Took the truck to the strip Saturday. Temp was 99 degrees on first run, down to 88 on the last run. Track is about 2800'. It was a test and tune, which was nice for trying out some tuner combos.

My trans is shot. The 2/3 shift was slow and I'm blowing right through 4th gear. The truck shifts into 4th and starts slipping, revs come up almost to redline and then it starts catching itself, finally grabs and it's time to shift into 5th. Looks like I found the limit of just having a converter/transgo. Anyway:

60' = 1.792
330' = 5.576
1/8 = 8.628 @ 81.13
1000' = 11.201
1/4 = 13.340 @ 105.78

I truely feel this set-up will runs in the 12's on fuel only, once the trans issues are taken care of. This race, I was ahead of the car next to me and on the 3/4 shift he passed me, after trans hooked back up, I again passed him. Shows how much time I'm losing on the shift.

Honey, I need some more money! http://www.thedieselgarage.com/forums/images/smilies/evil3.gif Eric, I'll be calling next week for ideas and hardware.

Rob

Holy Cow! That is the fastest #2 only runs I have heard a LLY run yet.

12's are cake with some trans help.

Don~

it was just a matter of time, thank your trans for being kind enough for letting you abuse it for so long, those #,s for lly are going to be impresive,(after trans) finaly a lly that can run with lb7, boy you are realy making me want twins for lb7, time to talk to JUICE,

Maybe some new clutches & a co-pilot would help out with holding.

The Co-Pilot will definately help those shifts..........I think whatever you choose the Co-Pilot is a must for dragracing..........

Good Luck and keep us informed........

T;) NY
.
.

The Twins need all the transmission you can get. It's a different power than drug assist. It's there 24/7

Dang Rob! I didnt know you had plans to go with twins when we first talked trannies...

Give me a call, I've got a few idea's.....

Eric, I had no idea either! I most likely would have gone the way I did anyway. I love to test a product's limits, and don't mind cracking the trans open again. It's all good fun, and I get to learn some things along the way.

Man! this truck is fun. Can't believe the amount of people that come up looking like :eek: after seeing it run. Funny sitting in the staging lane for the first pass and listening to the people laugh "he's racing that diesel truck WTF" Than coming around again and hearing "Damn there's that fast ass truck, watch this thing launch" Not many diesels running out here. A few ran last night, was nice having some smelly company.

Rob

Rob, how streetable is the twin setup. Could you do this with a daily driver? Course in SoCal dealing with the all the fart cans we have, you could have some fun with a setup like that. They would never see it comng.

My truck is my only transportation. The system drives just like stock, until you mash the go pedal. Twins are perfect for me because with the big tuners it used to smoke like a freight train, now a little smoke on take off then clean after. Makes it a lot nicer playing on the street.

IdahoRob
What track do you run at in ID.
I'll be in McCall for a couple of days in late Aug.

I run at Firebird raceway in Eagle. Tracks about 1/2 hour from Boise airport. If I can get my tranny put back together in time there's a test and tune on August 27th.

It was nice meeting you at the track Rob. Badass truck!!:ro)
You were telling me how impressed you were that your tranny was holding up. :D It is pretty sweet to have a fast diesel here. Can't wait to see it run with the new tranny.
Hopefully I should have my new motor in the turbo gsxr 1000 by the 27th.

I run at Firebird raceway in Eagle. Tracks about 1/2 hour from Boise airport. If I can get my tranny put back together in time there's a test and tune on August 27th.
Bummer...Just got word that I'll be there Sunday (21st)-Wednesday(24th).
Hey, You guys need a CAL LB7 for a turbo test fit???:D ):h :rolleyes:

One of the best things about twins is the fast spool up you get and the EGT reduction.

Large single turbos can be laggy and have higher cruise EGT in nearly all cases. At 3000 feet and up, that can be a smokey ride.

1300 degrees is great for a 500 plus HP engine of this displacement.

Rob went from a fast truck with tuning to "the fastest LLY truck" on Diesel fuel in a week. This is part of the reason twins are the rage on the Cummins side.

With some transmission and fueling tweaks, this will be one bad truck ( mid to high 12's ) at the track with all the manners of a stocker on the street. Plenty of low speed boost to control the smoke and EGT.

It will be a nitrous shot away from the 11's.

Don~

DonM, how much is there to gain with nitrous if you can clear it up with the charger?
Just asking because I don't know:help2: I'm not trying to start anything.

