30 lbs launching

[Jetpilot]

Ok folks I am now able to launch at 30 lbs boost with no breakage! Want to know what the secret is? Read on... ...



As the performance of our CTD has increased so has the abuse the automatic transmission is taking. The evolution is still unfolding but the latest problem being addressed by the manufactors is broken output shafts. Seems that they don't like sled pulling or hard launches too well. Up to now there hasn't really been much available for a good replacement.



I have been fortunate enough to been able to test out the new IE 1200 output shaft available from DTT. So far I have made launches as high as 30 lbs with no breakage. I also doubt higher lb launches will help at the strip because of traction issues.



Just thought I would let everyone know my impressions.



Doug

 

[MCummings]

Wow, Good Job!



The Output shaft upgrade is a hard one to bite, but well worth it. I haven't done it yet, but, I know I'm going to have a broken transmission again before middle of Sept. and then, I'll be biting, or taking a out a loan, and being bit.



As Piers says,, "That boy can break an Anvil"



Bill K. says 40PSI launches are not possible yet (traction just isn't there)



I've got some tricks up my sleeve, and we'll see what can really be done at the track, as far as boost, and E/T's.



I wish I had more time off to travel around to more events!



Ever notice how work always seems to get in the way of your hobbies?



Keep pushing the edge Doug!



Merrick Cummings Jr

 

[Evil Otto]

well i got both shafts and i broke some thing last Friday night in the trans or transfer case. i launched at 15psi got it in to second locked up the converter it hit 3rd real hard and that was all it took. it went away hard almost put me through the windshield. i think it is a input shaft i don't get any rpm drop at all when put in gear and it lock up in park so it is not the out put shaft. i have broke both the stock and cryo input and output shafts it will be a couple of week before i get a chance to pull the trans out. but i

will keep you guys posted. if they can build it i will brake its not

just buy power but buy beating it to death. there is no off time in my truck. i built it to beat but it wont stay together. i think this will be about the 9th trans in this truck. well if you ain't breaking your not driving it hard enough.



ED

 

[SmokinRam]

I agree...

Hey Doug,



I completely agree with you. Scott Hovey(Massdiesel) just put the new IE 1200 output in my truck this past weekend. I haven't had a chance to truely test it but if appearance means anything, that is one heavy duty piece.



Anyone seriously into Drag Racing or Sled Pulling should not even think twice about this latest upgrade.



Andy

 

[Jim Fulmer]

It's going to be interesting to see if anyone can get a 2WD to hook hard enough to break an output shaft, one thing is nice... . if you do it doesn't require a transmission pull. I can see the day when some of us carry a spare O/D section all setup ready to go



One things for sure Doug your not afraid of breaking something!



Jim

 

[TxDieselKid]

Originally posted by Jim Fulmer

It's going to be interesting to see if anyone can get a 2WD to hook hard enough to break an output shaft, one thing is nice... . if you do it doesn't require a transmission pull. I can see the day when some of us carry a spare O/D section all setup ready to go



One things for sure Doug your not afraid of breaking something!



Jim

We have launched a Ford at 42lbs before and made it hook.



I think ANYONE who is serious about power should look into this output shaft. I got to see one in Muncie this year on the DTT table. VERY heavy duty stuff. When you have that much power, it doesn't just break at the track or the pulls.



Andrew

 

[KatDiesel]

What are your new 60ft times... . launching at the higher PSI vs your old ones if you don't mind?

 

[Jetpilot]

Eric,



As far as 60' times I don't have any yet..... Unfortunately with the downturn in the aviation industry my schedule has really gotten lousy which means not much track time for me so far this summer. What I can say is that I have played with the truck on the street and this is what I have seen.



I have also been learning about tuning the p-pump and trying to find the right combo for max HP, N20, and track times. Hopefully this fall I will be able to get accurate times to post.



Doug

 

[Idaho CTD]

Just a word to the wise... ... Opie (the person who makes the billet output shafts) broke his intermediate shaft (we think) this last weekend trying to launch too hard. He had his nitrous set to come on at 25psi, so that didn't help either. His truck really pick up some power after a new set of nozzles from DonM and I think he got a little overzealous. He should be knocking on the 11sec. door soon.

 

[Bob Wagner]

thanks for posting that info Nathan

remember, be ready to pay if you play

 

[offshoreracr]

Doug or Nathan



Just curious how you are launching at such high boost. Last week I rebuilt my transmission and installed my new IE 1480 Billet Output. I tried experimenting with launching and the truck doesn't want to sit still after about 15 pounds. I spooled at pre-stage and staged with boost but the truck wanted to creep. I didn't want to try any more for fear of redlighting. Will the brakes hold more? Any one thinking about a Billet shaft should also look at the IE 1480, It is huge , I don't think this one will break. It's more work to put in but good insurance for high HP rigs.



