TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

swapping CFI into my camaro

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Old Apr 28, 2001 | 07:46 AM
  #1  
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From: wareham mass
swapping CFI into my camaro

i'm going to be swapping a Cf1 into my 84 Camaro, does anyone know if it will work? it should bolt up the same, but do i have to change the heads? need info!
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Old Apr 28, 2001 | 11:50 PM
  #2  
Keith5's Avatar
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From: Wilmington NC
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
It should bolt right up. The CFI computer might not be an exact match for your engine's cam and heads though.
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Old Apr 29, 2001 | 11:25 AM
  #3  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
It'll bolt right up but can I ask why?
A carb or TBI setup is going to be cheaper to tune.

------------------
, Jon (350 TBI!)
91 Red My website
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Old Apr 30, 2001 | 02:23 AM
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<font face="Verdana, Arial" size="2">Originally posted by JPrevost:
It'll bolt right up but can I ask why?
A carb or TBI setup is going to be cheaper to tune.
</font>
Umm, CFI IS a TBI system.

You can run the CFI system off of a Painless Wiring harness and a GM ECM 1227747 pretty easily. Painless required a little adapter to split the IAC tho. You can also buy the harness from Turbo city as well. Check out
http://www.crossfire.homeip.net/ for lots of CFI talk.



------------------
Kelly 'GhoSSt' Rosato
1996 Impala SS, 383 LT4 (14.65 up here, 13.24 lower)
1984 Firebird, +.060 350 (Vortech Heads, HOT Cam, and schtuff)
1993 Caprice, 5.7 TBI (stock . . . FOR NOW)

"And if you wrong us, shall we not revenge? Revenge. The villany you
teach me, I will execute, and it shall go hard but I will better the
instruction."

Shylock in Act III, Scene I of 'Merchant of Venice' by William Shakespeare
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Old May 1, 2001 | 12:11 AM
  #5  
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From: Cape Girardeau Missouri
Car: 83 Z28
Engine: 400
Transmission: Th 350
Axle/Gears: 3.27 9 bolt
before you put on that crosfire manifold look at the intake ports compared to a regular manifold they are about the same size as the water ports on cfi gm called this a velocity style port I call it a restriction to all but the smallest of engines 265,267,283 it is ok for low rpm use and it looks really cool but if you want to modify your car later yhis will be in the way of making any power at upper rpm's
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Old May 1, 2001 | 05:20 AM
  #6  
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i don't know if it would be worth the trouble the intake itself isn't in really bad shape but both throttle bodys are very dirty and corroded. but i need to change my induction system. anyone know where i can get a new or rebuilt emissions legal carb for little$$$?
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Old May 1, 2001 | 01:38 PM
  #7  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
<font face="Verdana, Arial" size="2">Originally posted by GhoSSt:
Umm, CFI IS a TBI system.

You can run the CFI system off of a Painless Wiring harness and a GM ECM 1227747 pretty easily. Painless required a little adapter to split the IAC tho. You can also buy the harness from Turbo city as well. Check out
http://www.crossfire.homeip.net/ for lots of CFI talk.
</font>
You don't think I know that crossfire is a TB system? When I said carb or TBI I'm talking about the later models which are less restrictive and cheaper to get more more power and have a lot more potential than crossfire. Crossfire is an early TBI system that was designed like our stock L03 "swirl port" heads. They went for a velocity design which is fine for STOCK but leaves you with no potential!!! Ever look at the crossfire "spinners" in the intake manifold? They're awefully restrictive. I think it's a cool intake but it's a piece if you want performance. You can make them fast but it'll cost you a lot more than a later style TBI or carb setup.
Ebay has plenty of carbs for sale. What engine do you have? I don't want to tell you to get a 750 carb if it's a 305 (which I'm guessing it is if you wanted to put crossfire on).
Crossfire should be avoided unless you want to restore a car to stock condition. A stock L03 TBI system can be had for next to nothing. Name ONE reason why crossfire would be better than TBI. I can't think of one unless you were going for the road less traveled, in that case I would say get an Iron Duke (4 banger from the early maro's) and keep it stock! Good luck with the crossfire if you decide to go with it.

