More pulse because more power lol. I believe when we were at 3k pulse he said bumping to 3250 should net at least a easy 30hp to the wheels. He was very reluctant to do so lol
LMM: Single turbo recommendations
- Thread starter oscyjack
- Start date
your tempting fate with them your pistons :roflmao:. if your dropping to 21k with a commanded 26-27k, ill bet going back to the 3000uS will make more power
your tempting fate with them your pistons :roflmao:. if your dropping to 21k with a commanded 26-27k, ill bet going back to the 3000uS will make more power
X2. Need to back off on pulse until you find where it will hold rail, that's where you will get the most out of it.
Wally I'm on cape cod. And that's one hell of an offer that I might just take you up on. Appreciate it. Not sure when I'm headed to jersey (that's where you're at right?) but I'll find a reason to get down there. Your build helped me out a lot on the direction I've gone thus far. I'll probably keep stock fuel indefinitely though.
Josh that is quite a pulse width, good to know the lmm has handled it though.
In my mind the turbo means a visit to mark, I wouldn't run it without his tuning and I'm sure it'll be a fun visit. Maybe I can even get my hands dirty. Evan wouldn't let me witness let alone help with my trans haha. Never been catered to as much as that, felt like an ass just saying here's my keys, do work now please. It was nice taking a nap and waking up to a new trans though hah.
Y'all are great, thanks for the advice and input.
Josh that is quite a pulse width, good to know the lmm has handled it though.
In my mind the turbo means a visit to mark, I wouldn't run it without his tuning and I'm sure it'll be a fun visit. Maybe I can even get my hands dirty. Evan wouldn't let me witness let alone help with my trans haha. Never been catered to as much as that, felt like an ass just saying here's my keys, do work now please. It was nice taking a nap and waking up to a new trans though hah.
Y'all are great, thanks for the advice and input.
your tempting fate with them your pistons :roflmao:. if your dropping to 21k with a commanded 26-27k, ill bet going back to the 3000uS will make more power
Yep that injector has turned into a blow torch at 3300us
i feel a little history is needed from what im reading but you can smack me if you already know this :roflmao:
years ago, a 3250 tune was a race tune/max effort tune. it wasnt anything new and lots of guys called it a 32/32 tune where you got 3250uS and 32* of timing. this was considered the highest you could go pulsewidth wise "safely". now remember, this was mainly done on LB7 and LLY's with tougher pistons. the LBZ was new or newer so cracked pistons were not AS common but happened. Guys ran tunes like this for YEARS and dual fuelers were created to help bring rail pressure up. Hell even Pat put those tiny LLY injectors to the test and has his own theory on how well they work.
it wasnt till 6-7 years ago when we started seeing alot more cracked piston LBZ and up trucks and a theory was created about larger injectors/smaller pulse width helping them live more. Since then, many tuners have adapted to keeping pulse width out of the 3250 range for two reasons. 1, 9/10 times you cant maintain a rail pressure that makes the 3000 and up uS worth running. 2, you're much more likely to crack a piston. many guys will send a 2800uS race tune, then you log your truck and see if you have any room to add more if you wanted. 2800-3k is the norm now a days but 3250 for LB7's and LBZ's back when was the norm. LLYs liked to be around 3300-3350 to keep up with the old LB7's. Steves race tune in his LLY on stock injectors scares me just looking at it :roflmao:
years ago, a 3250 tune was a race tune/max effort tune. it wasnt anything new and lots of guys called it a 32/32 tune where you got 3250uS and 32* of timing. this was considered the highest you could go pulsewidth wise "safely". now remember, this was mainly done on LB7 and LLY's with tougher pistons. the LBZ was new or newer so cracked pistons were not AS common but happened. Guys ran tunes like this for YEARS and dual fuelers were created to help bring rail pressure up. Hell even Pat put those tiny LLY injectors to the test and has his own theory on how well they work.
it wasnt till 6-7 years ago when we started seeing alot more cracked piston LBZ and up trucks and a theory was created about larger injectors/smaller pulse width helping them live more. Since then, many tuners have adapted to keeping pulse width out of the 3250 range for two reasons. 1, 9/10 times you cant maintain a rail pressure that makes the 3000 and up uS worth running. 2, you're much more likely to crack a piston. many guys will send a 2800uS race tune, then you log your truck and see if you have any room to add more if you wanted. 2800-3k is the norm now a days but 3250 for LB7's and LBZ's back when was the norm. LLYs liked to be around 3300-3350 to keep up with the old LB7's
. Steves race tune in his LLY on stock injectors scares me just looking at it :roflmao:
this is a hell of a turbo for what your after
http://www.duramaxdiesels.com/forum/showthread.php?t=75792
http://www.duramaxdiesels.com/forum/showthread.php?t=75792
Agreed. Not ready to jump this second though unfortunately, one more month on the ole credit card paying off the trans. Gotta love those 0% intro deals hah.
I'm a little leery getting pricey used equipment as well. I don't have the bankroll to screw up, on the big stuff at least. I'm sure most of you all are trustworthy but you never know. Maybe he'd be open to taking some guns in trade, have more of them than dollars hah
I'm a little leery getting pricey used equipment as well. I don't have the bankroll to screw up, on the big stuff at least. I'm sure most of you all are trustworthy but you never know. Maybe he'd be open to taking some guns in trade
, have more of them than dollars hah
IMO you better stick with a stock turbo. If you don't have money for a turbo you don't have money for a built engine if you blow it up. For damn sure if it's your only vehicle.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
I have funds enough for what I plan for, but don't have $2k aside for avoidable mistakes is what I meant. good point though, As I mentioned up top I'm definitely going for reliability and longevity as well as more go. I'd rather sacrifice a few ponies to make sure I didn't jeopardize the overall reliability of the truck. There's always the pay to play factor, and for me I'm looking for the sweet spot of performance/workability while keeping everything well balanced operationally speaking.
