Has anyone thought about or tried considering the 11 compression pistons ZPI has to offer?

I know its just a small increase but has anyone looked into these or are there a reason its rarely talked about?

I was about to get them but put the money to a CF hood first ^_^.

 

I don't think getting pistons would be one those "quick bolt on" kind of mods. That's probably why barely anyone has them (if at all). Especially for a "small increase" as you say.

 

its alot of work to do for small gain
i plan on it, just once i get something else to drive while the tC is down

 

I think one person has them and stated they have 168whp N/A.

Ill see if I can find the thread.

 

i had 166whp with I/H/E
if thats all he has is the pistons, thats some gain

 

if you find the post, let me know. That is an interesting claim. Seems a little much, but man would that be worthwhile.

 

here's the discussion thread from ZPI's forum:

http://www.zeropointindustries.net/f...hread.php?t=78


here are some of the posts on that thread.

Nester
"I don't have the sheets with me to post, but I believe the car made about 40-45 whp over stock with the 11.1 pistons, stage 1 head, and an emanage.

This is on stock header, s-pipe and exhaust. He could probably break 200whp with simple exhaust mods."


ZPIRacing
"Yes the car made a peak 45 whp on 100% stock exhaust...the only mods are weapon R intake, ZPI stage 1 head, ZPI stage 1 short block 11.1"

"...As far as the power levels I am confident a stage 1 block, head, and supporting mods..ie exhaust, header, s-pipe, emanage etc...will yield you 200whp of not more.."


fugitive
"ZPI told me that I made 168 WHP and matching torque (I haven't seen the DYNO results personally)
You can REALLY feel it die off at around 5600+ because the head is pushing more than the stock exhaust can handle
Getting an s-pipe and a catback would resolve this problem and probably put me to 200 WHP"

 

ok, but keep in mind the head puts 28whp alone
so do the math

 

With my little known knowledge....

Say you know someone who works at toyota that would be willilng to put the new head and pistons in. Worth the while?

Seeing that most tc's have I/H/E mods i guess breaking the 200whp barrier isn't to hard ^_^?

There is a $700 FULLY REFUNDABLE core charge on this item. Once you have installed the new Stage 1 head, send back your stock cylinder head, and we will refund the core charge. If you have already shipped your core, please select that option. You will not be charged the core charge, but the purchase will be subject to verfication.

Quoted from ZPI does that mean you pay 595 for the head first then another $700???

Do you basically send off your old head when the new one comes in or you send yours off to get w/e.

If you dont have a E-Manage or Fuel controller so to speak will gains still be expected?


If you dont get the stage 1 head can't you just slap the 11:1 compression pistons in?

 

This piston and headers are really confusing me because I'm getting the Turbonetics turbo and I wonder if both of this part will handle the turbo that I put more than 300 horse. I planning on leaving it alone but years later that I'll be working for toyota and I might change alot of things to pull up more horse. I bet there will be a newer parts that would fit the N/A and TC.

 

You can do either way, one: you can order the 700 dollars header and replace the stock header and send your stock header to get some refund back to make it like you pay 500 something. two: talk with ZPI and let them know that you want the stage 1 header and that you are sending your stock right now then they will wait til they recieve your stock header then they will send the stage 1 header to you for just perfect 500 something. I dont know the excat price but I wouldn't mind getting this to improve my horse.

 

i see pistons as a nescesity mod, like a clutch.

 

if you know a tech who works for Toyota, it would be cheaper to have him do the work than pay a shop to do it.
You can put just the pistons and not do the head
the head package is $525 IF you send your stock head in for core exchange
otherwise, your paying $1225 for the head package
I found totalled tC and took the head off (along with other parts) so i do not have to send my stock head back, just incase something does go wrong.

Diablo, if your getting turbonetics kit..do not waste your time putting the 11:1 pistons in, they have another set of pistons for turbo'd setups

 

yup, scionbandit is correct

if you go turbo you want low compression

n/a -high

 

yupyup

 

Really? I thought high would be good. This is new to me. Where can I find a better piston for turbo setup and which is the best compression for Turbonetics Turbo? Can I get the stage 1 header and turbo piston together or is the stage 1 header for N/A? I'm just want to be prepare in the summer to get all in one.

 

I was confused all along and now realized the compression. Is 8.5:1 the best compression for Turbo? or do you guys found a better turbo setup for Turbonetics.

 

8:5:1 is ideal for big boost applications.

 

ZPI sells pistons/short blocks for N/A and Turbo Scions

 

yeah, you definitely want low compression pistons for boost. The turbo alone adds to an effective compression in the cylinder as the air is being compressed in there by the turbo or the supercharger. So if you increase the compression of the cylinder AND add boost, it COULD be a recipe for disaster. You want to lower the compression to allow the turbo or supercharger to create the compression needed in the chamber without making you more prone to detonation from extreme cylinder compression.

Does that make sense? I feel I was talking in circles...