I just bought a 07.5 3500 Mega 6.7 anyone with any advise for the first thing to do?

Trade it for a 5.9. lol

Research and make sure all the TSBs from the production date of your truck, to current are checked and repaired, make sure the engine has a current ECM flash and you should have a good start.

Make sure to have the engine up to temp BEFORE driving, keep the engine in its opt operating/torque range of 1800/2000 rpm for mileage and self cleaning and never lug the engine.

Pay little attention to the few vocal bashers of 6.7s, they are the vast MINORITY.

OR

Take everything off your tool set will allow, start and immediately drive it while shifting at min 3500 on every gear change, and post all the problems and low mileage your POS truck has....[laugh]

Is this 07 used or new? If used asked to read the carfax report from the dealer. I would ensure that all of the latest flashes have been applied to this truck. I would then read all you can on the 6.7L engine and drive the truck hard. By this I mean use the EB and the 6 spd auto if equipped shift throw the gears keeping the engine between 1500 and 2000 rpms. Do not allow the truck to lug.
I love my truck and I have had very few issue with mine but mine is on 08 which may have a few different flash. I have learn to drive this truck a little different then my other trucks such as manual shifting of the auto.
My only real complaint is the oil change interval this seems to be 3000 miles and at $85 a change is more expense then my gasser. But I want this to last for 200K miles so every 3K oil change is required.

It was used with 12000 miles on it, and I have the carfax report I will look to see if it has had the latest update and if not take it and have it done.
As far as the 5.9 I still have the one in my sig and is still my first love still adding and getting more out of it.:cool:

yup your screwed, trade it now.

????
Everyone jumped off the ship when the 03's came out too.. Brother...

Do some research on the emissions controls and drive it. In a year when all the performance products are in full force, the 5.9 crew will be crying in their beer with 600 hp on a stock 6.7 turbo! LOL....

The Smarty will be out soon. The 6.7's may turn out to be a beast compared to the 5.9 when all the mod choices come out. Marco of Mads said the the Torque is capable of Horse Power x 3, where as the 5.9 is HPx2. So if your 6.7 makes 500hp you could be putting out 1500 ftpd of torque with the right tuning. That is beyond impressive.

"The 6.7's may turn out to be a beast compared to the 5.9 when all the mod choices come out."

Yup, I remember when the "NEW" 1955 265 CU IN SBC came out. :D

All the guys were screaming what a total pos it was....no performance parts, more valve parts to break, totaly different carbs....never gonna be worth a hoot. [laugh]

Check the current 427 SBC Z06. [laugh]

History does repeat itself......[dummy]

I have been looking at some of the DPF delete kits and they have you sign a waiver before they will ship does this waiver go anywhere or does it stay with them for their COA. Becuase I don't want to sign something that may flag my truck on some EPA watch list[laugh].

That waiver is so that they don't get sued. If you get hammered by the EPA/DOT you can't go back on them. It was sold for RACE USE only and they are not liable for street use. KYAK.. Keep Your --- Covered.

Personally i would get the EGR Block off kit, swap the muffler, add an aftermarket filter / psm (keep stock air box) and get the smarty when it comes out...

600hp on a stock turbo, what does that prove. that you can abuse the crap out of it and push hot air.what do you think your egt's are gonna be at the end of a quarter mile 1550 1600 lol.

600hp on a stock turbo, what does that prove. that you can abuse the crap out of it and push hot air.what do you think your egt's are gonna be at the end of a quarter mile 1550 1600 lol.

The 6.7 are built to handle higher EGT's. Those numbers are no problem for a 6.7.

With that being said, what are the EGT for the 6.7 I know that they say around 1200 for the 5.9 and short burst over. I will be installing a pyro but where should I put it pre or post turbo on the 6.7?

