Hello guys, i need to know what is the diference between this swaps, im gonna invert some money on my car and i want to know where is more reliable and what means …
Thank you :shy:
ls=1.8L w/vtec head
crv=2.0L w/vtec head
i think.
They’re really the same thing. Rember that the B18A/B block and the B20 block are the same. The difference in displacment is because the B20 block has 84mm cylinders while the B18’s have an 81mm.
Whether you use the B20 or a B18 block, the work to the head is the same. You still need to tap an oil line in the same spot, and you still need to plug the same oil hole in the head.
The only difference between the two is that its recomended that the combustion chambers of the VTEC head be opened up to 84mm to match the B20 block. All VTEC heads have combustion chambers of 81mm and when thats mated up to an 84mm cylinder, there is a little lip there.
Other wise its all the same. You still need to strengthen the bottom end, both blocks still bolt right up to your car, both blocks will accept the same trannies, both blocks will use the same fly wheel. I think that answers the question you were asking. If you have any others, feel free to ask.
-Steve
Is the LS/Vtec a very difficult job to do? How would it be compared to putting in cams?
Originally posted by DAY U IZ
The only difference between the two is that its recomended that the combustion chambers of the VTEC head be opened up to 84mm to match the B20 block. All VTEC heads have combustion chambers of 81mm and when thats mated up to an 84mm cylinder, there is a little lip there.
I believe this is referred to as “de-shrouding” ?
Originally posted by french machine
Is the LS/Vtec a very difficult job to do? How would it be compared to putting in cams?
Its not difficult at all. If you can run an oil line and wire up VTEC by adding 3 wires to your ECU, and replace a head, thats all you need to do. Obviously there is a little more too it, but those are the major skills required.
However, you must take the head to a shop to have the oil hole plugged. Do a search, there are many posts on the topic.
-Steve
Originally posted by smokInteg
[B]
I believe this is referred to as “de-shrouding” ? [/B]
I believe you are absolutely correct. Thanks.
-Steve
Originally posted by french machine
Is the LS/Vtec a very difficult job to do? How would it be compared to putting in cams?
This is not even comparable. If you want to build a ls/crvtec you need to do it right and rebuild the whole engine, otherwise your asking for problems. So dont compare it to cams, think of it as its a whole lot like rebuilding a new motor plus a couple mods for the oil lines. HTH
What are the pros and cons of ls/vtec or b20/vtec compared to a regular vtec engine. Are they just as reliable any other vtec engine? Are there set backs as far time longevity of the engine (refferin to “frankeinstein” swaps)?
Originally posted by thederrickm
[B]
This is not even comparable. If you want to build a ls/crvtec you need to do it right and rebuild the whole engine, otherwise your asking for problems. So dont compare it to cams, think of it as its a whole lot like rebuilding a new motor plus a couple mods for the oil lines. HTH [/B]
Yeah, sorry about that. My explination was for just droping a VTEC head on an LS block, which is really a half-azz LS/VTEC. To properly build an LS/VTEC you need to completely re-do the bottom end. I’m not even going to get into that.
LS/VTEC was once viewed as a poor mans way to VTEC. This is not true. While that is one way to build it and to look at the motor, LS/VTEC’s have become a whole new engine in the line up of engine swaps. If you really want to know what they have to offer and what is neccessary in building one (cost and parts) do a search on the internet. There are many sites that discuss it in depth. I suggest using www.google.com first.
Not many people are going to talk about it on this board because it has been discussed many many times. Its kind of a dead horse, and we’re tired of beating it.
-Steve
Originally posted by DAY U IZ
[B]They’re really the same thing. Rember that the B18A/B block and the B20 block are the same. The difference in displacment is because the B20 block has 84mm cylinders while the B18’s have an 81mm.
Whether you use the B20 or a B18 block, the work to the head is the same. You still need to tap an oil line in the same spot, and you still need to plug the same oil hole in the head.
The only difference between the two is that its recomended that the combustion chambers of the VTEC head be opened up to 84mm to match the B20 block. All VTEC heads have combustion chambers of 81mm and when thats mated up to an 84mm cylinder, there is a little lip there.
Other wise its all the same. You still need to strengthen the bottom end, both blocks still bolt right up to your car, both blocks will accept the same trannies, both blocks will use the same fly wheel. I think that answers the question you were asking. If you have any others, feel free to ask.
-Steve [/B]
That was a perfect help, thank you man… well, i want to now if its possible how is called a Bseries with turbo ? or supercharged…? whats the abreviate that is usual used?
Turbo, Supercharges and sometimes NOS are refered to as Forced Induction. The abreviation for that F.I.
Yes you can do those an LS/VTEC or CRV/VTEC motor, but you’re not going to be able to fit a Jackson Racing supercharger in your G2. You’d have to use the Vortech one and thats gonna be a lot of money and time.
Turbo would be the way to go.
_Steve
damn thats true… long time i had a civic 88-91 hatch (called shoes here) … and that was a real monsta!.. with a B16C1 Engine Swap and Garret Turbo , with MSD Ignition, Spark plugs , cables, headers, CAI, porting … etc… i ran 7.98 in 1/8 mile…
the only thing was he lived around 2 months =PPPPPPPP
because pistons was broken
pretty lesson =)
Gotta be careful though, the b18a and b20, have different type’s of sleeves, b20’s have one solid sleeve, compared to a b18a, thats why it’s kinda bad to really rev up a b20 high, usually what i hear is them always cracking and having to be resleeved