scottsdale86
1/2 ton status
^^This is why i dislike the 400 SBC. I went through two in my chevelle before i finally gave up and just got a big block. Other than the added weight i was MUCH happier. Did everything the 400 would do and did it easier.
CK5
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400 sbc???? (All assembled)
- Thread starter Deuling
- Start date
^^This is why i dislike the 400 SBC. I went through two in my chevelle before i finally gave up and just got a big block. Other than the added weight i was MUCH happier. Did everything the 400 would do and did it easier.
Well darnit im gettin it lol. If it brakes yes i know you guys told me so, but oh well $900 seems like a damn good deal. I put some Camshafts above from summit that i want to get. Im thinkin the 1102 because its less aggressive and smooter idle. What you guys think, i figure why mess with putting a stock one in when a new on is $54. Unless you guys have tried somthing like the 1103 and liked it. Im going pretty mild.
search summit cams.
some people have had problems.
local frind of mine had few go bad. switched to comp cams and perfect. thay offer good 4x4 specific cams also.
remeber 400sbc = tourqe
and big heavy truck/blazer = need bottom end. not top end.
horse power = keep you movin on top end.
tourqe = gets big things movin on bottom end.
so pick a good bottom to mid range cam. dont plan on twistin it over 5k much. i never had to on my last one. it moved my 7klbs truck around just fine .
http://www.summitracing.com/search/Department/Engines-Components/Part-Type/Camshafts/Brand/COMP-Cams/Make/CHEVROLET/Engine-Size/6-6L-400/Engine-Family/Chevy-small-block-Gen-I/Cam-Style/Hydraulic-flat-tappet/Camshaft-Usage/Truck/?Ns=Rank%7cAsc
and get a true roller chain set. NOT a silent chain like stock. thay suck.
note most new cams require there springs over stock style springs.
some people have had problems.
local frind of mine had few go bad. switched to comp cams and perfect. thay offer good 4x4 specific cams also.
remeber 400sbc = tourqe
and big heavy truck/blazer = need bottom end. not top end.
horse power = keep you movin on top end.
tourqe = gets big things movin on bottom end.
so pick a good bottom to mid range cam. dont plan on twistin it over 5k much. i never had to on my last one. it moved my 7klbs truck around just fine .
http://www.summitracing.com/search/Department/Engines-Components/Part-Type/Camshafts/Brand/COMP-Cams/Make/CHEVROLET/Engine-Size/6-6L-400/Engine-Family/Chevy-small-block-Gen-I/Cam-Style/Hydraulic-flat-tappet/Camshaft-Usage/Truck/?Ns=Rank%7cAsc
and get a true roller chain set. NOT a silent chain like stock. thay suck.
note most new cams require there springs over stock style springs.
So you dont like the 2 i listed above?? And haha, i dont think ive ever hit 3500 with my engine so i think 5K will never be seen on the next one lol. Heck it scares me to hit 4500 in my Bronco II which is where they make all their power. And thats a little 2.9 6cyl made for high rpms lol. So i think ill be just fine on that.
You know going to that 400 is how it starts
. Youll have that at your command and before long you'll have a FI496/th400/np205/d60/14ff. and a set of 40's on that thing
. Its called the snowball effect, and horse power and torque is where it all starts
. Youll have that at your command and before long you'll have a FI496/th400/np205/d60/14ff. and a set of 40's on that thing. Its called the snowball effect, and horse power and torque is where it all starts
You know going to that 400 is how it starts
Theirs no replacement for DISPLACEMENT!!!! haha Woo yes im very excited about the snowball effect haha
Oh and its a 408
Just remember, the same cam in a 305 and a 400 will act different in each engine. A cam that is fairly radical in a 305 will be slightly less radical in a 400, because of more cubes breathing. Just like a good set of heads, they will make a much better difference on a 383 or 400 than a 305.
Before you decide on your camshaft do some research on these 2 sites.
http://www.speedtalk.com/forum/index.php
http://www.chevelles.com/forums/
Theres a lot of good information on toady's engine oils and camshafts. Most companies that sell off the shelf camshafts are getting them from the same place, they just repackage and put their name on it. Those camshafts are usually made of cheap cores, regrinds, and 50 year old technology. A lot of people go that route and that's fine, just search those two sites before you commit.