I have gauges installed in my truck, they have been in for over a year now. Whaen I am towing my 5er with the EGR plugged in last year during regen my EGT's would be as high as 1350F. With out regen normal running with trailer 900F. Driving around town and on the highway with out the 5er I would be 800F to 1200F depending if the truck was in regen or not. I would turn the truck off at 400F. Turbo is water cooled.
I have since unpluged the EGR valve gain, 2 MPG and lower my EGT's by 200F when driving the truck. When I idling the truck, it will be at 300F or lower. No issues with my truck since I have unplugged the EGR, been that way for 4K.

good luck with that. lol[laugh]

id love to have a 6.7 if i could do all the deletes and not worry about getting a ticket for it. but the 6spd auto still is the weak link for a performance minded nut like us, so i might just build a 6.7 longblock for my 06, when all the bugs are worked out these wont be bashed so much, good luck with the new truck.

Thanks, so will I expect problems with the transmission? I do some towing of a 5th wheel and some light towing of my boat.

Thanks, so will I expect problems with the transmission? I do some towing of a 5th wheel and some light towing of my boat.

No I would not expect a problem. The stock 68RE is suppose to be stronger that the stock 48RE.

lol thats the funniest thing, just last night at the track, iheard that exact same thing, the 68re is tougher. well all it took was 2 boosted launches with this 6.7. it had the edge j/a hot, all the delete's. bye bye tranny.the smarty is going to eat them up in higher sw's youll see.

Thanks, so will I expect problems with the transmission? I do some towing of a 5th wheel and some light towing of my boat.

You have to filter what people say on here...always look at their sig....our friend mulisha (example) has a 12 second truck....he's not looking at it from a light towing perspective....

I'm not a 6.7 expert, but common sense tells me that your trans will be fine as long as you treat it within reason....on a 5.9 the 48 trans would handle +90hp over stock...as long as you didnt thrash it...

yeh your right i was looking at it like that, tend to a little.and yeh i had a j/a and some other mods with the stock tranny for about 8 month's.it took a real lot of abuse with me behind the wheel. including trac time, 4wd boosted launches, and never a hic up.dynoed at the time just under 400.

I've seen 6.7s hit 1600 repedatly and still not blow up.

Thanks, I do look at thier sig's and and take things with a grain of salt but I do like to get all the info I can so that hopefully learn from their experance's at the track or on the road.

Its like anything...if you plan to play, be prepared to pay. Maybe the 6 spd auto needs to be worked over sooner then the 4 spd auto did when adding power. So far with 116,000 miles on the truck with 114,000 of that in stock form and towing about 50-60% of the time...not one problem. Now with testing the Smarty 6.7 I will be watching it closer...I intend to use the Smarty for mpg gains and timing as well as that kind of specific feedback now that I am in the Beta group and I completed Alpha . As long as I keep my thoughts that way [[laugh]] I hope to be safe. However, if I want to crank the power, I will address the trans...hopefully I do it in the correct order too...modify trans then modify power. Otherwise...modify power then wreck trans could cost more. [laugh]

If ya want to go mental...read my signature. [coffee]

lol thats the funniest thing, just last night at the track, iheard that exact same thing, the 68re is tougher. well all it took was 2 boosted launches with this 6.7. it had the edge j/a hot, all the delete's. bye bye tranny.the smarty is going to eat them up in higher sw's youll see.

Oh common, you can break any tranny whether built to the hilt or stock by doing boost launches.

The 6.7's proof is in the numbers starting to come in. Remember a 6.7 is essentially a stroked 5.9. No replacement for displacement. Once the emmissions are deleted and a tuner like Smarty gets the truck running right the 5.9 will have a hard time keeping up in an apple to apples comparsion of modifications.

hey rage blue any 3rd gen cummins can hit 1600 again and again. let me see you tow while hitting 1600 degree's and sustain it for a minute or two. you could say bye bye, cause something will let go.thats a no brainer

hey rage blue any 3rd gen cummins can hit 1600 again and again. let me see you tow while hitting 1600 degree's and sustain it for a minute or two. you could say bye bye, cause something will let go.thats a no brainer

Maybe so but the 6.7 is built to runner at higher EGT's over the 5.9, what ever the melting point is.

high rmp, then can you tell me why the 5.9 can hold more hp then the 6.7, cause thats been proved already.whats the reason now

high rmp, then can you tell me why the 5.9 can hold more hp then the 6.7, cause thats been proved already.whats the reason now


I don't remember the max numbers they can handle, but MOST people are not trying to hit that number. I suspect it is because of the longer stroke. So the engine breaks at 1100hp or something, big deal.

