Turbo'd 420a motors

[tenzoR]

For those of you running turbo'd 420a motors, how much psi are you running, and how much hp?

 

[GSXSixteenG]

Psi is irrelevant, especially since you aren't even asking what size turbo they are running.

 

[tenzoR]

i dont care what turbo they have. i just wanna know how much boost there running.

 

[GSXSixteenG]

i dont care what turbo they have. i just wanna know how much boost there running.

... Ok carry on then.

 

[96 420a-t]

Turbo size is a huge thing to know with pressures. A t25 at 7 psi is fine. Go try a gt35r at 7 psi and see what it does.

8psi is your max on a stock block.

 

[Josh97eclipse]

It all very s upon the cars, got to take into consideration on how healthy the motor is and what you have done to the motor etc, If you have a built block with good parts you can throw 22 or more psi depending of you have the supporting mods. Now on a stock block the max ppl have ran is 10, same for years some for weeks. OP a good website is 2gnt.com

 

[junkyarddsm]

If you look in the search forms button their are many many threads on turbo 420a's just type in turbo 420a and do some reading.

A lot of people are running 8-10 psi due to non-built motors. I have seen people run up to 26 psi on fully built motors. Most of the 8-10 psi use a small t3 or t3/t4 setup and see pretty good numbers around the 200 whp range. If you have a look in the user profiles of the 420a turbo cars that have been dynoed and have their numbers posted that would be a good way to find out what people are making as well.

The size of the turbo does mater because you can get 10 psi out of a t3 or you can get 10 psi out of a t4. The t4 being bigger will push more air then the t3 so even tho it is the same 10 psi you will be pushing more air to your motor. Size of your turbo should always matter. Lets say you put on a huge turbo like big 20g (example) and set your waste gate to 10 psi the turbo will have slow spool due to the size of the turbo. If you have a t25 and set it to 10 psi then it will spool faster due to once again the size it is smaller. Im not going into to deep of detail on this its just a basic concept to grasp the idea.

You should build for whp not psi. Do some looking around and see what kinda of threads you can find read up and learn. Do not mean to sound like a preacher or giving to much information but just my .02.

 

[LiquidX]

Review the whole website, search, and read before posting. You would have found you answers under the dyno challenge section.
DSM Dyno Challenge - 420a

Not only what has been mentioned above, but the amount of power is also limited to the motor internals to be ran safely.

Let's say you have a Holset HX35, a stock 420a may get away with 6-10lbs while a built 420a could take on 25+ from the same turbo. However, 10 psi on a t25 does not equal 10 psi on a 6262 in terms of airflow.

 

[95talongirl]

The size of the turbo does mater because you can get 10 psi out of a t3 or you can get 10 psi out of a t4. The t4 being bigger will push more air then the t3 so even tho it is the same 10 psi you will be pushing more air to your motor. Size of your turbo should always matter. Lets say you put on a huge turbo like big 20g (example) and set your waste gate to 10 psi the turbo will have slow spool due to the size of the turbo. If you have a t25 and set it to 10 psi then it will spool faster due to once again the size it is smaller. Im not going into to deep of detail on this its just a basic concept to grasp the idea.
.

QFT. Turbo size IS important.

 

[g4ebguy90]

My teacher, ran 10 psi on a stock 420a with 150k on it. For a year then sold it.