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Old 02-29-2012, 04:29 PM
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i need advice on my engine build

I have a 350 bored 030 over and just recently bought a lunati 286 series cam 489 lift. I am Going to b running mostly on the street with a 4 speed! I need a little advice on head selection and roller rocker ratio. I have a brand new elderbrock performer intake it says its only up to 5500rpm the cam I bought the range is 1800-6200 u think I should use the intake? I want aluminum heads!

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Old 02-29-2012, 05:09 PM
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Quote:
Originally Posted by ccase2727
I have a 350 bored 030 over and just recently bought a lunati 286 series cam 489 lift. I am Going to b running mostly on the street with a 4 speed! I need a little advice on head selection and roller rocker ratio. I have a brand new elderbrock performer intake it says its only up to 5500rpm the cam I bought the range is 1800-6200 u think I should use the intake? I want aluminum heads!
I was thinking afr 180 or elderbrock e street heads
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Old 02-29-2012, 05:17 PM
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Quote:
Originally Posted by ccase2727
I was thinking afr 180 or elderbrock e street heads
Big difference between the two.
What's the part number of the cam? What kind of pistons are in the motor? Flat-top with valve reliefs, flat-top with a trough, flat-top with reliefs and a circular dish, D-cup, domed or what? How far is the piston down in the bore with the piston at TDC?
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Old 02-29-2012, 05:56 PM
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I don't have a proper micrometre but my tape measure says 3.5 inches at top dead center the cam is 60103 and the pistons have a flat top with four eyebrows or half moons! I'm learning a lot about all this I'm still pretty green! I appreciate all the help!
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Old 02-29-2012, 06:05 PM
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Start off by buying a couple of decent engine building books. I am sure someone here can suggest some. If your measuring 3.5" for your deck clearance you need to hit the books hard. Deck clearance is the measurement of the highest part of the piston at top dead center (when the piston is as far up as it will go, when installed in the block not when your holding it in the air) to the top of the block surface. Get a straight edge and a set of feeler gauges for this task.
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Old 02-29-2012, 06:46 PM
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I don't want crazy power just a nice reliable engine! I bought a half restored project and it came with a short block!
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Old 03-01-2012, 05:15 AM
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What would b a better choice for street and pump gas application?
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Old 03-01-2012, 07:54 PM
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The Edelbrock performer heads have always been a good head for basic street use. With what it sounds like you have, and your experience level, I would think they would be a safe bet.

Mm
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Old 03-01-2012, 10:04 PM
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.........and no offence but when you take it apart and REALLY when you put it back together get an experienced engine tech to help you. If you don't you can screw up all the new parts you bought because it all has to go back togeter properly.
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Old 03-02-2012, 05:08 AM
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Thanks for the advice! I definitely will have somebody that knows what there doing to help! Elderbrock street heads 180cc would it b better to have the 64 cc or 72cc what kind of comp difference would it be?
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Old 03-02-2012, 05:51 AM
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The very first thing you should buy is something like this http://m.summitracing.com/parts/SAD-SA116 before you start dropping thousands of dollars on something that your completely in the dark on!
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Old 03-02-2012, 07:53 AM
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Quote:
Originally Posted by ccase2727
Thanks for the advice! I definitely will have somebody that knows what there doing to help! Elderbrock street heads 180cc would it b better to have the 64 cc or 72cc what kind of comp difference would it be?
To keep things simple and know you will be able to run on pump gas without problems with detonation and pinging, use the 72cc. The 64cc heads will give you more compression, and compression is power if used properly, but with the pistons you have you might have problems with the smaller chamber heads.

Mm
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Old 03-02-2012, 09:07 AM
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Quote:
Originally Posted by Mmfh
To keep things simple and know you will be able to run on pump gas without problems with detonation and pinging, use the 72cc. The 64cc heads will give you more compression, and compression is power if used properly, but with the pistons you have you might have problems with the smaller chamber heads.

Mm
Too low of compression is just as hard to deal with as too high. Its less damaging but makes for lower power and worse mileage.
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Old 03-02-2012, 03:29 PM
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What would b an ideal compression ratio for a pump gas engine? Mileage I'm not too concerened about cause its gonna b a Sunday driver
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Old 03-02-2012, 04:23 PM
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Learn about dynamic compression ratio (DCR) because that will determine if your combination of parts are compatible and will run on pump gas. There are a number of calculators on the net. I like this one:

http://www.projectpontiac.com/ppsite...tio-calculator

It is for Pontiacs, but works well for any engine make. You should also learn about "quench" and what head gasket to use to figure proper quench for your engine.
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