Thread: 350 build up

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i have a stock crank and rods but the block is bored over .30 and i have flat top pistons. If i put on a set of heads with 2.08 valves 49cc comb. chambers and 230cc intake runners matched up with a torker 2 intake with matching cam would this work ok?

Please fill us in on the engine. 350? Already the heads sound way too big and "matching" cam is????? Stock crank? If it's stock oem cast, there's going to be problems. Not to make you feel left out of the loop, there is too much info not being supplied. Please help the thread here by giving us more to go on and what it is you wish to accomplish. Everybody here is more than willing to help and all of them wish to give you the right advice to give you the best results.

Originally Posted by #1firebird

i have a stock crank and rods but the block is bored over .30 and i have flat top pistons. If i put on a set of heads with 2.08 valves 49cc comb. chambers and 230cc intake runners matched up with a torker 2 intake with matching cam would this work ok?

One of the magazines did a article on a budget build 350( I think it was chevy hi performance). They put those same Dart heads on a bone stock GM goodwrench 350 engine, made 11-1 compression with the dished pistons, and put a huge cam in it and made 530 horsepower. BUT.... that was a horrible build because the second anybody actually put it in a car with some slicks the crank and rods would be out on the ground. Plus the heads were way too big for a 350. 230's should be used on a 406ci or larger. The engine would be a dyno queen only, so I would say NO those heads won't work. That magazine should have never published that article.

Originally Posted by #1firebird

i have a stock crank and rods but the block is bored over .30 and i have flat top pistons. If i put on a set of heads with 2.08 valves 49cc comb. chambers and 230cc intake runners matched up with a torker 2 intake with matching cam would this work ok?

Heads are way to big un-less you are going to spin it to 9,000 rpm's.

How much HP and how many RPMS is a stock bottom end good for?? Arp rod bolts inserted.

Originally Posted by jimmyjeep

How much HP and how many RPMS is a stock bottom end good for?? Arp rod bolts inserted.

That depends on if it is a cast or steel crank and how new everthing is.
A fully preped 5.7 rod with ARP bolts will handle 6,000 rpm's.
But for how long? That is the question.

i just wanted to get as much horsepower as i can but still be able to run pump gas. And still have the sickest 350 in my town

if those heads are to big then how are you supposed to build a 900 hp 350 without any power adders or high compression, not saying thats what im trying to do

Originally Posted by erik erikson

Heads are way to big un-less you are going to spin it to 9,000 rpm's.

well yeah i was planning on building a screamer

900 hp is always achievable. Then again, having Angelina Jolie greeting you at the door when you come home is too (somebody know how that's done?) you don't need to go that high in HP. Stick with what works. A set of 180 or 200 cfm heads with right combo cam will spin 9 grand. Question is, How will the rest of the engine take it? Will your accessories take it on a street motor? And are you willing to keep the bucket of cash at the ready to feed it on a constant basis if you are going to drive it daily or even a few times a week? Start from basics. Good bottom end good geometry (ALWAYS good geometry) ANd use common sense and you'd be surprised how much you can get out of it. Thanks.

yeah well i just want to build a motor that will stand up to a drive a couple of times a week but that will still give me a good scare every now and then. wanted to run pump gas and red line at like 7 to 8 grand and have absolutly no problem screeching the tires when i shift.

why did you and eric say the heads are to big whats wrong with bigger intake runners and huge valves

Originally Posted by #1firebird

yeah well i just want to build a motor that will stand up to a drive a couple of times a week but that will still give me a good scare every now and then. wanted to run pump gas and red line at like 7 to 8 grand and have absolutly no problem screeching the tires when i shift.

why did you and eric say the heads are to big whats wrong with bigger intake runners and huge valves

An engine that is going to rev to 8,000 rpm isnt going to run on pump gas. You would need at least 13-1 compression and a monstrous solid roller camshaft. Your budget decides what the motor is going to be. A stock crank and rods is not going to cut it.

You can get by with your stock motor with a set of 180cc 64cc chamber dart heads, and a 280H comp magnum cam. You can use that torker2 intake with that combo. With the flat top pistons that you have and the 64cc chamber it should be around 9.5-10 to 1 compression, which would be a good on pump gas. You should make over 400 horsepower with that setup. But don't expect it to rev to 7 or 8 grand.

what about 58cc comb chambers instead of 64?

Elko and I understand "velocity". That where you're gonna kill the use of the engine when you really wanna improve the flow characteristics. Without bragging, I can make you motor turn up to and over 9 grand. Let's not forget the basics though. DO you really wanna turn 9 grand? Elko's got a better perspective on where he was going with his reply. You can do very very well at limiting this engine to a more respective rpm like 5500-6000 and when it's just right, you'll swear it's turning 9,000.

haha well sounds good. i just want a screamin ass motor that will bark the tires when i shift and light up the tires like none other