383 with Eddy heads!

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petreed150

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Ok guys,I almost have my smallblock 318 done for my 83d150!Now my wife bought me a 68' 383 block with standard bore and crank.This is gonna be my next motor for the truck.Here is the build i have in mind!
1.Block bored .030 over with reworked rods and KB400 pistons.
2.84cc eddy rpm heads with phase1 port job and stock stamped rockers with 10.1 comp.
3.Eddy RPM intake
4.Horlley 750 dp
5.727 with 2500 stall and truck has 8.75 with auburn sure grip with 4.10 gear.
Choice of cam is between Voodoo 60303 or XE274 cam,which one as this is heavy truck?I know this is not an abody but all i have.Any help is appreciated.Thanks
 
Purchase new rods since there stronger and cheaper than re-worked OE rods. Make the stretch if you can to roller rockers, Hughes engines has reasonable prices for them.
 
I am gonna buy parts slowly,so roller rockers can be used but I am gonna order cam first!I think i'll stick with comp since i gonna be running xe268 in 318,so I am leaning toward xe274 or xe275hl!Any thoughts?
 
I assume this is gonna be a street/strip or fun type truck. If it's gonna be more of a truck/truck then the Eddy heads might be a bit of overkill IMO.

As far as cam selection, tire size would have to be part of the equation even with a 4.10 gear, with a pickup you could use a wide range of sizes.
 
Now, that sound like a fun ride. Looked at the Comp. specs and they are close. I would think with the Eddy heads and a good cleanup could easily use the extra lift, so i vote for the 275HL. A true 25/2800 converter with a good advance curve and a carb that's not too big, maybe 750ish should give you decent drivability even with that weight and would still really roll when you turn it lose. Just one opinion, hope you get some more. In the mean time, have fun with that 318. Good luck to ya. :thumleft:

Sorry i missed the 750dp in your list. Don't discount a 750 vac. secd. When they are tuned properly can still perform
and might actually help in launching a fairly heavy vehicle.
 
Yeah should have the 318 back and in at end of month.I gonna run it for awhile and piece the 383 together slowly!Now if the eddy heads are too much for it i can go with cast heads but reason i said eddies is so i can get compression up.KB162 pistons would only yeild me 9.1 but kb400 put me at 10.1.Want to be safe with pump gas.
 
Neither of those cams will probably bleed of a tons of comp. but with the alum. heads and you may be able to play with gasket thickness a little bit to get you where you need to be. Still not exactly sure about the weight factor in all this. Guessing your gonna be about 4500 lbs. wet. Hope someone else will chime in who has more firsthand experience with this, I'm curious too?
I'll give ya a bump every now & then and we'll see who can chime in.
 
Well, being that the truck will see the 383, I would not worry about the torque output to much though I'd go with the Lunati, since your asking. I myself would go with a 1.6 rocker as well. Take advantage of the head flow for a few more ponies.

XE275HL with 1.6 rockers makes a great street beast cam. Big or small block w/Edel. heads. Cam lift goes to .560, right where that head flows best...at least for the small blocks.
 
Not advise, just play time cause i'm bored :smile:.

Get a few bucks for the 383 crank if it's good.
Drop back to 9.1 comp.
Save a few bucks and clean up a set of iron heads.
Buy the most common, least expensive stroker kit...probably 470ish range.
Maybe could even lose a little gear...3.73
And torque your a** off.

Don't forget a BB trans will be in your future also.

Just bench racin' here.....
 
rumblefish360 said:
XE275HL with 1.6 rockers makes a great street beast cam. Big or small block w/Edel. heads. Cam lift goes to .560, right where that head flows best...at least for the small blocks.
Click to expand...
I wouldn't base any selection for the 383 based on what worked in a small block eddy head since the B/RB head is a completely different animal with different flow characteristics. JMHO.
 
I would not either but then again, if you look closer, you might be inclined to agree based on how the head flows and both are short stroke engines. Go to Edelbrock.com and bring up both heads in separate windows and look at the head flow and where they start flow the most. The cam lift gets into the best flowing area of the head.Note, not max. flow area.

