stock crossfire intake
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?
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Could be??
My fuel pump was replaced by the PO although I dont know if it was upgraded to the 85 unit. I will also bog when below a 1/4 tank, which I believe is just a characteristic of the set-up and doesn't pertain to the pump. I've heard o more than one 82 owner experiencing this problem. I never let it get below 8 gals and haven't had a problem since.
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
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?
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
May not make any difference, but I would smooth off the various raised bumps on the runners and base. Make everything smooth. Including the left over ridges from where the egr tunnel was. And, when I removed my egr tunnel, I filled in that open area between the one runner and the side wall. Filled in with epoxy. I dipped mine in a bucket of 50-50 water and muriatic acid to clean it up. Whoa what a bunch of gas fumes exploding. Moved away immediately. Made everything nice and clean inside. Then spray painted inside with high heat chrome paint just for kicks. Looked great. Probably all dirty'd up by now - 125,000 miles later.
Melting Slicks
Joined: Jun 2011
Posts: 2,096
Likes: 15
May not make any difference, but I would smooth off the various raised bumps on the runners and base. Make everything smooth. Including the left over ridges from where the egr tunnel was. And, when I removed my egr tunnel, I filled in that open area between the one runner and the side wall. Filled in with epoxy. I dipped mine in a bucket of 50-50 water and muriatic acid to clean it up. Whoa what a bunch of gas fumes exploding. Moved away immediately. Made everything nice and clean inside. Then spray painted inside with high heat chrome paint just for kicks. Looked great. Probably all dirty'd up by now - 125,000 miles later.
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
OK, Im WELL aware of the limitations of the STOCK crossfire intake, however I have a race shop that allows me to use there flow bench. I first flow tested the stock intake, uderwhelming to say the least since the intake was designed to be used on a 305 cid engine. Well i was commetted to keep this car as close as stock as possible. I researched my options junk the system and go to a carb set-up w/ many intakes to choose from? Well do that and you just decreased the vaue of your vette. OR go to the X-ram or renagade intake? STILL not stock!! Well after many hours of research and discussion with the race shop I decided I would try and increase the flow rating as much as possible with the STOCK crossfire intake. Using a Holley contender intake as my goal for flow. 1st I cut the egr casing out, then cut the runners down by 1 inch removed all casting flaws, using a Dremel w/flex head curved intake ports, and CAREFULLY increased the total port volume by about 3/8" or more total. on the flow bench now out performed the Holley contender!!!!!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
GOOD IDEA!!!on filling in that channel!!
May not make any difference, but I would smooth off the various raised bumps on the runners and base. Make everything smooth. Including the left over ridges from where the egr tunnel was. And, when I removed my egr tunnel, I filled in that open area between the one runner and the side wall. Filled in with epoxy. I dipped mine in a bucket of 50-50 water and muriatic acid to clean it up. Whoa what a bunch of gas fumes exploding. Moved away immediately. Made everything nice and clean inside. Then spray painted inside with high heat chrome paint just for kicks. Looked great. Probably all dirty'd up by now - 125,000 miles later.
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Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Dremel bits
Al I used up A WHOLE BUNCH of sanding disc/pads etc, etc, etc.. however on cutting the angle and knife edging the ports I used a cutter that kinda looks like a drill bit,that worked real good and lasted for the most part. Luckly for you the WORST and HARDEST part has all ready been done.
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
epoxy
Thats a good post an over sight by me I've used a 2 part epoxy [for steel, aluminum etc]from Auto Zone on many OTHER aluminum parts worked good for me. Comes in a 2 part tube w/ a plunger that pushes out equal amounts of hardener & resin mix it up and put it on, Takes about 2-6 hrs to get hard depending on amount used and temp.
Racer
Joined: Mar 2009
Posts: 394
Likes: 1
From: Everywhere US
So good to see some guys still after good CFI solutions ..... the time and effort you're putting into your projects is commendable ...... I hope everyone gets where they want to be with your set up .........
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
for those who want more info on cross-fire repairs. http://www.thecubestudio.com/Crossfi...eriesIndex.htm
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Thanks!!!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
good thread Thanks!!!
for those who want more info on cross-fire repairs. http://www.thecubestudio.com/Crossfi...eriesIndex.htm
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
Even tuned port
I know some scrapped the crossfire for the tuned port$$$$$$$$$AND you still gotta go into the heads and cam! Because JUST switching to the tuned port you only gained MAYBE 30 hp and that switch is alot of money for 30 hp!?!
Thread Starter
Racer
Joined: May 2012
Posts: 354
Likes: 0
good thread
for those who want more info on cross-fire repairs. http://www.thecubestudio.com/Crossfi...eriesIndex.htm
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway