Crankshaft mod
12-12-2013, 01:34 PM
#16
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12-12-2013, 03:08 PM
#17
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If you just wanted to put a 3.0 crank into a 2.5NA engine you would need custom pistons similar to the 2.8L turbo piston, the cost of these would make you think hard about using a 3.0 block and 16v pistons, assuming they can be relieved for the 8v head, which would need to be modded... and then you'd decide to just fit the 3.0 16v engine... and the cost of that swap makes one consider buying the 3.0 engine with the car included and just do a driver swap.
12-12-2013, 03:55 PM
#21
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i will do more research on it. I think I will do 3.0 crank and custom piston.
I think it's good start here :
http://www.broadfootracing.com/performance_parts.htm
I think it's good start here :
http://www.broadfootracing.com/performance_parts.htm
12-12-2013, 04:04 PM
#22
Burning Brakes
i will do more research on it. I think I will do 3.0 crank and custom piston.
I think it's good start here :
http://www.broadfootracing.com/performance_parts.htm
I think it's good start here :
http://www.broadfootracing.com/performance_parts.htm
12-13-2013, 05:21 AM
#23
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If you want some one with a good rep. and knowledge call Cris White @ http://www.944enhancement.com/ for your piston needs.
...not BFR!
...not BFR!
12-14-2013, 11:27 PM
#24
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Nope. Sorry, the 2.7 block is not identical to the 3.0. The 3.0 has more clearance cast into the bottom of the block and into the crank girdle for rod rotational clearance - which it needs for the additional stroke.
If you throw a 3.0 crank at a 2.7 block your rods will likely hit the inside of the case (depending on the rod used). You can clearance by hand if you're careful, or a Bridgeport does a professional looking job.
If you throw a 3.0 crank at a 2.7 block your rods will likely hit the inside of the case (depending on the rod used). You can clearance by hand if you're careful, or a Bridgeport does a professional looking job.
12-15-2013, 11:31 PM
#27
Nordschleife Master
Nope. Sorry, the 2.7 block is not identical to the 3.0. The 3.0 has more clearance cast into the bottom of the block and into the crank girdle for rod rotational clearance - which it needs for the additional stroke.
If you throw a 3.0 crank at a 2.7 block your rods will likely hit the inside of the case (depending on the rod used). You can clearance by hand if you're careful, or a Bridgeport does a professional looking job.
If you throw a 3.0 crank at a 2.7 block your rods will likely hit the inside of the case (depending on the rod used). You can clearance by hand if you're careful, or a Bridgeport does a professional looking job.
Really though, as others have said, the cheapest route is to fit a 3.0L engine complete rather than mod a 2.5L engine to a 3.0L
12-16-2013, 05:42 AM
#28
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..
12-16-2013, 06:05 AM
#29
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Nope. Sorry, the 2.7 block is not identical to the 3.0. The 3.0 has more clearance cast into the bottom of the block and into the crank girdle for rod rotational clearance - which it needs for the additional stroke.
If you throw a 3.0 crank at a 2.7 block your rods will likely hit the inside of the case (depending on the rod used). You can clearance by hand if you're careful, or a Bridgeport does a professional looking job.
If you throw a 3.0 crank at a 2.7 block your rods will likely hit the inside of the case (depending on the rod used). You can clearance by hand if you're careful, or a Bridgeport does a professional looking job.
Btw: is there any known case of successful modification to this stupid water passage change? I was looking at 3.0 list and nobody seems to be using 951 head with 3.0 block.
12-16-2013, 09:08 AM
#30
Nordschleife Master
From what I have read it can be done but requires some careful welding. I think why most people don't go that route is because you are still left with the smaller valves of the 2.5 head and it's easier and probably cheaper and more effective to just bolt on the 2.7 bigger valve head.