As someone that's currently planning a high HP RB build, these videos are a godsend!! Thanks so much and please keep them coming!

Merci beaucoup ❤❤❤❤❤❤❤

This right here is the difference between a real engine builder and the wannabes. Incredible job.

Love it ❤ keep going !!!!! 😊

What would you recommend for main crank bearing clearance for daily drive?

Question again Mr. Colton what is the product code for those main bearings , beacuse I see that the accommodate the main oil gally groves... with more oil gally holes for the crank. I know some machine shops for rb25s you can machine the grove to accommodate more oil once you get i am assuming these bearings .. please can you give some insight

@boost.factory

4 ай бұрын

Hey! This is a common design for the RB26 Bearings, and you are correct the rb25 block is often modified to suit these, and they are physically the same as the RB25 main bearings with the additional oil supply holes! this is the standard main part #7M2428H-STD And a link to our site www.boostfactory.ca/products/acl-nissan-rb26dett-high-performance-main-bearing-set?variant=39694841282644

@jeanclaudedegannes1286

3 ай бұрын

@boost.factory thank you for your input , I will be attempting this mod to my rb25 , as well what are your thoughts on the calico coated acl bearings are they worth the extra especially for the rods? , great stuff btw I am about to do some upgrades to the oiling systm with the info you provided , porting the oil pump, the by pass valve insert etc..

Ok @Boost Factory, I see you. Patiently waiting for Pt 4. planning to build 1100-1200hp RB26. Would you recommend a similar main oil clearance as shown? 2 thousands? Or larger?

@boost.factory

11 ай бұрын

hey! we should have the next video up in the coming weeks, we have been quite busy with the Spec-D season in the summer months! as for oil clearances on 11-1200hp you would be dependant on your dimension and how minimal your margin of error is. (journal O/R & Taper, Crank Run out etc) if you cannot confidently say your .0002" or less on all aspects, i recommend running a slightly larger clearance .0028''-.0032" mains and .0025''-.0028'' rods if possible.

Question: do arp mains torqued to the 60lbs cause the girdle or main bearings to oval or out of round , in this case you may have to line bore , I am having that issue atm.

@boost.factory

9 ай бұрын

Yes they do, typically around .0005" or more out of round, and then when the head studs are installed it can be even more!. I always recommend an align hone with this hardware installed to give your self a great base to start.

So with the main bearing measurements, are you only measuring them because they’re being re-used? Like if you bought brand new bearings would you still be measuring each one? And even if you found one a little off what? Call them to send you a new bearing yeah?

@bowley4

9 ай бұрын

Also, same with the large crankshaft holes that the bearings go into… if you had that machined to square would you need to be measuring like that? That is, if you trust your machine shop to do the correct work and measure there work properly, this would be overkill to do it all again yes? And if the bore was larger than it should be, do you just get thicker bearings to make up the space? Or do you need a custom crank with the new specific larger sizes ground into it?

@boost.factory

9 ай бұрын

Great Question! These Are brand new, you should never assume that means what you are getting is good and can be installed as is. people make mistakes and that means some products are going to have manufacturing errors at times. which is the assemblers responsibility to catch and find. if i find one out of spec i typically just grab another set and use what i need. until i can contact the manufacturer for a replacement. this is rare, but if you don't verify you are gambling with your engine and assembly. thanks!

@bowley4

9 ай бұрын

So when you measured the crank and found that the oil clearance wasn’t enough and had to change the bearings out, would you have been able to have measured the crank first and then once you started measuring the bearings could have found sooner and stopped to take it apart rather than measuring all the bearings first then measuring crank?

@boost.factory

9 ай бұрын

you need to install the bearings into the block to measure your oil clearance, you cannot measure oil clearance with shells outside of the block. in order to make sure i don't waste time with a bad set of shells before i install them in the block. this is when i first check the taper on the bearings before i waste time installing them in the block, once i confirm the shell it self is good, they can be installed to the block and then measured. the crank dimension, and block main bore dimension and shell thickness as well as hardware tension all play a part in your final clearance. with out each one in the final position it is going to live in, you wont be accurate enough. sure you could add / subtract each one of those dimensions to estimate your final clearance but the tension on the bearing in the bore is a variable you cannot account for. this is why a physical measurement is best for final assembly. @@bowley4