Converting from Crossfire to something else
Thread Starter
Heel & Toe
Joined: Aug 2013
Posts: 22
Likes: 0
Converting from Crossfire to something else
Hi all,
I am thinking of converting from the crossfire injection and not really sure which way to go. Any input as to which way to go? I know that I will need a new intake and what every else that I decide to do but which is the easiest and simplest way?
Thanks
I am thinking of converting from the crossfire injection and not really sure which way to go. Any input as to which way to go? I know that I will need a new intake and what every else that I decide to do but which is the easiest and simplest way?
Thanks
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Carb is the easiest /cheapest ,but you will get plenty of debate on here as to doing it
http://forums.corvetteforum.com/1565824290-post28.html
http://forums.corvetteforum.com/c4-t...t-to-carb.html
Any form of EFI will require a computer and wiring from later car
or aftermarket
Burning Brakes
Joined: Sep 2004
Posts: 1,130
Likes: 19
From: Arkansas
I say enjoy the 84 for what it is or get a newer C4 with the injection system you like. I think you will be happier in the long run. Other than a carb, the cost seems really high for the performance gain.
Instructor
Joined: Oct 2006
Posts: 223
Likes: 5
What type system?
If you are thinking about efi, here are some comparisons that a guy put together. http://www.nastyz28.com/forum/showthread.php?t=240191
Racer
Joined: Jul 2011
Posts: 387
Likes: 2
From: Austin TX
if your car is completely stock and you want to convert to a different fuel injection or even a carb for performance increase - don't waste your time.
I went through 3 different setups on my stock 84 untill i realized i was wasting time because of how poor the factory heads and cam are on the car.
If you are just looking to increase performance, I would say go get some headers and good flowing exhaust. a good running crossfire with some basic bolt ons will keep you entertained depending on how much power you are used too.
I went through 3 different setups on my stock 84 untill i realized i was wasting time because of how poor the factory heads and cam are on the car.
If you are just looking to increase performance, I would say go get some headers and good flowing exhaust. a good running crossfire with some basic bolt ons will keep you entertained depending on how much power you are used too.
Melting Slicks
Joined: May 2009
Posts: 2,772
Likes: 175
From: Decatur IL
2025 C4 of the Year Finalist - Unmodified
2022 C4 of the Year Finalist - Unmodified
Sell your 84 if your not happy with it for something you really like instead of swapping out the intake for something else and depreciate the value of the car. Besides NCRS and Bloomington Gold judges these cars.
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
Remember, an engine is a system and the L83 did well given the age. Just swapping in exhaust will not give it a great power increase, then it will get expen$ive (done that) via a hotter cam, 3.73 rear (huge mistake) on X-fire, stepping finally to the current, which is nasty fast, but - $ee part 1.
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Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
C4 Yo self
I went with a set of full length headers and the special Grind Lunati Cam
the cam is perfect for daily drivers and brings the 350 alive without you dumping any chance of decent gas milage
Let the xxx-fired Nay Sayers eat lunch and pack sand
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
Dominic (aka XfireZ51) has extensive data as result of his working with the L83. Porting the intake, cam(?) change, tune, injector change, etc netted him mid-low 13s; would run with and even beat some LT1 cars on the 1/4 mile track (he says).
It may very well be a better choice to simply trade up to what you want, than do extensive mods on a Corvette (or any car, for that matter). But, talk to Dominic to another L83 modder's input. Then you have options.
It may very well be a better choice to simply trade up to what you want, than do extensive mods on a Corvette (or any car, for that matter). But, talk to Dominic to another L83 modder's input. Then you have options.
Note: XfireZ51 visits here, but has since moved to modding ZR-1s. You may find him on the CF ZR-1 page or the ZR-1 Registry under the Community tab; "members". Dom is a bit of a perfectionist when it comes to tuning, and I'd touch bases with him too if seeking L83 modding info.
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
Good advise
You can get your car to run into the 13's no problem
Making the best out the cross fire is worth everything
You will be stoked and being the under dog always has it's rewards
Please dont Frankenstein you ride
fronzy
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
I say Stick with your Cross Fired setup .. I just finished rebuilding the top end of My 84 L83 xx-fire ... Porting the pajeezez out of the soft aluminum intakes can be done in one evening and add a 218/218 Cam from Lunati.. Wow
I went with a set of full length headers and the special Grind Lunati Cam
the cam is perfect for daily drivers and brings the 350 alive without you dumping any chance of decent gas milage
Let the xxx-fired Nay Sayers eat lunch and pack sand
I went with a set of full length headers and the special Grind Lunati Cam
the cam is perfect for daily drivers and brings the 350 alive without you dumping any chance of decent gas milage
Let the xxx-fired Nay Sayers eat lunch and pack sand
Burning Brakes
Joined: Feb 2013
Posts: 1,173
Likes: 152
From: norway
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
We are ditto
found a set set of full length headers used for 200 - craigs list
added some noisy gears and a ton of polish and chrome .. the fun stuff
bought this 14 inch carbide aluminum Burr and some wax
of course I blew through the intake in a few spots .. took it to my local guy and he fixed me up perfectly
cant wait to run an 1/8th mile here in irwin dale or Fontana speedway
Fronzy
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
OP; I went low 13's with my CFI (Trans Am) for ~$1400.00. That included a change to a 400 SB, as I was starting w/only a 305 and that terrible F-body exhaust.
