can I turbo?

[zeiss150]

Hey Z people, Has anyone or does anyone know weather or not I can turbo an F-54 block with flat head pistons. I figured out the compression ration would be 8.07:1 the stock turbo L28 was 7.45:1 (I think) Is the extra compression gonna be a problem?

Rock on Z people

[Zrush]

I do believe that compression ratio is within the tolerences for a turbo. I wanted my husband to turbo his 77 but he said the compression, 11:1 is WAY to high for a turbo. I said how about a supercharger then. He claims that's there's no "proven" supercharger for the L28. Next mod is a NOS mister or fogger later down the line.

Vicky

[Greatwhite]

Hey Z people, Has anyone or does anyone know weather or not I can turbo an F-54 block with flat head pistons. I figured out the compression ration would be 8.07:1 the stock turbo L28 was 7.45:1 (I think) Is the extra compression gonna be a problem?

Rock on Z people

It depends on how much boost you plan on making with the turbo...

Justin

[240ZX]

Vicky,

If I'm not mistaken, Jim Cook Racing still sells a supercharger kit for the L6 engine. One of the Z car club presidents back east has a nicely installed unit on his 240Z. From what I can remember from my conversation with this gentelman, it works quit well. He did add that he had to run larger fuel lines from the tank to the engine bay. Other than that he said it is a good package and performs well.

[drunkenmaster]

Should be fine, hopefully running EFI and well tuned.

[zeiss150]

come on you guys ... nothing... no one has any ideas? Where's all the L engine super nerds?

OOOOOOOOOPS! PLease disregard this post ... I didn't see the posts. Im a dork.

Rock on Z people

Matt-

P.S. I was just planning on running the stock boost ... which is like 8Lbs or something right?

[PrOxLaMuS©]

*sigh*

a high compression turbo L28 motor will not hurt the motor. However.. and intercooler is recommended to prevent detonation.

If your looking for high horspower figure's... stay away from high compression. The only advantage is quicker throttle response and more low end torque.

However, if you compare an L28 turbo motor with low compression, and a high compression turbo motor, at the SAME boost levels, the low compression with produce more horsepower and torque and get better fuel consumption all the way around. Also with high compression i've read that you need a higher octane fuel for the car to run as smooth as a low compression.

With a proper setup, and an intercooler, you should be able to push around 12psi safely without blowing a head gasket, or other vital engine parts.

Electronic's wise... ditch a ZXT ECU.. and go for a standalone setup like MegaSquirt, SDS or even an Z31 turbo ECU.

Plenty of information can be found at http://hybridz.org

But i plan on using my N47 block and head and putting making it a turbo.. with a t3/t04e hyrbid turbocharger, and SDS fuel managment with the MSD 6al controlling my ignition.. and some 440cc Toyota Supra turbo injectors and an Izuzu or Spearco intercooler. it'll be interesting

[zeiss150]

thanks for the Info. ill only be running 8.07:1 CR ... stock comes with 7.45:1 (I think) is that is that much of an increase in CR really considered "high" compression for a turbo?

How much RWHP can I expect with a 12 lbs of boost and that better ECU? and should I use the T-5 trany or should I stay with the 78 5 speed

Thanks again

[PrOxLaMuS©]

with a stock turbo.. at 12 psi... and a well tuned fuel management and bigger injectors you can anywhere from 270rwhp to 300rwhp.

A new turbo can get ya push ya even further.

Don't get me wrong about the 280ZXT ECU it's a good ECU, but if you want some power, and reliable fuel management with diff injectors and a turbo, i would definatly go for a standalone setup. MegaSquirt is about $300, but has to be built from scratch and requires a laptop and SDS is about $1,500 can can be tuned without a laptop which is an advantage. The Z31 turbo ECU can also be configured to work with the L28 with proven horspower bumps.

Your compression sounds good... the majority of the newer cars coming out with turbo's are about 8.5:1 and yours is a bit lower.. so it'll work out!

the T-5 tranny is always a plus... and alot of fun.. but isn't necessary unless you want some huge HP and torque numbers. Then the T5 will step in to handle the power.