atheworld0

I have looked a bunch and can't see if anyone has done this yet, so I figured I would post about it. I build a simple b20v with ycp type r rep pistons, arp rod bolts on stock rods with a stock b16 head. Compression calculates to 11.7:1. Car was tuned on e85. He got bored so we got a greddy kit with a junk turbo, swapped it out with a knock off gt2871r turbo, and tuned it on 10psi on e85. Car runs pretty good and I have not put it on the dyno yet. I'm going for that this spring. My question is what is the limits of the pistons and wrist pins? I'm pretty sure the rods will hold on to 375-400, right at the max of the turbo, but not sure about the pistons. If anyone knows please let me know.

N2RCN4FUN1

I had a 11:5 n/a was like 265hp tuned on e85 arp bolts everywhere, stock rods and well, rod cap came off, big mess

Schister66

inb4 b20sleeve argument

atheworld0

I'm not worried about the sleeves. A good tune and they won't Crack under 400. My biggest concern is the pistons and piston wrist pin holding together.

bigG

iTrader: (6)

at 400 i think rods would be of more concern than anything else

Dark_Teg

I'll bite;

Be conservative or the sleeves will crack B20 sleeves are weak by design.

NotARaCist

iTrader: (1)

Stock rods. 400 HP. Yeah...have fun with that one.

turbohatch96y7

iTrader: (15)

B20 rods are weak dont do it!!!

NotARaCist

iTrader: (1)

Anyone remember that guy who did something similar on stock LS rods, a year later lost like, 50 WHP on the dyno, ripped his motor apart, and all four rods had bent evenly?

That won't happen for you, OP. They'll just snap.

atheworld0

Again, I'm not worried about the rods. They have been proven time and time again to hold that power. As for the pictures, that looks more like piston failure to me that then caused the rod to break.

turbohatch96y7

iTrader: (15)

LMAO

ok buddy

I forgot you tore down my motor and know more about what failed

Geis

I was going to start by saying sleeves the other day when I saw this, but with e85 he should be fine. Rods will probably be the first to go for sure, show us one build lasting a decent amount of time on stock rods at or above that power.

Hint: You probably can't

NotARaCist

iTrader: (1)

And now you understand why people catch heat from me in /1.

805 Integra

Not trying to start an argument but I made 432ish whp at 8300 91 oct. lsv on ls rods with arp bolts resized by the machine shop and bushed the small hole to fit forged pistons(free floating)Eagle Specialty Products B776-1 - Free Shipping on Orders Over $99 at Summit Racing something similar to this. Don't have exact measurement. I had plenty rods and was going to find out for my self once and for all, I guess for how long is to be determined But I would trust my rods done by the shop i go to for 350 any day all day and will continue to test the reliability. I had tore down and is currently running. Had headgsket issues(lost heater hose during back to back pulls) and was forced to run for several miles with milky water. Re used rods, rod bolts, re ringed, new bearings and is running now but will use water meth in the higher psi levels in the summer. So rods done right are good
The WEAKENST PART WILL FAIL sooner or later weather its the tune, the assembly, the machining, engine internals, or routine preventive maintenance, each one working with the others or against to prolong or shorten the engines life.
The pistons will probably take a beating at your higher end goals eventually from the back to back pulls even on e85, the walls will not like heat, a bad tune or **** fuel (af ratios & timing) Rods done poorly are just as bad as you might of already seen or read. No one denies that forged is the way to go and would let you get away a little longer from less than optimal situations. They have now vitara b20 pistons(84mill) which might be a better piston for your goal but trying things is how you learn good or bad. I don't know if I could trust your pistons at 400whp but good luck and keep us informed.

ls-t eg

I would guess through everyone's smart *** remarks an dick measuring comments on who knows more is if your confident in rods holding up to 400 then the pistons will PROBABLY not be a concern. But there are alot of people who have spent tons of money themselves so expect everyone else to an say they're stupid if they don't. I've never heard of wrist pins being a weak point but I also don't know too many people who push stock internals to 400. I would love to hear that you have good luck I love these kinds of builds. Good luck man and keep us posted on how it turns out

Schister66

LS rods with 81-82mm pistons can hold some power, but the B20 crew is underrepresented.

Adding some fuel to the fire
https://honda-tech.com/forced-induct...al%2A-2036623/

atheworld0

Thanks guys. I know the stock wrist pins will hold 400 hp, however I don't remember if these wrist pins are thinner and less weight since these pistons were designed for na. As far as I can tell, I'm charting new territory with this build as I can't see that anyone has done this combo before. We will probably stop around the ~ 350 mark just to be safe. Right now the car pulse hard on a conservative tune @ 10psi reving to 8000. Af is 11.0 all the way to redline. Might lean it back a tad when we get closer to dyno time and up the boost.

Geis

Oh well 350 should be ez on e85 lol
Pointless discussion now

bergercurtis

That thread needs some updating. Another D-Series Jeff Evans tuned was a 375WHP stock block Z6. Not recommended, but they did it. More fuel on the fire?

1990 Honda Civic - 375whp/270tq - NepTune - Dyno Graph

1stGenCrxRobby

I have an 11.5.1 gsr turbo on 8 psi street tuned with e85, ran 11.8 right off the trailer. Unknown hp at the moment. Ebay turbo kit for the most part. Turbo is balanced and running rc1000 injectors

TravisBiggie

FINALLY, someone banned this ********? took you guys long enough.

youre playing russian roulette by turboing a b20, and using stock rods for 400whp.

Muckman

iTrader: (2)

We don't seek out builds to add to the list. The owners need to contact me and I will add it to the list.
Another point I wanted to make is the Highest HP list shows B20 owners have not been successful in pushing them as far as the other engines.

bergercurtis

Makes sense. I initially wanted to low boost a stock Z6, but the more I thought about the money invested, the bit extra on the block just makes sense. I understand the concept. D-series in general and stock B20 doesn't lend much room to grow. I didn't know if the list was just abandoned since it promotes bad ideas or what. I was mostly poking fun with Schister on that thread.

Muckman

iTrader: (2)

Its more of a testament of how far you can push stock blocks; that's all. We all know its a time bomb. Some last longer than others.

Geis

A bit difficult to use that as an argument when there aren't many people boosting stock b20s anyway.