Fred

 

[Idaho CTD]

Fred,



More brake pressure! You have disk brakes front and rear so it will hold a lot. I have seen 25psi at the line with my '02 and as long as you have enough peddle pressure it will stay put. Traction become an issue when you get up near 25psi as well.



Nathan

 

[Jetpilot]

Fred,



Pretty much what Nathan said . Push like heck on the brake and it won't go anywhere..... But like you have noticed there is a Knack for getting staged while under boost, especially above 15-20 lbs.



Doug

 

[offshoreracr]

Appreciate the answers Doug and Nathan. Traction is already a problem with 10/15 psi boost, and I have a Dually to boot. Now if I could just get past that dang rev limiter, with my 4. 10 gears I am out of rpm at 3/4 track . Fred



Anybody have any ideas?

 

[Idaho CTD]

Originally posted by offshoreracr

Appreciate the answers Doug and Nathan. Traction is already a problem with 10/15 psi boost, and I have a Dually to boot. Now if I could just get past that dang rev limiter, with my 4. 10 gears I am out of rpm at 3/4 track . Fred



Anybody have any ideas?

Hmmm my truck doesn't have reving problems but I run 285's and have seen 3800rpms. You might consider 255/85's or a set of big slicks

 

[offshoreracr]

Originally posted by Idaho CTD

Hmmm my truck doesn't have reving problems but I run 285's and have seen 3800rpms. You might consider 255/85's or a set of big slicks

I thought that you had 3. 55 gears in your truck. I have the Bd Rad switch so I did not see my rpms ( should have switched it off but I didn't think to) as it shuts down the tach. But at 3/4 track you could fell the truck fall off,I first lost about 6psi then immediately lost another 5psi at 7/8 track. I know that at 3400 I am out of rpm, how are you getting 3800? Felt like timing retarding or fuel cutback. I don't know but would like to figure it out. It could be that my injectors are not big enough, time for some magical EDM's, maybe time to call D. M.

 

[Idaho CTD]

Fred,



I do have 3. 55 gears and have seen 3800 when my transmission wasn't shifting quite right. It was on the 3-4 shift and I can lock out OD to do it as well. It's funny but my truck wont defuel at the line building boost like a lot of others either. Once I build 15psi or so I have to kind of pay attention because it will just keep climbing. My injectors probably have a lot to do with being able to run high rpm's without feeling the defueling. You might talk to Edge about your box and have them check to see if it is set to defuel at 3200 or higher. I would want at least 3500 rpms before it started defueling and unlimited is better . Defueling is the only thing that I can think of for the loss of boost at the end of the track, especially running the BD box. If your running stock tires they are also gonna kill ya on the top end.



Nathan

 

[KLockliear]

Doug, I too am interested to see how all that boost affects your 60' times. While playing with the white truck, I found it went no quicker leaving at 25psi than it did at 15psi. Never broke anything in that trans either... and all stock input/output/intermediate shafts.

 

[offshoreracr]

Originally posted by Idaho CTD

Fred,



I do have 3. 55 gears and have seen 3800 when my transmission wasn't shifting quite right. It was on the 3-4 shift and I can lock out OD to do it as well. It's funny but my truck wont defuel at the line building boost like a lot of others either. Once I build 15psi or so I have to kind of pay attention because it will just keep climbing. My injectors probably have a lot to do with being able to run high rpm's without feeling the defueling. You might talk to Edge about your box and have them check to see if it is set to defuel at 3200 or higher. I would want at least 3500 rpms before it started defueling and unlimited is better . Defueling is the only thing that I can think of for the loss of boost at the end of the track, especially running the BD box. If your running stock tires they are also gonna kill ya on the top end.



Nathan

Correct me I am wrong but I was under the impression that the ECM has parameters in it that when at 3400 it's lights out, and there is no way around it. I have a new Edge Hot++ Box that fuels fully to 3400. I know my tire size and gearing is a Killer but I am stuck with it for a while ( or at least until next week, I wish), at this rate I will be soon DIVORCED. I don't even have 10k on the truck yet and have spent a small fortune on FUN MODS :-laf Fred

 

[Snow man]

I cut a 1. 7 60 ft time with only 20psi of boost. I found by going much higher,the truck just spins. I have launched as high as 35psi successfully,it is literally impossible to hold the truck back at 35psi of boost. Opies output shaft IE1200 held it fine,no problem.