[Prototype_MS]

Ok those of you who responded to my last thread know where i stand as far as engine mods but for the sake of finding it I'll post it again...

2002 Celica GT 1zzfe:

255lph Walbro Fuel pump
11:1 Compression Wiseco Piston
Crower Rods
(motor was fully rebuilt w/ all new parts)
DC sports header
Cat Back exhuast
CAI

Ok here's the million dollar question (or in this case $5,000 as thats what the motor cost), is it safe to put 5 to 7psi through a 1zzfe with 11:1 compression if you fully upgrade the head (valves, springs, ect.)? Is it safe at all? This will be a fully stripped race car so make no mistake it doesn't have to be a reliable daily driver but I also don't feel like paying to rebuild it after every race.

Some one with S/C expirience please help. I know the Greddy systems are run on the 2zz and they are stock 11:1 and are safe. Will this also apply to a modded 1zz?

Thanks for the help.

 

[SickCelica696]

You could easily run that. Higher levels too. Swap a nice small pulley on there and your good to go.

 

[Prototype_MS]

Awsome. Like I said before this project is far from over and I will keep you guys posted on the build. Thanks for the help.

 

[SickCelica696]

Awsome. Like I said before this project is far from over and I will keep you guys posted on the build. Thanks for the help.

I could see high turbo boost levels on a fully built 1ZZ, so the supercharger should go over very well.

 

[Boosted2.0]

the only thing you have to worry about on an 02 1ZZ is if your motor is an oil burner. If you are using 1 quart every 2K miles or more then I would rebuild the bottom end before FI

 

[Prototype_MS]

I heard about that and have been running 5w-30 Mobile 1 in it for obvious reasons (aluminum motor basically). But the only problem i have had with it is the rear main leaking. I got another seal just haven't had time to fix it yet. Its got about 2220 mi. on the motor right now and pretty much the rings have all just settled in when it hit 2000 mi. It runs great and makes much more solid horsepower now. You really can tell a difference in the sound and response the motor gives you with the rods and piston combo.

 

[Boosted2.0]

Glad to hear it! When you reseal the rear main be sure to use new crank bolts - that will make sure you don't get oil leaking through there.

 

[Prototype_MS]

I was gonna hold off on doing the repair till I got my hands on a flywheel, clutch and six speed from a GTS.

What do you know about matting the 1zz and six speed?
Do I need a harness connector from the six speed for the speedo ect.?

I know you can mate the 5 speed to the 2zz, so I assume you can go reverse.
I want the closer gear ratio's for use on the road course.

 

[Boosted2.0]

There was a guy with a SF turbo that did a 6speed on his 1ZZ a long time ago - I forget what his screen name was though - if you search you should find info on it.

anyways you should just be able to do a direct swap I would guess. I'm not 100% sure if the shifter assy and cables will get the job done though.

 

[Prototype_MS]

Yea I was kinda wondering about that. I wasn't sure if the parts were the same from GT to GTS or not. I guess I should call toyota and get a part number. That would probably be fastest.

 

[Boosted2.0]

they are not the same part - the GTS shifter and cables have a longer throw due to the Reverse gear spacing - I just can't recall if the 5 speed shifter and cables got it done for that one guy or not.

thats really the only issue though.

 

[exile27]

Which s/c are you planning to run? I just spoke to Matt from monkeywrench yesterday, because I am going to buy a stage 2 engine from them this week. I asked him if I could safely run the trd s/c with the 11:1 pistons. He told me that he recomends that I use the 8.8:1 pistons and use a smaller pulley. The only problem is that most people aren't seeing any gains with the smaller pulley. Also, I'm out in Ca, and we only get 91 octane piss.

 

[Prototype_MS]

Which s/c are you planning to run? I just spoke to Matt from monkeywrench yesterday, because I am going to buy a stage 2 engine from them this week. I asked him if I could safely run the trd s/c with the 11:1 pistons. He told me that he recomends that I use the 8.8:1 pistons and use a smaller pulley. The only problem is that most people aren't seeing any gains with the smaller pulley. Also, I'm out in Ca, and we only get 91 octane piss.

Yea im out in kansas and we get the same. Have to home brew it or buy some jet fuel if we want higher. I was planning on running the TRD. I know you can run the greddy on the GT-S which of course is an 11:1 already so I wouldn't see how this could hurt it. I guess one way of looking at it is you are just putting the motor on edge by using a max boost level (im only going with 5 to 7psi) and using 11:1 compression. I dont think you would want to use a much higher compression than that. My guess is they just want you to use something that is made to handle boost if you are gonna do it. Especially if this is going to be a streetable car. Mine wont be and im not entending it to be.

 

[exile27]

I am planning to use my car as a daily driver, but like you said, guys with gt-s s/c are also running 11:1. And I don't think that a stock 2zz block will be stronger than a built 1zz. Do you think I'll need to go with bigger injectors to be safe?

 

[Jesse IL]

If by strong you mean durable, then yes your engine with forged pistons and rods will be stronger.

If by strong you mean power potential, then a stock 2ZZ will walk all over your 1ZZ. The head design of the 2ZZ is just so far superior.

 

[exile27]

No, I meant durable. I don't need my trix to set any land speed recods. I just want a decently quick, reliable daily driver. Once I have my trix where I want it, then it'll be time to get a real project car :thumbup:

 

[Prototype_MS]

I am planning to use my car as a daily driver, but like you said, guys with gt-s s/c are also running 11:1. And I don't think that a stock 2zz block will be stronger than a built 1zz. Do you think I'll need to go with bigger injectors to be safe?

Im running the Power Enterprises 550cc injectors. I bout some a while back and just had them sitting around. They should be more than enough. But yes you need to upgrade your injectors to larger ones.