before letting them cool down.

And if you've read my other posts you could probably assume that wasn't to darn good now was it..

hey now for the good news, its been sneaking up on me since i bought the truck, i just hurried it along!

Yeah, I read them and they kinda scare me!:eek: LOL! CR, do you have an intercooler though? That might be the difference....although I could be wrong. That new block sounds good though!

No intercooler. YET... I'm seriously contemplating Kennedy's but when you convert that to Canadian i have trouble prying open my wallet. Now if John would say give me par on the Canadian dollar i'd call him with my credit card number right now. (after i figure out where the woofing is coming from)

I dont really understand how it all works but why does it take so long for the turbos on these trucks to spool up, i mean i can hear the turbo out the exhaust almost all the time, even a little at idle, it will even scream like newer trucks, the really really high pitched whistle in the dash, but youv gotta be over 2500rpms and be on it pretty hard to. If i had the power all the time that i have when that thing is spooled up good i feel like i could hang with almost anything on the road, pullin or racing

I dont really understand how it all works but why does it take so long for the turbos on these trucks to spool up, i mean i can hear the turbo out the exhaust almost all the time, even a little at idle, it will even scream like newer trucks, the really really high pitched whistle in the dash, but youv gotta be over 2500rpms and be on it pretty hard to. If i had the power all the time that i have when that thing is spooled up good i feel like i could hang with almost anything on the road, pullin or racingWhat do you have the turbomaster set to? If less than about 15 psi or so, it really makes a lot of turbo lag. (at least on my truck it did)

The turbo functions on exhaust energy - heat, volume, and velocity.

Engine rpm and loading determines exhaust energy.

The lighter the loading, the less energy available - 1500 and 2500 series will spool-up slower than a 3500, because of vehicle weight.

But, load any one of them with a heavy trailer, or such - loading creates high energy exhaust - and you'l see quicker low rpm spool-up.

Higher crankshaft rpm also creates higher exhaust energy, loaded or not - greater loading means greater hi-rpm energy, here, also.

My ole 8500lb bud draft horse spools up almost off-idle, because I leave the aux trans in o\d, resulting in 3.00 final drive - this high loading creates greater exhaust energy at low rpm because EGT is higher.

Wanna see quick spool?

Leave the trans in 5th at 30mph, stab the go-pedal - mine is at 20psi Boost by 35mph up to whenever I let off.

Exhaust energy, thru loading, is the name of the game, folks................:cool:

the tubo master is cranked almost all the way down. I dunno, i guess im just expecting to much outta this truck with no more than i have done to it and the fact that it is what it is. Riding in my friends dmax and powerstroke just give me a craving for more power, they can skip a gear and still throw u back in the seat, if i skip a gear i slow down about 20mph and smoke rolls out till the turbo catches up

Correct - don't compare your truck to a DM, PS, or DC - compare it to another 6.5 without any mods.

Like Dirty Harry always said - a man's got to know his limitations, and that also applies to his chosen equipment.
Ya jist don't hunt grizzly with a squirrel rifle.;)
And, vise versa:cool:

Also - you will not see the quick spool-up and higher Boost levels of an automatic trans truck, because an a\t 'stages' the engine - loads it - creating greater exhaust energy off-idle.