'63 Chevy step side

[63chevystepside]

Is it a 350 or has it been bored or need bored?

If you take a portion of the $2500 that would need to go towards the BBC you could build a nice little 383 stroker. A set of vortec heads and a mild/moderate cam.

I had a nice mild 383 in my Nova to start with. It would run on 87 octane all day long, a comp 292 cam (hydraullic flat tappet) and it would run high elevens in my Nova pass after pass with 3.23 gears.

Saw your new engine "sweet" congrats. ok your going to make me spill my guts on this one so here it goes-first off im not doing anything close to what you got either way with the 350 or 454 my wife would. First the 454 its sitting on the stand now with already been bored 30 over an having new cam and freeze plugs waiting for the next step.9:2 to 1 pistons, all balanced and reworked with crank turned just good normal stuff you know.Have the heads cleaned up about 20thousanth to give alittle more compression the heads are 1974 large oval NOT peanuts 781. Just going with stock springs but new ones they are suppose to be able to handle up to a 550lift-cam is 112 lobe-268 duration-525lift and good up to 6500 which i won't see past 5800 but thought it help with breathing better...then just the normal stuff-alu. intake-750 holly-headers-electric fan and fuel pump-hei with a weight set....with a beefed up 400 tranny with a 373 limited slip rearend---not anything drastic but impressive all around. The 350 is a 1974 350 also but supposely had been rebuilt by oreillys-well its getting 180psi at the cyclinders and it runs good now but if i was to switch with said above on the 454 drive train the 350 would have just a cam put in(292duration-110lobe-501 lift) and new z28 springs and stronger pushrods with the double roll chain-alu. intake-headers...everything else mentioned on the 454. Im not wanting to tear apart the 350 to see what it has-but im guessing its been bored from oreillys and hot rod said it might would have diffrent cc heads to raise it up also-i don't know but if i got 180psi that puts me around 10:2 to 1 thats pretty much it. Iv been thinking of going with the 350 instead of the 454 because thier hp is really close already in stock form an when i entertain the idea of just using the hydralic lifters the 350 sounds better choice. And the 454 is 2500 away an the 350 is about 500 or less---thanks for the gut spill.lol---i can then put the 454 in the back ground from wives view and turn it into a 427. And that 350 is about a 290 horse just by the compression raise up to 10:2 to 1 an before you add in all the mods. I can get hydralic lifters good up 6500rpm range an thats what i'll do if i go with the 350 and it be a 6500rpm engine.

 

[63chevystepside]

Hot rod you had said...You can compesate with a big cam with valve overlap to bring the dynmaic compression ratio down and run on 87-91 octane just fine... when we were talking about the 305/350 combo. Can a cam by its valve overlap raise the compression up? Was wondering because of the 350 in the pink truck has a cam and thought that might be why the compression was higher

 

[63chevystepside]

I found a site that was saying it does-ok the cam in the pink truck is a 480 lift-288 durration-110 lobe and rpm range 2200-6200. I guess there is alot of diffrent things that effect a engine to cause it to....and not just 10 to 1 pistons...i have a sound that i hear from it that sounds like a rattling-like the timing chain is loose-but i know its not but i cant pinpoint where at in the engine its coming from-so im kinda thinking i got to low of octane for its compression. I think i put 87 in it last-

 

[63chevystepside]

66 what kind of compression are you running? Do you use higher octane stuff or a add.?

 

[66nova]

I'm running around 11.5:1 but that is with aluminum heads. With iron heads I wouldn't go over 10.5 if you want to run pump gas. I run 93 octane on the street but 110 at the track.

As far as your motor goes, I say go with the 350 and build the 454 up. Why are you to destroke it to a 427? If you're spending the money to build it I would build a 468 or 496. Watch Racing Junk.com and eBay for a kit.

 

[63chevystepside]

I'm running around 11.5:1 but that is with aluminum heads. With iron heads I wouldn't go over 10.5 if you want to run pump gas. I run 93 octane on the street but 110 at the track.

As far as your motor goes, I say go with the 350 and build the 454 up. Why are you to destroke it to a 427? If you're spending the money to build it I would build a 468 or 496. Watch Racing Junk.com and eBay for a kit.

I dont think i can get 93 around here max is 91 unless you get track gas.im going to put 91 in an see what it does my timing is 16 intial.---The reason for destroking the 454 into a 427 is to have a higher red line. I know we already touched on the stroke thing but yea my manchinest says he builds 8000rpm 454 all the time who is a good manchinest by all respects-but i have a bud who is one of those old timers who is a engineer an he says-yes a 454 can be made to go 8000rpm BUT because of the stroke its limit is 5800 an anything past that is doing the bottom half harm. And the 427 would be a bored 30 over i have to check to see what the destroke would allow the red line to go up to...im a safe within the guide lines builder.Sure i can add more cubic inches make it a 468 destroked with a 427 to spin out faster an have the cubis inches-is just a thought-but yea think im just going with the 350 in the pink trk for now-basicly its all ready just got to yank an install. But taking the 454 up to a 496 might have its advanges so im going to consider it-watch out for jerky math lol---have to read a few pages back to get that.

 

[63chevystepside]

Has anyone tried with a hydralic lifter---by using a high pressure oil pump to pump up the lifter then backing the rocker off an allowing the lifter to pump up and once its pumped up set the rocker just a tad over from where it clatters? Almost like making it a solid lifter? And yea using the right springs...

 

[66nova]

Can't say that I have, but it sounds like it would be hard on lifters. Then again, I haven't bought a hydraulic cam in about 12 to 15 years.

 

[63chevystepside]

Can't say that I have, but it sounds like it would be hard on lifters. Then again, I haven't bought a hydraulic cam in about 12 to 15 years.

I came across a site where a guy was saying stock carers do this-if i understand him correctly in that its what stock carers are known to do. He was saying that it keeps the lifter right at before it floats and pumped up---kinda like you would have all your lift... all the time and your lifter does this in the higher rpms anyways so instead of just in the higher rpms its through the whole power band. My chilton says rockers are suppose to be one full turn past clittering but iv heard guys doing a 1/4 turn instead---it makes sense it stops the lifter from floating and also from collasping. I was thinking of trying mine this way...any input would be welcomed.-thanks in adv. O i think they call it shimming?

 

[63chevystepside]

Got it ready...