Re: OT Chevy motor switch 305/454

Posted by davpal on November 22, 2006 at 00:05:39 from (216.93.88.154):

In Reply to: OT Chevy motor switch 305/454 posted by Farm W/Junk on November 21, 2006 at 13:37:30:

Matt, If I could talk you out of swapping motors I sure would try on this one. I have done a lot of motor swaps and always wished I had stuck with the original type of motor after I was done. We have done small block chevy-jeep conversions, big block ford pickup swaps, big chevy-small chevy etc. One thing I learned from all of it is that , (except in the most extreme of motorsports) monster trucks, pro stock drag racing, a small block is usually much more powerful than a big block with even much more cubic inches. The big blocks unless properly prepared can be quite sluggish because of their tremendous recripricating mass. Piston, rods, and cranks are 50% heavier than a small block and rev much slower and more sluggish. We have a 87 chevy 1 ton with a 454 and the motor has had its share of problems over the years and is anything but "fast". It is not even close as lively as a strong 350. I have the same thing in a ford f-350 with a 460 fuel injected and it is about the same as the 454. They are both pretty sleepy! If you want a really STOUT motor find a vortec 350 out of a mid 90's pickup and put in a set of 1-5/8 headers, an rv cam and a nice dual plane intake with a 650 holley double pump carb and you will have a truck that screams power. No stock 454 will have close to the power you do. Remember, the 454 you are talking about is only about 230 horsepower. A good 350 can make that number look sick pretty easily. Then your motor will fit just like the 305 with no more weight and much more power. Most people only find all this out after they go through the trouble of putting in the big block. Trust me, the 350 is your friend. If you can find a 400 small block, better yet, although they get a little warm from the thin cylinder walls. Good luck.

Replies:

• Re: OT Chevy motor switch 305/454 Allan In NE 00:52:51 11/22/06 (0)

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