Looking for high comp pistons

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SIDEWAYZ

New Member
Messages
19
Location
Burlington, NC
Im hoping to start my build of my early 1uz. Im planning on 11:1 comp maybe 12:1 with some lextreme stage II cams and some itbs. I am building custom headers. This engine will be backed by a W58 trans. Its going in a first gen celica.

My question is, where can i source some 11:1 or 12:1 pistons??
 

SIDEWAYZ

New Member
Messages
19
Location
Burlington, NC
Thanks quik.

Im planning on one from a 90 supra. I dont have any experience with the w58 but i once nade 397whp on a w55 and never had any problems so i was thinking i could expect the same from the 58
 

4U2QUIK

Active Member
Messages
1,186
Location
Modesto california
w58 from a mkiii won't hold up for long. We've blown up enough to start a small collection over here. You might want to look for one from a sc300 or mkiv supra. They are known for holding 400 hp pretty well
 

SIDEWAYZ

New Member
Messages
19
Location
Burlington, NC
Maybe i will attempt to source a r154 from a mkiii turbo then. I made 550whp and 689ftlb in my 88 supra and never had anything but diff cradle problems.
 

Stratoraptor

New Member
Messages
30
Location
WPAFB, OH
I'm also in the boat looking for high-CR pistons. If anybody can recommend a good source, that would be great.

Also as a side question, should I upgrade the rods, too if I am looking for something <400hp?
 

4U2QUIK

Active Member
Messages
1,186
Location
Modesto california
that's funny. Daft innovations 1uz truck has a 98 engine that spins 7800 rpm all day every day. Thr rods will hold fine. Especially if you replace your rod bolts. your biggest limitation will be your valvatrain.
 

Stratoraptor

New Member
Messages
30
Location
WPAFB, OH
that's funny. Daft innovations 1uz truck has a 98 engine that spins 7800 rpm all day every day. Thr rods will hold fine. Especially if you replace your rod bolts. your biggest limitation will be your valvatrain.

Valvetrain is ported, polished, over-sized, sprung, and cammed. I'm feeling pretty good there.

Rod bolts...is it the rod bolts themselves or threading? Would upgraded bolts say ARP keep the rod from lodging itself somewhere it doesn't belong? I don't want to drop $1000-$2000 on a rod kit if I don't have to.
 

krayn

Member
Messages
511
Location
Victoria, Australia
Bolts arnt the problem, its the rod itself, just near the big end. I learnt the hard way.
Your heading into the stage where it snow balls. If you dont change rods you could stuff a set of heads that may owe ya a grand. To do that out comes the pistons. And so it goes on.....
The 98 motor is that a vvti motor?
 

Stratoraptor

New Member
Messages
30
Location
WPAFB, OH
hmm...not really looking for FI. As I said, I want to bump up compression.

Should I be worried about valve clearance if my valves are over-sized?
 

krayn

Member
Messages
511
Location
Victoria, Australia
To get close to 400 hp nat aspirated will require lots of revs. I dont believe the rods are up to that sort of rpm. As for valve clearance, a dummy assembly and plasticine will tell you about valve clearance. Shouldnt be an issue if valve springs are good and not too bigger lift cams.
 
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