Topic: RC Connecting Rods VS. Carrillo

[newday777]

If Mike is doing parts of your HiPro engine I would use whatever he recommends especially if u go the 1000 cc route.  Lots of potential conflicts mixing and matching parts and Mike has seen it all. Good luck

Yes indeed, but if there aren't any billet blocks I'll probably be at 849cc to 900cc.

You want to go 900cc Stu.....it really makes a big difference.

Okay I'm game for that.

[Don R]

 Cycle X's 890 kit doesn't require top case cutting which is not an issue if it's going to be apart anyway. I wanted one to bolt in place of my rusty RC 836 cylinder. Right now, they're out of those sleeves. 
 

[Don R]

  OK, here's a twist on the question.
  In a Hot Rod Street bike with an 890 kit, would you prefer-

  Experienced RC steel rods with 12-point nuts that were on a raced 836, already on the crank or split the cases and use,
  New Old Stock MTC aluminum rods?   
   
  If I split the cases, I'd probably go bigger on the bore.  890 on existing rods can be put on in the frame.

[newday777]

  OK, here's a twist on the question.
  In a Hot Rod Street bike with an 890 kit, would you prefer-

  Experienced RC steel rods with 12-point nuts that were on a raced 836, already on the crank or split the cases and use,
  New Old Stock MTC aluminum rods?   
   
  If I split the cases, I'd probably go bigger on the bore.  890 on existing rods can be put on in the frame.

According to the video

You have regularly check the aluminum rods.

I would go with the steel rods, if they're within spec.

[Don R]

 I read a comment about golden rods that made mention of them being designed strong enough for blown nitro making 65 hp per cylinder.  One engine builder thought that such a rod stressed at a much lower level, as maybe a third or less HP wouldn't be stressed enough to cause failure.
 I can't help but wonder in the real world, how many RC golden rods or MTC alloy rods have failed in actual high performance street use, compared to how many outlasted the rest of the bike.
 On the flip side, I've seen a lot of partial sets of aluminum rods for sale at Race Car swap meets. The turbo drag bike might be a better place for the alloys. No way is it going on a long trip once it's running.
 

[MRieck]

 RC rods require a lot of case work to get the clearance needed. Like a lot of work.

[Don R]

 My old buddies stroker 750 with the MTC rods has a lot of clearancing done inside too. I assumed it was because of the long stroke. 

[Don R]

  I was cruising through Summit Racing today and noticed how cheap Honda Car connecting rods are. I know it's all about numbers made to get the price down, pro comp brand rods are $220 a set and supposedly good to 1,000HP. Wow. Crower rods and Carillo rods are even cheaper than what's available for us.
 Obsolescence is costly.

[PeWe]

Maybe there are car rods possible to use?

[Don R]

Maybe there are car rods possible to use?

I haven't seen any car rods small enough but that was my thought also. I'm sure APE and CycleX have both invested good dollars in production of their shop's rods but seem to be sold out. Those Carillo rods are lovely, someone needs to buy a couple of my bikes to finance a high dollar motor.

[Jerry Rxman Griffin aka MuthaF'er]

Don, did you get a set of the Crower rods Big Jay had made for us? His magical number to have special batches made is 8 sets (for the 1000 kits and the Crowers)

[Don R]

 I didn't but that's good info to have. It reminds me of the saying, the time to buy it is when you see it. 

[Jerry Rxman Griffin aka MuthaF'er]

He was trying to get Carillo to bring down the $1200 retail price of a set of 4 Carillos by using less expensive bolts. The ARP's support 400HP and are very expensive. We obviously don't need 400HP rod bolts. They wouldn't then do it so he contacted Crower and had a batch of 8 sets of beautiful but heavier rods built. My Carillos are in the 915 and the Crowers are in the 1000.

[PeWe]

These are heavy?
https://www.ebay.co.uk/itm/275140235175?hash=item400fa2cfa7:g:YToAAOSwAfhdwmmA&amdata=enc%3AAQAHAAAAoNgJar1O5BmdNa2HbAJTRrIEmig2%2BwLDMYkaaos7aL9%2FTNOXoxu4BI5n8Iv70Jh73iJsUZev7dhaACslo4tXsS6yVVEzPHup7dE6qhhklOnX48rYqbw%2FdyYV0hj5YPqsAuVJP1zGDVT5iq8udXvpM1y8JKsKFzZmPLjkhTHbPj%2Fzww%2FhX8aBtjt9nq6ukyKl8pEq1%2B6uvbaK7jCYpTVA37s%3D%7Ctkp%3ABk9SR6qSvIinYQ

APE rods
https://www.suzukiperformancespares.co.uk/product/honda-cb750-pro-strret-con-rods-set-4/6010/

[Don R]

They look like Carillos, someone copied them?

[PeWe]

The Australian seller where Terry get better iron rotors.
Same guy(s) as here.
https://www.rpengines.com.au/motor-bike-engines/cb750-big-bore-engine/

Their green race bike was nice.
Boring stock cylinder open huge oval holes for 2 cylinders, crimping in a new Iron part to be bored if I remember correctly.
Inspiration factory!

The APE rods will not be cheap with shipping and customs from UK. Better to go for Carillo.

I should give the aussy rods a try if I had need.
I have a new set of CycleX cryo super rods with ARP bolts waiting in a box.

[Don R]

 The worldwide cb750 sohc knowledge base is amazing. 

[MRieck]

 Those rods from Robinson are pretty heavy. If you look at a Carrillo the beam is very tapered as it gets to the small end. Light and very, very strong is a great combination.