ESTIMATED HORSEPOWER

[miked24]

I was curious if someone could help me in estimating how much horsepower I'm gonna be putting out? I have tried the different computer programs without much success, and this being my first engine to build. I started out buying a 454 that had been bored .30 over. The engine was running but the guy was going alot bigger so I got a great deal on it... I think. I got the complete engine plus a set of brand new in the box alum Edelbrock performer heads. Oval port 100cc chambers with 2.19/1.88 valves (part number 60499 in Jegs). I do understand that they prolly are not the best choice but I paid $2000 bucks for all this stuff. Also included in this is a set of hyper .40 over pistons, so the block is at the machine shop gettin a trim to .40 over. It also came with a pretty new 750 holly carb sitting on Edelbrock performer RPM intake (part# edl7161) that I'm gonna use. A Stock crank turned 10/10 with I beam rods is reuseable too. Now I'm looking at buying a Comp cam 227int/241exh with .479int/.465 lift hydraulic flat tappet. I'm installing all this in my '85 Z28 behind the engine is a race built 700r with a Saturday night special stall with a stock rearend that will prolly get blown apart and replaced with a 9inch.....thats all I can think of if you have any assistance i appriciate it .......Thanks

[blowninjected540]

What compression are the pistons n?

[miked24]

I think it's gonna be 10:1. I wanna stay on 93 octane so I hope that's where it will be at

[chevynovaman]

I WOULD SAY AROUND 400 HP OPINION GOOD LUCK

[miked24]

I just bought a different cam today instead. It's a Lunati Barebones cam and lifter kit. The schematics are 290/300 duration @.050", 224/234 gross valve lift (intake/exhaust), .527"/.533" Lobe seperation 112 intake centerline 107, rpm range 1500-5500. Part number is 10202lk

[BEAST477]

That's quite a change from your previous cam. Your going to want to make sure you have enough valve to piston clearance.

[miked24]

Well I got a good deal on it I thought $125 bucks. To be honest I didnt think it was that big of a difference .. me being a rookie and all.....But I guess if It doesnt work Ill repost it on ebay for sale. But my block hasnt been decked (or at least thats what i was told) and the heads havent been shaved either. They are new, but how would a guy like me figure this out???

[BEAST477]

You will need to assemble short block with crank, #1 rod and piston, cam and lifters for #1 cyl, one head and head gasket and rockers for cyl #1 with clay on top of piston, set valve lash and roll engine over by hand. Take head off and check the thickness of the clay on the intake and exhaust valves for clearance.

[miked24]

OK great advice .... thought it would be more technical than that. What is a good thickness of clay to be left on the piston? BTW love the paint job on your profile picture

[BEAST477]

Probably about .125-.150 would be good. You want to end up with about .100 clearance on the intake and .120 on the exhaust.

Thanks on the paint.

[miked24]

COOL THNX

[miked24]

Well I would send you guys sum pics of what its going in but I'm jus about as ignorant at that as i am building engines

[BEAST477]

Go to the Help section and there is a thread that will walk you through it.
It took me a few tries and some help from a friend to post my avatar.

[JEFF69Z28]

PAY SOMEONE THAT KNOWS HOW TO DO IT FOR SURE.

[miked24]

I have a guy that is helping me. He has been a dirt tracker for years and has sum good experience. I'm just finding sum better ideas that may help me and possibly him too that maybe he doesnt know. He actually built the 383 that I twisted the crank on. But it was a stout motor, I think it had a forge issue with the crank. In the break it had sum impurities in the metal it looked like but anyway thanks for the experience you guys are giving.

[miked24]

Here is a couple pics (if I did the posting right) of the car I'm putting it in.....................................http://img600.imageshack.us/i/016aen.jpg/

[miked24]

obviously that didnt work

[miked24]

http://img52.imageshack.us/img52/7674/017xnu.jpg (http://img52.imageshack.us/i/017xnu.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)
http://img600.imageshack.us/img600/8894/016aen.jpg (http://img600.imageshack.us/i/016aen.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

[miked24]

finally figured it out yay me

[dragonmaster093]

nice 3rd gen

[miked24]

Thanks. Ive had it close to a year now bout it off a good friend that helping me with the big block. I got my cam in today and gonna move on and buy push rods and roller tip rockers this week. I cant wait til I can post a pic of me smokin the dam tires off of it......

[miked24]

Hey guys was wondering on my rocker arms I was thinking about going with the Summit brand alumninum roller tip. Have any of you ever used them and are they a quality built part? If not what do ya'll recommend?

[markdunlap]

Whren I try to choose an engine or other high performance auto part, I look for a company that specializes in that type of part. If it is valvetrain related I stay with companies that are making camshafts or who only make that particular part as a major part of their business.

Private label parts with names attached to them like JEGS or SUMMIT or BIG END are out there to find the people who put price ahead of quality.

If you only want to pay in the $100 range for rocker arms you will probably get Chinese origin parts.

Good rocker arms are $250-$350 and you can expect USA origin and better quality.

COMP CAMS, HARLAND SHARP, LUNATI, CRANE, CROWER are quality names to look for.

[mopar1968]

I agree Mark spend that little extra money and get a good set :!: :!:



Mark

[miked24]

Point taken.... I bought a Lunati cam so I guess I can buy a name brand set of rockers and push rods.............THANKS GUYS

[miked24]

What does 1.7 or 1.75 ratio mean on rockers. And for this build which would I need??

[dragonmaster093]

i have personally used pro form roller tip rockers an loved them and my brother uses them in his dirt cars with no issues

[zipper06]

What does 1.7 or 1.75 ratio mean on rockers. And for this build which would I need??

Just as it says. the B/BlK normally uses 1.7 Rockers which is 1.7 times the actual lift of the cam, the 1.75's gives a little more lift to the valve. Multify the actual lift of the cam by 1.7 gives the actual valve lift, same as the 1.75 will show a little more actual valve lift.

Zip.

[miked24]

OK I see thank you

[miked24]

Hey guys just got word back from the machine shop I was gonna need a new crank. That being said have amy of you ever ran a Lunati sledgehammer crank and if so what's your opinion? Or what other crank do you guys recommend for my application??