wiseco pistons

gse_turbo · Post by **gse_turbo** » Sat Jan 19, 2008 11:10 pm

perhaps some people haven't see it yet because I put it in the wrong section but I'm trying to get a group buy of sorts going for Wisec pistons...

check out this link WISECO PISTONS FROM DAFT ART

Nubira2.2 · Post by **Nubira2.2** » Sat Jan 19, 2008 11:19 pm

how much HP can handle wiseco pistons + stock rods?

gse_turbo · Post by **gse_turbo** » Sat Jan 19, 2008 11:27 pm

these pistons are being built to handle 25psi, quite a bit more than most will ever see bit well worth it.

it's hard to say, there are guys with 230-250hp here in the Americas and 300+hp in the UK with completely stock internals.

the ONLY time I've ever seen these rods fail is if they are hydralocked.

the part that would fail first is the rod bolt. if you did the pistons with OE rods and ARP bolts you should be safe well into 300hp and beyond.

Pir0 · Post by **Pir0** » Sat Jan 19, 2008 11:28 pm

On stock rods you wouldn't be looking at big big numbers, i've heard too many storys of rods snapping and throwing a piston out the bottom of the block. You'd be best getting better rods etc aswell if you're looking at big numbers

gse_turbo · Post by **gse_turbo** » Sat Jan 19, 2008 11:30 pm

that is true but like I said its the rod bolts that fail causing the "throwing" of the rods

Pir0 · Post by **Pir0** » Sat Jan 19, 2008 11:33 pm

That's really useful to know. Didn't know that. These are brilliant pistons, if i were ever going for a new set in the future for a turbo'd motor, i'd go for wiseco ones, i'd definatly upgrade the rods and bolts just to be safe though

Post by **Efratech** » Tue Jan 22, 2008 1:45 pm

gse turbo, remember that X20's rods are thiner than the XE/LET

gse_turbo · Post by **gse_turbo** » Tue Jan 22, 2008 7:01 pm

+1 very true, the X20-16v's are the same as the C20-8v's but as LacettiGT and Existence has illustrated they are holding up well under heavy boost. after all Existence is on a T04B!

exist3nce · Post by **exist3nce** » Wed Jan 23, 2008 12:58 am

gse_turbo wrote:+1 very true, the X20-16v's are the same as the C20-8v's but as LacettiGT and Existence has illustrated they are holding up well under heavy boost. after all Existence is on a T04B!

Are my rods the same as X20XEV? I seem to remember Chris (precisionboost) saying its unknown what rods/pistons the motor has or how much power they would take.

LOL I actually want to try something larger now than the T04B, but budget doesn't allow for it if I'm going to continue with my other plans.

gse_turbo · Post by **gse_turbo** » Wed Jan 23, 2008 1:18 am

exist3nce wrote:
gse_turbo wrote:+1 very true, the X20-16v's are the same as the C20-8v's but as LacettiGT and Existence has illustrated they are holding up well under heavy boost. after all Existence is on a T04B!
Are my rods the same as X20XEV? I seem to remember Chris (precisionboost) saying its unknown what rods/pistons the motor has or how much power they would take.

LOL I actually want to try something larger now than the T04B, but budget doesn't allow for it if I'm going to continue with my other plans.

they are the same as the XEV, and the same as the 8v's. the only thing thak is really unknown is if/how they change smelting/casting practices from the early 80's to now. that and where the braking point is (hp wise).

usually when people are building bigg hp the swap rods right away. but like I've said before, usually when a rod brakes its the bolts that go first. SO EXISTENCE GET ARP ROD BOLT!!!

Post by **PrecisionBoost** » Wed Jan 23, 2008 2:45 am

I'm curious about what Lacetti GT used..... he says he uses stock GM parts but last time I checked there was no such thing as 7.5:1 compression..... and he states that his MLS gasket is the same thickness.

I kind of wonder if he threw in some 2.0L rods with some higher compression pistons.... never did get around to figuring out the effective comp ratio with the shorter rods inside a 2.2L block (which has a taller deck height...think it was a 10mm difference ).

There is definitly a noticeable difference between the C20LET rods (of which I have a set) and the stock T20SED and T22SED rods.

Here are the C20LET rods (not a very good picture)... can't find my T20SED and T22SED rod pics..... might have to try out my new 12.1MP camera

http://upload6.postimage.org/40438/photo_hosting.html

I don't know where the breaking point is on the stock T20SED/U20SED rods but yes.... the rod bolts are definitly a weak spot.

Also keep in mind that RPM is more important than boost when it comes to creating stress on rods..... you have to remember that during the power cycle the force down on the piston is opposed by the deceleration of the rod as it approches BDC

Some would disagree but boosting the car really doesn't add that much more to the stress of the rod..... you put far more stress on it by upping the RPM by 1000 or more.

Most of the time guys throw a rod it's because they misshifted and over reved the engine ( I'm sure many are embarased and make up other stories)

Anyways....... I do have a set of debeamed and polished C20LET rods if someone wants to pair them up with the Wiseco pistons being sold here.... not sure what they are worth... I'd have to dig up what I paid for them.

gse_turbo · Post by **gse_turbo** » Wed Jan 23, 2008 5:44 pm

thanks Chris...

I'll take a picture of mine and post it tomorrow.... hhmmm I think there is one somewhere on the forum.

PM us know what you want for them I'm always interested in another set.