b20b

B16, B18, B20
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b20b

By 92dxeg
- Mon Feb 08, 2010 3:28 pm #174092 how much boost could a b20b no vtec since the comprsion is really low
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By chrono404
- Mon Feb 08, 2010 4:19 pm #174101 Depends on many things
How big is your turbo? a t25(small) vs a t3/t4(medium) vs a gtr40(huge) will all have much different amounts of air volume being pushed at the same psi.

How good is your tune. Turbo Reliability is ALL(well 90+%) in the Tune. If your car is tuned good, then problems will be few.

Did you add new bigger low impedance fuel injectors? If you want to get any decent amount of power this is something you will want to do. Stock injectors wont get you far before they are running at 100% Duty.

Also food for though, the B20b has 3%(6mm vs 9mm) Thinner Cylinder walls then the B18a/b. If you want to boost, Going with the B18a/b would be a much better choice. The b18a/b also has low compression pistons, just like the b20.
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By Classiccarsrule85
- Mon Feb 08, 2010 4:25 pm #174103 ^what he said x2
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By Greasedmonkey
- Tue Feb 09, 2010 3:16 am #174220
chrono404 wrote:Depends on many things
How big is your turbo? a t25(small) vs a t3/t4(medium) vs a gtr40(huge) will all have much different amounts of air volume being pushed at the same psi.

How good is your tune. Turbo Reliability is ALL(well 90+%) in the Tune. If your car is tuned good, then problems will be few.

Did you add new bigger low impedance fuel injectors? If you want to get any decent amount of power this is something you will want to do. Stock injectors wont get you far before they are running at 100% Duty.

Also food for though, the B20b has 3%(6mm vs 9mm) Thinner Cylinder walls then the B18a/b. If you want to boost, Going with the B18a/b would be a much better choice. The b18a/b also has low compression pistons, just like the b20.


All this is good stuff except the last part.

B20b has an 8.8:1
B20z has a 9.6:1
B18b has a 9.6:1
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