VIA your statement, it is a correct view, but narrow.
 
Hey Rumblefish,Do you think the voodoo 60303 be good choice?I was afraid it would be too small for the 10.2 comp.What would the lift be with 1.6 rockers?
 
Are the Edelbrock heads a closed chamber design? The closed chamber is supposed to help with detonation, as does the aluminum construction. I have 9.97/1 with closed chamber iron heads, and a much smaller cam, and it seems quite happy on pump premium.
 
PeeTreed, I made a mistake when I clicked on the Lunati web site. I clicked the 04 cam, not the 03 cam. The one you list would work. Though the duration is short, you would just have to time it well. The distributor would need to be dialled in right and the carb would need some good attention. The combo of these two parts, the carb and distributor need to work together well on a small cam in a high compression engine. Or a cam on the smallish side and a 10-1+ engine. Iron or aluminium head. The aluminium helps the issue.

The math works like this;

Intake;
.494 /1.5 = .32933333333-------
.3293 X 1.6 = .5269 (Round off to .527)

Exhaust works out to be .547

On cam size, considering that the 383 is moving a lot of weight, your duration can not be to large. If you start to move up in duration, then you will need more stall and possibly gear. Though 4.10's are a good gear for a weighty truck.

More duration equals higher RPM band. Can you afford this?
The more lift you have has a direct impact on HP. The better the head flows, the more HP you can add. (Though I have noted it isn't much unless your engine is a race set up. Even then, it is only a few ponies over a lower lift cam.)

IMO, it is better to get the duration right over the useable lift a cam is ground with.

IF you think you can get a way with more duration, the next step up is as far as I myself would go in the Voodoo (60304) or Comp Cam (275HL)
http://www.lunatipower.com/Product.aspx?id=1580&gid=287
(.547/.568 lift w/a 1.6 rocker)
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=711&sb=2
(.560 lift w/a 1.6 rocker)

For myself, this is more in line spec. wise with what I would like to use with an Edelbrock head in the truck. (or car.)

More cam than this would be a problem with the build parts listed. I think the converter would be the first issue next to the trucks weight.
 
BBBCUDA said:
Are the Edelbrock heads a closed chamber design? The closed chamber is supposed to help with detonation, as does the aluminum construction. I have 9.97/1 with closed chamber iron heads, and a much smaller cam, and it seems quite happy on pump premium.
Click to expand...

Yes they are .

What needs to be checked is the KB 400 and compatibility with the domed KB piston.
 
They also have 88cc open chambered eddies.Could i use them?I think my comp would be 9.7 with them!Reason i trying to keep cam on small side to keep the torque up and not overcam.Plus with the 60303 or xe274 i can use the springs that come on the heads,If i go with 275hl comp said i would have to change to dual.
 
The smaller cam with the open heads would be a good set up. IMO at least.
 
My heads flow in the 260 cfm. range around .500" lift, however, my cam only makes about .450" lift, so I'm not using all of them. The good part is, with the tiny cam, and the RPM intake, I can shift at 5,000 rpms., and it will shove my 3,350 pound car to low 12's, even with the high end skip it had. For a short stroke motor, it's making decent bottom end, which might help out your heavier truck.
 
petreed150 said:
They also have 88cc open chambered eddies.Could i use them?I think my comp would be 9.7 with them!Reason i trying to keep cam on small side to keep the torque up and not overcam.Plus with the 60303 or xe274 i can use the springs that come on the heads,If i go with 275hl comp said i would have to change to dual.
Click to expand...

You don't want the 88cc head it's an open chamber head made to be used with step head KB pistons which were not made for the 383 .
 
Thats what i thought.Well i found out my father in law has a set of cast heads that i can get for free.How much difference if use them and have them worked over?
 
Use the KB162 flat top piston and the Edelbrock 84cc head. The increase in airflow that you receive will far outweigh the compression gain with the KB400 pistons and the flow LOSS with the stock head, even if you port it. It will be expensive to get the iron head to flow with the Edelbrock.
 
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