Porting Crossfire intake, first attempt, please critique
Instructor
Joined: Jan 2006
Posts: 160
Likes: 1
From: Fl
Pro
Joined: Apr 2008
Posts: 694
Likes: 1
From: Spokane WA
The very first time I ever saw a picture of the inside of the crossram manifold I wondered anyone ever experimented with shortening the runners. Not sure how long they are stock (As I don't have one), but that seems like a place one might look to if they wanted to go with agressive heads/cam work.
Keep gringing.
Pro
Joined: Apr 2008
Posts: 694
Likes: 1
From: Spokane WA
<---Just buy them boobies and they let you do what ever you want, even porting in the house, I was told I would have to do that in the basement.:o
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,187
Likes: 1
From: Superior WI
Now I just have to decide on a set of headers.
Working in the kitchen
If you only saw all the filings strewn around the garage you'd know why I'm laughing!!Hmmm....I wonder what shortening the runners would do, this calls for more research.
Wow you guys are really making this a great thread, I appreciate all of the input
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Anyone that explains or posts pictures before this douche gets banned for a lifetime again, is doing the whole world a disservice. I tried to help him months ago, and all he has done is stalk me all over the Internet and pretend to be a buddy. He showed up on a local forum with yet another alias "kennypowers", and since he has been exposed, yesterday, and today he has gone ballistic. Check his irrational post # 87 (this thread) in response to my benign post #67 and all his posts after #87, his first in this thread. It will soon become evident to all, that the guy has skipped a tooth, gone 'round the bend.
HERE is a post by our boy, Sherman Nelson, AKA: Nelson84 on another forum he was banned from, bragging about being banned from CF forum, here, for a lifetime. Here are a few of the known aliases:
85vette-84vette
85L98-84L83
nelson84 (banned now)
CanaMontana (girly like Hanna) because he claims residency in MT and Canada)
Sherman -like "Sherminator" the regurgitator. From American Pie, and b/c he can only repeat what he's heard. But usually not correctly or in context, because he doesn't have a clue.
I am sure there are more. When the mods get a belly full of him and ban him, he re-registers under a new user name. This is only the tip of the iceberg.
RACE ON!!!
HERE is a post by our boy, Sherman Nelson, AKA: Nelson84 on another forum he was banned from, bragging about being banned from CF forum, here, for a lifetime. Here are a few of the known aliases:
85vette-84vette
85L98-84L83
nelson84 (banned now)
CanaMontana (girly like Hanna) because he claims residency in MT and Canada)
Sherman -like "Sherminator" the regurgitator. From American Pie, and b/c he can only repeat what he's heard. But usually not correctly or in context, because he doesn't have a clue.
I am sure there are more. When the mods get a belly full of him and ban him, he re-registers under a new user name. This is only the tip of the iceberg.
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
I'd be happy to help more but not while the "booby boy" is lurking. He has gained waaay more information from me than he deserves.
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
RACE ON!!!
Cruising
Joined: Nov 2009
Posts: 10
Likes: 0
From: Rottneros/Simi Valley Varmland/California
God grind job, Exact port matching is a waste of time and an error. Why you may ask ? First of all, why did GM forgot to port match both the intake and the headders you may ask ???? It is very simple to accomplish good port matching in a mill or during the casting process.
The miss match gives you something that you want, HP !!!
It is is easy to get blindfolded if you get 50 HP from perfect port matching. If i told you that you get 10 more for free if you left 1-2 millimeters all the way around the intake ( narrower in the intake ). Would you believe me ?? Probably not but that is the case.
It is the same thing, head to headders (narrower in the head) but much more HP involved .
So do not port match headders and intake to the head. The crossfire intake do not have mismatch, it is a restriction.
The miss match gives you something that you want, HP !!!
It is is easy to get blindfolded if you get 50 HP from perfect port matching. If i told you that you get 10 more for free if you left 1-2 millimeters all the way around the intake ( narrower in the intake ). Would you believe me ?? Probably not but that is the case.
It is the same thing, head to headders (narrower in the head) but much more HP involved .
So do not port match headders and intake to the head. The crossfire intake do not have mismatch, it is a restriction.
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Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
WOW is all I can say .... I am in now way bashing the O/P determination just questioning it and wondering why he would put so much time and effort into CFI manifold.
There are clearly better alternatives and one that comes to mind is being CFI is a MAP/batch fire based system why not re-pin the ecm and run a 7727 and a miniram? I know price is an issue for many but if you added all the hours of cutting a CFI manifold that time alone would have equaled out to a used mini-ram & the power gains well beyond that of CFI would in my eyes be inspiration enough to dump CFI.
There are clearly better alternatives and one that comes to mind is being CFI is a MAP/batch fire based system why not re-pin the ecm and run a 7727 and a miniram? I know price is an issue for many but if you added all the hours of cutting a CFI manifold that time alone would have equaled out to a used mini-ram & the power gains well beyond that of CFI would in my eyes be inspiration enough to dump CFI.
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,187
Likes: 1
From: Superior WI
WOW is all I can say .... I am in now way bashing the O/P determination just questioning it and wondering why he would put so much time and effort into CFI manifold.
There are clearly better alternatives and one that comes to mind is being CFI is a MAP/batch fire based system why not re-pin the ecm and run a 7727 and a miniram? I know price is an issue for many but if you added all the hours of cutting a CFI manifold that time alone would have equaled out to a used mini-ram & the power gains well beyond that of CFI would in my eyes be inspiration enough to dump CFI.
