Competition Bentz Dragster, ATS TransBrake TripleLok Rocks, Engine Knocks, Goes BOOM.....

[sbentz]

OK, as promised, results of the ATS transbrake 47RE, TripleLok? Excellent. Got a little tuning to do on stall, release rate, and a few things, but WOW! The computer traces from the Edelbrock Data Recorder says it all: 0% slippage. No breakage, no slippage in t-brake mode. We only lauched at 28 PSI boost for a "easy test".



Results: 9. 13 / 156 mph.



On the record run in Pomona, 7. 98, we ran 150 mph at the 1/8 mile, and 167 at the 1/4.



Today, only 122 at the 1/8, due to a soft 60' test pass, but it went 156 at the 1/4. This is huge. To go from only 17 MPH on the back half, to 34 mph, is right what we expected. This was with the engine eating itself up during the run.



What happened to the engine? Well, the #6 hole that we knew had bad ring seal due to scoring it out last year, finally said enough. It scored out, blew about 2 quarts of oil all over the chute, and got a little HOT.



We got it back to the pits, dumped the computer, cooled it back down, and fired it up to check to see if we had much blow-by.



It sounded fine, so we warmed it up a bit, Dustin whacked it about 3 times to get it spooled up and it went knock, Knock, KNOCK! Time for the spare motor. Enough passes on the old stocker.



Photos later after teardown, got to go mow the lawn... ...

 

[Hohn]

Maybe you need oil better than Lucas



jlh

 

[COMP461]

sounds great , with that back half you should improve . congratulations

 

[RacinDuallie]

That figures! you finally solve your trans issues- Then your motor decides to have enough,

that's o. k. though Throw another bullet in there and go tear up the track with your new transmisson!!

Next time don't be so soft in the 60'!!- could 175 mph soon be at reach- ?


I say GOOD JOB! Hurry up and get her ready for the next event!!!

 

[sbentz]

Maybe you need oil better than Lucas



jlh

Well, as you will see below, the failure had no connection to oil. Matter of fact, it probably kept us from seizing the piston. And by the way, I don't know what oil you like, but Lucas has done pretty darn well for us.

 

[COMP461]

I use Lucas oil, and it works just fine .

 

[sbentz]

sounds great , with that back half you should improve . congratulations

Dustin said the car finally pulled all the way to the finish line. Matter of fact, we are way off on rear gear now, WAY too tall. With the right rear gear, and tweak or two on the trans, we shoud be better on 60 foot times than ever.

 

[sbentz]

That figures! you finally solve your trans issues- Then your motor decides to have enough,



that's o. k. though Throw another bullet in there and go tear up the track with your new transmisson!!



Next time don't be so soft in the 60'!!- could 175 mph soon be at reach- ?





I say GOOD JOB! Hurry up and get her ready for the next event!!!

WE'RE ON IT!



I think we will wait for Eric McBride to pop the 175 first, so we have something to shoot for.....



Or not... .

 

[sbentz]

What Failed???

We dropped the darn valve seat of all things, the #6 exhaust valve seat. Dropped into the cylinder, and beat up the cylinder and piston pretty good. Got to check the turbo drive sections, as they usually catch heck from the debris flying out.....



This is why I have said before that it may be better to have heads without seats for racing. Especially if you run in the 2200-2500 pyro range...



Oh well, more reason to build a better mousetrap...

 

[Cummins4Life]

Ouch.



But #5 looks like its in great shape!

 

[Sled Puller]

Time to order Scheid pistons, as long as its down?

 

[RacinDuallie]

WE'RE ON IT!

I think we will wait for Eric McBride to pop the 175 first, so we have something to shoot for.....

Or not... .

NOT!- Get her back out there so that you could add that to your list of firsts!!!!Oo.

 

[RustyJC]

This is why I have said before that it may be better to have heads without seats for racing. Especially if you run in the 2200-2500 pyro range...

What we do on one of our large industrial 4-cycle diesel and dual fuel engine lines might work for you. We weld in Stellite in the valve seat areas of the casting and then machine it. If required, the valve seat areas can be rewelded and remachined following the initial installation.



Rusty

 

[COMP461]

Time to order Scheid pistons, as long as its down?

didn't know they had a piston forge or machined them.



Aires makes some great pistons ,and so dose Ross.



my new pistons are Aires and are about 75% the weight

 

[Sled Puller]

Aries does make a nice piston for the Cummins.



Here is the part #: SCHEID

 

[RacinDuallie]

Aries does make a nice piston for the Cummins.

Here is the part #: SCHEID

From the looks of things - it looks like the stock pistons worked fine for Scott- why change?

Those pistons look like the same ones that were in my 98. 5- 24 Valve- Scott am I right?

 

[COMP461]

Aries does make a nice piston for the Cummins.



Here is the part #: SCHEID

I went straight to Aires , no problem , I wanted something innovative, and new , not the old design, now I have a piston also

this is a drag racing piston, and not a pulling pistons , for that you still need the heavy , piston and the Scheid piston is great , but expensive



or maybe the Ross pistons that are in the Edge truck

 

[COMP461]

From the looks of things - it looks like the stock pistons worked fine for Scott- why change?



Those pistons look like the same ones that were in my 98. 5- 24 Valve- Scott am I right?

for most the stock piston is more then adequate , up to a 1000+ hp the best piston is the 2004 and up

 

[RacinDuallie]

Those pistons look like the same ones that were in my 98. 5- 24 Valve- Scott am I right?

Yeah but its nice to have pistons in stock and plentiful- and cheaper than those others mentioned.....

 

[COMP461]

SPEED COST HOW FAST YOU WANT US TO GO.



I am going to run a 7 second pass , and to do that it takes light weight parts , and roller cams , High ratio rockers systems , and the ability to buzz the motor up to 6500 RPM's + and make power there. The head we ported was one of many we have been on the flow bench with; it was big, but in no way extreme. I don't post pictures of every thing, but try to give a general ideal of the direction needed to go in to make the power need to achieve the goals. I really believe that when it’s over I can run in the mid seven second ranges. This requires RPM, RPM and RPM, to achieve that you need the one thing that a Cummins lacks Air Flow



I have taken a head way farther then the head you saw, but that is not something the public will see. The quest for Air flow is most of the battle in getting these motors to run