COCHEV
1/2 ton status
Your machinest should be informing you on cam selection based on what you want to do with the motor and how he is rebuildig your heads. it all needs to work together.
Well im not gettin it machined, the guy thats building it and selling it to me is. He just sent me those last night after he said i would probly want a little more cam than stock, and he said both of those run very well in a 400. I just thought you guys might know more than me on which one i should spend and not kill my pocket anymore than i have to.
And i just looked at some forum stuff on those sites about the cam. They all are running strip cars mostly with different heads and going all performance. I will rarely rev this thing very high, and im not looking for a 12 second car or 500hp lol.
And i just looked at some forum stuff on those sites about the cam. They all are running strip cars mostly with different heads and going all performance. I will rarely rev this thing very high, and im not looking for a 12 second car or 500hp lol.
crashandburn
1/2 ton status
For a mild build that won't see a lot of heat they are ok, but a truck would do well with more meat in the walls. If you can, go with a decent 350 or a 383 instead. With the 383, I highly doubt you would know the difference from a 400 torque wise.
For a mild build that won't see a lot of heat they are ok, but a truck would do well with more meat in the walls. If you can, go with a decent 350 or a 383 instead. With the 383, I highly doubt you would know the difference from a 400 torque wise.
Well i am going for a mild build, which unless you count michigan as a high temp state, not really alot of heat either. Idk im pretty well set on the thing, so idk im pretty hard headed lol, when i blow the block i will start a thread saying i told ya so, and you guys can bash me then lol. Untill then, Im gettin a 408 SBC and thats that lol.
scooter122983
1/2 ton status
Destroke it and make a 350 you will be able to make more economical torque due to the shorter piston throw and spin it high if you need to.
Lol, i have no idea what you mean by that, and thats why i am not building it haha.
Someday i will build a sweet 350 for it with a nasty cam, or maybe build the 305, but at the moment with college and everything, having someone do it for me is way mo betta lol.
de-stroking it makes it a 377 doesn't it? Can't remember.
De-stroking a motor is like cutting a piece of your d...
De-stroking a motor is like cutting a piece of your d...
OUch that sounds like a bad time lol. I cant have that lol
scooter122983
1/2 ton status
actually destroking a motor allows it to fulfill a broader role. using a 327 crank makes a 350 using a 350 crank makes a 377 take a look and see if you feel that the outcome is worth the while.
shovelbill80
1/2 ton status
at least the thread was interesting
a 377 is a 400 block with a 350 crank. a 350 block with a 400 crank is 377 too............i'll take the long arm over the de-stroked motor all day long, especially when i want low-mid range torque.....desert racing would be a different story, where sustained rpms are needed.....put a 327 crank in a 400 and get 350 with a better ratio......Chevy's 302 was the best reving motor imo though.
350 with 400 crank = 383 btw. Both blocks have different bores. 4" vs. 4.125"
also a very good plant
when it comes to heavy vehicles, stroke is king IMO
YO Deulling, make sure we get an update ASAP when the motor is in.
also a very good plant
when it comes to heavy vehicles, stroke is king IMO
YO Deulling, make sure we get an update ASAP when the motor is in.
StevoandaRedK5
1/2 ton status
I'm running one of the Comp 4x4 cams in my 350 (12-235-2, top of the list sweetk30 linked to). I've been impressed with it. It has about the same lift as that Summit 1103, but definitely not as much duration. It idles smooth though.
I'd think about getting more cam than that 1102, and going with the 1103 if you're set on a Summit cam, otherwise there'll be some power on the top end you'll miss out on. That Performer RPM intake will do just fine. I never thought I would spin my 350 above about 4k, and the first time I hit some mud at WOT I saw why it was a good plan to to have a powerband up to 5-5500rpms.
I don't have much personal experience with 400's, but as far as the overheating goes, I say run it. GM offered it for 5 or 6 years in the K5's, and I've got a buddy with a stock one from '78 that's still running strong. Maybe it's not the best design ever, but if you've got a decent cooling system on a fairly stock motor, I wouldn't worry much.
My $.02.