Rob went from a fast truck with tuning to "the fastest LLY truck" on Diesel fuel in a week. This is part of the reason twins are the rage on the Cummins side.


Don~

Don't forget sp33d has the same setup and his transmission is already capable of putting power to the ground.

OCDUNE

Nice meeting you also Badass1000. Watching you guys run low 10's all night long was a treat, makes me want to go out a find a bike again. Yea, spoke too soon on the tranny. Last two runs sealed it's fate. I'm interested to crack it open and look and the clutches.

We're still working on the tuning. This system has two blow off valves that are opened all the way. I'm only making about 40pounds of boost, and have a slight haze going down the track. Nathan was out of town for the track testing and wanted to be way on the safe side for boost. With some tweaking on the blow off valves, the boost will come up and the haze will go away.

I'll leave the N2O explaination to the experts, but I have a full bottle sitting on the work bench.:D

Don't forget sp33d has the same setup and his transmission is already capable of putting power to the ground.

OCDUNE

Might want to check with sp33d on that!

Might want to check with sp33d on that!

Rob, I'm trying not to laugh.... you were running a Transgo and Convertor only when you bolted the Twins on?
:eek:

If that doesn't qualify as a 'What were he thinking?' moment, i don't know what does!):h


Chad is having some Transmission issues, but I am certain they will be taken care of by Diesel Thunder!:ro)

One of the best things about twins is the fast spool up you get and the EGT reduction.

Large single turbos can be laggy and have higher cruise EGT in nearly all cases. At 3000 feet and up, that can be a smokey ride.

1300 degrees is great for a 500 plus HP engine of this displacement.

Rob went from a fast truck with tuning to "the fastest LLY truck" on Diesel fuel in a week. This is part of the reason twins are the rage on the Cummins side.

With some transmission and fueling tweaks, this will be one bad truck ( mid to high 12's ) at the track with all the manners of a stocker on the street. Plenty of low speed boost to control the smoke and EGT.

It will be a nitrous shot away from the 11's.

Don~

I think the ideal solution for the LLY's will be a larger VVT. You will still have bottom end like the twins, but without the plumbing headaches.

Whether or not nitrous will help alot will depend on if he can either bigger tuning or get injectors. We do not have any "overfueled" tunes for the LLY yet, not even close. We barely smoke on the top end, no where near what the LB7's have. Injectors would be nice, the cost is pretty steep and without cores, it means extended downtime.

It's possible that when the LBZ is released, we might have some interchangeability, and get some gains with it's turbo and CP3, but without a way to fuel it, we will still be treading water.

Might want to check with sp33d on that!

I believe Chad has a fully functioning ATS tranny courtesy of Mike L now. No need to bring up the :nutkick: .... j/k

OCDUNE

Yes, we can make more power with nitrous. Visible smoke from the tail pipe is an old school way of determining how much HP potential you have left from Nitrous.
A crude way to be blunt. It is close enough for horseshoes, but not Diesel performance.

We have injectors already in a LLY ( not honed out stockers ) and have been for a few months now. The owner to remain anonymous, but is free to speak if he wishes.

It is impossible to find a single turbo that will remain on the map at 60 PSI of boost. Even harder yet to find one that will live very long. Yes, you can run some singles that high, but much of the pressure is produced from expanding hot air as a result of high discharge temps. Twin turbos together work much less and remain on the map. Less stress and fast spooling is the name of the game for longevity and driveability. Variable single turbos are great and a step above the normal fair, but compounded twins that are designed properly will live long and productive lives and will spool with the best of them.

Don~

With the current tuning on stock injectors, the most I can get out of nitrous on an LLY is just 100HP. Perhaps some pane might help, but we REALLY need fuel.

Rat, have fun:ro)

Unfortunantly, better programming is never going to catch the LLY up to the LB7.

A simple fact of injector size is killing that for the LLY. Increasing the pulse duration on an injector that flows as little as the LLY does will do less than it did on the LB7.

Sure you can hold the solenoid open longer, but the fuel will be coming in so late the power wont increase as much. Just EGT and smoke.

I get a 90 and a 120 on the flow bench from the LLY and the LB7 injectors respectively. They will bang their heads on the wall to get the same power with duration. The sticks are too small.

Don~

Anyone want to buy a lightly used LLY? 15k miles):h

25% is a huge difference..wow

Unfortunantly, better programming is never going to catch the LLY up to the LB7.

