Forged rods & stock pistons

[2.0t03speed]

hey guys i was wondering if anyone has done forged rods w/ stock pistons. i know that the pistons would have to be machined to accept the wristpin but is that it? if so i was wondering how much power you made before the stock pistons went. i really just want to max out the stock gt25r have around 250-270 and call it a day but i want to have peace of mind when i do it, hence this thread. any help or info you could give me would be appriciated

[mspHtown]

hey guys i was wondering if anyone has done forged rods w/ stock pistons. i know that the pistons would have to be machined to accept the wristpin but is that it? if so i was wondering how much power you made before the stock pistons went. i really just want to max out the stock gt25r have around 250-270 and call it a day but i want to have peace of mind when i do it, hence this thread. any help or info you could give me would be appriciated


you can make it work. talk to igdrasil (sp?) or juan at hiboost about it. however, if your going to all the trouble to repace the rods, y not spend a little more and replace the pistons as well?

[2.0t03speed]

because im not looking to make that much power just between 250-270

[Alejo_NIN]

subbing, planing on going this route too.

if able to do it...what RODS would you use?

and also, you planning on using NEW pistons or reusing the originals....

thnx

[1moreMPH]

subbing, this has been an idea of mine for quite some time... :)

[Alejo_NIN]

i hope someone who knows the answer can chime in

[mspHtown]

because im not looking to make that much power just between 250-270



if you are going to go through all the trouble of pulling the engine and doing any type of machine work, you oughta just get a set of pistons and not have to worry about them being a weak link.

[Alejo_NIN]

dude, is enough labor and money for some of us to replace that. and it has been said that the pistons are good, the bad thing are the rods.

maybe we won't get away with low compression...but we'll be forged. i'll be happy making 270whp. that's all i want anyways

[1moreMPH]

+1. budget is real tight, and if it's not necessary to replace the pistons, and cheaper to just leave them be, then goodnight.

[Alejo_NIN]

if not replacing the pistons, then maybe, JUST MAYBE there won't be any need to machine the block, if you do a pressure test and it come out good.
maybe just replace the rings..

[terbow]

i know juan does it but it costs more than new pistons and rods (think is was 12-1400) so i dont really see the benefit when u can get stock bore pistons now (im assuming thats the idea so u dont have to machine the block). u can get k1 and weisco for less or equal and its going to be plenty for 300. you do have to machine it to accept the floating wristpin. i dont know if theres any more work to do. if ur doin the labor urself then i can see the savings and it would be worth it, but if ur doin it turnkey id just get all new stuff in stock bore size (as long as ur block is ok to hone)

[Alejo_NIN]

ooohhhh, now we cought TERBOW's attention...now we'll get the issue resolved!

lol
hahaha

j/k m8

[Alejo_NIN]

i know juan does it but it costs more than new pistons and rods (think is was 12-1400) so i dont really see the benefit when u can get stock bore pistons now (im assuming thats the idea so u dont have to machine the block). u can get k1 and weisco for less or equal and its going to be plenty for 300. you do have to machine it to accept the floating wristpin. i dont know if theres any more work to do. if ur doin the labor urself then i can see the savings and it would be worth it, but if ur doin it turnkey id just get all new stuff in stock bore size (as long as ur block is ok to hone)

what you say does make sense.
i would've figured it was less expensive, but i can see why they'll be more expenisve..is not just a matter of taking a drill and making a bigger hole.

good point.

[terbow]

good point.

i know ;)

i actually looked into it myself. i think he started doing it back in the day when we didnt have many choices. in that respect it was a novel idea. but now, as i mentioned we have stock bore pistsons so unless u do the work urself your not really saving.

[terbow]

ooohhhh, now we cought TERBOW's attention...now we'll get the issue resolved!

lol
hahaha

j/k m8

lol

[2.0t03speed]

yea i see what your saying but the price will be the deciding factor for me im going to go price how much it would be to machine the piston to accept the wristpin hopefully i can get it done for free seeing as my bestfriend works at a machine shop

[Alejo_NIN]

yea i see what your saying but the price will be the deciding factor for me im going to go price how much it would be to machine the piston to accept the wristpin hopefully i can get it done for free seeing as my bestfriend works at a machine shop

I dunno about you, but i'd rather have someone who's doing it for the money. They'll be more interested in giving you a quality product. you are talking about machining the heart of an engine...something is misaligned for just 1 mm and you whole thing could go to hell

[2.0t03speed]

not always how many stories have you heard about ppl paying a huge chunk of money and not getting shit/shit quality. but i see what your saying

[terbow]

if ur gonna have ur friend do it i would get a garentee in writing cause if they fall apart u could ruin the whole block / turbo etc. im sure this will be his 1st set of pistons doing this to so u dont really have the resources to do trial and error since ur on a budget. id feel better if u saved up for the right parts so u at least know its made for each other but thats all up to u.

[2.0t03speed]

yea i hear what your saying im still unsure what i want to do yet im still weighing all the options

[terbow]

indeed.

[mspHtown]

lol like i said from the very beginning...

[Speed_Racer]

If its a proper machine shop (equipment wise) and your friend understands the concept of machining the pistons wristpins you'll be fine. If he's never done it before it can't hurt to find a more experienced machinist. hes your friend, use your instincts.

One car I've worked on dyno'd @ 360hp @ 22psi on the stock pistons IIRC. So stock pistons with a conservative tune will be enough for your goals.

[crashkelly]

hey this is probably a question thats been answered before, but like every other msp owner i plan on going forged and wanted to know what the difference between oliver long rods and stock rods are....I mean obviously im guessing they are longer, but how does this affect compression? or does it even affect it?

[Velocifero]

this is the route I am going, just waiting for a deal on rods and money of course. The Pistons will only be the weak link at that level if you have poor fuel management or a bad spark, the pistons will hold the power. Once complete my set-up will be forged rods, megasquirt standalone, 440cc inj, 255 pump, and most likely meth-water injection to keep the charge temp down even further.

only thing I am waiting on is the completion of my MS, we hit a snag on the altenator operation, and the rods.

[terbow]

hey this is probably a question thats been answered before, but like every other msp owner i plan on going forged and wanted to know what the difference between oliver long rods and stock rods are....I mean obviously im guessing they are longer, but how does this affect compression? or does it even affect it?

compression is determined by the pistons, which are shorter to compensate for the longer rod.

[crashkelly]

compression is determined by the pistons, which are shorter to compensate for the longer rod.

ok that was my assumption...but you know what they say about assuming something...it makes an "ass" out of "u" and "me"