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10-11-2017, 10:09 AM | #1 |
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Location: western Mass
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Moving on from the cracked block to an undocumented rebuild
Hey guys, I'm a member of some Facebook flathead groups and on the same day that I found my "old" motor was cracked in the exhaust ports i happened to see a post about a motor that was supposedly fresh ready fire. I went to look at it last night and it was as advertised. pulled the pan and she was clean as a whistle. pistons and valves brand new. looks to have stock EAB cam and johnson adjustables in it. .040 over with 3 3/4 stroke. guessing it has stock type 4 ring pistons also.
here is my current thoughts... should I leave it as is and swap my edelbrock heads and offy 2x2 over and just run it, or should I pull the cam and swap it?? this is going in my 28 roadster and the cracked motor I pulled out was a .030 bored 3 3/4 stroke with an isky 77b cam. otherwise exactly the same as this one. never really felt it lacked power before. I'm kinda leaning towards just dropping it in. |
10-11-2017, 10:36 AM | #2 |
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Re: Moving on from the cracked block to an undocumented rebuild
I would run as is at first to verify it is good. You can always change out stuff later. Easy to get the motor in and out of a model A so it wouldn't be a big deal.
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10-11-2017, 11:10 AM | #3 |
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Location: western Mass
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Re: Moving on from the cracked block to an undocumented rebuild
I was thinking of putting it on a run stand before I install it because I cant get a torque wrench on the heads when it's in the car.
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10-11-2017, 11:19 AM | #4 |
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Re: Moving on from the cracked block to an undocumented rebuild
"If it ain't broke, don't fix it". I would initially keep the stock cam, especially since it's an "EAB". After some study and a little reflection, I left the stock "OCM" cam in the Merc engine in my '51 after initially planning to put in an aftermarket cam. The fact that this is a heaver car was what swayed me.
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10-11-2017, 01:08 PM | #5 |
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Re: Moving on from the cracked block to an undocumented rebuild
The EAB cam was a pretty good improvement that followed fuel quality improvements of the time. A light body car like that should still perform pretty well with decent reliability to boot.
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10-11-2017, 01:42 PM | #6 |
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Re: Moving on from the cracked block to an undocumented rebuild
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I would then put that Isky 77b in it since the new engine has adjustables and run it again. I think you'll get more lope than stock. or yeah, just drop it in and go for a drive. Chances are you won't take it out again though because you're having so much fun with the car.
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10-11-2017, 02:40 PM | #7 |
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Location: western Mass
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Re: Moving on from the cracked block to an undocumented rebuild
Along with the 77b I have this max 1 on the shelf. One lobe looks a little rough? Thoughts?
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10-11-2017, 02:41 PM | #8 |
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Re: Moving on from the cracked block to an undocumented rebuild
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10-11-2017, 05:06 PM | #9 |
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Re: Moving on from the cracked block to an undocumented rebuild
Boy those are big lobes.
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10-12-2017, 07:52 AM | #10 |
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Location: western Mass
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Re: Moving on from the cracked block to an undocumented rebuild
sorry about the size... not sure why the forum doesnt resize them.
anyway... I've been informed that the max 1 cam is not worth using. I still have the 77b but I'm considering keeping the cracked block it is in together and running some stop leak through it for another project. The 28 roadster needs to be done right though so a motor I depend on is key. so if I buy a cam what would you run?? this is a .040 over 239. what cams can use stock ford valves and springs?? i'm guessing with the small motor I don't have to go to a cam that would need chevy valves and better springs?? just trying to weigh cost vs performance and sound |
10-12-2017, 09:04 AM | #11 | |
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Re: Moving on from the cracked block to an undocumented rebuild
Quote:
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10-12-2017, 10:05 AM | #12 |
Senior Member
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Location: western Mass
Posts: 365
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Re: Moving on from the cracked block to an undocumented rebuild
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10-12-2017, 10:09 AM | #13 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: Moving on from the cracked block to an undocumented rebuild
I see the words "depend on" in your post. Since you already have the EAB, I think that changing the cam (especially to a regrind with a smaller base circle) would be a waste of time and money.
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10-12-2017, 10:23 AM | #14 |
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Re: Moving on from the cracked block to an undocumented rebuild
I agree with tubman
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10-12-2017, 12:49 PM | #15 | |
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Re: Moving on from the cracked block to an undocumented rebuild
Quote:
rest of the bolt on items are mallory dual point from 1991 offy regular dual intake with two 97's edelbrock heads that I will make sure are at the recommended .040 clearance 39 trans with ford gears and a 3.78 banjo 11" truck clutch |
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10-12-2017, 03:06 PM | #16 |
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Re: Moving on from the cracked block to an undocumented rebuild
A lot of folks like the L100 grind from Kiwi Kev.
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10-12-2017, 03:46 PM | #17 |
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Location: Wichita KS
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Re: Moving on from the cracked block to an undocumented rebuild
I would for sure replace the 11 inch clutch setup! I would go to a 9 inch or a 10inch at least. That 11 inch will really hurt performance.
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10-12-2017, 04:23 PM | #18 |
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Re: Moving on from the cracked block to an undocumented rebuild
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10-12-2017, 07:26 PM | #19 |
Senior Member
Join Date: Nov 2012
Location: western Mass
Posts: 365
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Re: Moving on from the cracked block to an undocumented rebuild
Ok.. pulled the timing cover off and what I thought was an eab cam based on the casting is stamped as an 8rt...
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10-12-2017, 07:29 PM | #20 |
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Re: Moving on from the cracked block to an undocumented rebuild
OK, I give you permission to change the cam.
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