Ad Radar
Popular Hot Rodding
Click here to find out more!

400 or 350 chevy engine?

  
Popular Hot Rodding
1 |  2 |  Next   | Last 
Item Posts    Sort Order

400 or 350 chevy engine?

 
1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/26/08
02:15 PM

I own a 1971 chevy nova.  -350trans with shift kit, What would be the better engine for street use. A 400 or a 350?  My buddy has a shop and will do the work with no labor charge, I plan on putting about $1300-1500 in either engine, i already own the 400 (paid $75 for a complete stock 400 engine Smile Which could i get more "pep in my step"?  I know the 400 will get more torque but  will i get about the same hp? Is there any any negatives about the 400 besides the crank and possible overheating?  Any suggestions would be appreciated - thanks- Caleb  

Pontiac4 Pontiac4
User | Posts: 105 | Joined: 01/08
Posted: 02/26/08
05:29 PM

The rebuild kit parts will be cheaper for a chevy 350 then a 400 and I prefer a 350 over a 400 chevy.  
Professonal hi-performance engine builder

horsepower sells engines and torque wins races

1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/26/08
05:37 PM

read next post.  

1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/26/08
05:38 PM

I probably wont be rebuilding this with a kit. Most everything will be used except the int. manifold, headers. Like I said my buddy has a garage and enywhere there is room to sit an aengine block you can bet theres one sitting there. Hes got parts lying around, heads, new intakes, carbs.   By the way What would you suggest i run on this, ill most likely have a dual-plane intake (more low end torque?) would it benefit me to run 2 carbs for better fuel distribution?  And what heads should i run, 2.02 or stock 1.94?  

Pontiac4 Pontiac4
User | Posts: 105 | Joined: 01/08
Posted: 02/26/08
05:43 PM

Prostreet I listed a good combo of parts for your 400 chevy on your other post and I would stick with a single 4bbl.  
Professonal hi-performance engine builder

horsepower sells engines and torque wins races

1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/26/08
06:36 PM

How many lb/ft torque do you think ill produce judging my other posts? I think id rather have torque for the street, wouldnt you?---Caleb  

prostock1 prostock1
New User | Posts: 13 | Joined: 01/08
Posted: 02/27/08
08:18 AM

the price diff.for rebuilding either one will be pennies.use the 400, 1.94 heads,dual plane intake,headers,750 carb.and street type cam.tons of power.  

Pontiac4 Pontiac4
User | Posts: 105 | Joined: 01/08
Posted: 02/27/08
10:04 AM

OK with a 9.5:1cr, the .470 lift cam,750 CFM carb.headers,2.02/1.60 valves you should make over 400 TQ. out of the 400s.b. even more with and a good porting job and a 3 to 5 angle valve job.Also what is the casting number of the heads you are going to use.  
Professonal hi-performance engine builder

horsepower sells engines and torque wins races

1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/27/08
01:53 PM

just some other stupid questions- Roughly what would be my 0-60 time,  What would it run in the 8th mile, and what would it run in the quarter mile? It is a 1971 nova so it probably weighs around 3500lbs. If you need any other info to answer this question check out my other post. some schanges would be a 3.55 gear ratio.  

sbc_man_1972 sbc_man_1972
New User | Posts: 10 | Joined: 02/08
Posted: 02/27/08
05:22 PM

Hey man, build the 400. It will run circles around a 350. There are no cooling problems with 400s. Just lots of power. Use a cam with at least a 106 degree lobe separation. Dont use 110 degrees! Crank problems? There arent any! I have a 72 Nova and it weighs 3100 even.  

1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/27/08
05:39 PM

hey thanks man, i was thinking which one to use but i said every everybody and his brother has a 350 in their car, but not many people have a 400. But what really made me want to use the 400 was when i bought a complete stock engine for 75 bucks, Is that a good deal or what?!!  

sbc_man_1972 sbc_man_1972
New User | Posts: 10 | Joined: 02/08
Posted: 02/28/08
09:27 AM

Really good deal. I have a street 72 Nova at 3100 lbs, with a 406 small block, Turbo 350 trans, and a 4.10 gear that runs a 1.44 60 foot, 6.70 et, 101 mph in the eigth mile. Its nothing special, it just gives you a few numbers for comparisons. If you build a 355, expect to slow down about 3-5 tenths or more, no joke. I promise you if you build the 400 with the correct componenents, it will embarrass those 350 owners! And you can do it with not that much cash outlay.  

Burtreyn0lds Burtreyn0lds
User | Posts: 89 | Joined: 09/06
Posted: 02/29/08
01:06 PM

Wow 75 bucks, can't go wrong with that.  

1971prostreetnova44 1971prostreetnova44
New User | Posts: 12 | Joined: 02/08
Posted: 02/29/08
06:36 PM

I got the 400 this morning, but i have a problem. I got the intake off, got 17 bolts out of each head, but neither head will come off. We hammered on the heads with a chisel but they wont budge. The bolts when i took them out had something like silicon on them. Would this hold the heads on like glue.  thanks--caleb  

sbc_man_1972 sbc_man_1972
New User | Posts: 10 | Joined: 02/08
Posted: 03/01/08
09:32 AM

If you have ALL of the head bolts out, get the longest crow bar or bar you can find, stick it into an intake port and get with it. If the head gaskets have silicon on them, its gonna be extremely difficult to get them off!  

1 |  2 |  Next   | Last