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Author Topic: Fuel injected cam in a carbed engine  (Read 9402 times)
SlickTang
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« on: December 18, 2015, 11:03:14 pm »

Im hoping to get educated on the differences in a fuelie and carb'd cam. I like the looks (and reviews) of the CompCams XFI236 5.0 stroker cam,but everything about it says its for fuel injected cars.

What would be the pros and cons of running it with a carb?

Specs are:
236/248 @.050
.579/.579 w/1.6's
114 lsa
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« Reply #1 on: December 18, 2015, 11:34:21 pm »

EFI cams typically work fine in carb applications. Using a cam designed specifically for a carb on a EFI engine could cause some tuning difficulties, depending on the EFI system.

The reality is that a custom billet cam is ~$80 more. Then it is made for your specific vehicle and is on a superior billet core.
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Doing more with less, or something like that.
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor

I honestly don't get it.

I'm sweating, my heart is racing, my clutch foot is twichin', and my right arm punched the computer screen doing an involentary 2-3 shift while reading all that. 
SlickTang
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« Reply #2 on: December 19, 2015, 12:05:42 am »

Thanks man. Cam is next on my parts list, I've got my heads, intake and carb.
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David Claflin
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« Reply #3 on: December 19, 2015, 07:22:37 am »

There are some differences depending on the cam, or who spec'd it. I think some guys will use a later intake valve opening if you've got a long runner intake. Others will go with an early intake valve opening in order to get it to peak quicker.
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Mr.Blue
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« Reply #4 on: December 19, 2015, 02:26:31 pm »

I'll say it again...B cam....works with carb, efi ,tbi ,cfi ,tpi ,sefi ,bank fire ,Big stuff , FASTefi, Holley efi, VV carb ,nuclear fision , turbine ,jet propulsion, hyper drive ,warp drive and flux capacitor.....................its the best came ever made or ever will be made................case closed!

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Rodney Tolleson/VP SBFTech van club
SlickTang
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« Reply #5 on: December 19, 2015, 02:34:54 pm »

But the pic is funny,  and reminds me of guys that ask " 'at thing got a cam in it?"


On a more serious note, I was asking to actually learn the differences, because many ots grinds specifically say fuel injected.

Edit: If you really like them that much Blue,  Ive got one in the parts pile. Maybe you could put it in your rape van?
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Mr.Blue
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« Reply #6 on: December 19, 2015, 02:41:48 pm »

Wish i could help but i'm a dumbass...just do comic relief...i'll be here all week
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Rodney Tolleson/VP SBFTech van club
SlickTang
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« Reply #7 on: December 19, 2015, 02:44:11 pm »

Thats cool, I dig your van project anyway lol
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Joel5.0
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« Reply #8 on: December 19, 2015, 06:46:12 pm »

 LMAO on floor

WTF defines an EFI or carburetor cam?  Anyone?
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SlickTang
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« Reply #9 on: December 19, 2015, 07:17:38 pm »

Thats...... Insightful Joel. Im sure glad I came here to learn lol
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David Claflin
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« Reply #10 on: December 19, 2015, 07:38:55 pm »

Edit: If you really like them that much Blue,  Ive got one in the parts pile. Maybe you could put it in your rape van?
I was looking for one to put in my car, more of a tongue in cheek than anything, bound to be better than the stocker I'm using.
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
juiced coupe
Six figures worth of don't give a f*ck
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Location: Pascagoula, MS
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« Reply #11 on: December 19, 2015, 08:35:20 pm »

WTF defines an EFI or carburetor cam?  Anyone?

I was speaking more from a general term. But carbs are more tolerable of aggressive cams than most factory and some aftermarket efi systems.

With few changes, a carb generally doesn't care if a engine makes 6" or 16" of vacuum. Thats definitely not the case with most efi systems, at least not without professional help.

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Doing more with less, or something like that.
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor

I honestly don't get it.

I'm sweating, my heart is racing, my clutch foot is twichin', and my right arm punched the computer screen doing an involentary 2-3 shift while reading all that. 
SlickTang
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Location: VA

« Reply #12 on: December 19, 2015, 09:08:48 pm »

LMAO on floor

WTF defines an EFI or carburetor cam?  Anyone?


Joel, this is why I asked.  But you basically asked the same thing i was asking from the start.


* _20151219_210705.JPG (264.71 KB, 1440x869 - viewed 204 times.)
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Mr.Blue
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« Reply #13 on: December 20, 2015, 10:30:45 am »

If you really like them that much Blue,  Ive got one in the parts pile. Maybe you could put it in your rape van?

Dude....i'm just trying to get into the high 8's not pop wheelies and run 7's.........i tell ya..some people sheesh!
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Rodney Tolleson/VP SBFTech van club
SlickTang
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« Reply #14 on: December 20, 2015, 11:16:20 am »

If you really like them that much Blue,  Ive got one in the parts pile. Maybe you could put it in your rape van?

Dude....i'm just trying to get into the high 8's not pop wheelies and run 7's.........i tell ya..some people sheesh!

The van doing wheelies would be an awesome sight though!
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