pistons question

[mitsufrkr]

ok i got my hands on a 6bolt complete block i want to build it,to be able to handle 20 to25lbs of boost . i was thinking of going with the stock rods and 2g pistons but notsure if that will work. any advice would be helpfull.

 

[anconover]

you dont build a motor to handle 20-25lbs of boost for starters. A stock motor will handle 20-25lbs of boost on a 50trim all day. Every turbo will make a different amount of power at 20-25lbs of boost. If you arent planning on exceeding 450whp which it doesnt seem like you would be, dont need to do anything more than a stock rebuild IF IT NEEDS IT.

 

[eyebrowski]

you dont build a motor to handle 20-25lbs of boost for starters. A stock motor will handle 20-25lbs of boost on a 50trim all day. Every turbo will make a different amount of power at 20-25lbs of boost. If you arent planning on exceeding 450whp which it doesnt seem like you would be, dont need to do anything more than a stock rebuild IF IT NEEDS IT.

I agree with everything you have said. But if you are rebuilding it you might as well upgrade to 2G pistons since you have it apart and they are cheap.

 

[MNGSX]

By the time you do 2g pistons and get your 1g rods resized and modified you almost could have bought eagles and wisecos.

So buy eagles and wisecos..

Get a gasket kit. Topline ?

OE head gasket

Clevites

 

[1fast97gsx]

By the time you do 2g pistons and get your 1g rods resized and modified you almost could have bought eagles and wisecos.

So buy eagles and wisecos..

Get a gasket kit. Topline ?

OE head gasket

Clevites

yea what he said ... unless you can get 2g pistons for like $20 ... machining is almost $100 for the rods to work with the pistons.

 

[anconover]

machining the rods should be more around 50$, but still really not worth it IMO unless u get the 2g pistons dirt cheap. Id stick to OEM unless u plan on making in excess of 400whp.

 

[mitsufrkr]

thanks guys i will stick with the 6bolt rods and 2g pistons. now i need some advice on the head should the stock head work good on that kind of set up or should i go with a bigger set of cams i would like it to idle well too.

 

[anconover]

try the search button.

 

[eyebrowski]

By the time you do 2g pistons and get your 1g rods resized and modified you almost could have bought eagles and wisecos.

So buy eagles and wisecos..

How does $150 (max) compare to $800?
I wouldn't go putting wisecos in any street driven car that is not planning on making over 500 HP anyway. 2G pistons will be more street friendly.

 

[MNGSX]

:laugh: :laugh:


Want to run the most boost for the least money?

Stick with the 1g pistons re-ring... Lower comp ratio will tolerate more boost than a 2g.. Assuming the bores are'nt tapered bad or crooked.. Still not a proper high power rebuild.

If you are buying new oversize pistons..

http://www.diamondstarmotorsport.com/engineparts.shtml

95 Pistons with Factory Ring Set $285 - Bore - Stock +.5MM (.020") +1MM (.040")

6Bolt rods will require machining for fit 2G pistons.


$50 rod work... Lowball = $200 (no resize or ARP install)

So $485 ~ $500



Eagle-Wiseco$763

$263 more + much stronger + ARP + = BALANCED Engine.....

Wisecos are very close piston to piston in weight (+light).... All a aftermarket rods worth buying are weight matched in sets and have ARP hardware.

That is alot for $263....

 

[eyebrowski]

:laugh: :laugh:


Want to run the most boost for the least money?

Stick with the 1g pistons re-ring... Lower comp ratio will tolerate more boost than a 2g.. Assuming the bores are'nt tapered bad or crooked.. Still not a proper high power rebuild.

If you are buying new oversize pistons..

http://www.diamondstarmotorsport.com/engineparts.shtml

95 Pistons with Factory Ring Set $285 - Bore - Stock +.5MM (.020") +1MM (.040")

6Bolt rods will require machining for fit 2G pistons.


$50 rod work... Lowball = $200 (no resize or ARP install)

So $485 ~ $500



Eagle-Wiseco$763

$263 more + much stronger + ARP + = BALANCED Engine.....

Wisecos are very close piston to piston in weight (+light).... All a aftermarket rods worth buying are weight matched in sets and have ARP hardware.

That is alot for $263....

If you are buying new then yes it probably isn't going to be much of a cost difference between the two options. But there is nothing wrong with using a set of used 2G pistons that are in good shape. $200 for rod machining is steep, last time I had it done it was $75 for all 4 of them. But still...I would not use those forged pistons in a car that wasn't planning on making lots of power.

 

[MNGSX]

If you are buying new then yes it probably isn't going to be much of a cost difference between the two options. But there is nothing wrong with using a set of used 2G pistons that are in good shape. $200 for rod machining is steep, last time I had it done it was $75 for all 4 of them. But still...I would not use those forged pistons in a car that wasn't planning on making lots of power.

I would wiseco has offset wrist pins to reduce slap. Get a good machine shop to set the piston wall clearance. Then they are completely streetable...

I did't rebuild the engine in my moms van w/o using oversize pistons... Just a driver for a parapelegic... Fresh, straight, accurate bores do other things like make an engine last longer (even non performance), reduce oil burning and improve fuel economy.

So either do a comp/leak test and leave it alone and wail on it for a while or tear it down and do it right for some chump change as compaired to 1/2 ass..