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lets talk motors BBC/SBC for a mud/sand/snow blazer

mudhog

THEGAME
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ok i dont know much about BBC motors and have always been told they dont like high rpm's. so my next blazer i already have a fair built sbc but im wondering about maybe going bbc. so if you are going to build a mud/sand/snow blazer what would you put in? BBC OR SBC and why?
 
A big block will spin just about as much as a small block

Unless you want to go above 6000 rpm
 
depending on how much money you throw at either of them, they can do just about whatever you want haha. But yes generally big blocks are more low end, but they will go up to 5-6k in stock form.

Depends on how much you want to spend as well. Cant beat a sbc for price efficiency.
 
well i want to be able to turn 42's im running 14ff dana 60 both with 5:13's and detroit locker front and rear. the 350 i have now turns 40's good but i see lots of people running 454's as well and am just wondering how worth it it would be to go big block
 
Basic tule of thumb is a engine with a long stroke wont like being redlined,they make the most torque at low RPMs so there's no need to make it wind out,though they WILL,and scatter if you push them too far!...but you can beef up an engine with a long stroke to make it live at higher rpms,its not cheap though.....an engine with a short stroke will rev like a chain saw,and be less likely to toss a rod ,but will need to be revved up to get the most HP and torque..
Gearing plays a factor too,if you have low gears you'll want a motor that wont mind being buzzed up higher,and the opposite if you have high gearing...
In my experience ,small bock 283's,307's and 327's like to wind up,having shorter strokes than a 305 or 350,or 400 SB...the 400 on stock form is a lot like a 454,they dont need to be wound up to get the maximum torque..427's will rev higher than 454's with fewer failures on stock form..

The 292 straight six has the longest stroke of all the six bangers,the 230 and 250's have shorter strokes and can be wound up higher ,but still deliver pretty decent low rpm torque..

I liked the sixes for plowing,the combination of good low end and not much HP made them push snow without being as likely to spin the wheels,they just lumbered along...
I had 3 454's in different trucks and liked them a lot too though!..nothing beats a BBC for under hood "oohs and ahhs"...:D
 
This is around 500hp, I want 700

454 5.13's 40's

 
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Best upgrade I ever did was sell my ol TBI 350, and purchase a Vortec roller 454 and slap a TBI on top of it. With the roller cam and roller rockers it goes to 5500 all day long without missing a beat. Now, the tranny gauge I had this weekend lied to me, so the tranny wasnt fond of 3min straight of 4k going 2mph with my one Windstar fan (the one over the tranny cooler of course:rolleyes:) not working and then and puking out of the dipstick twice. But, youl have that at Mudfest.
 
If your gonna spend the money get a LS series engine and if 500+ Hp on near stock components isn't enough slap some forced induction on it.

Lighter and more cost effective then dealing with the old iron
 
427's will rev higher than 454's with fewer failures on stock form..


Sorry this is just untrue, if you compare a Hi-perf 427 to a lowly smog 454 truck engine MAYBE. But Apples to Apples the 454 wins more HP and TQ at lower RPM and every bit our more relaible then a 427

Its the same argument from all the old farts who say the 283 is better then a 350 "the shorter stroke lets it rev" which is utter BS!! The bigger engine can make more HP and TQ with out having to "rev"

Lets be honest , the only place for a High RPM engine is VERY light vehicle with DEEP gears and an owner/driver with even deeper pockets.
 
great analogy Gus!

I'm in the BBC club, really glad I did, pulling heavy truck on 39.5's w/ 4.56's I have no problem with power, but mud especially you will love the power and lower rpm torque, sand and snow its just fun to have it, but I wouldn't say you Need it.
Weight, drivetrain losses, and big tires will eat horsepower up.
this is one case where too much is just enough.:pimp:
 
Sorry this is just untrue, if you compare a Hi-perf 427 to a lowly smog 454 truck engine MAYBE. But Apples to Apples the 454 wins more HP and TQ at lower RPM and every bit our more relaible then a 427

Its the same argument from all the old farts who say the 283 is better then a 350 "the shorter stroke lets it rev" which is utter BS!! The bigger engine can make more HP and TQ with out having to "rev"

Lets be honest , the only place for a High RPM engine is VERY light vehicle with DEEP gears and an owner/driver with even deeper pockets.


You basically repeated what I posted...:dunno:

I didn't say the shorter stroke engines were "better",I stated they will live longer at high RPMs than a engine with a long stroke will...

I agree the 283's and 327's were better for a lighter vehicle with low gearing like 4:56's,thats why they were so popular at the dragstrips back in the day--put one in a heavy truck with 3:08's and it'll be a slug!........and no argument from me that the engines with longer strokes make better torque and HP at lower rpms than the short stroked engines..which makes them a better choice for most of us who drive them on the street, or use our trucks as workhorses...lower rpms mean less wear,heat,and better fuel economy..

The mistake many people make is putting a long stroked engine in a vehicle with low gearing and revving it beyond the redline too much,it wont like that for long in stock form...they can be balanced and blueprinted and built up with forged cranks,rods,and other parts to increase their durability,but it takes a lot of cash to do so...

The 454's I had were either bone stock "smog" engines from 73-74 vintage cars,or ones that had a off road/towing cam and aftermarket intake & carb,I never felt the need to wind them up much over 3500 rpms ,when the tires were shredding well below that rpm..:D..
 
6.2 LS. Theres a blazer at the dunes witg one and it absolutley rips.
 

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