4g64 Pistons & boost capacity

[TimDSM]

Hey guys, my car is not going to sell and my lust for power is limitless, so I decided that I would do the only thing that I could; swap a 4g63 head into my car and then turbocharge it. I've been researching this extensively and I have a few questions that I hope you guys will be able to assist me with. From what I've read, the 4g63 and 4g64 share the same rods and a variety of other parts, but what I'm curious about are the pistons in the 4g64. Are they the same as the 4g63? If not, are they stronger? Weaker? In other words, what capacity to hold boost do they have in reference to the 4g63 pistons? I've noticed a lot of people change their pistons to aftermarket ones when they swap a 4g64 block into their 4g63t, so first impression is that the 4g64 has weaker pistons, but these results are skewed I believe. Most people who do this already have extensive mods and are running at least 20+ psi, so I'm not sure whether the pistons are weak or whether people just see it as a good opportunity to modify the engine internals for extremely high levels of boost. Which one is it? Basically, what I'm trying to discover is how much boost potential the 4g64 pistons have.

Any help is appreciated!


-Tim

 

[thekellbeast]

I think most people who run 2.3's, run more power than even the 4g63 pistons can handle. And I don't think the 4g64 has the best compression ratio for FI to begin with.

 

[Enraged78]

If the 4G63 and 4G64 do in fact share the same rods, I would be worried about those as much as the limits of the stock 4G64 pistons. Think of it like this, you've already begun to lust after power by converting your 4G64 to turbo. Do you really think it's going to stop there? I'll tell you from personal experience that it's not. Boost is addictive, and more boost is more addictive.

A set of Eagle rods are very price effective, the exact same amount would be spent on a set of new machined 1G rods. Ross pistons are also very price effective, and only cost about $100.00 more than a new set of 2G pistons, which you'll need anyway if you're going to freshen up the motor. Both are forged, and can take almost whatever you could throw at them. The limits of Eagle rods seems to be in the 6-700 HP range, and the Ross's go for about the same. I don't know of anyone that's ever broken an Eagle rod due to too much power. Maybe someone here could attest to this.

Do it once, do it right.

Matt.

 

[TimDSM]

If the 4G63 and 4G64 do in fact share the same rods, I would be worried about those as much as the limits of the stock 4G64 pistons. Think of it like this, you've already begun to lust after power by converting your 4G64 to turbo. Do you really think it's going to stop there? I'll tell you from personal experience that it's not. Boost is addictive, and more boost is more addictive.

A set of Eagle rods are very price effective, the exact same amount would be spent on a set of new machined 1G rods. Ross pistons are also very price effective, and only cost about $100.00 more than a new set of 2G pistons, which you'll need anyway if you're going to freshen up the motor. Both are forged, and can take almost whatever you could throw at them. The limits of Eagle rods seems to be in the 6-700 HP range, and the Ross's go for about the same. I don't know of anyone that's ever broken an Eagle rod due to too much power. Maybe someone here could attest to this.

Do it once, do it right.

Matt.

Thanks for the tips. I'd love to swap out the rods and pistons, but that would cost at least $6-700, if not more. As a poor college student, that would put a serious dent in my wallet. I have more than enough funds to do it, but I have no idea how to change rods and pistons. Is it a task that I'd have to get a shop to perform or one that a person who knows how to do it could help me with? If its the former, then it's not going to happen. My engine does have 107k miles on it now and I'm sure changing them out with aftermarket ones would be good for it, but if I do all that my turbo fund will be severly limited/delayed.

 

[SlowSpyder]

heres a nice site for a turbo 2.4
http://groups.msn.com/QuickSpyder/_homepage.msnw?pgmarket=en-us

 

[boostedinaz]

The compression is going to be to high to run any decent amount of boost. If you go to www.4G64.com they have a buch of info on you planned setup. I hate to tell you but if you think you are going to be able to just do a quick inexpensive swap you are in for a treat.

 

[nogospyder]

If you trubo a stock bottom end you can only run 6 to 7 psi of boost, by what others who have tried it said. plus you have to worry about boost spike and creep.

 

[TimDSM]

Ok, so in conclusion, I have to buy rods and pistons for the bottom end. Are Eagle rods and Ross pistons satisfactory?

 

[CanadianTalon]

Ok, so in conclusion, I have to buy rods and pistons for the bottom end. Are Eagle rods and Ross pistons satisfactory?

Eagle rods are fine for 600+ horsepower, and ross makes nice pistons

 

[97EclipseGSX]

I ran 8 pounds coming from a PT61 on a stock bottom end 2.4, 2.0 head w/272's and port work. The bottom end was thrown in as a back up motor. They have 9.6:1 compression pistons.

It ran good untill I decided to overheat it on the way to work. I wanna say it was in the car for 6 or 7 months.