Hey guys, so the B21a1 is definitely and finally toast at 357'000 kms :/ it runs and revs, but it's got a pretty serious knock in the bottom end, so it's time for me to start thinking about building a real engine.
I'm in school now so I won't be building for at least 8 months, but I want to put a parts list together so that if I see someone selling a part I need, I can buy it and check it off my list.
So. What I want to do is build a B20A# engine N/A to have 160 wheel horsepower. So far I know I'm going to use a bored out B20 block to 83mm, then I'd like to use my B21a1 head to go on top.
1. Can I shave the b21 head to gain compression (how low can I go)? Is a copper head gasket a good idea?
For the bottom end I want to use H23 rods and high compression pistons. I'm also going to balance the entire bottom end.
2. Is there any stock pistons that have higher compression and fit? Do B16 pistons offer that?
That's basically as far as my knowledge goes unfortunately. However I'd like to do something different with the cams.
3. I've read some threads with b16 cam shafts mentioned. What the best combination of stock/other camshafts? Also, as far as sprockets go, is aftermarket a must to reach my goal?
And then lastly comes tuning, and the question of injectors.
4. Will I need bigger injectors? If so, any suggestions? And Tuning, I'd like to get it tuned so that it runs 100%, can you tune our stock ECU's or do I have to go Aftermarket?
So yea thats it Is 160whp unreasonable? Any idea of what this will cost me? I'm going to TRY and get as much as I can used or for a good deal. Anyway, thanks a ton for looking and I hope you guys can teach me a thing or two. Thanks,
Cory
I'm in school now so I won't be building for at least 8 months, but I want to put a parts list together so that if I see someone selling a part I need, I can buy it and check it off my list.
So. What I want to do is build a B20A# engine N/A to have 160 wheel horsepower. So far I know I'm going to use a bored out B20 block to 83mm, then I'd like to use my B21a1 head to go on top.
1. Can I shave the b21 head to gain compression (how low can I go)? Is a copper head gasket a good idea?
For the bottom end I want to use H23 rods and high compression pistons. I'm also going to balance the entire bottom end.
2. Is there any stock pistons that have higher compression and fit? Do B16 pistons offer that?
That's basically as far as my knowledge goes unfortunately. However I'd like to do something different with the cams.
3. I've read some threads with b16 cam shafts mentioned. What the best combination of stock/other camshafts? Also, as far as sprockets go, is aftermarket a must to reach my goal?
And then lastly comes tuning, and the question of injectors.
4. Will I need bigger injectors? If so, any suggestions? And Tuning, I'd like to get it tuned so that it runs 100%, can you tune our stock ECU's or do I have to go Aftermarket?
So yea thats it Is 160whp unreasonable? Any idea of what this will cost me? I'm going to TRY and get as much as I can used or for a good deal. Anyway, thanks a ton for looking and I hope you guys can teach me a thing or two. Thanks,
Cory