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Author Topic:   Which to use?
trynmods
Dirt Full Roller

Total posts: 53
posted August 04, 2004 04:53 PM  
On a 1/4 mile track with just alittle banking what would be best? A 305 engine with 416 heads with 350 turbo and 3.73 gears or a 350 engine with 882 heads with powerglide and 3.73 gears? The rearends are 10 bolts. Need advice a.s.a.p. Thanks for any info P.S. This is all I have to work with.

JRB13
Dirt Forum Racer

Total posts: 80
posted August 04, 2004 05:02 PM  
WHAT ROLL CENTER TIRES ARE YOU USING

trynmods
Dirt Full Roller

Total posts: 53
posted August 04, 2004 05:10 PM  
Both rears are about 86in. 2257015

juni
Dirt Maniac

Total posts: 184
posted August 04, 2004 07:01 PM  
glide and 373 should be around a 690 with 1.83 glide And around 653 with the 175 glide . Thats low gear . WE run any where from 683 to 700 at our 1/4 mile track. good luck.

marshalr
Dirt Maniac

Total posts: 148
posted August 05, 2004 07:35 AM  
Put the 416 heads on the 350. You can't beat cubic inches, those heads will get your compression ratio pumped up.The tighter you squeeze it the harder it pops.

Flanndad
Dirt Freak

Total posts: 255
posted August 05, 2004 08:16 AM  
Alot of people have tried and succeeded with the two options.
The 882's are prone to cracking, but again alot of people have success with them.
I wouldn't use the 416's on the 350 engine, because a 350 block engine likes to be high in the rpm range to be happy, and the higher you wind them the more air flow you need, so a pair of 305 heads on the 350 sbc are not your best option.
The 416's on a 400 block engine would be better because these are torque engines and the airflow isn't as great.
A set of 441's are easy to find, and with a little work would be a better choice for the 350 engine, but if you have the 882' already run them, they are good, just don't let them get hot...

Raz_900
Dirt Forum Champ
Total posts: 635
posted August 05, 2004 12:28 PM  
I'd go with the 350 and the 'glide. You gain a couple extra HP just from the 'glide. A TH350 is a little heavier to spin. Also, take the 882's and have them decked .025" (Would make them about 71cc and .5 CR boost over stock) or, if you can afford it, angle mill them .075"-.100" to make them around 66-68cc and about 1 CR point boost.

That's just basic guesses. Carb, Intake, Cam, Exhaust and target RPM range have a large part in head selection as well.

trynmods
Dirt Full Roller

Total posts: 53
posted August 05, 2004 08:07 PM  
Our rules say 350 heads for 350 engine same for the 305, Thanks for all replies, are there anymore replies knowing this rule?

I have the 305 in the car now is this a bad choice?

    

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