What is the lowest point of boost that you can actually feel or will make a difference on a d16 (CRX Si) motor? and why?

 

Um, 1 psi will probably make a difference, not very much though.

 

I ran 3 PSI while i was tuning my setup.

felt the same as running an intake, header/cat/exhaust on the stock D16A6 motor.

(by this I mean, it pulled the same)

 

anyone? whats the lowest boost you can run with a difference...

 

depends on how well calibrated your butt dyno is. I'd say 1 psi will be kinda noticeable, but 2 psi, somewhat more. 3 psi is definitly noticeable, while 4 will give a nice pull. 5 psi is nice, but not as much as 6. Was this the stupid answer you were looking for?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Teg4e &raquo;</TD></TR><TR><TD CLASS="quote">depends on how well calibrated your butt dyno is. I'd say 1 psi will be kinda noticeable, but 2 psi, somewhat more. 3 psi is definitly noticeable, while 4 will give a nice pull. 5 psi is nice, but not as much as 6. Was this the stupid answer you were looking for? </TD></TR></TABLE>

no, i was looking for a valid reason and what the actuall lowest boost you can run with before you would actually start gaining.

 

1 psi would probably not be noticable, because it would merely offset the VE losses due to running a more restrictive intake and exhaust path. You probably need 2-3 psi before you actually have a power increase.

Who cares that? A turbo is too big a project to just set the boost at 3 psi. If you have it, use it.

 

Isn't atmoshpheric pressure 1psi? I was pretty sure it is.... am I right? So, the way you guys are talking, 1psi would be equal to 2psi. Now I'm just rambling. I'm tired. ****.

 

either way whats the point... 4.5- 5.0 psi is almost to low.

you might as well get one of those electric superchargers... they almost push 1psi (maybe).

 

atmospheric pressure is 13-14 psi. When you put a turbo on ur car, u add more psi on top of atmospheric pressure.

 

well, the reason i was asking is because my friends turbo CRX runs 4.5 psi, and im like well thats like nothing, i was like ya, like 3 PSI is pretty much stock preformance, he was tellin me that any PSI is difference...

 

Well look at it like this, when people go and put i/h/e on thier car they say they can feel a difference on the butt dyno(maybe 10 hp), so would you think 1-2 psi would be noticable

 

Atmospheric pressure is 14.6956, commonly approximated by 14.7 psi. If you want to be more general than that, you could call it 15 psi, but why?

When we talk about boost, we are talking about gauge pressure, not absolute pressure. Gauge pressure is the pressure degarding atmospheric as zero.

When you install a turbo, you lose some power because of the higher backpressure and more restrictive intake causing VE losses. You need to add some airflow with boost, in order to get back to where you started.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civic@7psi &raquo;</TD></TR><TR><TD CLASS="quote">Isn't atmoshpheric pressure 1psi? I was pretty sure it is.... am I right? So, the way you guys are talking, 1psi would be equal to 2psi. Now I'm just rambling. I'm tired. ****.</TD></TR></TABLE>

No, go to bed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kpt4321 &raquo;</TD></TR><TR><TD CLASS="quote">Atmospheric pressure is 14.6956, commonly approximated by 14.7 psi. If you want to be more general than that, you could call it 15 psi, but why?

When we talk about boost, we are talking about gauge pressure, not absolute pressure. Gauge pressure is the pressure degarding atmospheric as zero.

When you install a turbo, you lose some power because of the higher backpressure and more restrictive intake causing VE losses. You need to add some airflow with boost, in order to get back to where you started.</TD></TR></TABLE>

well this is the question i was posing, like what is that psi that you would get the difference?

 

Exactly how much you need will depend on lots of things. I'm thinking something like 3 psi, but who knows. It's definately more than 1.