I am getting a GMC Seirra LLY soon but I am not sure which chip to go with. I plan on removing the cat and placing a MBRP full exhaust with downpipe. I know the BD power pup can scan for codes and erase them. Can the edge/attitude do that? And are there any other options for getting rid of codes thrown by not having the cat on?


Jack

chipping a LLY is a bad thing it has 605lbsft of torque the allison tranny input shaft can only handle 785 lbsft there is a 1.3 torque multiplication in the torque converter any preformance chips etc. will void your warrannty

Thats what they make tranny upgrades for. And you can remove your chip for warranty work.

chipping a LLY is a bad thing it has 605lbsft of torque the allison tranny input shaft can only handle 785 lbsft there is a 1.3 torque multiplication in the torque converter any preformance chips etc. will void your warrannty








LOL you are in the wrong place to be preaching, Mr Goodwrench (If that is even your real name) http://www.dieselplace.com/forum/smileys/hihi.gif

I am getting a GMC Seirra LLY soon but I am not sure which chip to go with. I plan on removing the cat and placing a MBRP full exhaust with downpipe. I know the BD power pup can scan for codes and erase them. Can the edge/attitude do that? And are there any other options for getting rid of codes thrown by not having the cat on?


Jack





Back to our regular scheduled programming.


No the Edge juice will no clear codes.


As for not setting codes with your cat removed do a search on 'fingers stick' in this forum. He desgined a circuit to fuel the MAF when the EGR is blocked, it should also work for removing the cat.

thanks for the help

Are texas trucks throwing codes with straight thru exhaust? If you have federal emmisions it shoudn't. Mine doesn't anyway. Get the edge if you are going to get one performance upgrade. The bullydog stacked: juice lvl5, bd pup 1 is pretty killer. However, the pup makes the engine sound like a pop corn machine before the truck warms up. Doesn't bother me but may get under the skin of some. Mr. Good wrench....you are toooooooooooo funny! For your info...most stock allys can take more than you think!

I think federal trucks still throw codes but they just don't light up the MIL.

Why not just do a trans upgrade and run them both...http://www.dieselplace.com/forum/smileys/smiley17.gif

chipping a LLY is a bad thing it has 605lbsft of torque the allison tranny input shaft can only handle 785 lbsft there is a 1.3 torque multiplication in the torque converter any preformance chips etc. will void your warrannty


There are several dealers in Salt Lake City who sell the Edge. At least one dealer installs them on new trucks. The service manager at this dealership told me that 60% of their new diesel trucks are sold with the Edge.

2nd what dpower said about the edge bully dog stack - i think stacking the 2, with edge on 5 and the BD Tuner on Setting 1 that it actually runs better than either of the 2 on there own and it friggen hammers - that noise at start up is just plain terrible though http://www.dieselplace.com/forum/smileys/smiley11.gif

do a shift kit and it will hold 95 pup with 3-4 edge on a lb7 anyway


just save for your tire budjet it will make the stack look cheap

MR. GOO Wrench,


wrote, "chipping a LLY is a bad thing it has 605lbsft of torque the allison tranny input shaft can only handle 785 lbsft there is a 1.3 torque multiplication in the torque converter any preformance chips etc. will void your warrannty"


I am very sure my LLy came with 590ft/lbs from your factory. YOU MUST BE A SPIE FOR THE MAN!http://www.dieselplace.com/forum/smileys/smiley7.gifEdited by: blowinsmoke

MR. GOO Wrench,


wrote, "chipping a LLY is a bad thing it has 605lbsft of torque the allison tranny input shaft can only handle 785 lbsft there is a 1.3 torque multiplication in the torque converter any preformance chips etc. will void your warrannty"


I am very sure my LLy came with 590ft/lbs from your factory. YOU MUST BE A SPIE FOR THE MAN!http://www.dieselplace.com/forum/smileys/smiley7.gif





2005 605FT.LB. TORQUE!