I know at some point I'll have an engine built but I'd like to see a few more years or a couple hundred k miles before it's needed. I'm not a dummy so I do plan to do this the right way. I figured with mani/ups/studs/intercooler I'd be well bolstered for a turbo upgrade, is that Fantasy on my part? If it is, Id say I would be better off with a modded stock
I know at some point I'll have an engine built but I'd like to see a few more years or a couple hundred k miles before it's needed. I'm not a dummy so I do plan to do this the right way. I figured with mani/ups/studs/intercooler I'd be well bolstered for a turbo upgrade, is that Fantasy on my part? If it is, Id say I would be better off with a modded stock
Mark's 68 stage2r is a very impressive little charger. Great daily driving characteristics and has the ability to grow with your mods. It runs well on stock or heavy fueling. I push mine with 60s and dual pumps and even at my 7000 ft elevation it lights up like a stocker with that extra fuel. I'm up near the 800 rwhp point with a very small shot of nitrous. I daily drive/fuel only it around that 650 rwhp mark and it's an absolute blast. That's about the max usable power in my little single cab for everyday use.
I wouldn't personally recommend any aftermarket turbo with a stock engine...not expecting any sort of longevity at least. Just understand that you're gambling. Sure, guys will tell you how they've ran 700 rwhp through a stock bottom end for "forever". Some will live a good long time, some will only make it one full throttle pull. I tell everyone looking to go aftermarket turbo that if you don't have the cash just sitting around for an engine build, don't go down this road at all. I cracked a piston with stock fuel and air at 530 rwhp. About $20K later I'm back up and running with a whole lot more power. Just a word to the wise.
I wouldn't personally recommend any aftermarket turbo with a stock engine...not expecting any sort of longevity at least. Just understand that you're gambling. Sure, guys will tell you how they've ran 700 rwhp through a stock bottom end for "forever". Some will live a good long time, some will only make it one full throttle pull. I tell everyone looking to go aftermarket turbo that if you don't have the cash just sitting around for an engine build, don't go down this road at all. I cracked a piston with stock fuel and air at 530 rwhp. About $20K later I'm back up and running with a whole lot more power. Just a word to the wise.
Max effort tune, upgraded turbo, and your expecting or hoping for a couple hundred THOUSAND more miles out of your engine before you build it.
Sorry to burst your bubble but that's very unrealistic.
If you get another 100k out of that combo that's pretty good in my opinion. And that's assuming your starting with a low mile truck now.
Sent from my iPhone using Tapatalk Pro
Sorry to burst your bubble but that's very unrealistic.
If you get another 100k out of that combo that's pretty good in my opinion. And that's assuming your starting with a low mile truck now.
Sent from my iPhone using Tapatalk Pro
your tempting fate with them your pistons :roflmao:. if your dropping to 21k with a commanded 26-27k, ill bet going back to the 3000uS will make more power
It's not the whole run. I watch the logs and when rail does drop down to 21-23k pulse backs off and rail comes up. It's usually those 2 and 3rd gears when she's in the higher rpms 3k+ when rail starts to drop. Once I get above 60mph it comes back up to a strong 3200 and 26k rail.
I know I'm pushing it lol. I was honestly pretty pissed after the turbo and up pipes I only ran a 12.8. So I had him bump pulse up to 3250. Then talked with mark and he said vanes were tight. I haven't been back out to the track after more pulse and vanes opened up more.
I am planning on switching to marks tuning though. Kind of waiting to do injectors and stroker then have him retune. When I did talk to him though he said there was a lot left on the table if I only trapped 104 at 7k lbs
I meant to say 100k. I drive about 30k a year so 3 years ish. On my cell so it types what it wants, my bad. This is all good though, I'd rather be called stupid before I make a mistake hah.
Max effort as in the truck is at max effort level with the turbo, or max effort in regards to tune. I typically would not be on max effort tune for DD. Thank you for the straight up warnings. I'm not trying to fool myself, Trying to make the wisest upgrade if that exists. If it doesn't exist I'm happy to spend money on other things til I'm ready to build
Max effort as in the truck is at max effort level with the turbo, or max effort in regards to tune. I typically would not be on max effort tune for DD. Thank you for the straight up warnings. I'm not trying to fool myself, Trying to make the wisest upgrade if that exists. If it doesn't exist I'm happy to spend money on other things til I'm ready to build
My trucks been on built tans max effort for 25k miles and with this turbo max effort I'm at 10k miles lol.
I say go for the turbo. It's what holds our trucks back first. My turbo is my favorite mod I've done.. just listening to the thing makes it worth it lol. Yet you move more air and lower drive pressure. If the motor does blow and you build it you will still need more air lol.
I say go for the turbo. It's what holds our trucks back first. My turbo is my favorite mod I've done.. just listening to the thing makes it worth it lol. Yet you move more air and lower drive pressure. If the motor does blow and you build it you will still need more air lol.
Mark would be correct. Steve tuned a truck just like yours and was running low 12s this weekend at 108mph with just a 3kuS. When we tuned the very first 68stg2r, steve and i couldnt figure out some issues we were having with the tune. call to mark helped us off on the right foot to get it dialed in right. He also explained how many guys that tune that turbo dont take the time to get it right which leaves alot on the table. You cant go wrong going with the guy who built the turbo to tune it!! :woott:
**** now you are really wanting me to switch asap lol. I wouldn't mind a lower pulse and faster truck. What turbo was on that truck trapping 108?
the 68stg2r. for some reason i though you had one too but i just read your sig and see that isnt so. so you may not see 108mph on a smaller pulse BUT az air sucks big time to most other places and it was warm this weekend