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So I've always been interested in pushing engines n/a. I like turbos and super chargers just as much as the next guy but it's just cool to me to see a high power engine without any help. So was wondering if it was possible to take one of those dart blocks with that taller deck height and 4.500 bore spacing and bore it out to be 454 or bigger and get somewhere close to 1000hp out of it and if it is possible could it be done with a compression ratio that will work on pump gas. Tho I get it might not make 1000hp on pump gas. I know no one can give a very good answer without just trying it but I was thinking about doing just that a couple of years down the road and was wondering if I am crazy or not
454 smalls blocks have been built. A full out race 23 degree head gen 1 small block is probably not going to make 1000 HP NA. One built to run on pump gas and fit under a Corvette hood is not going to be anywhere close.
You can certainly build a 454" SB pump gas engine, its been done for decades. Now you can even build 480-49x" small block engines.....But even they won't make anywhere near 1000hp on pump gas. You'd likely be hard pressed to make more then 775hp on pump gas, on even the most killer small block....And you'll spend SERIOUS coin for that.
Check out Uratchko, and get your checkbook ready...
454 smalls blocks have been built. A full out race 23 degree head gen 1 small block is probably not going to make 1000 HP NA. One built to run on pump gas and fit under a Corvette hood is not going to be anywhere close.
Mike
Agree with v2racing on this one. If it were easy, everyone would have one, me included. The race engines are making 50-70hp more than the street versions because of compression (there goes your pump gas option), and they have to spin around 8000 rpm to hit near 770 hp with 23° heads. My 440 sbc is slightly under 700 hp, and I left some horsepower on the table because even with the tall L88 hood the appropriate (better) intake won't fit under the hood. All things being equal, 454" would give only a small HP and TQ increase over 440". You can only put so much cam in a 11.0 comp. engine before you get diminishing returns, and engine builders like Shafiroff , etc., are pushing the limits now to achieve 700 hp. Even the tall deck sbc's of 468" struggle to get 800 hp........and you have to overcome some fitment issues in a C3.
Last edited by C3 Stroker; Nov 9, 2018 at 03:58 PM.
So high 600s to middle 700s sounds a little more do able?
600-650 is very do-able on pump gas and conventional heads for about $13-15k. 700hp takes a little more work...usually at the limits of pump gas, solid roller cam, tall intake etc... easy $15K+.
You start getting up in the 750-775hp range on pump gas, they are using different port/valve lay out heads, huge cams and basically a single carb, TALL intake... easily a $25k engine.
A 900+hp Uratchko pump gas 440” is over $40k. How fast do you wanna go and how much money do you have?
This car was being built alongside mine at Box Performance. It has a 454 SBC, tall deck. It fit OK but some "adjusting" had to be done to the headers and the frame. Sidepipes were installed. Street car, pump gas, engine similar to mine with these exceptions....454", and tunnel ram dual quads. It dynoed 720 hp. Hood?.......yeah, big hole cut in the middle, but overall nicely done.
Last edited by C3 Stroker; Nov 9, 2018 at 09:53 PM.
Ran across this 406 putting out 939 horses. It obviously is a race motor. Probably has mega compression. It has a sheet metal intake with dual Dominators on it. This engine is way beyond anything you could build for the street. It is only 406 cube, but larger cubes on an engine like this would only lower the rpm at where the peaks occur, it would make more torque but probably wouldn't gain any peak horsepower.
a peanut port big block has more port area than the largest gen 1 small block heads. you are limited by the size of your heads. ford Cleveland ARE big block heads.
You will never touch 1000hp with a small block anything naturally aspirated without a dedicated race head like the Bowtie splay or the dart Little Chief and then it defeats the purpose of building it as it is just a high priced custom unit.
I worked at World Products in Long Island 15 years ago and they have a 454. It made 600 horse with a too small cam and non ported Motown Heads. Now that actually wasn't a bad unit but you throw the block away when the bores wear out as it was at 4.250 bore....it even had a Fel Pro gasket specifically made for it.
700 horse on pump gas is easy with a 421......yes a 421.......3.875 stroke. 4.155 bore......23 degree Dart CNC 227 head.
I built a few of these and the reason why I went 3.875 stroke is to lower the ring stack another .060. This made it possible to shoot 250-300 of nitrous at it for 1000 horsepower.
If you have never drove a 700 horse car on the street....let just say that you better have some skill......a Vette is a killer platform for power, but 700 is no joke and can make a car do dances really quick. I don't want to hear about Hellcats having 707 and going straight because it is a modern platform with all kind of stability controls.
One of my 421's went in a box S-10 that ran low 9's on the street on a 9" slick with a Big Shot plate (300+). It ran on 93 octane and had a reserve 2 gallon reservoir under the hood with 114 Torco in it plumbed to the spray bar........brutal sneaky machine.
Anyway......if you really want to go fast......build a Big Block!!!! LOL.
454 sbc???
