X-ram
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 34
From: The Top of Utah
Some people like them and several have taken them off. I have a hard time imagining it's any better than my home ported manifold. The ported stock manifold is the only modification to my worn out, all original, engine.
RACE ON!!!
RACE ON!!!
Pro
Joined: Dec 2002
Posts: 603
Likes: 0
From: 84 383 XFire Chandler, AZ
If the motor is stock you would better off with a ported crossfire manifold. I had a XRam on my stock motor and I took it off and installed a ported stock manifold. The performance was much better with the ported manifold. Now I have a 383 and the XRam is being used. That should give you a quick comparison.
Team Owner
Joined: Jan 2006
Posts: 26,598
Likes: 0
From: Hampton, VA Yea, i'm a redneck... but you love it
Cruise-In 8-9 Veteran
aka/Trunk Monkey/Banned For Life/Corvette For Life
Originally Posted by csiki22
So you opened up the stock
manifold so it would match up
to the head?I relize the stock
manifold is like really small port
wise.I thought they were
"unportable"?
manifold so it would match up
to the head?I relize the stock
manifold is like really small port
wise.I thought they were
"unportable"?
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
On the underneath side of the Stock crossfire intake manifold you'll see the Runner castings. The Runner castings are shortened and ported also, the egr passage is ground down.
Here's a picture of the procedure. http://www.technovelocity.com/chevyh...rt_polish.html
Go to http://www.crossfire.homeip.net/ for more crossfire information.
Here's a picture of the procedure. http://www.technovelocity.com/chevyh...rt_polish.html
Go to http://www.crossfire.homeip.net/ for more crossfire information.
Last edited by GKK; Sep 29, 2006 at 10:05 PM.
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Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
Originally Posted by csiki22
So you opened up the stock
manifold so it would match up
to the head?I relize the stock
manifold is like really small port
wise.I thought they were
"unportable"?
manifold so it would match up
to the head?I relize the stock
manifold is like really small port
wise.I thought they were
"unportable"?
CFI-EFI says his dropped his car about .6 tenths in the 1/4. I ported mine and I got about .4 drop in ET myself. I could have gone deeper but had so much time in it,I just had to put it on and try it!
Got me from around 15.1 to 14.7 ET's
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
Originally Posted by silver84
Shinobi-X,
>That intake has tons of material to port away<
how much larger, can the runners be changed to?
what cross section area?
any numbers?
>That intake has tons of material to port away<
how much larger, can the runners be changed to?
what cross section area?
any numbers?
Its probobly a 1204 size gasket but you can inlarge it to a 1205 size gasket. I did and don't just inlarge the intake port either,go deeper and deeper.You can also port the intake side that underneth the top plate the throttle bodies sit on aswell.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 34
From: The Top of Utah
Originally Posted by csiki22
You drag race?How much differance
did it make in the 1/4 mile?(your
ported manifold that is.)
did it make in the 1/4 mile?(your
ported manifold that is.)
RACE ON!!!
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
I have the x-ram on a stock motor, with only a few mods. (see my sig). I also have a dyno under my corvette pics with the X-ram on. It should have been higher that day. My fuel was running rich. I have since bought a set up so I can adjust fuel psi. I also have a stock 84 dyno that I need to get posted soon so that people can see the comparison of the stock manifold vs. X-ram.
Personally I like it, expensive YES, worth it is in the eyes of the beholder.
Personally I like it, expensive YES, worth it is in the eyes of the beholder.
Safety Car
Joined: Dec 2004
Posts: 4,088
Likes: 0
From: Poop land
Originally Posted by CFI-EFI
I picked up better than 6 tenths in the 1/4 mile. A month later I installed 2" bored TBs for NO additional gain. Unlike the link provided, I didn't touch my EGR passages. My EGR remains fully operational. Despite NOT removing the EGR channel, inside the manifold, I ended up with a 3 pound coffee can, nearly full of grindings. There isn't a lot of surplus material in those runner, but I got most if it, and some that wasn't. I love it when someone says something like "unportable". I am pleased with 13 second 1/4 mile times in a 160,000+ mile, oil burning, stocker.
RACE ON!!!
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 34
From: The Top of Utah
Originally Posted by kopbet89c4
What was the trap speed of the original vs. ported? That is a damn big improvement!
RACE ON!!!
