Need opinions on next step for my engine.

[Guest Anonymous]

Current parts collection:

1) 350 block with 4 bolt main and two peice seal.

2) Scat9000 3.8" stroke crank (388 cube).

3) Steel rods 5.7" bushed and prepped.

4) Roller rockers.

5) Vertical locking solid roller lifters and chromoly pushrods.

6) Rev kit.

7) Fludamper

8) Dart aluminum heads (2.06/1.6/72cc chamber.

9) Valve covers and pan (all tin in need).

10) Distributor

 

Need:

1) Intake

2) Pistons

3) Rebuild Kit

4) Solid Roller cam

5) Misc. other I can't think of right now.

 

SO NOW WHAT? Not sure where to go yet with the last of my engine parts. Plan is to run my muncie 4 spd and a 3.73 gear ratio.

[Guest Anonymous]

No help so far far from yall but I narrowed my cam selection to either a custom grind or a Herbert cam. The Herbert is a 244/242 duration @50 with 565/567 lift on a 110 degree lobe center. This will give me good torque and horse power. Peak horse power: 492 @ 6000 rpm, and peak torque of 494 @ 4500.

 

If I go custom grind, the desktop showed after hours of fumbling and learning how cam grinds work that I will get a peak horse power of 506 @6000 and torque of 480 @5000. The grind is a 256 duration @50 with the same lift but a 111 lobe center.

 

that is with a 750 cfm carb. It says I should get about another 5-6 horses with the 850.

 

I know I want a single plane open plenum intake. What I don't know is if I want the Team G or the Victor Jr. or the one the Dirt Track THunder sells that is a knock off of the Super Victor. The cost new of the Dirt Tr. TH. one is only 120 plus shipping. The others are up around 165 or so. The only thing I don't like about it is that its RPM range is a little higher.

 

Sorry if I rambled but I thought maybe I got no input cause I ask a poorly worded question. Any input on what I should do or think about would be helpfull.

[pparaska]

I'd say that with a cam with that much duration, you want probably 10.5:1 compression.

 

Sounds like a heck of a setup!

 

I'd imagine 6500 would be a reasonable redline with that stroke. The Super Victor or something that performs like it may be too much, maybe a Victor Jr. would be just right?

 

I like the idea of a good solid roller cam.

[DavyZ]

I have to echo what Pete said on all points. Ditto on the Victor Junior manifold too. The way you have described your setup with the proposed cam, I would think that 11:1 compression or even higher would be recommended. It would be interesting to hear what Grumpyvette has to say about it.

 

I personally would run a shorter duration cam and go with a Victor Junior manifold, but that's just me.

 

Davy

[Guest Anonymous]

Exackty what I was going for . I fugured on 10.0 to 10.5 and pump gas. Girlfriend's dad runs beefed 408 and 11.1 on premium. May change plans for compression though cause I was talking to a guy today about his turbo setup off a 81 trans am. Draw-through setup with no electronics and a wastegate. I don't know jack about turbos but with a 8.0 compression the weakest turbo on Desktop says 600 hp and lots more of torque. Doubt I will do it but if it is cheap enough I would consider. The shorter duration cam listed previously is the cam that dad has now in the 408 and he wants to have me buy his so he can go bigger.

[Guest Anonymous]

damn I spell like krap when I am in a hurry to rite sumthing

[John Scott]

I'm curious about what our resident engine guru will say too. I'd guess the Vic.Jr would work pretty well with that duration and rpm. According to what I've researched, it offers a better range of rpm than you'd think. I'm figuring around 246/8 duration 11.1:1 with aluminum heads to be at the pump gas limit at our skinny air altitude, 91 octane. Using forged pistons just in case. Might want to consider your local octane, compression, and air density. On the computer dyno the hp #s get bigger with the high compression. Make sure you can use it. Do you really want to be blending race gas, or shudder, additives?

JS