stock crossfire intake
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
1/4 tank bog
I already did that but can't get up in there to adjust it. DCS just got there tool back in stock so I will be ordering that plus I'm gonna change out the fuel pump to the 85 unit. And maybe my fuel pump sock might be plugged a little because when the tank gets down to a 1/4 it starts to bog and going around a corner the car will die then come back on .
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
Runner length, the looooong runners were supposed to increase low-end torque HOWEVER there to long and too SMALL for any real top-end power. You have to take alot of material out of the port size [CAREFULLY] don't forget you got a water jacket on the bottom. and on the length cut about 1" off the port inlet and angle the port at about 35 degrees that opens up the top of the port allowing the intake charge to inter the port at a higher velocity then the stock port which has to go down and around slowing the velocity down quite a bit.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
port angle
The castings were SO bad that some I've seen were even angled backwards!!, the IDEA was good however again the castings were very poor and inconsistent. If DCS gets there renagade in production soon all those problems will be gone, that intake they designed will support OVER 400 hp I'm sure. $$$$$!!! you will have to go in to the engine with the renegade to maximize that intake ie; heads,cam etc,etc,etc.$$$$$$! The thing about our cars are that the R4 700 and rear end aint gonna take too much power before you grenade something? its all about the money, and I aint rich.
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
The castings were SO bad that some I've seen were even angled backwards!!, the IDEA was good however again the castings were very poor and inconsistent. If DCS gets there renagade in production soon all those problems will be gone, that intake they designed will support OVER 400 hp I'm sure. $$$$$!!! you will have to go in to the engine with the renegade to maximize that intake ie; heads,cam etc,etc,etc.$$$$$$! The thing about our cars are that the R4 700 and rear end aint gonna take too much power before you grenade something? its all about the money, and I aint rich.
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Thats not very good on the mpg's?? I had a 1987 C-10 W/ A 350 3.55 rear gears w/a R4 700 getting 17.5 on the highway? That does'nt make sense? A buddy of mine has a 1980 [carbed]vette getting 15 mpg's on the highway? That fp is kinda low, you can take the rear tb off [drivers side] and cut the weld off the rod to make it adjustable, shoot for about 15psi. Turn the rod COUNTER clockwise to increase fp, not sure if your stock pump will produce 15psi? Min.13psi, the 25-26 mpg I got was on a flat hwy and at 60mph.
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Yes it was a good mod. HOWEVER be ready to SPEND ALOT of time on it, the factory castings were terrible at best! I took more off the sides and top on the ports EXCEPT at the exit there your able to take alot off the bottom of the port and make sure you go ALL the way through the port. A flex headed porting tool is needed, I burnt up 1 dremel on this porting job! Oops! "sir I just bought this Dremel and it just quit working"?????
BTW do alot of measuring to get the ports as close AS possible.
BTW do alot of measuring to get the ports as close AS possible.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Yes I used
I used wd-40 AND now thinking back I think it took me more like 15-20 hrs total on just porting not to mention all the measuring being a perfectionist is A FLAW! cause nothings perfect! I WONT port another crossfire intake THATS 4 SURE!!!!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
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Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
crossfire goal
the exit ports are length 1"-11/16 x 1"-1/16 width, I ported the crossfire ports to 1"-3/4 x 1"-1/4 width on the exit, and on the inlet port 1"-1/2 x 1"-1/4 respectfully. Hope this helps? and thats aaaaall the way through the port.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
port size, I had them written down just found them! on the Holley Contender the inlet size is pretty much square 1"-5/16's[barely] W & L, on the exit the Holley is 1"-11/16 x 1"-1/16 on my crossfire intake I was able to get a lil more, inlet 1"-1/2 x 1"-1/4,and on the exit ports I got 1"-3/4 x 1"-5/16's respectfully, and thats aaaaalll the way through the port.
Melting Slicks
Joined: Mar 2006
Posts: 2,248
Likes: 67
From: Warrington PA
Finalist 2020 C4 of the Year - Unmodified
I already did that but can't get up in there to adjust it. DCS just got there tool back in stock so I will be ordering that plus I'm gonna change out the fuel pump to the 85 unit. And maybe my fuel pump sock might be plugged a little because when the tank gets down to a 1/4 it starts to
bog and going around a corner the car will die then come back on .
bog and going around a corner the car will die then come back on .
Melting Slicks
Joined: Mar 2006
Posts: 2,248
Likes: 67
From: Warrington PA
Finalist 2020 C4 of the Year - Unmodified
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
improvements
Looks like that intake has been ported?, and yes there is a couple of areas that you can get a lil more flow, you can take A LIL off the top to get that angle back IT WILL INCREASE the velocity of the intake charge and you can knife edge the inlets ports and curve the sides in a lil. looks like that also has been painted inside? No big deal just curious? Another lil mod that will give you a lil more flow is use 2 gaskets on the injector tower you wont gain much but every lil thing helps. I did find out that the combined CFM on our tbi's are 596 NOT 550 as I was told, by raising the inj. tower you will gain about 3-4 CFM on each tb putting it at or a lil over 600 CFM. BTW you can modify your swirl plates/vanes to help a lil there also. ie:cutting them down SLIGHTLY and bendind them in SLIGHTLY, IMHO I would not remove them. if you want I got many pic's on my ph I could send them directly to you? btw what are the port size's on that intake? my # 937-301-8492 just text me request photos's and I'll send them right to you?