90mm piston with stock rods

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90mm piston with stock rods

Post by rtm240sx » Tue Nov 30, 2010 1:46 pm

Would a 9.0:1 90mm piston be to much of a load on the stock pistons. Because of the larger bore? Sounds like a stupid question, but I have been wondering all week?
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Post by TinyT » Tue Nov 30, 2010 1:49 pm

im gonna go with no, it will be fine. what kind of pistons though? if your going forged might as well get some h beams
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Post by z240xs » Tue Nov 30, 2010 4:50 pm

agreed, it is a smart move to go forged and it takes less time since your gunna be there already
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Post by rtm240sx » Tue Nov 30, 2010 5:03 pm

wiseco so yeah there forged. I was thinking of just getting the rods shot peened since im only looking to make 250-300hp.
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Post by eazye2000 » Tue Nov 30, 2010 6:32 pm

I think it's worth the sub 300 bucks it's going to cost for some Eagle rods for some added protection. One hiccup, and those stock rods will bite the dust at 300hp.
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Post by rtm240sx » Tue Nov 30, 2010 7:38 pm

I know I did my research. I know its not the best choice but but it should do. And I am only looking at boosting 7-10psi I dont think i will even put out 300.
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Post by TinyT » Tue Nov 30, 2010 7:50 pm

why even get wisecos then
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Post by tom550 » Tue Nov 30, 2010 9:09 pm

if you did do your reaserch you should know people push 300+ on stock internals.
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Post by rtm240sx » Wed Dec 01, 2010 5:46 am

That was not the question, The question was could stock rods handle the larger load from a larger piston such as 90mm
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Post by supakat » Wed Dec 01, 2010 5:59 am

just build the bottom end. you wont regret it. dont half @ss the build and have to tear it open again down the road because you want 500hp. do it right the first time. measure twice cut once.
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Post by Jmcc » Wed Dec 01, 2010 6:18 am

rtm240sx wrote:That was not the question, The question was could stock rods handle the larger load from a larger piston such as 90mm
i don't see why not. im getting wisecos also but i getting rods cause im going 400whp.

i mean why you going to bore it over if dosn't need it. your gunna have to have the block checked
before you bore to make your gunna have a nice straight bore. and to also make sure
you wouldn't need another block incase its that far out of wack.

if you really don't want to buy rods don't buy pistons. just get the block honed and gap some new rings and run it like it is. cause whats really gunna piss you off it if that damn rods snaps their goes you $300 pistons. that you could have spent some where els.

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Post by Jordan Gladman » Wed Dec 01, 2010 9:40 am

If you're going through the trouble of having your block bored and you're spending the $500+ to get forged pistons, you'd be crazy not to spend the extra $200 and get the rods.

Pistons alone are $550-600 shipped, you can get piston/rod combo's on ebay for $750-800 shipped. IMO you'd be crazy not too. If your power goal are what you say, then dont even bother with pistons. It makes no sense to upgrade 1 and not the other IMO.

But to answer your original question, you'll be fine. I ran CP pistons on stock rods, as far as I know that motor is still going somewhere too and its been 5 years. This was before Eagle rods were only $200 though, only other option was $800-$1000 for rods at that time.
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Post by supakat » Wed Dec 01, 2010 10:09 am

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Post by tom550 » Wed Dec 01, 2010 11:24 am

why do you want to just get pistons?
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Post by rtm240sx » Wed Dec 01, 2010 1:37 pm

Jordan Gladman wrote: This was before Eagle rods were only $200 though, only other option was $800-$1000 for rods at that time.
Where can I find eagle rods for $200?
tom550 wrote:why do you want to just get pistons?
I want to replace the weakest link which would be the pistons since the piston landings are usually the first thing to fail. Plus it comes down to money in the end I dont want to half @ss it but when I am only looking at around $1000 spending limit on just the motor its hard to determine what you to spend that money on. I already have
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Post by TinyT » Wed Dec 01, 2010 2:07 pm

welp good luck man. were just trying to make your life easier. id wait on the motor and just do rods when u have the money. 300hp is gonna get boring fast
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Post by rtm240sx » Wed Dec 01, 2010 3:09 pm

