NX Dragster new pistons

COMP461

COMP461

Comp Diesel Sponsor
Joined
Apr 23, 2006
Messages
4,009
thought I would show a few pictures of the piston and rod combo before Tommy stuffed then in the motor.



4.125 bore
Piston 780 grams
Pins 300 grams 1.156 .300 wall tool steel . DLC coated
total bob weight 800 lighter then stock
16.75 to one

CIMG0011.jpg

CIMG0007.jpg
 
Wow, how much bigger is that bowl? Are u able to say what your target comp ratio is going to be?

Whose rods?



Cya
 
the rods are GRP . I've used their rods for years .

the bowl is designed for high rpm fast burn.
 
quench meaning that the tight areas roll the flame front towards the center.
this is where the last 100 or so hp is found , going to the basics of engine building .
 
Pistons

Looks like the Arias pistons that I run. I also agree you should never give up quench. You want it as tight as possible without contact. Jeff
 
hope you ready to start tuning , Tommy is getting close on the engine .
The car is ready to run as soon as the new standalone harness is ready

With just the power you tuned at Drag week in the NX mustang , the Dragster should run 7 teens . and with your magic , I see the title of worlds quickest diesel coming back to a Dmax’s .
 
Are you at liberty to say what material the pistons are?

Can't wait to see the dragster up n running!
 
The pistons are special alloy Forged Aluminum , it’s the same alloy at use in top fuel pistons. The rings are similar to blown Pro Mod.
These are some of the toughest pistons I’ve seen.
 
and those rods are aluminum also, correct?

What's the expected life of those pistons? full season? half season? two runs? no idea? :D


C-ya
 
COMP461 said:
hope you ready to start tuning , Tommy is getting close on the engine .
The car is ready to run as soon as the new standalone harness is ready

With just the power you tuned at Drag week in the NX mustang , the Dragster should run 7 teens . and with your magic , I see the title of worlds quickest diesel coming back to a Dmax’s .
Click to expand...

Wow Greg another prediction from you without even having the motor together. Who would have thunk it. :nail::nail::doh:
 
4.125" is the limit for the block and over the limit for some blocks. Hope you don't have any issues or you going to be need a few spare blocks as sleeves in this case do not get along well. Looks like you've destroked it as well due to the small size on the crank pin area. Most all forged pistons are only from a few materials so which one are you using? 2618 is the most common for top fuel and most drag race forged pistons but it doesn't last long for any street use at all. How come you ended up with such a heavy piston. I figure you would have got the weight of the piston down like you did on the pin and rod?
 
John Robinson said:
http://www.youtube.com/watch?v=A9OpkNfXmlQ








There ya go spouting off again. This short video clip is a replica of how suprised you are going to be when Bo Layne comes zooming past you at 200 mph. Believe me I have seen it.:owned:
Click to expand...

that’s you , I expect to run 200 , and I’ll be on the first turn out by that point

The motor in the Mustang is no where near this motors capability and its ran great the very first pass, that the great part of having it right before you go and make a fool of your self learning.


I expect the car to come out of the box deep in the 7’s and then tune from there ,.

This is the advantage of a Dmax or any common rail engine for that mater. Put it in the car , have the right converter and gears , and pull the trigger .
The car is finishing the final fit and wiring , its light and its got power .
Steve the piston is heavy as of now , but we will work with the piston manufactory and back weight out of it as we run more .
The 4.125 bore is working great , all of our engines have this bore , and haven had a problem yet , the mustang has a 4 inch stroke making it a 427 cid ., My first engine is a 4 inch stroke , to work with the fact that you can’t destroke a stock crank, my billet crank is a 3.65 stroke .

We are reducing weight every when we can, with a total weight of 1875 lbs on the starting line with a 200 lbs driver. And 1200 hp, its poised to come out of testing a 6.70’s at 210 mph
 
Dalpilot said:
Wow Greg another prediction from you without even having the motor together. Who would have thunk it. :nail::nail::doh:
Click to expand...



We have two motors together and running , the NX Mustang on small street tires is fast , very fast , and at 3600 lbs. put a small slick on it and it would dip in the 8's with ease.

just a idea, a well though out , and legal Pro Street truck with a good running Dmax would run mid to low 9's and drive to the motel every night and drive home after .


The Z 28 is out driving on the street every day , and tyler has already gone thru the first set of steamroller tires the first week end.


These two cars are the test bed for there program, take your dream wheel and extrapolate the Wight of the mustang 3600 lbs to 1875 lbs and the traction limited 147 mph pass , put that in the dragster and a street motor would run 7.20’s at high 190’s
Just the facts


This is at street tune with very little NX :nail::nail::nail::nail:
 
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If that camaro is out n running, you better be updating the build thread with a video SIR!!


Can you discuss the aftermarket crank you are gonna be running? Who builds em or where to get one?



C-ya
 
the crank is coming from one of the sources that I use to get my Comp Cranks from.. I know that Tommy has a place for the 4.00 stock cranks . They are hemi rods and are going in to the 20 or so air boat motors he is doing for a group in Bahran .


Tommy has open up a new shop that is going to do Dmax’s diesel, and 2.6 Cummins competitive motors and big inch Pro Mod's . Tommy is teaming up with Mike at Nitrous Express and Greg at ZZ . Together with JohnBoy , They have a really neat computer based on a bosch EDC 16 and it totally stand alone and tunable to 6000+ rpm’s deal.
This computer is the same one used on the NX mustang , project Z28 and my Dragster and these Air boat motors

Tommys contact is
KEETER PERFORMANCE ENGINEERING*nx*
940 696 FAST
940 782 5422 cell and the best way
 
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