------------------
, Jon (350 TBI!)
91 Red My website
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Old May 2, 2001 | 05:42 AM
  #8  
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From: wareham mass
i have an 84 iroc Z-28. it has an lg4 305. but the stock carb replacemant is $445. i could buy an aftermarket one for less than that. the problem is that in massachusetts my car still has to pass emmissions.
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Old May 2, 2001 | 11:58 AM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Try rebuilding the carb. I have an '81 GMC that had a worn out carb. It cost about $450 for a new one. The rebuild kit is like $35-40. I figured if that didn't work, I was only out $40. Well I did it about 8 yrs and 80k miles ago and it's still working. It now needs rebuilding again. I think the accelerator pump is shot. I never thought I could do it, but it's really easy. You just take out the old gaskets, springs, etc. and put in the new. Just know that you gotta knock out the plugs covering the idle mixture screws before you get the carb back on. Trust me, it ran like a new truck after I did it.
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Old May 2, 2001 | 12:49 PM
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From: outerspace(maybe..pluto)?
wtf are you thinking? cfi is even WORSE than tbi!!!!!!!!!trust me i had tni and it sucked dong,..~!!!!switch from tbi to carb dont put yourself through the hassles of going to cease fire injunktion!!!! ditch the tbi but my god man dont go to cfi go to tpi or carb.please im begging you dont do this!!!!

------------------
89 firebird formula

360 10:1compression (350 .060 over)/fully balnced and blueprinted
comp cams xe262 cam
performer rpm intake/port matched to heads
#1407edlebrock 750
sportsman 2 heads 64cc 2.02/1.60 valves 200cc intake runner/cnc pocket ported
msd 6al/msd8.5 super condutor wires
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.23 posi 7 5/8 rear end.
b trans shift kit(will kill shifts...suck dong!!)
shorty heddman hedders with custom 3" pipe y-pipe back(no damn cat!) with 40 series flowmaster!
griffin daul1" core rad.cutom fabrication to fit(but no cutting )

future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!
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Old May 3, 2001 | 05:21 PM
  #11  
Tom 400 CFI's Avatar
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From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
<font face="Verdana, Arial" size="2">Originally posted by JPrevost:
Name ONE reason why crossfire would be better than TBI.

</font>
O.K. 14.5 @ 95 mph.

Stock 305 with Edelbrock headers, advanced timing, and 160 T-stat.

Do THAT with your "late model" TBI's. :P

------------------
'83 Trans Am: 400 CID oil burning junkyard long block, 224/234 crane cam, Summit aluminum roller rockers, hand ported intake, home bored 2.09" (53mm) throttle bodies, MSD 454 injectors(75 lb/hr), Holley 255LPH fuel pump, custum modded FPR, Edelbrock TES headers, SLP 3" stainless steel cat back, stock ECM & chip. Borg/Warner T-5 World Class, 12" Corvette rotors and clipers, GTA 16" wheels, South Side Machine subframe connectors, 1LE sway bars, 3.45 ring and pinion, Alpine sound.
Best E.T. 13.532
Best MPH 102.24
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Old May 7, 2001 | 11:15 PM
  #12  
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<font face="Verdana, Arial" size="2">Originally posted by Tom 400 CFI:
Do THAT with your "late model" TBI's. :P
</font>

GhoSSt's Top Ten Reasons why CFI is better than regular TBI.

10: Everyone that looks at a TBI unit is instantly bored into a coma.

9: Stock sheet metal aircleaner or open element airfilter? CFI can have BOTH!

8: Cool CFI swirl plates good for vectoring a Harrier Jump Jet.

7: CFI never got the 'peanut' cam.

6: TBI - Totally Boring Injection

5: 1227747 with CFI gets you laid!

4: CFI doesn't have VATS when you do a swap.

3: CFI looks fncking badass. TBI looks like another carb.

