RB26 Bottom End Build: Rods & Pistons

[@geneh831]

I like listening to Mike while going to sleep. His voice is soothing and I have dreams of tuning my car but strangely wake up wanting to WPC everything.

[@Dinkin_Flicka]

Listening to someone talk that has a natural smile on their face is mentally stimulating.

[@kellysandford1877]

loved hearing you on the HPA podcast! great video as always

[@motoiq]

Thank you!

[@402SHO]

Love how much information is in your guys videos👍🏽

[@Arash_67]

I love listening to this guy, if he made an audio book I would buy it 😊

[@latesttechtrends1227]

O my Dear, u have such an amazing personality... when you speak, it looks like you are smiling, sometimes i get glimpse of Sylvester Stallone and other times i see Jackie Chen. though i live 7000 miles away, but i sooo wana meet you. There is just soooo much positive energy going on inside you. Amazing job you are doing with these vids. Thank you from my heart. Its so rare to come across people like u these days.

[@Persocondes]

i Smashed that like button! shared and commented for the algorithm !

[@nobodynoone2500]

I don't even care for nissans, but your videos are always well considered and knowledgable. It's a pleasure to watch.

[@menumlor9365]

Thanks. Subscribe to my channel.

[@muasboy]

just simply listening to this guy..I learn so much. amazing content. Keep them coming

[@mixxeerr]

Love these technical videos

[@anthonyconti1065]

Awesome video please make more like this especially with the rb

[@allrise3938]

Love the video! Love to see more rb videos 😍🫡🫡

[@LeroyGTR]

more R33 GTR content please :) nice video

[@Xale-yt]

rb content let's gooo

[@tommy_kaira733]

Look at that beautiful Nissan b13 in the back sentra sunny

[@timworley8285]

good stuff

[@tombrown5508]

You take me to school with every video.

[@MrTDM09]

I never knew the RB didn’t like sauce past low 400s

[@motoiq]

especially the R32 ones, they break oil pumps easily.

[@Addmoreboost]

A lot is how you drive it. Riding the limiter is what breaks oil pumps. I’m on a stock bottom end rb26 that’s been making 500-600whp for about two years now. I don’t expect it to last forever, and I already have a spare block for rebuild, but so far it’s been holding up fine.

[@sircefiro]

Any engine will die if the pistons have heaps of det marks, to be fair OZ & NZ are way ahead of the US generally with rb's

[@Addmoreboost]

@@sircefiro for sure. The Aussies have close to two decades of nation wide development on that platform.

[@sircefiro]

@@Addmoreboost Yeah man, NZ too although recently OZ is really stepping it up

[@Twobarpsi]

Excellent info!!

[@karlvanboxel561]

Real good knowledgeable stuff the secrets in the detail gd to c these advancements coming thru guess it takes many destructive test analysis , kms and computer simulation diagnosis etc for all this I do sometimes wonder about piston coatings tho as most I have seen seem to wear off isn’t the oil itself supposed to do the cushioning , lubricating, and cooling etc. hmmmmm mayb Just fashion for fashions sake ? 😳😃

[@motoiq]

It depends on the coating, some can be harder than the piston metal.

[@davids4830]

I know you guys feel awkward on camera but, the format is great. Theres no bullshit and gimmicky boy racer aspects of your videos.

[@marshalomar9314]

I love your videos . Please make video about VG30TT engine . I know you guys just made an oil pan , looking to purchase one .

[@motoiq]

We will, it's coming soon, we didn't make the oil pan, BDE Engineering did, please read!

[@slfrules1]

Are those pins shorter too? Always wondered about that big end shaping! Thank you!

[@motoiq]

No, we are for sure not fans of short or thin wall pins.

[@slfrules1]

Is that application specific? I've been reading about V8 4.5" bore spacing and up engines and they seem to be moving towards a short length thick wall pin to reduce the leverage on em. They probably started with heaps more clearance between the rod and piston to eliminate. I'm guessing the RB already uses that space more efficiently so to shorten the pin you'd need to reduce pin land?