NEW KING OF THE HILL http://dieselplace.com/forum/smileys/hihi.gif

Does anyone know if they did ANY modifications to the Allison's holding capacities while they have been adding horsepower and torque?


2001-2004 300hp 520tq


2004.5 310hp 590tq


2005 &n bsp; 310hp 605tq





I'm asking this because it still seems like you can add the same hp/tq to the LLY before limp mode occurs. If the LB7 could handle about +120hp before slipping, then the 2005 models should only be able to handle an additional 35hp! Anyone know what the scoop is?





Edited by: Scotty Seelen

.

My understanding is that the LLY power levels are the same as the LB7 in first gear (300hp and 520tq) and that the extra power (the 310hp and 590tq ratings) was only available in the rest of the gears. This was done to protect the allison, especially the torque convertor.

Check your math above......300hp versus 310hp is only 10hp difference......so going by your 120hp add limit wouldn't the LLY be able to add 110hp? Testing has shown that slip begins in the 80 to 90hp gain area (check kennedy etc etc etc)

Mr.Goodwrench: using your own figures of a 785 input limit and a 1.3 multiplication of 605lb in means we are sitting dead on the 785 limit (786.5). Hard to imagine how all the people are cranking out over 1000lb/ft and yet never heard of an input shaft breaking yet. The allison has the largest input shaft BY FAR of the 3 brands. Funny how nobody even offers an aftermarket one.......

Don't cheer too loud about being "king of the hill" with our 605lb tq cause dodge bumped the cummins to 610 to keep the lead before the first 05 dmax ever laid a tire on the ground. That's what GM gets for telling them what they planned to do before releasing it to the public.

.

.

The EGR will throw codes on all trucks but not the light on federal.

I don't know of any way for the PCM to know the cat is gone, the measurements taken for the EGR have nothing to do with the cat at all.

There shouldn't be any codes from removing the cat.

.

not sure about that - the egr configuration on the LLY checks for back pressure, which only comes from the cat !! by removing the cat, there is no back pressure, therefore the egr cant/wont read write and will not work properly

Oops, forgive my ignorance. I must be spacing it today. What I meant was the Allison's capacity to handle the TORQUE of the programmers/boxes. I know that both Edge and Banks couldn't make a stock Allison slip with 900lb tq applied in the 1-4 gears. If the holding capacity is 785lb tq in 5th gear, that means that with the new torque ratings on the 2005 models, your limit would be +180lb tq instead of +265lb tq. Programs that add 100hp are very close to the 180lb tq rating already.


I may be wrong, but I thought the figures for the 2005 models are: Ford (325hp/570tq), Dodge (325hp/600tq) and GM (310hp/605tq). Not that you're going to notice the 5lb tq anyway.

.

Not exactly true. The EGR verify checks for flow change at the mass air meter, which is caused by the added flow of the EGR valve opening the intake to exhaust flow after the turbo. Even with the cat gone there would still be flow into the intake as long as the EGR was not blocked or unplugged. The cat is well downstream of where the EGR picks up its exhaust supply and has no impact on any of that, nor are there any sensors at all on the exhaust to see the cat missing.


.

theres no sensors but it does read the back pressure - this has been verified by a tech 2 checking the egr with cat on and cat removed, hence the check engine light and codes - im sure other items like you mentioned above factor into as well but from the reading on the tech 2, there is clearly something different happening with the egr with no cat vs. cat installed

.

Those are the numbers I am aware of except that dodge bumped to 610tq to be able to keep saying they are the king.

I agree, 5lb/ft is no difference really and would be tough to even verify with back to back measurements anyway. Sounds good in a commercial to say you have the most torque though! :)

.

MR RUSTY WRENCH http://www.dieselplace.com/forum/smileys/smiley3.gif

My lly has no codes with the cat gone.

<span ="bold">MR.GOODWRENCH could be a Dodge or a Ford camp member
trying to win the battle at the source by preventing us Dmax owners to
have the easiest, cheapest and more powerfull upgradable engine
available... http://www.dieselplace.com/forum/smileys/smiley21.gif</span>