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Thread: bore measurements
01-28-2006, 01:56 AM #1
what would be the correct size if you were to want to run a 11.0:1 compression ratio
piston?83 Toyota Supra RIP. BMX POWER.
01-28-2006, 01:58 AM #2
in a1jz..sorry.83 Toyota Supra RIP. BMX POWER.
01-31-2006, 04:04 PM #3
What a vague question. Do you mean what dome size, what bore size, or what?
Your compression ratio will be an aspect of the combustion chamber volume, head gasket volume, and cylinder volume with the cylinder at BDC compared to the cylinder volume with the piston at TDC.
I believe the IS300 2J has 11:1 compression, which I would thing you could use, but I may be wrong. Why would you want high compression in a turbo motor anyway?
01-31-2006, 05:25 PM #4
Pick up a repair manual..and spend some time reading it. Also, why are you asking this question...you will never have a 1j in your car....never.
01-31-2006, 07:50 PM #5
Because remarks like that make me wanna prove you wrong...It can be done so why not inform yourself about it from the people who have done it. Obviosly it wont be done tomorrow but its on my list of projects right next to my Sr20Det John Deere lawnmower.83 Toyota Supra RIP. BMX POWER.
02-01-2006, 02:59 AM #6
Do you REALLY want to run a 11.0:1 CR in a 1JZ-GTE?????? Do you REALLY want your motor to go KABOOM?????
There ARE reasons why peeps run much lower compressions in our M/JZ series motors in a turbo application.....Chris Eng
1981 MA47 Silver Metallic 5ME Automatic
1985 MA67 Super Deep Red 5MGE 5-speed
Member PacNW Supras/www.celicasupra.com
Quote from Popular Science
Despite the constant physical and--judging by the twitchy, panicked expression--mental punishment inflicted on him by Dr. Bunsen Honeydew窶冱 experiments, Beaker keeps coming back for more. Clearly the Jackass crew grew up ingesting a healthy dose of these Muppet Show regulars.
02-01-2006, 03:26 AM #7
I'm on crack? I just wanted to here from the folks who had done it, thats all...83 Toyota Supra RIP. BMX POWER.
02-01-2006, 09:44 AM #8
I have a 1J in my car. If anything, I would put maybe lower compression pistons (slightly) or the same compression, just stronger and lighter. A high compression turbo engine, though they can work, is more risky to detonation, and you'd have to run the timing so far in retard that you'll lose power through timing to make up a little more from cylinder pressure. Why not just run more boost into the 1JZ's current bottom end? Look at my my, stock bottom end, stock top end, only intake, dp, exhaust, fmic, stg3 clutch, and boost at 16psi and I'm running mid 12's. I can spray into the LOW 11's easily, or get a bigger single turbo and boost the crap out of the motor and make 550rwhp....pretty easily (of course I don't have the money for that right now....just making a point).
Let me ask you, what are you trying to gain from 11:1 compression?
02-04-2006, 02:35 AM #9
jared you need to learn more about the relationship between boost and compression, fuel, ratios. Then get to a 1jz. also hopping into a high horsepower mk2 and trying to use it as a daily driver right away is not reccomended. I would build up to it first. I have been thinking about a 1jzgtte/standalone for my new mk2. I will first get used to a 6mgte first. So jared you need to read alot about this dig up old posts and then come back with the real fuel ratio you want. At that time we all will know you have done your homework and we will help you with the next step.-Large Larry
94 BMW 3 series (black) 84 P-Type (Stolen) (2 Tone Bob S. blue) one owner mint
85mk2 6mge, Rabid Chimp 6mge, 62mm throttle body(Broken) , 7mge clutch Cover, Act Ceramic 4-PUCK, stainless steel braided clutch line, Rabid Chimp 2.5" cat-back exhaust .(sold)83mk2,mk3 (Rip now currently pop cans)
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