B18 Connecting Rod Question CROWER & EAGLE

[hondaman1986]

is there enough material left on the stock pistons wrist pin area to still be stable?

[snoopyloopy]

is there enough material left on the stock pistons wrist pin area to still be stable?

? i think so. i *think* accordtheory is running an ls/a20 rod-piston combo in his turbo motor and it has apparently held up alright. so i assume that there is.

[hondaman1986]

? i think so. i *think* accordtheory is running an ls/a20 rod-piston combo in his turbo motor and it has apparently held up alright. so i assume that there is.

ok thats reasuring

[cygnus x-1]

Unless you're using forged pistons I don't see the point of upgrading the rods. You should probably use ARP rod bolts though. These are the ones that fit A20 rods: ARP 208-6001
They need to be modified very slightly, I believe to grind down the bolt heads to fit. Not sure exactly as the shop did mine.

Incidentally with my rebuild I used stock rods and pistons with the following:
Weber carb
mild port/polish and performance 3-angle valve job
Colt triflow cam (stage 1)
S&S header (still waiting for coating)

C|

[ZackieDarko]

if the A, B and D rods are all the same lengeth and have the same bottom end (which they do)

and the A and D have the same size wrist pin (19mm) couldn't we just get some D16 rods and use them with stock pistons? TunerToys makes some great rods for the D...why not get some of those and just cryo treat some DX pistons?

[hondaman1986]

eagle makes some great rods for the d seires too here take a look

[ZackieDarko]

hmmmm this excites me imgonna see if i can get a hold of some D rods and try this out

[hondaman1986]

i wonder if there is any real diffeance between the two eagle rods they seem to be the same exept for the wrist pins. also the stock d16 rods are only good for 220hp at the most so it makes me wonder if the b18 rods would be better or if the d16's are. hmmm ill give them a call if i can

[cygnus x-1]

How much does cryo-treating cost?

C|

[ZackieDarko]

if somebody could find a 21mm to 19mm bushing we could use the B18 rods with stock pistons

[hondaman1986]

if somebody could find a 21mm to 19mm bushing we could use the B18 rods with stock pistons

as far as i know you never will because to have that adapter you would have to have a 2 piece wrist pin just causeing it to fail quickly... like the first start up

it would be cool as heck if they made them though

[ZackieDarko]

i have been doing some research on a 21mm to 19mm bushing


crower used to make brass ones so the D guys could rock LS rods without geting custom pistons...but alas they no longer do this

[rjudgey]

bushing can be replaced with smaller or larger one, old one is machined out new one made and pressed back in. Not hard when done by someone who knows what there doing off.

[rjudgey]

Oh biggest problem is that the rod would be a floating pin but the piston is designed for a fixed pin so not sure how you would get around that other than custom forged or B18 piston at 83mm with a blank top and then have the crown machined for our 3 valve chambers.

Also last time i measured my A20 wrist pins they were 20mm? Also my stock rods were good upto 200bhp but they didn't take to well to revving upto 7.5k rpm completely stock but balanced lasted 30k miles then they snapped at the neck completely off two at the same time!!! Like a grenade going off inside was quite spectacular!!!

For the price of the Eagle rods e.g. bugger all i would get them and then have the B18a/b pistons made up at 83mm size and have blank crowns, then have a engine specialist machine the crowns to match our heads. Or just have JE/Wiseco to custom make them to our needs (which would probably be more) But then again doesn't diamond have a pattern for our engines for the Eagle rod size wrist pins?

[MessyHonda]

Oh biggest problem is that the rod would be a floating pin but the piston is designed for a fixed pin so not sure how you would get around that other than custom forged or B18 piston at 83mm with a blank top and then have the crown machined for our 3 valve chambers.
Also last time i measured my A20 wrist pins they were 20mm? Also my stock rods were good upto 200bhp but they didn't take to well to revving upto 7.5k rpm completely stock but balanced lasted 30k miles then they snapped at the neck completely off two at the same time!!! Like a grenade going off inside was quite spectacular!!!
For the price of the Eagle rods e.g. bugger all i would get them and then have the B18a/b pistons made up at 83mm size and have blank crowns, then have a engine specialist machine the crowns to match our heads. Or just have JE/Wiseco to custom make them to our needs (which would probably be more) But then again doesn't diamond have a pattern for our engines for the Eagle rod size wrist pins?

that would be the best idea get some 83mm b18a pistons and rods...so that would be .030 over on the block

[ZackieDarko]

i have looked or 83mm b pistons but havent found shit

[hondaman1986]

ok the wrist pin from the D is 19 mill. so anyone know for sure what our's is???

[AccordEpicenter]

d series stock rods are junk, used stock a series rods are much better

[ghettogeddy]

d series stock rods are junk, used stock a series rods are much better

but for a low n/a hp build would stock connection rods be fine maybe a good brand name set any suggestions

[hondaman1986]

ok im might be buying aftermarket D rods not stock D rods so if there wrist pins are 19mm what are our's

[MessyHonda]

i have looked or 83mm b pistons but havent found shit

i think they are .080 over that equals 83mm

[rjudgey]

I'm pretty sure there 20mm but maybe U.K. spec engines might be different like the B20A rods our pins are smaller but yours are bigger for some strange reason?
The Rod bolts on stock rods are very strong i've never had one fail and i've even used ones that have allready done 60k plus miles and revved them to 8k rpm, and even when i had two conrods fail and they were getting stuck in the block they just mashed there way through the block without fail i'd say there easily as good as ARP although ARP are cheaper to replace than buying new honda ones!!

I'll try and measure one of my spare rods tonight to check the pin size.

[ZackieDarko]

i think they are 19mm (A20's)..could be wrong

[rjudgey]

If you look at Wisco or JE websites they ahve B18 pistons listed at 83mm

[ZackieDarko]

If you look at Wisco or JE websites they ahve B18 pistons listed at 83mm

so is .20 or .40 83mm for b-series pistons?

Wisco makes 81 and 82mm but they have them in .20 and .40 over

JE makes 83mm pistons part #242879

A20A3 bore/stroke is 82.7mm bore/3.58in stroke

the JE pistons say they are 83mm bore/3.047in stroke

wouldnt this reduce our CR?