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  #1 (permalink)  
Old 11-27-2003, 12:23 PM
84 Z28 Convertible
 
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Critique my SBC 400 Combo

This is a street engine going into a sbc 84 Z28 Camaro convertible.
My SBC 408

Engine: 400 SBC ID# 330817/14y139664/ T0508CSU
(4.125 bore X 3.750 stroke) after .040 bore (4.165 bore x 3.75 stroke =408)
Deck Plate Bored, Mains Align Honed, Block Deck .002, Deck Plug Holes & Tap w/3/16 Holes, Starter Bolt Drilled, Front Three Gallery Plugs Tap for ¾ Pipe Plugs.

Crank: Scat 9000 Crank 3.750 6.00, Internally Balance, Part# 400-3750-6000

Bearing: Clevite– MS1038P Mains and CB663P Rods

Piston: Wiseco Pistons, .040 over, 5.4cc; 430 grams, Part# PT020H4

Rods: Eagle ESP 4340 H-Rods 6.0, Part# CRS6000B3D

Block: Zero Deck: 0.002

Compression Ratio: Static-10:44 Dynamic-8:27

Cam: Grind: Solid Lunati/ (Recommended by Harold Brookshire)
280/284F10 .525/.530 Lift, 247/251@.050, 159/162 at .200, .560/.565 valve lift(1.6), Beats the Comp Cam 294S hands down. Pro-Street power with an extra 5* at .200"
2500-7000 RPM, Advance Cam 4* Degrees as Per Harold, .026" Valve Lash Hot, Adjustment Range: .018" to .030" Hot.

Heads: AFR 195 Part# 1035 w/23º valve angle, 74cc, drilled steam holes
Springs for Solid Cam- 130-135 Seat and 325-330 Open 280/284F10

Head Gasket: Fel-Pro-1014 / .039 in. compressed thickness, 4.200 in. bore, 9.0 cc compressed volume

Intake: Edelbrock RPM #7101

Carb: Holley 750

Rear End Gear: 3:73

Transmission: Pro-Built Street/Strip 700R4

Stall Converter: A.C.T. 3000 Stall

Exhaust: Hooker Super Comp headers 1 5/8 Headers part # 2460-1 ceramic coated;
Hooker Super Competition high flow cat-back exhaust system, Intermediate pipe: 3 in.
* Tail pipe diameter: 2 1/2 in.
* Dual tail pipes out the rear under the bumper

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  #2 (permalink)  
Old 11-27-2003, 12:25 PM
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That cam is going to make it pretty lumpy. Overall it should be fast.
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Old 11-27-2003, 12:32 PM
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I must say, you have done your homework. I dont see anything wrong with the combo. One piece of advice I can offer, is that the larger cube small chevys usually like an open plenum intake over the dual plenum. I would suggest a victor junior with that combo, but the RPM will also work. The thing is that with 3000 stall you are really not going to need the low RPM advantage that the dual plenum offers.

Later,

Chris
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Old 11-27-2003, 02:18 PM
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You are gunna show taillights to lots of drivers!!!
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Old 11-27-2003, 03:24 PM
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You do need to go to a single plane intake.you are hurting yourself with the dual plane.Over all sounds like you have a really hot sbc.By the way if your sixty foot times suffer a little you can always go to a 4.10.With the 700r4 in first with 4.10 makes it 5.13 and one hell of of a launch plus still haveing hwy cruzin abilty.
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Old 11-27-2003, 06:00 PM
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They're right about the single plane intake. Engine Anylizer shows 459 vs. 446 @4500 torque and 422 vs. 395 @5500 hp. Just info........

The Vandal
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Old 11-27-2003, 06:05 PM
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agree with the intake. Not a 406 rather a vortec headed 350 bored .040......performer rpm intake turned mid 12.60's @ 105. changed to a super victor and that's the only change, ran 12.24 and 12.25. @ 110.
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Old 11-27-2003, 06:25 PM
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You would make better power with better heads, Brodix or better.
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Old 11-27-2003, 08:11 PM
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Quote:
Originally posted by johnsongrass1
You would make better power with better heads, Brodix or better.
So you are saying that Brodix heads flow better then AFR's? I don't think so.
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Old 11-28-2003, 01:47 AM
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Your AFR heads will be ok. You did balance the rotating assembly? Your combo looks good to me. The only thing you might have done differently would be a roller cam. This thing should really haul *****!!!
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Old 11-28-2003, 07:56 AM
84 Z28 Convertible
 
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Quote:
Originally posted by dirtracer21inc
Your AFR heads will be ok. You did balance the rotating assembly? Your combo looks good to me. The only thing you might have done differently would be a roller cam. This thing should really haul *****!!!
The rotating assembly will be balance within a 1/2 gram. The roller cam was so much expensive so that why I went with the solid cam hoping to get close to what I can get out of a roller.

The cam should not be too lumpy in a 409 according to Harold, however it should move this heavy 84 Camaro.
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Old 11-28-2003, 08:40 AM
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The only thing I see that might be reconsidered is going up to 1 3/4 primary headers.
But that would have to be warranted by the primary use of the engine, which has probably been done.
The rest is well thought out.
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Old 11-28-2003, 10:54 AM
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I would have to agree that AFRs are definately the best way to go, you will be very happy with them. Out of the box, they will outperform any other head that is the same size. The only contenders may be the dart pro 1 cnc ported heads, or trick flow twisted wedge R heads. Both of these heads flow similar to AFR on the intake, but AFR signifigantly outflows them on the exhaust side, and they cost just as much as the AFRs or more. If you do decide to go with the single plane manifold, I would go with a 3500 stall at least. That will get you into the power band quicker and make up for any lost bottom end torque.

Adam
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  #14 (permalink)  
Old 11-28-2003, 12:34 PM
84 Z28 Convertible
 
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I will just have to try this combination of parts with what I have now because I already have them. The only thing left to buy are the AFR heads after Christmas. I cannot afford to change these parts out at will, but I will keep the recommendation in mind once I need to make a few changes later down the road.
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Old 11-28-2003, 08:43 PM
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Now the question is if the 84 chevy can handle the torque. I seem to remember people having structural problems with the 80's body cars when they cranked up the HP.

Regards
Mark
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