Crank
01-19-2001, 05:28 PM
#1
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Join Date: Jan 2001
Posts: 210
I was reading a back issue of SCC and in the Technobabble section, they were talking abou taking the crank and rods out of a vg30 and putting them in the vq30de thereby increasing the displacement to 3.4 litres. Is this possible/plausible and how much would it cost. If it is doable why doesn't anyone else do it?
01-20-2001, 01:53 PM
#2
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Join Date: Oct 2000
Posts: 866
Originally posted by Moe
I was reading a back issue of SCC and in the Technobabble section, they were talking abou taking the crank and rods out of a vg30 and putting them in the vq30de thereby increasing the displacement to 3.4 litres. Is this possible/plausible and how much would it cost. If it is doable why doesn't anyone else do it?
I was reading a back issue of SCC and in the Technobabble section, they were talking abou taking the crank and rods out of a vg30 and putting them in the vq30de thereby increasing the displacement to 3.4 litres. Is this possible/plausible and how much would it cost. If it is doable why doesn't anyone else do it?
I think many of the folks on this BBS are *excellent* for advice on bolt-on mods, but if you require an answer on a more technical question, it's hit or miss.
I'm sorry, but I do not know what to tell you about the crank transplant you mentioned. My guess is most Nissan dealers will not only not have a clue, but they will not try to find out for you. Good luck with that.
01-22-2001, 10:08 AM
#3
Why? Because you have know what the **** you are doing that's why. Swapping engine parts between engines requires intimate knowledge of BOTH engines. You have to know the bearing journals are the same for the main caps and the rods, you have to know what kind of compression your going to end up w/ after shoving the piston up xxx more in the bore. And is this new compression gonna be able to run on pump gas? Is the new compression gonna be compatible w/ ecu program you currently have? Hell you might end up w/ so much knock, it might run worse after spending 3k getting it built(if it's even possible) Is the piston now gonna contact the exhaust or intake valves at TDC?? Who knows? Hell w/ too much stroke increase, the side of the rod might hit the side of the block at the crank's furthest throw.
That SCC article was THEORY only. Very, very far from reality.
That SCC article was THEORY only. Very, very far from reality.
01-22-2001, 03:19 PM
#4
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Join Date: Oct 2000
Posts: 866
Originally posted by Jeff92se
Why? Because you have know what the **** you are doing that's why. Swapping engine parts between engines requires intimate knowledge of BOTH engines. You have to know the bearing journals are the same for the main caps and the rods, you have to know what kind of compression your going to end up w/ after shoving the piston up xxx more in the bore. And is this new compression gonna be able to run on pump gas? Is the new compression gonna be compatible w/ ecu program you currently have? Hell you might end up w/ so much knock, it might run worse after spending 3k getting it built(if it's even possible) Is the piston now gonna contact the exhaust or intake valves at TDC?? Who knows? Hell w/ too much stroke increase, the side of the rod might hit the side of the block at the crank's furthest throw.
That SCC article was THEORY only. Very, very far from reality.
Why? Because you have know what the **** you are doing that's why. Swapping engine parts between engines requires intimate knowledge of BOTH engines. You have to know the bearing journals are the same for the main caps and the rods, you have to know what kind of compression your going to end up w/ after shoving the piston up xxx more in the bore. And is this new compression gonna be able to run on pump gas? Is the new compression gonna be compatible w/ ecu program you currently have? Hell you might end up w/ so much knock, it might run worse after spending 3k getting it built(if it's even possible) Is the piston now gonna contact the exhaust or intake valves at TDC?? Who knows? Hell w/ too much stroke increase, the side of the rod might hit the side of the block at the crank's furthest throw.
That SCC article was THEORY only. Very, very far from reality.
I've asked all three of my local Nissan/Infiniti dealers about part and/or engine swaps and upgrades, and none of them seem to know or care. They just don't seem to want to mess with it. That's understandable. I conclude there are no inexpensive, practical answers to be found at a Memphis Nissan dealer on this general topic, if anywhere. Oh well...
Thanks for the input.
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