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Old 10-20-2008, 08:52 PM
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bogus machine shops?

i reacently had a 350 4 bolt main bored .040 balanced blueprinted and a step 1 RV cam. the heads were done at the same shop. It wont even power stall. Ive tried severaal carbs ignitions and was thinking about a new rear end might help it has a 2.56 rear end. let me know what you think is maby the problem.
Thanks

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Old 10-20-2008, 08:59 PM
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Post the following and we'll try to figure it out for you, although replacing the gears will be a big step forward.
Cylinder head casting no. and chamber cc's
Piston mfg, part no. and crown configuration
Piston deck height
Head gasket thickness
Cam mfg, part no.
Intake mfg, part no. or casting no.
Carb mfg, cfm, vacuum or double pumper
Headers or manifolds. Primary tube size if headers.
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Old 10-20-2008, 09:11 PM
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Quote:
Originally Posted by briced
i reacently had a 350 4 bolt main bored .040 balanced blueprinted and a step 1 RV cam. the heads were done at the same shop. It wont even power stall. Ive tried severaal carbs ignitions and was thinking about a new rear end might help it has a 2.56 rear end. let me know what you think is maby the problem.
Thanks
A rear end change into the 3's would get the torque into the right rpm range, that's why your flat!
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Old 10-20-2008, 09:46 PM
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What is a "step 1" Rv cam? Most Rv cams I have seen are not much better than a stock cam.

2.56 gears! There is your problem!
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Old 10-20-2008, 10:12 PM
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im not familiar with the term power stall, but i take it to mean a burnout.

in addition to the info that has been asked for, some other info to include is if you have a posi read end, what tires you have and their height & width, & the stall speed of the
converter.

i have a 2.42 gear with an open diff in my car and my problem is a lack of traction.
a nice burnout looks cool, but at the track if your spinning the tires, your wasting time.
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Old 10-21-2008, 06:26 AM
How fast is fast enough?
 
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TO break the tires loose with a stock setup (which is basically what you have) the easiest and cheapest way is to increase the stall, however increasing the gearing will have a far greater impact on your acceleration.

Step up to some 3.42's and a 2,000 stall- even the mildest 350 will give you a good amount of pull with that combo... unless its in a 1 ton truck pulling a loaded horse trailer or something.
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Old 10-21-2008, 10:57 AM
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engine

Did the machine shop build you what you paid for??? I mean did you ask (or only wanted to spend X amount of money) for a stock cam, heads,compression etc???

If so then the title of your thread needs changed...


What type of car is this in??

Does it still have the stock exhaust manifolds and single exhaust??? How about intake and carb???

If there is a brake problem and only the back brakes on the car are working correct and your trying to power brake it, a 350 hp engine will probably not spin the tries with 2ish rear gear...

Keith
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Old 10-21-2008, 11:04 AM
How fast is fast enough?
 
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I think a 350 horse engine can easily spin the tires with that gear- I don't think he has an honest 350 horse engine though. It looks like he has a stock rebuild with an RV cam- which puts him more at 250 horse. That with a 2.42 rear gear probably won't spin the tires much.

There's nothing wrong with a stock rebuild- it still gets you down the road, just don't expect it to be more than a stock engine.
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Old 10-21-2008, 12:12 PM
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I don't think it's 350 hp either...

More like 200/250hp. It was just a statement that if only the back brakes are working, you have the tires locked that your trying to spin.


Keith
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Old 10-21-2008, 06:15 PM
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I didn't read anywhere where he said 350hp. It's a 350ci 4 bolt main.
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Old 10-22-2008, 06:12 AM
How fast is fast enough?
 
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k-star was talking about 350hp. And most people assume a built chevy 350 is going to ahve ATLEAST 350 hp- but in this case its only slightly better than a stock 210.
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Old 10-23-2008, 06:46 PM
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Even a stock motor can peel out if its in a good state of tune.

Find out your compression ratio and camshaft specs, then adjust your timing curve to match it. If your cam is much over stock with low compression then you need a lot of timing advance, maybe 17 at idle and 36-40 total.
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