Visit The Dirt Forum for More Information

Author Topic:   327 vs. 350
race33
Dirt Full Roller

Total posts: 44
posted May 15, 2004 08:47 PM  
I am trying to decide whether to build a 327 or 350. We have a flat top piston rule as well as stock heads and 460 lift hydraulic cam. What do you guys think? Also, which heads would you use?

Flatlander
Dirt Freak

Total posts: 355
posted May 15, 2004 09:19 PM  
as a rule theres no sub for c.i. but on a dryslick 1/4 or 3/8 you could do well with a 327 headwise it's up to what the rules allow IMO


Racefan20k
Dirt Roller

Total posts: 18
posted May 15, 2004 09:26 PM  
I am a 350 guy, everyone runs them everyone has extra parts and they are easy to find but thats just me

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 16, 2004 08:06 AM  
it depends on your weight rule, if you get a weight break for the smaller motor go for the 327, we can run 200lbs lighter up here with a 331 over the 355s. 24 extra cui isin't worth 200lbs for me, expspecially when the power output is prob about the same. we turn aprox 7200 rpms with a small journal 327 30 over with 11.5 to 1 domes, 461 heads, and a hydralic cam. i have no prob keeping up with the 355 and a few 400 that run with us. just my 2 cents

race33
Dirt Full Roller

Total posts: 44
posted May 16, 2004 03:56 PM  
We don't have a weight rule other than it cannot be bigger than 360. I do have a question though. I want to make sure I actually do have a 327. The numbers on the motor are 3970010. When I checked at Mortec.com, I see that they made a 302, 327, and a 350 with that casting number. How do I know for sure what motor I have?

nice_guy_wi
Dirt Maniac

Total posts: 120
posted May 16, 2004 05:42 PM  
Easiest way to tell for sure is to pull one of the heads off and measure the stroke. 302 is 3".....327 is 3.25"......and 350 is 3.48" And racefan20k all those extra 350 parts will fit right on the 327.

racerman707
Dirt Freak

Total posts: 374
posted May 17, 2004 09:35 AM  
There are 2 styles 327s. Big and small journal. The small journals have smaller rods and can pull(stretch) into if not careful.

fs33
Dirt Newbie

Total posts: 1
posted May 18, 2004 10:11 AM  
Do the 327's weigh less than the 350's?

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 18, 2004 04:59 PM  
the rods are the same 5.7 the crank has a shorter stroke and the wrist pins are a 1/4 inch lower on the piston to make up for the shorter stroke they turn up real fast the bore is the same also

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 18, 2004 09:13 PM  
ya what he said lol smell that brain fart

Back to the Archives