Piston Choice okay?

[Kai]

I'm just going for a stock rebuild for my engine - not looking to push insane amounts of power - 300bhp is pretty much all i'm aiming for, and current setup is about stock, with the exception of the 3" elbow back exhaust (with HKS elbow), and no boost increase over the standard actuator.

I found a set of pistons + rings on eBay the other day for $210, but i cant find them at the moment - however i *did* find these:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=014&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=330091449925&rd=1&rd=1

Seems like a bargain, although they look like 100% OEM / Stock Pistons + rings.

I'm going to have the block re-bored to the next oversize anyway, so they'd be matched to the bores.

Opinions, guys? :)

[Bishop92t]

Stock pistons and rings will hold that power easily. Personally I'd chose stock over the eBay set.

[pimptrizkit]

wow those are cheap.,

really makes me curious to how much power those will hold lol

[Dr Evil]

The price of those pistons would scare me into NOT buying them .....as Bishop 92t said : go for stock oem items if 300 is your goal .

[jdub]

Go with your stockers and save the $$$ ;)

[Kai]

Well, i need a rebore to the next oversize - 20 thou should be okay - how much for a set of stock ones? Get them from Mr T?

[Gilsdorf]

Why not kick down an extra $320 and buy some Wiseco pistons? NEVER have to worry about them at that HP level, and if you decide you need more power later, you have plenty of room. Piece of mind is priceless when building these engines.

Matt

[Kai]

Not looking for power, i'm looking for reasonable reliability. Plus, i have a budget to work to. The max i can spend on a set of pistons is about $350 - which is why those looked so tempting. I also have to get ARP's and a set of bearings, headgasket and a few other items...

[Mr.PFloyd]

check the for sale sections here... i think someone was selling a set of .20 over pistons a bit back for a good price. OEM ones too.

[Kai]

Yeah i saw that, but they're USED. I need *NEW*!

[wardog]

The pistons on that link are nippon pistons and rings they cant be that bad for $100 i believe nippon makes alot of import parts there is also a set cryo treated too for about 240 for a little more insurance :evil2: ;

This package includes:
6 pieces of pistons with pins & clips
1 complete set of piston rings
Anodizing piston heads for increased heat dissipation
Premium Steel Material Chrome Piston Rings
Ring size 1.5x1.5x4.0mm, Bore diameter 83mm
Available in Standard size, .020" (.50mm) oversize, and .040" (1.00mm) oversize.
Please specify the size you need with payment

GOOD LUCK

[wardog]

The ebay store is called cnsautoparts they also have a topline oil pump might as well get a new one with the build thats pistons+rings+oil pump for about $250 good luck :naughty:

[Mr.PFloyd]

i wouldn't trust the rings, pistons maybe because cast pistons aren't that hard to make anymore but chrome rings = a no no.

[Kai]

rings i can always get elsewhere - for the price, even if just the pistons are the only thing good, its still a fair deal.

I'm just spoken to his holyness, i need 40 thou oversize, so i shall also be needing an 84mm headgasket - i'm NOT after a metal one, just a standard one will do me - Mr T do them in oversize?

Also - re headbolts, as i understand it, you can re-use them, but is it worth buying just new OEM ones?

Thanks for the heads up re the oil pump, i might get that as well...see how much i can get one for here though - things like Pistons and the like are hard to come by unless you drive a cosworth or some form of ford/vauxhall :D

[Kai]

That oil pump looks pretty good, although...not sure if after shipping, it'd be any cheaper than one from Mr T.

[themadhatter]

use arp hardware to hold the mill togeather you won't regret it in the long run

[Kai]

Using ARP bolts for the bottom end. Top end i'm just going to tick to standard bolts. The budget doesnt allow for more than the most essential expense!

[themadhatter]

in that case i would use arp's on the topend and oem's on the bottom but thats me

[steve_mk3]

ARPS on the top end are essential!
Do not use the OEM headbolts.

[turbotrev]

i have the TOGA HV oil pump which iirc is the topline op, so i say just get an OEM and shim it. b/c the one i have is just a re-badged OEM as i was informed by a mod iirc.

trev

[Mr.PFloyd]

my setup is the best of all worlds. ARP top end, ARP main studs and Toyota Connecting Rod Bolts.

