So the alunimum rods save the bottom end when detonation is severe above the piston? Cool

I dont understand what can make the engine handle 10,000 rpm that's attributed to a rod though

 

detonation will kill your motor regardless of the rods used....aluminum has a little give to it...that little give keeps your bearings from getting pounded at high rpms and boost

 

I'm wondering if you had a clearance issue? We have beat the living hell out of the motor and each time with the Olivers we had bearing issues but not the case with the aluminums. I do know we did the oil pan mod were we made a extension to the bottom of the oil pan and extended the pick up tube. We were dropping 30 psi of oil pressure with a good 60ft time at the track.

Once we did that it helped the scuffing on the bearing but the knock from me pushing the timing so hard you could see were the bearings was eating itself away.


Here is some pics we did to the oil pan and pick up









the map volts or the purple line is our oil pressure

Now i would imagine that when you did cut a good 60 ft allot of the oil is still in the head. So the oil pan also has about 2 qts or so left in the pan which slams back into the back of the pan. But talking to people on NABR forums and Marco,Martin,Jake,and a few others the aluminum rods really helped there bearing issues a ton

 

+1

 

I put 14k on my EVO this year.

My EVO should only be in the 500whp range so we will just see what they do. On my quest for 500whp and 10.9 in a full weight SSL with a stock Turbo.

Could not be more happy about he bearings. Even when the tune was good the bearings would look like carp after 60+passes and street time at the 700whp level and with the 42r at the 1000hp level we had about 20 dyno pulls and 8 runs at the track and they looked like crap. We have had a good 40 dyno pulls and over 30runs at the track with over boosting problems (57PSI) and they look almost new. I would even think of rerunning them even though I am not.

Ted is your opinion based on any 4cyl motors or V8 stuff?

 

Given the specific output and rpm potential of a 2.0L 4 cyl at 500whp, the rod sees substantial stress. It isn't acute stress that's the problem, but the effects of prolonged stress cycles that fatigues Al.

But this isn't really an opinion, it's just a basic physical property of Al. This is why exotic OEM engines use the more expensive Ti and not Al. If you're going to use Al rods for a prolonged period (e.g. 50k miles), I'm curious to see what happens. All I know is that I won't be the guinea pig for that test.

 

First post fella's so greeting all. Good reading on this forum, I just love all this 4cyl turbo neck wringing

I'm no expert but like to soak up knowledge and find it very interesting how high revs with aluminium rods are preserving bearings. Is this due to larger clearance maybe? I've read in the past an oil pre heat is a worthy technique with aluminium rods, is this something anyone here does?

The Groden rods are to my mind a very keenly priced product, much cheaper than market leader (legend has it). How can this be?

For your interest http://www.bmeltd.com/rods.htm

Sharing knowledge is the way forward, keep it up guy's

Nik

 

I talked to BME today about possibly getting some rods from them. Still a toss between Groden, BME, Magnus.

BME said send the specs i want and they will make a set no problem but that the rods should be checked after 50-100 passes depending on the power output.

Groden said that he guarantees his rods and that you should be okay for 15K miles before having to change the rod bolts and checking them.

Magnus - I haven't talked to yet about there rods but i will try and get ahold of Marco next week after the holidays but i can kind of guess what will be said.

So we will see im going to talk to BME some more next week and pick his brain on some things. If everything pans out okay we are going to run some tests on them with a couple different rod ratios to see how they work. One thing i know is that BME as most people know is what all the Top Fuel guys use in the dragster and funny cars. There is a reason they chose BME but i want to find out what those reasons are and see if we can bring BME into the import scene.

I still and probably never will get a straight answer from Groden about how his rods are able to last so much longer then any other aluminum rod without being checked. Of course there is the obvious answer of he uses a space age aluminum but then again don't you think being a small shop that the big boys BME would also know about this?

Hope to update everybody after the holidays!

Paul can you show some pictures of the bearings that came out of the car if you still have them?

Thanks
Chris

 

Sorry I keep meaning to post the pics. I still have the bearings and will get them up soon. Wont be back in the shop till next Wed so it will be then when I will try and get the pics up.

 

BME been in the import scene for some time allready. I know of two 9 second 4cyl's applications that been using them for a couple of years allready. One of which is a honda making 900hp at 10.500rpm and a Toyota MR2 around 800hp at 9000rpm. After one complete season the Honda application was tore done and found the rods to be in perfect conditions. At first the owner was skeptical of aluminum rods but was assured by BME at the time if we could stretch it they were free. His actual words was throw everything we had at it and try and break them. That was 3-4yrs ago. You'll be suprised how many imports run those rods.

 

Ive been running Pauter rods for years in my old VW Bug turbo motor and nitrous motor shifting at 9500rpm. They also make rods for the EVO http://www.pauter.com/mitsubishi.htm Its worth a look. They used to make aluminum rods with titanium caps. I used these with little to no bearing wear after 15 to 20 hard weekends at the track.

 

Here are the pics of Pauls bearings from the 1014whp, 20 passes and 30+ dyno pulls.



This was the 1009 whp, 20 dyno pulls and 7 passes on the steal Oliver rods.

 

Thanks for the pictures! You have a PM!

Chris

EDIT: BTW im guessing the oblong holes are from the pins that aluminum rods use. Just so everybody knows and it doesn't become a issue..lol..

 

Yes those holes are for the spin pins that are in the rods.

 

Paul I think its time you test some carrillo rods too.....

PS: Did you ever talk to your mustang guy about the TT setup?