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-   -   350 vs 350 (http://www.hotrodders.com/forum/350-vs-350-a-3270.html)

78 monte 08-22-2002 11:13 PM

350 vs 350
 
After months of scrounging and scrapeing I had to admit to my self that my new motor won't be done till winter.Now in it's most budget form.I'd like a comparison to my old motor.
The new motor is very basic,frugal,cheap if you will.It's a 350.
350 short block rebuilt to stock
(std bore)
dished pistons
Cam 218/224@050 .460/.480 110sep
Heads #882 1.94s milled .010 3angle valve job
.018 head gaskets

Old motor is 350.
Stock short block
dished pistons
Cam 214/224@050 .443/.465 112sep
Heads 305 w/ 1.84/1.50 3 angle

Both motors gotts da same stuffs.
Edelbrock performer intake
600cfm holley
1 5/8" headers
2 1/4" duels
Now how do you think the new motor will compair to the old one in terms of HP and torque.I'll be loseing compression for valve and slightly bigger cam.I figure the slightly higher lift and tighter lobe sep will make a hair more torque.

Steve karch 08-23-2002 04:25 AM

Your new motor should be strong. The biggest restriction on your old motor was the heads. 305 heads may give more compression but just don't flow. The only change I'd make is to use a Performer RPM intake. I have the same basic setup up as your old motor but use stock 194/150 valve heads, 76 cc chambers and a Weiand Stealth. Its a strong runner and is very driveable and with the bigger cam in your new motor, and better heads you will have a strong runner. Torque may be a little weaker at lower rpm's but overall torque and hp will be higher

bullheimer 08-23-2002 11:54 AM

i agree with steve. i think you will lose some low end torque but not too much and will gain top end. the cam grinds are almost identical so i don't think you'll see much difference other than you'll have a brand new engine that should be more fun to drive.

78 monte 08-23-2002 06:23 PM

Kinda what I figured more overall torque HP but less low rpm torque.I picked that cam cause the tighter lobe sep and higher lift would make a little more torque.But I didn,t want to much duration cause of the low compression.Just wanted to run it by a few of you.
Now how about a 500hp NOS fogger w/ a 8-71 blower????A wee bit to much???

Studebaker 08-23-2002 10:10 PM

Sorry to tell you this, but Casting #882 (last three digits) cylinder heads are smog heads and are very prone to cracking. Also if you look at the exhaust crossover port you will find that they actually split and go to both center cylinder exhaust ports. This design makes the heads prone to run hot. This was good for increased engine tempatures for emissions and reduced hydrocarbons in the exhaust. However, this casting design is probably not very good for performance applications.

wildcard 08-24-2002 11:46 AM

I agree with studebaker.The 882 heads are prone to crack & I never got any power out them low or top end.I also never had any problems with the 305 heads flow.Maybe you guys are puting more into your engines than I have.I always port my heads & have the valves cut out for 2.02.I also blend the bowls.That maybe the reason I dont have flow problems.


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