20v rods and pistons weights and strengths wanted.

[Grrrrrrr!]

Looking at a performancve 20v build and dont have an accurate set of scales around, wondering if anyone knows the following:

weight of the standard Silvertop 20v pistons with pin.
ditto for blacktop and any aftermarket pistons out there
eg
ACL forged 20v pistons, piston weight: 284grams, pin weight 75 grams.


And rods: weight and if anyone has any idea how much they strecth at 9000rpm or a modulus of elasticity that would be bloody brillant. again, for silvertop and blacktop and any aftermarket items

Dont want to get the block decked and end up with pistons hitting the head.

[Mr Revhead]

well why bother with the blacktop rods? if you want 9000rpm you cant use them as they cant handle that for long

[crnkin]

im pretty sure the weights are on club 4ag tech section somewhere....

and yeah, blacktop rods over stock power/rpm isnt a good idea, silvertop may be ok but probly not, go for alloy billet like crower maybe? i think they make them anywhos. Im assuming NA application here, which is why your asking about weight.

[Mr Revhead]

prepped silvertop rods are fine for 9k
in fact stock ones are fine for a street engine taken to 9 occasionaly

[crnkin]

where can i get my rods prepped for a good price mr revhead? approximate cost?

major thread hijack

[Mr Revhead]

ring around, havnt been here long enough to find out all the places!

but i think there would be many many places who can do it

[crnkin]

oh sweet, i just thought you had already found a good place.

as you were

[Grrrrrrr!]

I'm going to gather as much data as i can before i decide which rods i use, budget unfortunately is a factor, at least until i win 17mil in powerball next week

How many people have had blacktop rods fail on them?

[Mr Revhead]

how many ppl had black top rods?

pretty much every one whos tried to run them over 8500 for any length of time!

[AceSniper]

yea dont use blacktop rods ull just punch holes in the block, stock rods in my old silvertop used to see 9k alot... maybe to much with out fail an it still lives

[Grrrrrrr!]

Hmmm, and how long will blacktop rods last if the pistons are 10% lighter than stock?

[AceSniper]

prolly just as long lol, get a blacktop an silvertop rod place them side by side an you will get your answer

[Grrrrrrr!]

I'm actualy looking more at the idea of blacktop pistons (or aftermarket pistons) on the silvertop rods.

But i figured having the info here would be useful for anyone else considering upgrading.

[Mr Revhead]

thats what il lbe doing

[AceSniper]

yeap silvertop rods would make a much more realiable blacktop, I have a set for mine to do.

[Grrrrrrr!]

cool, so while you have everything in pieces weigh them and take photos then post them here, email them to me or put em up on your very own web page for all to look at

[matt dunn]

So what do you want?

Piston weight with or without rings? Gudeon pins?

And rods with rod bolts in them? what about bearing shells?

I dont remember the weights, but I did weight them all a wile ago to compare and see what the diference's are within a set,
and they were next to nothing. The Scale I used was a paint scale and accurate down to .01 gram.

Matt

[Stealer Of Souls]

Blacktop rods are around the 508g mark. Accurate to 1g only unfortunately.

[Grrrrrrr!]

So what do you want?

Piston weight with or without rings? Gudeon pins?

without rings, pistons and pins seperately if possible, but if you weighed them with the pins in them its all good. if the rings were on there thats cool, just specify that.

And rods with rod bolts in them?

Again, however you weighed them is fine, just specify if the bolts (and what sort - std toyota, arp, whatever) were in them.