car1115

So a friend of mine just got a new motor and is selling me his d16y8 for 200 bucks with tranny and around 100k on it. The timing is the only thing that's wrong with it. I have a d16z6 on my car with 150k miles in conclusion are they both gonna give me around the same horse power with a rebuild and in future turbo. I will want to pay for it and get it done the right way.

grumblemarc

iTrader: (4)

Z6. If you truly have researched going turbo you'll know why I said this.

car1115

Should I stick with same tranny?

grumblemarc

iTrader: (4)

You tell me.

civicjunkie17

iTrader: (1)

z6s have better oiling properties.... The transaxles are about the same if I recall correctly. I would use the transmission that has longer gears if I was you.

car1115

Lol. Im definitely getting the y8 and try to get the timing back on track. He changed the head gasket and most of done something wrong that the car was running like crap. He said he had all the bolt measurement and patterns the way he did his researched but who knows

grumblemarc

iTrader: (4)

I would NOT use the longer geared tranny, if there is even that much difference, if I were you. Longer gears are sloooooow. If you're on the "stay in boost longer" myth then you're mis-informed.

grumblemarc

iTrader: (4)

Kid. If you're having the work done then stop with the aimless and vague questions and just talk to the people that will be doing the work. I have a feeling you haven't researched any of this.

civicjunkie17

iTrader: (1)

Do you have any evidence of this? I have a personal friend that ran a few tenths of a second quicker by using a y80 trans compared to his old s80.

I mean it could have just been his driving that influenced the fast time by that little. Could have been coincidental but who really knows.

grumblemarc

iTrader: (4)

Yeah. It's always the friend. Never any first hand experience. Go research this in the FI forum and see what they say.

car1115

It's not that I have done my research I just consider my self with not enough experience to do it my self.

grumblemarc

iTrader: (4)

If you have done ANY research you would know why I'm saying to use the Z6. You should be able to name two reasons. One was already given to you.

Right now it sounds like you're pipe dreaming.

car1115

Ok well thanks for your info.

grumblemarc

iTrader: (4)

I didn't think you could.

civicjunkie17

iTrader: (1)

So just because I haven't personally done it it's impossible? Right. It really depends on the setup. If you're going to be running street radials then longer gears would be better, but if you're on slicks or drag radials then a shorter geared transaxle would be better suited.

grumblemarc

iTrader: (4)

No it's not impossible. But I'm kinda tired of people posting up second and third hand information or referring to extreme case setups to try to back up statements. The information is not reliable and frankly it oftentimes is not accurate. No one asked about a drag setup did they? So it's not relevant. And even still, firsthand information of the setup itself would be more credible and you don't have that.

NotAJDMFanBoy

Shorter gears make you stay in boost when you shift. Though, if you had a small turbo that spooled really low, you could probably still stay in boost with a longer geared transmission, depending how far you're revving it out.

If you're rebuilding, use the best of both engines. Use the Z6 bottom end and Y8 top end.

There's a lot of misinformation about turbo setups, the biggest being about the compression ratio being low is better. I have 9.5:1 on my gsr and I don't like it, it's a little slow out of boost. More compression would make it quicker out of boost but tuning would be more risky. A lot of people go with too big of a turbo. There are thousands of turbo civics that have been built, you should be able to learn what a setup will do with some research. A little turbo would be fun on the street, but a bigger turbo will make more power at a lower pressure. There's always trade offs, trading power on the low end for top end, top end for low...

civicjunkie17

iTrader: (1)

I just assumed it was for a drag setup. On a road course or auto-x shorter gears would dominate.

In essence. Transmission/Transaxles are torque multipliers from 1st through 3rd gear. 4th being 1:1 Ratio and 5th being overdrive. On a higher horsepower engine, longer gears will suit it better. But engines with less power, will need shorter gear to "multiply" the torque. No one asked about drag setups? I never knew I couldn't put my own input on a subject into a thread, that's weird I'll try to refrain from doing that next time. If you wanted more information about his setup all you had to do was ask, instead of assuming I don't have access to it.