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Opinions on Crane F238 cam needed

May 18 2004 at 8:01 AM

Danford1  (Login danford1)
Member
from IP address 136.2.1.153

What are your experiences and opinions on the solid flat tappet Crane F238 cam?
Here is a link to specs. http://www.cranecams.com./?show=browseParts&lvl=2&prt=5&Vehicle_Type=Auto&Cylinders=8&Engine_Make=FORD-MERCURY&Year=1972&Engine_Size=351-351C%20C.I.&partNumber=441161&partType=camshaft

This is for a mainly street, occassional strip car. 4:11 gears and AOD trans with 2800 stall. X-Celerator, 2v Open heads milled 0.050", 0.030" over block decked 0.025", about 9:1 compression, both 650 DP and 750 VAC Hollies, Hooker Super Comp headers.

What is the idle like? smooth, lopey or just a burble?
How is this cam for street driving?

Any and all comments appreciated. I know I'm going to hear to call Mark for a custom ground cam. I know it would be much better. Let's for this post stick to the garden variety, off the shelf, F238 cam.

Cheers.
Danford1

 
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AuthorReply

Chris Kelly
(Login Falcon67)
Member
64.216.57.67

Shelf sticks

May 18 2004, 8:52 AM 

If forced to pick a shelf grind, I would personally prefer this one - the Powermax 238/248, part # 521141.

http://www.cranecams.com./?show=browseParts&lvl=2&prt=5&Vehicle_Type=Auto&Cylinders=8&Engine_Make=FORD-MERCURY&Year=1972&Engine_Size=351-351C%20C.I.&partNumber=521141&partType=camshaft

I haven't run it, but I do have one on the shelf. I'd love to stick it in my 2V engine, but I just don't trust the spindly little studs in the Crane conversion kit. But, the required springs are not really that wild. And my compression is too low.

It'll have a bit of a lope to it. The main problem is that 9:1 is not nearly enough compression for these cams. 10:1~10.5 is mroe like it. My 226/230 hydro has only 145 PSI cranking pressure with 9.3:1. A 238 solid is going to have even less. With 9:1, you might be in the 130 PSI range. Not a lot of low end with that.

1967 Falcon 4 door w/351C
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.

 
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glen
(Login tinman351)
Moderators
68.79.59.214

i'm running the 521141

May 19 2004, 6:02 PM 

238/248, with triple springs, open chambers and flat tops. no decking that i'm aware of? it doesn't exhibit any symptoms of low compression, other than that it will run without issue on 89 goat piss straight from the pump. lopey idle, rumpity rump all the way up to roar. it'll tach past 7k if you let it. maybe it would benefit with more compression? for now it makes the lifters go up and down. definately lets you know it's got a cam.

 
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Brenden
(Login brenx)
Member
210.50.248.181

It should work well with your setup

May 18 2004, 9:10 AM 

Try and get compression about 10:1.

My mate has one in his 351. It's got a nice semi sedate idle, pulls quite hard. My mates got 351, weiand xcellerator 2v, 2V closed chamber heads 10.5:1,750dp holley, 3000rpm histalled C4, 4.11's.

Untuned it goes very well it's due for a dyno as it's just finished running in.

Brenden

 
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Anonymous
(Login xdesp351)
Member
203.220.94.59

Re: It should work well with your setup

May 19 2004, 8:50 AM 

I was gunna ask the same question but what do you reckon if it was running 2v cc heads chambers opened up to 62cc's zero decked flat tops same intake and carb as Danford's? Or a set of AFD 2v's? cause a mate is stepping up to a f246 and offered the f238& lifters with very little use for a good price, worth a shot or give it a miss?

 
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Danford1
(Login danford1)
Member
136.1.1.101

To bad your over in another country...

May 19 2004, 9:01 AM 

If you were in the states where shipping would be faster and cost less, I know someone that might buy that F238...

You could call it an experiment. Buy it and report back here in great detail with the results

Danford1

 
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adrian
(Login adricar)
Member
82.36.196.109

f238

May 19 2004, 12:45 PM 

hi i have just fitted one of these cams to my 351c, it has boss 302c heads with a high port conversion. so i would be interested how everyone else gets on with there combination. please let me know.

 
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Brenden
(Login brenx)
Member
210.50.200.98

If you've got the driveline combo it'll work with

May 19 2004, 8:20 PM 

2v's and/or AFD heads. I still run an F246 copy. I used to run 64cc 2v heads without issues (10.5:1 compression, pump fuel). I now run the same setup with 60cc CHI alloys running 11.2:1 compression (pump fuel).

If your cams not up to scratch or the engines not performing like you want it to? An F238 should liven things up.



 
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Jason
(Login nosaj122081)
Member
24.210.118.234

Re: If you've got the driveline combo it'll work with

May 19 2004, 8:50 PM 

How'd you like the F246-style cam with the small chamber 2V's? I'm doing a similar setup, ported Aussies, Funnelweb, 4 speed and 3.89's, and was worried that Comp's version of that cam was gonna be too wild to do any street driving.

-Jason

 
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Steve
(Login 70machwun)
Member
209.60.96.136

F246 is not too wild for the street

May 19 2004, 9:24 PM 

I have that exact comp cam which is practically identical to the crane F246 and I don't think it is too wild for the street at all. I have a 4-speed and 3.89's, blue thunder intake and 650 mighty Demon. I also run power brakes. I am still tuning things but it is shaping up to a really nice combo.

Steve

 
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dion
(Login xdclevo)
Member
203.220.189.12

I'll let you know..

May 20 2004, 5:20 AM 

I run the F246, but it is yet to crank up. Will be this, or next weekend. The auto is in the shop, so still a few weeks for that. My mate runs a F246 in a full sized XD falcon which does 11.6 over the 1/4. He has 3500 stall, and 3.9 gears, Its is still great on the street too.

 
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Brenden
(Login brenx)
Member
210.50.41.77

Definately not wild enough

May 21 2004, 2:11 AM 

It's just a nice street/strip cam with a lopey idle. Mine idled @ 900rpm in drive. Mate of mine had one in his 351 and it was sedate as every behind a manual box.

I am going larger and still retaining street use but I aint in any hurry to do it yet.

 
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John
(Login 77351)
Member
150.101.125.56

Not for your setup

May 21 2004, 7:30 PM 

not enough comp, Danford.
John

 
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Brenden
(Login brenx)
Member
210.50.248.104

10.5:1 is what it was and it now has 11.2:1

May 22 2004, 6:31 PM 

With the alloy heads I got a decent increase in compression and are still able to retain pump fuel. I dare say for my setup there's plenty of compression. Still ran a 12.95@105.96mph with blown auto with basically no top gear. It can't have been too bad


 
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