300hp way better than what i have now prob 120 to the wheels.
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Post by TinyT » Wed Dec 01, 2010 3:26 pm

well duh. but after 3 weeks of that ur gonna say ****, i wanna turn the boost up. wish i had rods, oh well ill just turn it up anyway, oh ****, whats that sounds, why did my car just blow up, dammmmmm my new pistons, if only i had listened to all the guys on ka-t and spent a few pennies and bought rods. ohh well now im screwed and gonna sell my junk and buy a ford and live a mediocre life. :D
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Post by rtm240sx » Wed Dec 01, 2010 3:55 pm

Jordan Gladman wrote: This was before Eagle rods were only $200 though, only other option was $800-$1000 for rods at that time.
Where can I buy them for$200? And im not dead set on not buying a set of eagle rods yet. If I have the money after I get everthing.
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Post by supakat » Wed Dec 01, 2010 4:42 pm

TinyT wrote:well duh. but after 3 weeks of that ur gonna say ****, i wanna turn the boost up. wish i had rods, oh well ill just turn it up anyway, oh ****, whats that sounds, why did my car just blow up, dammmmmm my new pistons, if only i had listened to all the guys on ka-t and spent a few pennies and bought rods. ohh well now im screwed and gonna sell my junk and buy a ford and live a mediocre life. :D
This is what exactly happens. You race a car and lose by a little and want to turn boost. But wait you can't because you know the limits of the motor. But then aggression and testosterone takes over you similar to how pu$$y makes people stupid and your stuck on the side of the road waiting for a tow truck. Now if you have listened to us, you would have a solid bottom end that would take 500hp and left the other guy saying d@mn, that is one fast ka-t. I seen it happen with an evo and a vette. Evo turned up boost and boom.

I just over boosted on my other block about a month ago and the power i felt was great. I felt my pelvis bone sink into the seat. I dropped in another motor with 7psi with a t3/t4 60-1 for now and don't feel that insane power. So now the link for $715 is gonna be my job to get by the spring and build the bottom end.
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Post by rtm240sx » Wed Dec 01, 2010 5:08 pm

Well im not that type of person. And im not going to run a boost controller just running the evolution turbonetics wastegate right off the turbo compressor.
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Post by supakat » Wed Dec 01, 2010 5:16 pm

what spring are you going to use?
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Post by tom550 » Wed Dec 01, 2010 6:09 pm

you say you dont want to half A word it. but then you say you dont want to save a small ammount of money to do it right. just wait a couple weeks get some extra cash and get the rods. i garentee you wont regret it.
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Post by rtm240sx » Wed Dec 01, 2010 6:31 pm

7lbs spring. and I will prob end up buying a set I never said that I wasnt the original plan was to use the stock rods.
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Post by supakat » Wed Dec 01, 2010 8:24 pm

u will need to change it to the 7lb spring...comes with the 9 installed and a 5 and 7lb separately...
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Post by tom550 » Wed Dec 01, 2010 10:15 pm

supakat wrote:u will need to change it to the 7lb spring...comes with the 9 installed and a 5 and 7lb separately...
what? did i miss something?
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Post by supakat » Thu Dec 02, 2010 6:01 am

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Post by tom550 » Thu Dec 02, 2010 6:58 am

oh ok. i got it now
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Post by Jordan Gladman » Thu Dec 02, 2010 9:01 am

rtm240sx wrote:
Jordan Gladman wrote: This was before Eagle rods were only $200 though, only other option was $800-$1000 for rods at that time.
Where can I buy them for$200? And im not dead set on not buying a set of eagle rods yet. If I have the money after I get everthing.

Ebay link above. $710 shipped for pistons and rods. You have to buy both to get a good deal. I needed new pistons after shipping and everything, pistons alone were almost $600, if I had got this combo the rods would have been an extra $100-150. As far as I know no one sells the rods alone for this cheap, its kinda like trying to buy 1 shoe. You have to buy a pair to get the right price.
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Post by sdaigle240 » Thu Dec 02, 2010 11:05 am

i see them for 300-320 on ebay.

i also have two friends running stock rods on forged pistons, at 18 and 20psi. one did so b/c 5 yrs ago rods were loot, and the other spun a bearing and toasted an eagle and just put stock back in. its 300$ dude, this is silly.
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