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Topic Review (Newest First)
01-06-2013 05:56 PM
vinniekq2 100 pounds plus or minus.aluminum heads on a BB are close to the weight of a small block with iron heads. The rat takes up a lot more space. The fuel injection helps a lot with bottom end and mid range torque. Total HP is similar
01-06-2013 05:50 PM
swb-big boy And how much difference in weight
In the two?
01-06-2013 05:39 PM
swb-big boy On the 355
01-06-2013 05:36 PM
swb-big boy So what's would be the HP range with the stock heads on .30 block and comp cam n lifters .when I do the fi set up?
01-06-2013 05:17 PM
vinniekq2 A 380 HP 454 will make 500 pounds of torque and not need to rev past 5,000.Its a tire melter and very easy to drive as the power is linear.
01-06-2013 05:05 PM
swb-big boy thanks alot .im not lookin to set any records just want a good sound and good power for less cost.
01-06-2013 01:24 PM
vinniekq2 the 454 bored 030 is 460
a 500 HP 454 would be a mild build that revs 5800 to 6000 RPM making over 500 pounds torque. A 350 would need closer to 6800 rpm to make 500 hp and would require cylinder heads that flow 280 cfm, a roller cam(rough idle) big carb or modified fuel injection. The 350 would be a beast and expensive to build with moderate street manners. the torque would likely be 50-70 pounds less.
If you raced the engines against each other the performance would be close with a slight edge most likely to the 454.The small block 350 would need more gear to be close in performance.The small block is a lot lighter and easier to fit an engine bay,if that matters.
I use a small block for weight savings and handling.
what do you need/want
01-06-2013 11:35 AM
swb-big boy one more stupid ?? the 87' heads on the small block that have the valve covers that mount with bolts in center of the covers .. r they considered vortec heads???
01-06-2013 11:26 AM
swb-big boy only reason for second guess n is 355 is fresh and is alot less weight.yes what more could it take to make near 500hp?
01-06-2013 01:05 AM
cdminter59
Quote:
Originally Posted by vinniekq2 View Post
big difference between a 500 hp 355 and a 500 hp 460

yes you can make 500 hp
Vinnie, I think you had better explain to him what it will take and cost for a 500hp tbi or tpi engine if he didn't want to rebuild the BBC.
01-06-2013 12:36 AM
swb-big boy when u say diff u talkin ft lbs
and waight. i got 355 and 454 not 460
01-06-2013 12:19 AM
swb-big boy so whats better tpi/tbi?
01-05-2013 11:26 PM
vinniekq2 big difference between a 500 hp 355 and a 500 hp 460

yes you can make 500 hp
01-05-2013 11:18 PM
swb-big boy have n second thoughts on the bb .im running a 87'block n heads now its a 355 im really thinking about just makin it tbi or tpi (i love the throttle response) its fresh maybe 2k miles on motor. its got comp cam n lifter setup.I have never been a fan of carb.im runnin a 750 holley double pumper was told its to much for my motor ??? can i make close to 500hp with the sb? whats better tpi/tbi??
01-05-2013 07:58 PM
cdminter59
need skilled info

I am sorry but you have a set of dished pistons in the bottom end. If you were to use the 781 heads you would have a compression ratio of 7.487. With this setup you will need to use a RV cam. Something like X4 254H. You will have good low end and mid-range power. The engine would have around 369 hp @ 4500 rpms and 510 lbs torque @ 2500 rpms. This will be fine for shows but not the track. BTW it would be your best interest to sell all the COMP .550/292 camshaft parts.
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