whats the best intake manifold for a 89 civic si

 

the old OBX manifolds

 

Probably the stock one. What is your mods/upgrades thus far that would require more airflow?

 

In stock form, the y8 intake manifold flows the best....

You could do a y8 intake manifold, ls throttle body (you'll need to port this a little bit)

But...you're not going to see much of a gain out of it. but if you just wanna do it go for it

 

z6 and y8 intake manifolds are good upgrades for the stock engine, paired with a LS or 1st gen b16 throttle body is a nice, cost effective setup. However, you will not see any increases in power from the throttle body unless you port match the intake manifold the bigger throttle body, the lip will create turbulence and hurt air flow resulting in lower air velocity which will ultimately hurt hp. So uless you port match the IM to the TB, the TB upgrade will only hurt you.

If you go aftermarket you cant beat a goob ITB setup. But if you you were just to buy a manifold i would go with Skunk2 and then the OBX. I have seen both pieces in person and they are both quality, but the only reason i say skunk over OBX is because the testing Skunk does before they release products.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by untitled &raquo;</TD></TR><TR><TD CLASS="quote">z6 and y8 intake manifolds are good upgrades for the stock engine, paired with a LS or 1st gen b16 throttle body is a nice, cost effective setup. However, you will not see any increases in power from the throttle body unless you port match the intake manifold the bigger throttle body, the lip will create turbulence and hurt air flow resulting in lower air velocity which will ultimately hurt hp. So uless you port match the IM to the TB, the TB upgrade will only hurt you.

If you go aftermarket you cant beat a goob ITB setup. But if you you were just to buy a manifold i would go with Skunk2 and then the OBX. I have seen both pieces in person and they are both quality, but the only reason i say skunk over OBX is because the testing Skunk does before they release products.

</TD></TR></TABLE>


I completely agree, except if you're going to actually shell out that much money e.g. $200+ on a intake manifold you seriously might as well just put that money towards a HMT kit....You can easily piece together a cheap *** kit for $400 bucks. and that will give you *way* more power than what you would for your intake manifold cost.

 

What about the Victor x

 

The victor x is good for high horsepower applications. A high revving n/a motor will benefit as will a boosted engine but for a close to stock engine you are better off going with a z6/y8 or skunk2 manifold.

However I don't think JG makes a victor x manifold for the d series anyway.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gutted-dx &raquo;</TD></TR><TR><TD CLASS="quote">whats the best intake manifold for a 89 civic si</TD></TR></TABLE>

I have a z6 manifold FS if you want to go that route...one of the nicer manifolds for the d-series along with the y8. Check my sig.

Vince

 

Edelbrock PerformerX intake here

 

skunk2 !!

 

http://www.eraceparts.com/item...62287 Pretty good price for IM if you ask me.