2: You can bore a CFI throttle body to 2.09 inches without taking out a second loan on the house.

And the number one reason CFI is better than TBI:

Cool CFI aircleaner can be painted to look like a set of ****.

Kelly 'GhoSSt' Rosato


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Old May 7, 2001 | 11:37 PM
  #13  
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From: Valley, AL
LOL!!! The #1 reason sounds cool, but the Mrs. already accuses me of loving my cars more than her, and if she saw **** under my hood, she'd never let me work on 'em!!!

------------------
82 Z28 350, Ported #882 Heads, Performer RPM cam and intake, hedman headers,650 Demon carb,
Trans: Turbo 350 w/ 4000 stall -- Rearend 7.5 w/ Richmond 4.10's, Auburn Minispool
Best ET: 12.52@107.2
Future plans: Dart headed, Roller cammed 383 in early '01


89 RS, L03 305, Hypertech Chip,cat delete, Dynomax exhaust,K&N open element Filter,160 stat, MSD coil --Trans:700R4 Corvette Servo -- Rearend: 7.5 GM 3.42 w/ posi-lock
New Best ET: 14.91 @92.9
Bassett Racing
Mid Atlantic F Body -82 Z28 Page

R.I.P. Dale Earnhardt #3

[This message has been edited by Basett Racing (edited May 07, 2001).]
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Old May 8, 2001 | 02:47 AM
  #14  
Jza's Avatar
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hehe. If you came up with that in only 10 minutes you should do it professionally. Now's the time since writers are threatening strike.

But hey, f41camaro84, if it's free and you're bored and have nothing to lose, give it a shot just so you can say you've done it.

Personally, I wouldn't considering the crap rep CFI has.

BTW, I've seen a very fast car with an Iron Duke 4cylinder/5spd, albiet it was a probably 1300lb car.
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Old May 8, 2001 | 09:58 AM
  #15  
Tom 400 CFI's Avatar
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From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
LOL! GhoSSt. That's a good list. I like it.
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Old May 8, 2001 | 10:01 AM
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<font face="Verdana, Arial" size="2">Originally posted by Jza:
Personally, I wouldn't considering the crap rep CFI has.</font>
3 things to make CFI run right.

1) Use an external FPR. (delete internal regulator and accumulator)

2) Switch to a 1227747

3) Switch to matched injectors (65pph from a Caprice)

You'd be surprized.




------------------
Kelly 'GhoSSt' Rosato
1996 Impala SS, 383 LT4 (14.65 up here, 13.24 lower)
1984 Firebird, +.060 350 (Vortech Heads, HOT Cam, and schtuff)
1993 Caprice, 5.7 TBI (stock . . . FOR NOW)

"And if you wrong us, shall we not revenge? Revenge. The villany you
teach me, I will execute, and it shall go hard but I will better the
instruction."