A simple fact of injector size is killing that for the LLY. Increasing the pulse duration on an injector that flows as little as the LLY does will do less than it did on the LB7.

Sure you can hold the solenoid open longer, but the fuel will be coming in so late the power wont increase as much. Just EGT and smoke.

I get a 90 and a 120 on the flow bench from the LLY and the LB7 injectors respectively. They will bang their heads on the wall to get the same power with duration. The sticks are too small.

Don~

So does that mean you gonna help us LLY guys out Don :D

Dont sell it Rob! We have the answer! Nate will fill you in when he gets back.:ro)

Injectors is part of the answer to whippin on the LB7 and maybe even a Cummins, with luck:lol:

Yeah Juice I fell over when I saw that a few months back. The poor things are peeing like a puppy, so to speak. ):h

Don~

I'm only making about 40pounds of boost, and have a slight haze going down the track. Nathan was out of town for the track testing and wanted to be way on the safe side for boost. With some tweaking on the blow off valves, the boost will come up and the haze will

Your dumping at 40 psi!!! What a waste, why do people consistantly decide to dump boost pressure. Design the system properly and you won't waste any energy. I understand that you still need to tweak your system, but please put the valves on the exhaust side. Your putting the turbos into choke, hurting your efficiency and flow rate.:badidea:

Use a wastegate.

Anyone want to buy a lightly used LLY? 15k miles):h

I've had the same thoughts several times Rob, trust me. I think we will eventually be able to keep up with the LB7 guys though. We're inching closer and you and I have an advantage.

A couple people have approached me recently about injectors. I've got a new set sitting here waiting to be "upgraded" and I think I've found someone doing them the way I'd like to have them done. I'll be up there in a couple weeks so we'll talk more than.

Your dumping at 40 psi!!! What a waste, why do people consistantly decide to dump boost pressure. Design the system properly and you won't waste any energy. I understand that you still need to tweak your system, but please put the valves on the exhaust side. Your putting the turbos into choke, hurting your efficiency and flow rate.:badidea:

Use a wastegate.

There are already provisions for a wastegate now in the system. Nathan had to go out of town. In order to insure a smooth process of break in and to get Rob used to the change, the blow offs were opened earlier to minimize any troubles that might occur. A great idea, IMO. Not a design flaw, but what you are seeing is a work in progress not a finalized solution.

Of course the system is already working well now as evidenced by his killer track times and the way the truck drives. . BTW, the turbos are not in a choke situation either.;)

Don~

I've had the same thoughts several times Rob, trust me. I think we will eventually be able to keep up with the LB7 guys though. We're inching closer and you and I have an advantage.

A couple people have approached me recently about injectors. I've got a new set sitting here waiting to be "upgraded" and I think I've found someone doing them the way I'd like to have them done. I'll be up there in a couple weeks so we'll talk more than.

Injectors!..........keep us all posted! Don.....you gonna help us out with your injector magic or what.....come on man...............:help: :)

I get a 90 and a 120 on the flow bench from the LLY and the LB7 injectors respectively. Don~

What injectors are you flowing as the units I have from a LLY have the same size holes and amount of holes in the nozzles as the LB7 units?

...

...

What injectors are you flowing as the units I have from a LLY have the same size holes and amount of holes in the nozzles as the LB7 units?

I said these were the stock injector nozzles in the post above.

They share only the same number of holes. Not size. And not flow rate.

The LLY flows less fuel in laymans terms.

Don~

I said these were the stock injector nozzles in the post above.

They share only the same number of holes. Not size. And not flow rate.

The LLY flows less fuel in laymans terms.

Don~

Don

Thats what I do not understand, I have stock LLY injectors that I bought and I had the tips measured. They were 7 hole nozzle with .0055" holes and those are the same measurements the same lab gave me for the LB7 injector nozzle I sent them a couple years back. I wonder if they have different nozzles for a different model or something as the LLY injectors I got were off E-bay so I donot know where they came from.

Sorry for the dealy in response, but I was running the dyno all day long yesterday. In the heat of 104 degrees no less. :mad:

Anyway, do what you like with the information I gave on the differences in flow rates between the two nozzles. I honestly thought the information might help someone to understand why the LLY is slightly behind with LB7 in performance in some ranges.


Don~

Did you measure the holes don? any other things you can see that would make one flow different from the other?

where did you get that setup? And how much did it cost?

oops! i didn't catch the other thread..now i feel like a dumbass...