neelsnoles
Registered Member
I want to rebuild a used 350 motor i just bought....i'm going to use it for some drag racing at the track But want to keep it street legal...what do i need to do, i need everything ..carb. 
CK5
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350 small block (upgrade)
- Thread starter neelsnoles
- Start date
How much do you want to spend? How much power do you want? More power=more money. Whats it going in? Stick or auto?
You can do a cheap rebuild of just rings, bearings and gaskets. But that wouldn't be much of an upgrade. To do it right you should compleatly disassemble it and take the block, crank and heads to the machine shop to have them degreased, magnafluxed and checked for truness. The block will probably need to be bored and maybe decked. The crank may need to be turned ($70 around here). If the crank is to far beaten down to be turned you could upgrade to a 383. The cost is about the same.
If the heads need new valves, or you're thinking of putting larger ones in. It may be cheaper in the long run to buy an aftermarket set. Even the worst set of aftermaket heads will flow better than a set of factory ones.
The cam you choose should match your intake choice. Duel plane is better for low/mid range. Single is best for upper rpm's. A high lift/long duration cam would be best paired with a single plane and a higher stall converter if you plan on using an auto. Might even need to regear the axles to keep the motor in the happy range.
If you're planning on big power (600hp or more) a factory block will be at it's limits. From what I've heard/read for a good foundation use a four bolt or better yet a 2 bolt converted to 4.
I've built 5 350's all with differn't power levels and for differn't vehicles. The cheapest rebuild (just under $600) didn't last that long. The most expensive one (over $4500) is still going strong. And that sees mostly drag strip time in my Camaro.
You can do a cheap rebuild of just rings, bearings and gaskets. But that wouldn't be much of an upgrade. To do it right you should compleatly disassemble it and take the block, crank and heads to the machine shop to have them degreased, magnafluxed and checked for truness. The block will probably need to be bored and maybe decked. The crank may need to be turned ($70 around here). If the crank is to far beaten down to be turned you could upgrade to a 383. The cost is about the same.
If the heads need new valves, or you're thinking of putting larger ones in. It may be cheaper in the long run to buy an aftermarket set. Even the worst set of aftermaket heads will flow better than a set of factory ones.
The cam you choose should match your intake choice. Duel plane is better for low/mid range. Single is best for upper rpm's. A high lift/long duration cam would be best paired with a single plane and a higher stall converter if you plan on using an auto. Might even need to regear the axles to keep the motor in the happy range.
If you're planning on big power (600hp or more) a factory block will be at it's limits. From what I've heard/read for a good foundation use a four bolt or better yet a 2 bolt converted to 4.
I've built 5 350's all with differn't power levels and for differn't vehicles. The cheapest rebuild (just under $600) didn't last that long. The most expensive one (over $4500) is still going strong. And that sees mostly drag strip time in my Camaro.
neelsnoles
Registered Member
It's going in an automatic....i'm going to rebuild slowly so it will be right...I wan't to spend around 3000.00 will this get me a good rebuilt motor for the drag or street.... will this be ok with a holley 750 dp http://shop.enginekits.com/osb/itemdetails.cfm?ID=81
broncoman6524
1/2 ton status
A 750 might be too much for that kit. I have a 725 on my 383, and I had to de-jet it... Ran horribly pig righ.
neelsnoles
Registered Member
so maybe a 600 or 650 ?
neelsnoles
Registered Member
what would you use?
troutbum_mt
1/2 ton status
look forward to watching this thread because I am interested in hearing myself
I've used Holleys, Edelbrocks and Quadrajets. If it's only going to be raced...then go for a Holley. But get prepared to tune it. If you plan on driving it on the street, I'd go for a rebuilt Quadrajet. They're easy to work with and they can make great power once you get them tuned in. Plus you can pretty much set it and forget it.
A 600 or 650 Holley or Edelbrock would be a good choice. Q-jets flow more air than that, but they only give the motor what it needs.
broncoman6524
1/2 ton status
I would steer away from edelbrocks, they are great a first...but over time they "wear out" I put a 600 on my 350 adn a year later after hardly adjusting it stopped working correctly.
Depending on how you build the motor will denote which size you need.
Depending on how you build the motor will denote which size you need.
neelsnoles
Registered Member
so the 383 stroker kit is the best route to go when rebuilding an engine?
If you need to have the crank replaced, then yes. The cost is the same. Jegs has Eagle cast cranks for $189.99.
Lots of info needed. What year and make of car? Is the car stripped of interior parts or is it a full car? What rear axle and gearing, tire size? You said auto do you have a stall convertor or plan to use one? I can tell you right now that power is made in the cam and head selection primarily and for 3000.00 you're not going to get much.
neelsnoles
Registered Member
And if the crank don't need to be replaced. what is the best rebuild kit to use.....
