We are looking at putting a samll turbo on our 4age blacktop 20v ...... run around 8 pound of boost. do you think this is safe on a standard engine?

We are looking at putting a samll turbo on our 4age blacktop 20v ...... run around 8 pound of boost. do you think this is safe on a standard engine?

 

Engine go bang

11:1 compression plus 8psi is certain to fail.

don't bother.

Not without low comp pistons anyhow.

Tuning....If it is tuned well, and driven with respect, it will last

yeah we have very high compression in all our cylinders. so i didnt think it wold be possible without some sort of internal work being done.

WHat the point in turboing your car if you gonna treat it nicely, Lower the compression and run 14psi

Holden V8 LS1 engines have 10.5 c/r and when they turbo them and run 8psi they seem to last well and put out 400+rwkw and becasue of the high c/r they have alot better throttle response and torque.

 

Just make sure you have an excellent aftermarket EMS and get it tuned spot on.

Holden V8 LS1 engines have 10.5 c/r and when they turbo them and run 8psi they seem to last well and put out 400+rwkw and becasue of the high c/r they have alot better throttle response and torque.

 

Just make sure you have an excellent aftermarket EMS and get it tuned spot on.

 

The only reason that people boost LS1s stock is because they don't have the cash to rebuild a v8 beforehand. Sure you get more power but something will go bang. They don't have 10.5:1 either, its 10:1-10.1:1.

new turbo audis/vw have high compression - its all about the tune.

new turbo audis/vw have high compression - its all about the tune.

 

Not that high. What motors are you talking about, the new TSI turbos are 9.6:1 and they use a variable lift and valve timing system to lower virtual compression also. Not options on an ae111.

The only reason that people boost LS1s stock is because they don't have the cash to rebuild a v8 beforehand. Sure you get more power but something will go bang. They don't have 10.5:1 either, its 10:1-10.1:1.

 

Yes and no. Why bother to rebuild when they handle it well. Yes it is 10.0:1, I just guessed as I knew it was in the 10's.

 

It is a bit of a high c/r to start with but if theyre keen on doing it go for it. I personally would run 6spi max until you can afford some 9.0 forged pistons.

The only reason the ls1s survive is because they have an extensive and brilliant knock sensor setup factory fitted, which prevents any damage to the motor before it even happens.

 

I personally wouldnt do it, i think it would be possible to tune it so it doesnt ping, but at the same time by running so little timing advance you would be removing most of the power benefit anyway.

Edited October 28, 200718 yr by oh what a nissan feeling!

Blitz do a turbo kit for the AE111 20v using a K3-330R turbo. Not sure on maximum boost levels, but it's intended as a bolt on kit, which indicates no change to the standard compression ratio.

Holden V8 LS1 engines have 10.5 c/r and when they turbo them and run 8psi they seem to last well and put out 400+rwkw and becasue of the high c/r they have alot better throttle response and torque.

 

Just make sure you have an excellent aftermarket EMS and get it tuned spot on.

 

 

Yes and no. Why bother to rebuild when they handle it well. Yes it is 10.0:1, I just guessed as I knew it was in the 10's.

 

It is a bit of a high c/r to start with but if theyre keen on doing it go for it. I personally would run 6spi max until you can afford some 9.0 forged pistons.

 

 

The only reason the ls1s survive is because they have an extensive and brilliant knock sensor setup factory fitted, which prevents any damage to the motor before it even happens.

 

I personally wouldnt do it, i think it would be possible to tune it so it doesnt ping, but at the same time by running so little timing advance you would be removing most of the power benefit anyway.

 

Not to mention the larger crank and rods and heavier mains, Bit of a stupid comparison.

if you're that worried about the compression issue, why not simply have a thicker head gasket made up, from metal of course, there really is no need to go swapping pistons with such a low boost pressure, and as we all know, the GE bottom end is pretty damn solid in the first place!

blacktop has piss weak rods.

 

if i was you id just keep it na.

 

and if i wanted turbo get urself gze rods and low comp pistons for the 20v.

 

then you will be fine.