Aluminum Rods for a Daily Driver.

[project_tsi]

BME Forged Aluminum Rods

 

[Stew Pidaso]

Any updates on these rods? I plan to build my bottom end this winter and am having the same dilemma of Turbo-tuff or grp/RNR. Anyone have preferences over the two aluminum choices and why? Just looking for some more insight and past experiences.

*Edit: Also OP; what bearings did you/ do you run with your setup?

 

[Awd-laser]

I have been using eagle h-beams for 30,000 miles, almost 4 years and she is still spinning all 4 tires.

 

[EMX5636]

I'm still putting miles on my RNR's. Probably close to 20k on them. Still holding up, still don't regret it. I'm running ACL tri-metals drilled for the dowel pin. No issues

 

[Stew Pidaso]

I'm still putting miles on my RNR's. Probably close to 20k on them. Still holding up, still don't regret it. I'm running ACL tri-metals drilled for the dowel pin. No issues

How often are you going in and checking the stress? What do you rev to?

 

[EMX5636]

I have done it once at about 14-15k. I'll probably check them again in another 5k since I'll have over 20k on them. I rev to about 8500 normally, but it'll see 9k at the track or dyno.

 

[BoredDSM]

http://www.dsmtuners.com/forums/cylinder-head-short-block/311352-contructive-info-aluminum-rods.html

 

[Stew Pidaso]

I read the entire article above but didn't see anything about running a 21mm wrist pin. Are there any problems with running a 21 mm wrist pin?

 

[EMX5636]

I'm running a 21mm IIRC. No problems yet at low-mid 500's whp.

 

[Stew Pidaso]

When would running a 21mm wrist pin be a problem?

 

[EMX5636]

I couldn't say, but I know the regular 6-bolt 21mm pin has powered some fast, fast cars.

 

[Stew Pidaso]

are you stating that with aluminum rods or just any rods in general

 

[LandSpeed-DSM]

Plenty of steel rod cars have gone far on 21mm pins.

 

[Stew Pidaso]

how about aluminum though? I purchased a set of custom wisecos from a coworker and theyre for a bolt rod (21mm) so now that i have them im curious as to if its still a decent projected build to get aluminum rods but for the 21mm wrist pin because i didnt see anything about using a 21mm wrist pin. Only 22mm

 

[LandSpeed-DSM]

There's a certain presumption that if you are going to the trouble of using AL rods.. you would not want a "weak" wrist pin.

 

[Stew Pidaso]

How much weaker could it be though compared to a 1mm bigger wrist pin? Would it be safer to just run a turbo tuff rod with a 21mm then?

 

[LandSpeed-DSM]

How much power and rpm are you looking to deal with?

 

[Stew Pidaso]

Probably upwards of 600 whp and revving to about 9-10k

 

[LandSpeed-DSM]

At those engine speeds it would be nice insurance to go for the bigger wrist-pin.

 

[biglady112]

It is not about the diameter, it is about the wall thickness. I run 21mm .230" wall pins myself. 21mm pins will live a happy life no matter the material of the rod if it is a thick, quality metal.

 

[EMX5636]

I agree with biglady, if u get the HD pins from Wiseco (maybe others), I don't think the diameter will matter as much.

 

[1qkfwd]

Man up get some 23mm pins.

 

[Stew Pidaso]

Is there a measurable difference in hd pins and non hd so I can check. He didn't tell me whether they were hd or not. I'm assuming they would be considering he buys top line custom parts but just so I can check and make sure

 

[EMX5636]

The HD ones are super thick like these. Real easy to tell.

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[LandSpeed-DSM]

It is not about the diameter, it is about the wall thickness. I run 21mm .230" wall pins myself. 21mm pins will live a happy life no matter the material of the rod if it is a thick, quality metal.

Agreed, I have not seen a 22mm "upgrade" pin with thinner than stock walls though.