[Kai]

Bottom end i'm more concerned about. As i said, i'm just stock, the most i'll EVER push, is about 350bhp. I can barely use whatever i'm outputting at the moment, and toyota head bolts should be more than adequate as long as they're torqued down to 72lb/ft.

[Mrbaboon]

That said,


If you're considering using a composite HG and NOT going with ARP hardware, we will laugh when your head gasket blows up. Toyota head bolts stretch very easily in comparison to ARP Bolts/Studs.


Its an easy choice to make, your bottom end will be fine with OEM hardware. If you hav'nt been picked up on that by now you should really start reading more.

[Kai]

Er - theres nothing wrong with the stock gasket if you're STOCK. Neither is there anything wrong with the stock bolts, if you're STOCK.

Going for ARP hardware on the top end is all very well if there was any intention of going for power. I realised that the 7M is a flawed design, but at the 72 lb/ft torque for the headbolts, it should be more than adequate. The ones i have on there at the moment are stock and they're fine.

[Doward]

Wait wait wait - you want pistons for under $350?

Look up Probe Industries (I think they were forged slugs for about $350/set!)

[Kai]

Hmm - i'll have a look for them tomorrow :)

[7MGTEsup]

Stock head gasket here, stock bolts at 72 lbs/ft, 12psi boost, 15000 miles and no problems with head gasket. No need for APR stuff on the bottom end at your power goals either. Stock engine from the factory is good for 400hp without any internal mods.

[supradan22]

I would still go with ARPs all the way arround for that little assurence but if your budget doesnt allow it just get the topend.

[pimptrizkit]

Wait wait wait - you want pistons for under $350?

Look up Probe Industries (I think they were forged slugs for about $350/set!)

just talked to him, their looking to be about 404.84 after tax and what ever else, and they are still waiting on the forgein to be completled, said some thing about expecting time around may or june..

[Kai]

Works out to about £210, assuming i have to pay US sales tax. And thats excluding shipping. Not too bad....

[steve_mk3]

Er - theres nothing wrong with the stock gasket if you're STOCK. Neither is there anything wrong with the stock bolts, if you're STOCK.

Going for ARP hardware on the top end is all very well if there was any intention of going for power. I realised that the 7M is a flawed design, but at the 72 lb/ft torque for the headbolts, it should be more than adequate. The ones i have on there at the moment are stock and they're fine.


OK- you really need to do some reading on the stock bolts and why you DO NOT WANT TO USE THEM and you certainly do not want to re-use them.

The only reason I am posting this is so that somebody else readiing this thread doesn't go away with the idea that reuseing stock head bolts and torqueing them to 72 is acceptable.

[Kai]

Okay - numerous times i've been told that there is NOTHING WRONG with using the stock bolts on a STOCK engine - like mine. ARP's are a waste of money for me and i just need the engine to RUN NORMALLY. I'm not boosting every day, i'm not out for more HP yet - when i am, i'll use ARP's - til then though, i'm sticking with a set of new, stock headbolts.

Anyway - back to the pistons.

They arrived this morning with the set of rings - well packaged, and they look rather like this....

http://kai.robinson.free.fr/dropbox/Supra/pistons1.png

Standard cast slugs - ceramic coated tops - they look decently made - the casting marks read "TEIKIN" if that means anything to anyone.

Should be installing these pretty soon.

[Kai]

And heres the whole set of stuff i now have - as taken by my lovely new Digital Camera :)

http://kai.robinson.free.fr/dropbox/Supra/rebuild-stuff.png

[ViR2]

it should be nice stock rebuild, if its your DD and you dont push it hard every day, then why not. Every item will do its work with no problems ;)

[Kai]

Yup - apart from the HKS T16 Turbo back system (with replacement elbow), Blitz Dump Valve and K&N Panel Filter (not an induction Kit), thats the extent of the mods, and will be for the forseeable future.

[Stu_22]

The sump doesnt use a gasket it needs a type of silicone sealant for engines

[7MGTEsup]

^^^^ what he said, DO NOT use the cork sump gasket it will only leak (ask me how i know) I'm going to be wipping my engine out soon to fix that pesky oil leak.

[Koenigturbo]

I'm with Bishop