just bought my 4ws prelude and looked up the engine code and see that its a jdm engine when i asked the previouse owner if he did a engine swap he said no its the japan model is this even possible for a car to come from japan with us specs but japan engine and tranny? and is it even compatiable with other b series parts??
Hey for real I need to know also I have the B2oa5 and still haven't been able to get an answer to this so you mega BUMP
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Me and my car we got this relationship I love her so bad but she treats me like shyte <3
89 2.0 si Fuel Injected b2oa5 5speed 4ws Barbados Yellow
89 2.0 si FI b20a5 5speed 4ws Blue FOR SALE
99 Accord a/t with 115k FOR SALE
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Me and my car we got this relationship I love her so bad but she treats me like shyte <3
89 2.0 si Fuel Injected b2oa5 5speed 4ws Barbados Yellow
89 2.0 si FI b20a5 5speed 4ws Blue FOR SALE
99 Accord a/t with 115k FOR SALE
yeah but my motor dosnt have a number after the a just b20a and i was hoping to get an answer from someone trying the same thing as me i want to put a vtec head on this block if at all possiable and if this was a swapped motor or is it really the stock jdm motor i read the wiki but the block is so similar to the others i dont see how it would be diffrent besides the hp : )
well damn I am sorry about that tried to help anyways hey let me know when you find out ok
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Me and my car we got this relationship I love her so bad but she treats me like shyte <3
89 2.0 si Fuel Injected b2oa5 5speed 4ws Barbados Yellow
89 2.0 si FI b20a5 5speed 4ws Blue FOR SALE
99 Accord a/t with 115k FOR SALE
sry i have this prob with my typing and texting i come off the wrong way just read it and sound like a prick lol just wanted to let you know :bigthumbsup:
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Me and my car we got this relationship I love her so bad but she treats me like shyte <3
89 2.0 si Fuel Injected b2oa5 5speed 4ws Barbados Yellow
89 2.0 si FI b20a5 5speed 4ws Blue FOR SALE
99 Accord a/t with 115k FOR SALE
All fuel injected 88/89 preludes sold in the US were equipped with the b20a5 engine. The b20a is a JDM engine, and was not sold in the US. The previous owner either was lying to you, or (more likely) simply didn't know that the engine had been swapped. Many people have bought b20a's and installed them into their USDM 3rd gens (including me). It's the easiest swap there is. You only use the b20a block and head, and reuse everything else from your b20a5 (manifolds, wiring harness, ecu, etc...). It's nearly identical to the b20a5, with the only real difference being in the tops of the pistons. They are not quite as dished, providing a slight compression increase.
As far as the wiki goes, don't put all your trust in them. Wikipedia is fact by committee, and can be edited by everyone and their dog. This one seems to be accurate as far as the 3rd gen engines are concerned. Pay close attention to the fact that there were 2 different variations of the b20a. The only similarities they have is their displacement. They are completely different from each other.
Finally, You can't bolt a vtec head onto a 3rd gen engine without extensive machine work and modification. Not worth the cost and effort involved. You would be much better off swapping in an h22a. There is actually some aftermarket support for this swap now.
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89 Prelude 2.0Si 4WS
91 Prelude Si - SOLD
colfax, i have and 89 2.0 SI with the B20A, and i need a transmission because my 5th gear is gone. Are you saying that the stock tranny for my car will bolt up too? Ive been trying to get this question answered for a mont and i keep getting different answers.
colfax, i have and 89 2.0 SI with the B20A, and i need a transmission because my 5th gear is gone. Are you saying that the stock tranny for my car will bolt up too? Ive been trying to get this question answered for a mont and i keep getting different answers.
Ok its been a while since I was on here, so let me set some information straight.
1. Do not believe anything from Wikipedia, they no nothing of this motor period.
2. No vtec head from any motor will bolt up to the B20a5 or B20a.
3. As long as its a B20a JDM verision of the B20a5, then everything will bolt right up. There is a B20a Accord motor and it looks similar, but does not tilt 18 degrees like our motors do, so do not buy it unless you confirm its for the 88-91 Prelude.
4. I support the H22/23 swaps into this chassis, I have the Billet swap mounts made for it and sell it.
colfax, i have and 89 2.0 SI with the B20A, and i need a transmission because my 5th gear is gone. Are you saying that the stock tranny for my car will bolt up too? Ive been trying to get this question answered for a mont and i keep getting different answers.
If you are wanting to know which transmissions you can use with the b20a in your 89, then the short answer would be to use any 5 speed transmission from either an 88 or 89 Prelude. That would be the easiest as it's a direct swap.
Now for the long answer...any 3rd gen transmission will bolt up to your engine and work. But be advised that if you decide to use one from a 90 or 91 Prelude you will need to modify the vss in order to have a working speedometer. I haven't done this myself, only read about it, so you'll have to dig a little for the how-to. You will also need to use the flywheel, clutch, and pressure plate for a 90 or 91 Prelude. The flywheel and clutch kit are matched to the tranny, not the engine.
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89 Prelude 2.0Si 4WS
91 Prelude Si - SOLD
so along these lines if i want to take a 2.0 from a 89 and drop it into a 91 2.1's place keeping the auto tranny from the 91 just flip the torque converter and flywheel and do the mods to the vss and it should be good to go? should i swap heads in the process?
so along these lines if i want to take a 2.0 from a 89 and drop it into a 91 2.1's place keeping the auto tranny from the 91 just flip the torque converter and flywheel and do the mods to the vss and it should be good to go? should i swap heads in the process?
Ah, that's a different story, as well as a nice thread jack.
you don't need to modify the vss if the transmission you are going to use in a 91 was originally from a 91.
But I know nothing about the auto transmissions in 3rd gens. I can't answer your question, with certainty, about what you need to do to fit a b20 to your 91 auto that was originally mated to a b21. But I would suspect that you need to use the starter ring from your b21, mount it to the b20, and reuse your torque converter.
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89 Prelude 2.0Si 4WS
91 Prelude Si - SOLD
so along these lines if i want to take a 2.0 from a 89 and drop it into a 91 2.1's place keeping the auto tranny from the 91 just flip the torque converter and flywheel and do the mods to the vss and it should be good to go? should i swap heads in the process?
All that you need to do to swap the old B21 to a B20 is to remove everything from the B21 and put it all on the B20 long block.
intake manifold and sensors
exhaust manifold and EGR pipe
all brackets, and sensors off of the B21 and swap to the B20
Etc...
The only thing you are technically swapping is the bare longblock.
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