[@motoiq]

@@slfrules1 We don't like how the short pins don't have the surface area and start beating up the pin boss.

[@slfrules1]

@@motoiq Thank you!

[@test-vl2bd]

I saw you guys made a short KZbin video about your project cars, and noticed you guys have a Mitsubishi Evo. Will you ever create any Evo videos?

[@motoiq]

Yes

[@Yoitzmeful]

625 is a nickel superalloy very interesting, wish you talked about it more, lot more interesting than boring old steel

[@tommy_kaira733]

I see that g20 and 300zx too

[@nismofreak33]

tune up must have been wayyy too spicy on stock parts. if it was e85, people have gone to 1000hp on the stock bottom end. not for long obviously, but it is possible without any detonation lol. it should have been fine to at least 600hp on a stock block.

[@motoiq]

Not for longer than something like a dyno pull.

[@joshuaho3150]

​@@motoiq I've always wondered if Motive's stock bottom end build would've survived at least one full day of track use.

[@patrykanonim289]

Mike, I see a lot of information regarding pistons, but can you advise what type of oil rings are best for high rpm engines. Are three-piece rings better than two-piece rings? I've heard opinions that three-piece elements wear out quickly.

[@motoiq]

No one uses two piece oil rings.

[@patrykanonim289]

Thank you for your answer. Can you tell me what type of oil rings you would use for the S85B50 engine?

[@motoiq]

Something like what was shown in the video.

[@aaronbryan5095]

I always find it funny how stuby RB26 connecting rods look like. What is the rod length to stroke ratio though?

[@motoiq]

1.65:1

[@paulezay3599]

👌

[@Claustropbaoeia]

Can you make a video on the new 2022 wrx fa24 engine?

[@motoiq]

We will when we get one in here.

[@Claustropbaoeia]

@@motoiq yea well I got one, completely stock lol you're welcome to baller it out for me!

[@builtsubarusti7408]

So remember Jesse the mad scientist in the first fast and the furious? Yea this is who he should have been...10 second cars would be slow...too soon junior

[@NabGer]

In jesse’s defense, he didn’t have $100k under the hood of his car

[@builtsubarusti7408]

@@NabGer lolol true true!

[@McGJonin]

Australians get their stock bottom ends to over 500hp reliably with the proper mods and tune and oil. If your bottom end is failing at 400 you’re doing something wrong or bought an abused motor.

[@motoiq]

The oil pump gears fail.

[@McGJonin]

@@motoiq right but saying the pistons and rods start to fail at over 400/500 is incorrect

[@motoiq]

I didnt say that.

[@McGJonin]

@@motoiq1:19 “the weak point of the stock motor is the stock cast piston.” I’m not trying to be a dick, but in the video you say it’s not surprising that the motor started to fail at low 400hp and not long after that you say the pistons are the weak point. I haven’t watched the whole video because I was getting pretty frustrated so maybe you correct yourself later idk. I don’t see what your problems with detonation have to due with the oil pump either. Like I said I think y’all had a bad tune or something else going on to cause that. Oil pumps failing was solved with late model RB26s. People regularly and reliably break 500hp with a stock bottom end. Pistons and rods can handle 700hp

[@motoiq]

The oil pump fails on the old RB's in the low mid 400's. We had them fail in a few laps on the track or on a long uphill pull. Stock pistons fail next, then the rod. We see them fail in the 400's but not on cars we control. With proper tuning and fueling it can go into the 500's but there isn't much margin. The problem with the stock oil pump gears isn't solved it's just better with the R33 and later RB's. We convert to spline drive with serious cars. The stock pistons and rods cannot handle 700 hp unless it's gentile street use but those kind of people always say I drive it hard all day for years. Do a track or drift day it's not going to go so well. Even dry sumped full race RB's don't do so well on the track at 900 hp. Cylinder walls distort and main caps shift. Most of our customers drift or do track days, even compete so our bias is more conservative and based on what we see on those conditions.