jdonly1

Can you make a 427 stoker engine out of a 350 chev block???any help would be great

BossHoggett

if your willing to weld the mains of a 350 and turn them down to the journal size your looking for.
Clearance the Block without going into the water jackets......and stuff about you can...or buy a dedicated racing block if you dont want to risk that.
Then find a suitable rod. or employ a machine shop to make you a set of custom rods to suit the piston you selected.

If thats to hard buy a 400 engine block and have the pieces there off the shelf to do it.
or as youll need a 4.25 inch stroke crank and if your going to so much drama to get the extra cubes the 400 block will net you 454.
from someone like World Products or any number of engine places.

gas 84k

A good mate of mine is going to try a 400 or 427 with set of sb2.2's on petrol and aiming at 800 at the fly naturaly aspirated cam selection is going to be the critical factor as this is going to be a street engine.He finished a 400 with sb2's before cristmas that made 820 but for some reason his customer insisted on a tunnel ram which the sb2's arn't designed for and used the same cam as was in the nascar that the top end came off so there was definately more in it.

mrprem

No you can't build a 427 stroker from a 350 block. The only production block you can use is a 400 block. They have a 4.125 inch bore standard and to get 427 cubes you need a 4.00 inch crank. That is realistically the longest stroke you can use in a production block. Anymore and you need to go aftermarket block like a Dart little M. If using a standard block, ideally you would start with a 2-bolt and convert it to splayed 4-bolt main caps, fill up to bottom of welsh plugs with block hardener and before you did any of that you would want to have it sonic checked to make sure it has enough bore thickness to make it worthwhile. By the time you spend all that money, you might as well just go and buy a brand new Dart block. Better in all aspects..

jdonly1

Thanks guys,thats what i though.Mmm i might be after a 400 chev block soon

BossHoggett

if you own a HQ why would you stroke it ??? as with a Disk rear end you can have legally a 454 ???? why stuff about trying to make power with a small block when you can have power and and more if you need it with a big block.............. this i never could fathom.
I'm assuming you just like to spend money ???

jdonly1

for 1 I have a 350 block and was going to go 383,then my mate who builds a few motors says 427 is the way to go.Where not looking at 7 or 800hp,just 5 or 600hp as its mainly going to be a street car

BossHoggett

mmmmmmm yeaaaaa righhhhhhht.

so why don't you ask your mate then and not us lowly people? if he does "build a few motors"
It would be him then who would know, wouldn't you think.
Your average Engine builder doesn't knock up 427s and 454s (out of small blocks) often.......
These are a select bunch of blokes. and generally very well known in the industry. with jobs in Top Fuel teams, V8 supercars, and other pinnacle motorsport. and some then go on to the states as the moneys better. so ?????

jdonly1

I askes you guys because he was not sure,he builds motors but not top fuel motors.He owns a wild bunch torana with a blown keith black which he built but thats the biggest hes done.He normally builds motors for speedway cars and some tuff street cars.
He is currently do a VL turbo that should do over 900hp.He is not a tuner of turboed or late model fuel injected cars but is bloody good at building the thing,they last and run hard.
The main reason I asked you smart fellas is because I was pretty sure I would get an accurate answer and get it fast
Thanks JD

allports

One cents worth here, If an engine builder is any good at his game, he instinctively knows how to tune. If not he's an engine assembler, a big difference in the two. A good engine builder will be able to tell you how much HP an engine will make before it even starts, (within a few) A good engine builder will be able to tell you the actual calculated mean average gas velocity at any given RPM, how much BMEP it will have, what VE it will have etc etc etc.
A good engine builder will know his formulas and when to set the blow down time.

A 500-600 hp small block is a no brainer, you dont need to spend $30000 making it a 427 because one thing effects another in the chain links. So its not just a matter of bolting in a bigger crank, Clearance to the cam is a drama as is the sump rails etc etc.
If you cant get 600hp from a 355 you should give up.
Will your street car handle 600HP? Will you be able to hook it up?
Hp is a vastly over rated thing, actually the quoted numbers are whats over rated.

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jdonly1

600hp is easy,and possibly a lot more.The thing here it is going to be mainly used as a street car,I dont want to be driving down the street and have it vibrating parts off the car.I also dont want to be reving this thing past 7,000rpmand it will be running on pump gas.500 to 600 reliable hp with good tourque and some thing i dont have to rev up to much will be fine in the old coupe.
If i want more there is always gas
As for the tuning,he is fine doing all the older holden and fords.He will build my motor and tune it.
This thing will cost me around the 6 to $7000 dollar mark and a few slabs.Not to shabby for that hp me thinks
Also if I was desperate for a 427 small block I would buy a 400 small block and go from there.I just need to know if it was possible to be able to do it to a 350 block