Used 400; $400
Summit Cam; $90
Summit RR's; $150
Used headers; $100
SLP SS cat back; $300
Ported intake; $40 for gaskets?
Injectors; $90
Electric fan $35 ('Vette already has an electric fan)
JY "Underdrive" pullies; $30
Walbro 255 LPH fuel pump; ? -can't remember
VRFPR; $40
...so it looks like I spent about $1350 or so to get low 13's/105ish out of it. Car ran like stock, got 24 mpg hwy...it was a great running car.
Last edited by Tom400CFI; Jan 3, 2014 at 09:16 PM.
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
Guess I missed your point
That is some odd advice. A cam is expen$ive? They're like $100 bucks. Exhaust can make a big diff, porting the intake (which I guess you didn't do) makes a HUGE diff, and I agree the money spent on gears was a waste.
OP; I went low 13's with my CFI (Trans Am) for ~$1400.00. That included a change to a 400 SB, as I was starting w/only a 305 and that terrible F-body exhaust.
Used 400; $400
Summit Cam; $90
Summit RR's; $150
Used headers; $100
SLP SS cat back; $300
Ported intake; $40 for gaskets?
Injectors; $90
Electric fan $35 ('Vette already has an electric fan)
JY "Underdrive" pullies; $30
Walbro 255 LPH fuel pump; ? -can't remember
VRFPR; $40
...so it looks like I spent about $1350 or so to get low 13's/105ish out of it. Car ran like stock, got 24 mpg hwy...it was a great running car.
OP; I went low 13's with my CFI (Trans Am) for ~$1400.00. That included a change to a 400 SB, as I was starting w/only a 305 and that terrible F-body exhaust.
Used 400; $400
Summit Cam; $90
Summit RR's; $150
Used headers; $100
SLP SS cat back; $300
Ported intake; $40 for gaskets?
Injectors; $90
Electric fan $35 ('Vette already has an electric fan)
JY "Underdrive" pullies; $30
Walbro 255 LPH fuel pump; ? -can't remember
VRFPR; $40
...so it looks like I spent about $1350 or so to get low 13's/105ish out of it. Car ran like stock, got 24 mpg hwy...it was a great running car.
I specifically told you that I cut the intake myself in my shop in one with my own die grinder with my own compressor in one evening
What the heck are you looking .... frikin C4 vettes weighs 3500 to 3800 pounds plus you plus fuel
a few other cars that I own and work on myself and own them
Frankenstein Lives
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
Good luck
That is some odd advice. A cam is expen$ive? They're like $100 bucks. Exhaust can make a big diff, porting the intake (which I guess you didn't do) makes a HUGE diff, and I agree the money spent on gears was a waste.
OP; I went low 13's with my CFI (Trans Am) for ~$1400.00. That included a change to a 400 SB, as I was starting w/only a 305 and that terrible F-body exhaust.
Used 400; $400
Summit Cam; $90
Summit RR's; $150
Used headers; $100
SLP SS cat back; $300
Ported intake; $40 for gaskets?
Injectors; $90
Electric fan $35 ('Vette already has an electric fan)
JY "Underdrive" pullies; $30
Walbro 255 LPH fuel pump; ? -can't remember
VRFPR; $40
...so it looks like I spent about $1350 or so to get low 13's/105ish out of it. Car ran like stock, got 24 mpg hwy...it was a great running car.
OP; I went low 13's with my CFI (Trans Am) for ~$1400.00. That included a change to a 400 SB, as I was starting w/only a 305 and that terrible F-body exhaust.
Used 400; $400
Summit Cam; $90
Summit RR's; $150
Used headers; $100
SLP SS cat back; $300
Ported intake; $40 for gaskets?
Injectors; $90
Electric fan $35 ('Vette already has an electric fan)
JY "Underdrive" pullies; $30
Walbro 255 LPH fuel pump; ? -can't remember
VRFPR; $40
...so it looks like I spent about $1350 or so to get low 13's/105ish out of it. Car ran like stock, got 24 mpg hwy...it was a great running car.
Headers are 20 to 649 ( long tubes )
header gaskets are 50
upper end gasket sets are 150
every small thing adds horsepower.. if you did it all .. your talking still shy of 300
Do you realize that these early C$ vettes have been seriously de tuned .. starting with the compression
stock horsepower screamin out around 205
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Negative. I'm sure that you CAN pay that much. DON'T NEED TO THOUGH!
?
Last edited by Tom400CFI; Jan 3, 2014 at 10:56 PM.