|
#1
|
|||
|
|||
451 or 500 B stroker?
Im looking into stroker kits at 440source.com. I noticed they had a 500ci kit for the same price as a 451 kit. My question is, how much reliability will i lose, and also will there be much difference between the 451 and 500
|
#2
|
||||
|
||||
Well, the 451 kit is for a 400 block and the 500 kit is for a 440. So, right off of the top, you need the correct kit for your block.
Reliability should be about the same. Both kits use the same brand crank, rods, pistons, etc. |
#3
|
|||
|
|||
http://www.440source.com/strokerkits.htm
look at bottom, they have a 400>500 kit |
#4
|
||||
|
||||
Well, the short pistons would be a weak point. the wrist pin is in the same area as the oil ring. This also requires the oil ring support rails. As it is Ross, it should be fine. If it were any other company, I wouldn't even think about it.
The crankshaft will most likely need to have the counterweights turned down and the block will still need to be clearanced. Other than that, you get the same 500 CID as you would with the 440, with less rotating mass and a lighter block. |
#5
|
|||
|
|||
so how strong are all of these chinese parts from 440source. Im lookin to make some decent power with indy top end and a small shot, will this stroker kit hold up?
|
#6
|
||||
|
||||
Quote:
|
#7
|
|||
|
|||
Quote:
IMO |
#8
|
|||
|
|||
Personally I think the RB cranks stroke is perfect for a 400 block but another .400" is pushing it. But then again, I was wrong once years ago!
|
#9
|
|||
|
|||
Quote:
of course i dont have any experiance building bb's |
#10
|
|||
|
|||
The 1.120" dimension is the compression height (center of pin to piston face) not the total height. Looks like a very large SB chebby piston and weighs a mere 492 gr. We Mopar folks are used to nearly full skirted pistons so these do look rather skimpy.
|
#11
|
|||
|
|||
I have done many different combos, both in RB and B blocks. I personally like the 451 based on a 400 block and done with 6.76" rods. The pistons stays reasonable with 1.3+" compression height, it weighs around 530 grams and the oil ring stays above the pin hole. The displacement is about just right for a well performing street engine using stock style heads. With bigger short blocks, you are beginning to need bigger port heads too, or that will limit the performance potential. In my opinion, the pistons with a B-block, 6.76 rods and 4.15" are too small for street & strip use. The 1.1+"compression height is very little. Good combo for race use, but I wouldn't build a street engien with them. We have actually had a problem caused by the rings in the pin hole, so I don't like that design in an engine that sees use and miles. If I really wanted to build a big B-block, I consider a 4.25" stroke with 6.535" chevy rods a better combo for street&strip. Because of the smalle rrod nad rod jouornal, you won't have to do as much clearancing work either. The RB block on the other hand is still a bit too high for 4.15 stroke with 6.76 rods, the pistons will remain pretty bulky with 1.8+" CH. Never tried a "471" style engine, but that propably works very well too.
So, I think a 400 based 3.75" stroke 6.76 rod engine is a great combo. Lightweight moving parts and a strong performer with stock size heads. We still have one we built ten years ago, no problems with the short block. It's a pump gas engine that during these years have been dynoed twice, produced 649 hp at 6000 and 612 ft-lb at 5000 rpm with over 500 ft-lb from 2400 rpm (stage VI heads). With big port heads (440-1), but otherwise the same, the hp raised to 713 at 7300, but lost about 50 ft-lb of peak torque and all the low end grunt. I think the 4.15" or bigger stroke engines will be limited with small port heads, unless you really want to build a low end torque monster and do not care about peak power. For example, same kind of heads that the 451 lost all the low end with, worked just great in a 4.15" stroker giving over 500 ft-lb at 2200 rpm adn peak tq of 704 ft-lb, again with pump gas. Peak hp was found at 6600 rpm |
#12
|
|||
|
|||
I am now lookin into the 470 stroker using the chevy rods....this will actually still have good piston pin placement. What do you guys think of that stroker? I also will be using probably 440-1 heads
|
#13
|
||||
|
||||
Well, the 440-1 heads will feed lots of cubic inches and will produce tons of power at the 500 cubic inch level.
|
#14
|
|||
|
|||
Blue72swinger, I thought you were doing some sort of turbo 340 project. How's that going?
|
#15
|
|||
|
|||
Quote:
|
#16
|
|||
|
|||
I was going to do a small block turbo, but im boing a big block swap instead, havnt decided what the power adder will be, most likely nitrous
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Stroker | jtmoney | Dakota Truck Forum | 63 | 10-02-2002 07:00 AM |
318 stroker | TrxR | Performance Talk | 26 | 09-13-2002 12:01 AM |
360 Stroker | TrxR | Performance Talk | 9 | 08-06-2002 08:22 AM |
360 stroker | bobbyg | Performance Talk | 1 | 05-27-2001 08:56 AM |
Eagle 'RB' 4.15 Stroker Crank VS. MP 4.15 Stroker Crank VS. Welded Stock Steel | krownman | Performance Talk | 5 | 03-04-2001 11:47 PM |