Ok, so i got an HO mani sitting in my garage, whats the easiest/most effective way to install this thing on my car? Get out my dremel and grind away the flange to match the ports? use the adapter flange that came with it? scrap it? im getting a tune btw so it should show gains overall hopefully?
ps: yes i did search, its very hard to find a definative answer on anything here lol :p
I say use the flange, just make sure each side of the flange matches the head and intake. Without other mods the manifold wont yield much power.
Zs Z wrote:I say use the flange, just make sure each side of the flange matches the head and intake. Without other mods the manifold wont yield much power.
I though someone dyno tested the HO intake mani and actually lost power over the stocker.
Tinkles
2003 Cavalier 1SV
Bagged and Blown
Tinkles wrote:Zs Z wrote:I say use the flange, just make sure each side of the flange matches the head and intake. Without other mods the manifold wont yield much power.
I though someone dyno tested the HO intake mani and actually lost power over the stocker.
I think that was on a stock motor...
CraiGM wrote:Tinkles wrote:Zs Z wrote:I say use the flange, just make sure each side of the flange matches the head and intake. Without other mods the manifold wont yield much power.
I though someone dyno tested the HO intake mani and actually lost power over the stocker.
I think that was on a stock motor...
It was on a stock engine and it was also a laaaaarge thread that went back and forth discssing the millions of reasons why it was correct or not due to the conditions of the dyno testing. The final concensus was that for a relativly stock engine it would not help maybe even hurt. However for an engine with a ported head, F/I, or N/A with added compression and a good set of cams it would add power. The theory is that the beefy runners slow down air velocity at lower lifts, like stock cams, and is counter conductive to the smaller ports or a unported head. With a ported head and larger cams that rely on more airflow up top and less velocity at the low end the engine will benefit from the larger runners.
Just swap in the LG0.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Taetsch Z-24 wrote:Just swap in the LG0.
words to live by.
Familiar Taste of Poison.
i say you scap the adapter flange you have if it looks like the one that guy had in the other thread you started, and get the one i have. you seen how well(dam near perfect) mine is port matched.
fawk the flange no one has yet to make the flage worth while because you still have to notch the holes on the manifold in order for it to bolt on so your adding 1/2" for nothing you can very easily make the 2.3 runners B shaped to match the head i did it but no on eseems to listen because everyone lately is to chicken sh*t to modify anything. this board goes through its spurts where no one does bolt on then all of a sudden everyone wants only bolt on mods.
adapter flanges are GAY and pointless
JBO since July 30, 2001
NOTa2_4 wrote:fawk the flange no one has yet to make the flage worth while because you still have to notch the holes on the manifold in order for it to bolt on so your adding 1/2" for nothing you can very easily make the 2.3 runners B shaped to match the head i did it but no on eseems to listen because everyone lately is to chicken sh*t to modify anything. this board goes through its spurts where no one does bolt on then all of a sudden everyone wants only bolt on mods.
adapter flanges are GAY and pointless
the adapters help with heat soak....
and if you just dremel the 2.3 runners you'll have ONE HELL OF A JUMP FROM THE RUNNERS TO THE HEAD! THATS THE LOSS OF HORSE POWER!
Some of the early fontana adapter flanges, which are mostly whats floating around here, lined up very badly the older linded up better. The last run of them were flawless, I used to have one. it perfectly transitioned from one port to the other. Flange or no flange you still need to slot the 2 holes on the manifold. Once I got my 086 head i dremeled it out the just the 2.3 to be a spacer for heat absoroption purposes. wish I would have held on to it.
Quote:
It was on a stock engine and it was also a laaaaarge thread that went back and forth discssing the millions of reasons why it was correct or not due to the conditions of the dyno testing. The final concensus was that for a relativly stock engine it would not help maybe even hurt. However for an engine with a ported head, F/I, or N/A with added compression and a good set of cams it would add power. The theory is that the beefy runners slow down air velocity at lower lifts, like stock cams, and is counter conductive to the smaller ports or a unported head. With a ported head and larger cams that rely on more airflow up top and less velocity at the low end the engine will benefit from the larger runners.
Hmm, that whole thing sounds familiar.
-M
Remember....syringes go in the RED waste basket.