There are clearly better alternatives and one that comes to mind is being CFI is a MAP/batch fire based system why not re-pin the ecm and run a 7727 and a miniram? I know price is an issue for many but if you added all the hours of cutting a CFI manifold that time alone would have equaled out to a used mini-ram & the power gains well beyond that of CFI would in my eyes be inspiration enough to dump CFI.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
There are clearly better alternatives and one that comes to mind is being CFI is a MAP/batch fire based system why not re-pin the ecm and run a 7727 and a miniram? I know price is an issue for many but if you added all the hours of cutting a CFI manifold that time alone would have equaled out to a used mini-ram & the power gains well beyond that of CFI would in my eyes be inspiration enough to dump CFI.
It will take some serious "re-pinning" to get a wiring harness made to fire two TBI injectors to run eight port injectors. That is not to say it can't be done. If you want to do that, I say go for it. It likely would make more power, properly done. But "clearly better"? That would be a matter of opinion... oops, in your case, fact.
RACE ON!!!
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Anyone that explains or posts pictures before this douche gets banned for a lifetime again, is doing the whole world a disservice. I tried to help him months ago, and all he has done is stalk me all over the Internet and pretend to be a buddy. He showed up on a local forum with yet another alias "kennypowers", and since he has been exposed, yesterday, and today he has gone ballistic. Check his irrational post # 87 (this thread) in response to my benign post #67 and all his posts after #87, his first in this thread. It will soon become evident to all, that the guy has skipped a tooth, gone 'round the bend.
HERE is a post by our boy, Sherman Nelson, AKA: Nelson84 on another forum he was banned from, bragging about being banned from CF forum, here, for a lifetime. Here are a few of the known aliases:
85vette-84vette
85L98-84L83
nelson84 (banned now)
CanaMontana (girly like Hanna) because he claims residency in MT and Canada)
Sherman -like "Sherminator" the regurgitator. From American Pie, and b/c he can only repeat what he's heard. But usually not correctly or in context, because he doesn't have a clue.
I am sure there are more. When the mods get a belly full of him and ban him, he re-registers under a new user name. This is only the tip of the iceberg.
RACE ON!!!
HERE is a post by our boy, Sherman Nelson, AKA: Nelson84 on another forum he was banned from, bragging about being banned from CF forum, here, for a lifetime. Here are a few of the known aliases:
85vette-84vette
85L98-84L83
nelson84 (banned now)
CanaMontana (girly like Hanna) because he claims residency in MT and Canada)
Sherman -like "Sherminator" the regurgitator. From American Pie, and b/c he can only repeat what he's heard. But usually not correctly or in context, because he doesn't have a clue.
I am sure there are more. When the mods get a belly full of him and ban him, he re-registers under a new user name. This is only the tip of the iceberg.
RACE ON!!!
... nice!Well its looks like the OP has sifted through the BS posts. Good for him!
Repinning a 7727 his old school.
Now a days easier just to go EBL/Flash.... plug and play
Some here know I'm going HSR from CFI.. but thats only cause the HSR is new and FREE! Already have the EBL so the conversion is cheap.
Keep up the good work on the grinding!
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
Speaking to MY reasons, I don't want to put words in to his mouth, Because to him, his time is free. He wants to improve performance on HIS car HIS way with out buying "cookie cutter" solutions. And to gain a sense of accomplishment
Define "better", Better in what way.
It will take some serious "re-pinning" to get a wiring harness made to fire two TBI injectors to run eight port injectors. That is not to say it can't be done. If you want to do that, I say go for it. It likely would make more power, properly done. But "clearly better"? That would be a matter of opinion... oops, in your case, fact.
RACE ON!!!
Define "better", Better in what way.
It will take some serious "re-pinning" to get a wiring harness made to fire two TBI injectors to run eight port injectors. That is not to say it can't be done. If you want to do that, I say go for it. It likely would make more power, properly done. But "clearly better"? That would be a matter of opinion... oops, in your case, fact.
RACE ON!!!
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Keep your personal feelings out of the OP's thread and save it for the track, I'm gunning for you at the track, when you line up next to a C4 don't look over it will be me. I don't want to intimadate you to much just concentrate on the tree, you will see my tail lights soon enough. Coming to a track near you.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Until you actually do...SOMETHING, all you are doing is spewing your misguided opinion, which contrary to your statement is not fact.
The OP is doing a good job on a good, cheap mod. The BFTB on this mod is about as good as you will get in "cars". To hack down the good idea and excellent effort thus far, to argue with others that have ACTUALLY DONE IT and have objective data for results... I mean, are trying to look like an idiot?
Wel all know where your OPINION lies on thsi subject. We all know that if you ever do anything to your own car, it won't be porting the intake. Good for you. Go find a Mini Ram thread and jump on there to talk about how great it is.
Last edited by Tom400CFI; Nov 3, 2009 at 12:39 PM.
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
- he can't keep up with his list of challenges that he's made.personally I don't think he has anytime cause he's to busy posting and thinking up more bs to post.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
I know it. I completely agree.
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
Besides I would rather put any performance upgrade on my other vette
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Then you had better part out your "trans am" then too, since it's origionally a CFI, it's obviously junk too. Best of luck w/your "other 'Vette"! So long! AMF! Don't let the door hit you in the... 
So long! AMF! Don't let the door hit you in the...