To the LNF guys w/ big turbos that are using k1 rods.........what's the max boost, whp/tq, and rpm you have you used so far?

Im just trying to have an idea what these k1 rods can take


thanks!

 

800 hopefully

 

I'm sure more power than lnf has made so far. A lot more than the average person will ever put into the car

 

I've been lurking at other 4 cylinder forums such as dsm, Nissan, etc

Seems like when they're using k1, they've only been pushing them about 150hp/rod tho

Which made me inquire on how those LNF people with real life experience have achieved so far ....

 

I ran 30 lbs and 8000 rpms. When that motor blew, the rods were fine

 

The k1 rods aren't a specific lnf rod but the difference is minimum....... Anyways they are rated to 800 so they should be able to handle 800 crank hp no problem. The carillos are a better rod and I'm sure will take 1000 all day...first get it on the dyno and get everything working properly and when you get close to 700 725 crank hp then you might wanna consider changing to something better. Until then I wouldnt worry about it too much. Cmiller made good power with them.

 

thanks for the real world feedback.

how much whp/tq were you getting before your motor blew?


what caused the motor to blow up?

thanks

 

That motor was a stock gen two block, it blew just to being weak, cyl 4 wall split. It was really like 32 psi and prolly 550 whp when it went, it made 526 on 29 psi. As for tq I do not know. For you tho, you should make quite a bit more power per pound with that big turbo you have lol.

 

hello are they really 800hp rated? I don't know.
I thought each rod is rated about 150hp

so about 600hp for 4 rods.



currently, BTF is just sorting out some of the bugs....and just street tuning it.

Just feeling out right now....how the two turbos interact...........and how the pcm reacts.


BTF is just concerned about the k1 rods not able to perform and keep up.


BTF recently had a three builds that had issues (bent/stretched rods) with the k1 rods
one was a honda that bosted 35psi/9k rpm
one was a honda has 11.5k rpm
one was a subaru with a light load (4k rpm)

he said out of the 50 builds he did for about 6 yrs......three had issues.


So kinda just gave me a warning about them. He doesn't want to push them beyond 600hp (flywheel).

damn...I wish I went for carillo I-beams


so we'll see. I just wana finish this build ...and start enjoying it first. Then upgrade to a stronger carillo rods later on....

 

ok thanks for the honest response bro .

I appreciate it.


so you were using stock block....w/ k1 rods?




after three years of waiting for this build to finish, I just dont want to risk it......and blow the motor apart.
I wana enjoy it first...........

I don't want to push it to the edge.......and end up destroying it.

I don't have the money for a new block/rods/pistons.


you know?

my wife will kill me......

 

I truly don't think the k1's are made to go 9k rev's. If you keep it at 8 or less, which you will need to keep it less then 7400 really until you get some cam actuators. But the big dog carillo's are good for it. Expensive, but worth it.

 

Yes that's their rating but they are cheaply made Chinese rods .......... With that bring said they is inconsistency within their manufacturing process. Stick a carillo next to any of the lnf spec rods out there and you will see right away why there's a cost and quality difference. Don't go turning 9k either

 

bro, do you still think we can push it to 725 crank w/o any worries?

 

Peak HP isn't typically what kills rods. They are subjected to many different stresses based on torque, rpm, or detonation. Torque can bend them. In your case, one mistake or malfunctin in boost control and you hit 50-60psi boost at 4000 rpm, your K1s are done. Too much rpm can stretch them as you said. Detonation can stress them even more than high torque levels and cause them to bend or break. With a good tune, they should handle 600whp, 500 ft lbs without issue.

 

ZZP rods were tested to 900 whp also, Forgot about that.

 

thanks for the input Matt!

 

wow, thats awesome.

too bad, my k1s are already installed.

I'll safely use mine after its done first.

when I need more whp....then I'll upgade to eithe carillos or zzp rods.....down the road.