Shylock in Act III, Scene I of 'Merchant of Venice' by William Shakespeare
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Old May 9, 2001 | 02:20 AM
  #17  
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From: Tinker AFB, Ok USA
I am new here so I'll give everyone the run-down on my car first. I have a 83 Camaro Z28 with 700R4 tranny (auto) and CFI. I have put in a Hypertech chip, coil, and 160 therm. The car came with no air so we're tearing the rest of the a/c out. It has an eletric fan that turns on at 200 and off at 190. The car runs great, but I have a couple problems. One being it runs really cold, has problems getting up to the first line on the temp gauge. Since we;'re considering getting rid of the whole CFI I thought everyone could give me some opinions. I don't want to go to a 350. I'm considering these two things. First, I'm opting to put in a cam, headers, and gear drive leaving the rest as it is. HTe other option I have come up with is more complicated and I need feedback on it, and if it is worth it. I would like to continue off of the above by switching the CFI over to a new intake with a Holley double pumper. I would get rid of the computer stuff and go back to maunal adjustments and a new distributar too. I am used to working more on 60-70's cars and the older engines that aren't computer-controled. I would also be switching over to 1.94 heads possiblly 2.02 but I think htat might be too much. I would like to keep the 305, but I also plan to switch ot a 350 next year. Give me some feedback. Thanks.
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Old May 9, 2001 | 04:26 PM
  #18  
f41camaro84's Avatar
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From: wareham mass
i've been thinking about a high performance carb for my car. the only problem is that i must pass emmissions. i'd probably need a new quadrabomb? what do you guys think? or should i try the CFI even though it needs lots of work?
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Old May 9, 2001 | 09:03 PM
  #19  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Ghosst, I like the list but it still hasn't convinced me. You talk about CFI never coming with the 'peanut' cam but that means nothing since he's not using an L03. Everything else is asthetics and nothing is realistic. If I wanted to go for funky looks then maybe CFI would be cool.
My list would start with:
1. TBI is cheaper
2. TBI can be made to run better than 14.5 (NJ speeder 305 w/ stock TB etc. runs 14.3 ha)
3. TBI can use carb intake manifolds with a simple adaptor plate
4. I can stop here, no need to go on and on
About VATS: Don't make me laugh. If you think that's a hold back then I recommend you never do an engine swap. If you need help bypassing it just e-mail me. I'm not suposed to post the $.59 part name you need to get around VATS.
Now my responce to Ghossts other list:
3 things to make TBI run right.
1.) Recalibrate TPS and IAC (KEEP THE 1228746 ecm!!!!!!!!!)
2.) Change TB to 454 unit with injectors to match your engine
3.) Ask me to burn you a chip for cheap and you'll run like a carb but without driving with 2 feet to the stop light!
2.)


------------------
, Jon (350 TBI!)
91 Red My website
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Old May 11, 2001 | 12:01 AM
  #20  
Tom 400 CFI's Avatar
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Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
Dude, I hate to tell you, but if NJ replaced his LO3 injection with a CFI unit, his car would run as fast if not a bit faster.

As for your incorrect point about the CFI being more expensive to modify, think about these two points; I have hardly spent a dime on any of the mods I have made to my intake, or boring my TB's.(which ,by the way you can't even do)
The second point about money is this; look at my 1/4 mi performance. I have spent LESS than $1500 on ALL MY PREFORMANCE MODS. I bet NJ has spent more than that. And I bet you have too Jon. No offence to anyone, I think Tim has done a good job with his car to date, but I don't think you should bash an intake you are not completely familiar with.

I DO NOT love CFI, but it has not done me wrong yet. I would not trade carb for it, I would not trade a conventional TBI for it, Nor would I trade a TPI for it. The only thing I would SPEND THE MONEY on to replace it with would be a Accel/Lingenfelter Super Ram, or a Mini Ram.

------------------
'83 Trans Am: 400 CID oil burning junkyard long block, 224/234 crane cam, Summit aluminum roller rockers, hand ported intake, home bored 2.09" (53mm) throttle bodies, MSD 454 injectors(75 lb/hr), Holley 255LPH fuel pump, custum modded FPR, Edelbrock TES headers, SLP 3" stainless steel cat back, stock ECM & chip. Borg/Warner T-5 World Class, 12" Corvette rotors and clipers, GTA 16" wheels, South Side Machine subframe connectors, 1LE sway bars, 3.45 ring and pinion, Alpine sound.
Best E.T. 13.532
Best MPH 102.24
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Old May 11, 2001 | 07:16 PM
  #21  
super chevy's Avatar
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Here's a link to the Weiand Crossram/CFI unit going in my '68 chevy truck. Bought this off eBay last month. Already has the 7747 ECM upgrade. I'll see how it works when I bolt it on next month. I was going to put it on a 406, but have decided to go with the stock 350 now in the truck.
I'm open to any and all suggestions on mods.
Here's the link:
http://albums.photopoint.com/j/View?...371&p=47930584
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Old May 12, 2001 | 08:25 AM
  #22  
f41camaro84's Avatar
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From: wareham mass
is anyone interested in buying the cross fire parts off of me, i don't think i'm gonna use it.
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