So if your 5.9 puts out 700hp a 6.7 with similar mods should put out 800hp. Those numbers are rough and there is more that goes into it. The biggest increase is the torque. A 700hp 5.9 will put out 1400 foot pounds and the 6.7 could put out as much as 2400 foot pounds. Now 2400 foot punds seems crazy and not realistic, but that is what Marco is claiming the 6.7 is capable of.

i on the other hand, did talk to bob about it and he did say something like that also.im really not complaining at all, i love all cummins. do you honestly think your not gonna need a tranny for all that t/q lol.5 6 grand.and why is it though that the 5.9 can have 3 400 more hp then the 6.7. looking for a real answer.

i on the other hand, did talk to bob about it and he did say something like that also.im really not complaining at all, i love all cummins. do you honestly think your not gonna need a tranny for all that t/q lol.5 6 grand.and why is it though that the 5.9 can have 3 400 more hp then the 6.7. looking for a real answer.

Yes your going to need a built proof tranny. We may not ever be able to use all the torque that a 6.7 can make. The 68RE may not be able to ever be built strong enough to handle to handle torque = HPx3 .

should be fun watching people try though.and im actually looking forward to the competition.:D:

Competition? Whats that all about? There are 10 second common rails out there that don't trash the 6.7 like whats been going on here.

Boosted launches that toasted a stock tranny.. Wow thats odd... [duhhh] Why would that happen? Adding 80 hp and stalling the tranny, wow that is weak isn't it? Brother...

FACT is that the stock engine handles up to 1400°F EGT's normally during DPF regens. And on the stock turbo is VGT, therefore all the oldschool theory about hot air is not factual anymore. Having a totally variable exhaust housing lets you fully vent the exhaust side out instead of trying to squeeze it through a wastegate. The Map is not a straight line anymore.

all i said is while i was at the track, there were a group of guys that were racing also. this one specific guy went once and started to line up for a second pass right away, and i said you shouldnt hot lap ect pull over and let her cool down,but right away his dum friends jumped on me and said it has the 68re in it . its tougher then the 48re that you have. i just laughed that one off.then i said you cant add 150hp to a stock tranny , and do boosted launches and exspect it to survive.what can i say next run it blew.and competition at the local trac, not the country.

[tapdshut] Well I've been told..

Keep it civil guys or it gets shut down.

Keep it civil guys or it gets shut down.

Thank you.

Does anyone have a full converter for the 6.7 yet? Someone was saying Goerend or Suncoast was modifying stockers a while ago?

I know someone that has a 07.5 6.7 and I can definitely say they don't like 4wd boosted launches. He did it twice and smoked converters twice.

NO 4wd BOOSTED LAUNCHES FOR STOCK TRANNIES!

Does anyone have a full converter for the 6.7 yet? Someone was saying Goerend or Suncoast was modifying stockers a while ago?

I know someone that has a 07.5 6.7 and I can definitely say they don't like 4wd boosted launches. He did it twice and smoked converters twice.

NO 4wd BOOSTED LAUNCHES FOR STOCK TRANNIES!

There are others on other boards running them and they work good. The 68RE tranny is the real weak link with all the power that is comming out. Smarty (soon), sticks, twins kits, dual CP3's are all avialiable now. Most guys that are pushing out 650-700hp with the 6.7 are running it with a manuel trans.