The B20VTEC discussion thread

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Originally Posted by GSi_PSi

tinkerbell - it has been proven time and time again, bigger is better, for a bigger motor. Sure you can make 130kw with 2.5inch but im willing to bet anything you will have more power everywhere with 2.75inch. dont give me all this bullcrap on backpressure, there are people running 3 inch in the states for their b18c/b20 builds making exellent power. Australia is just too stupid to keep up with the times

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It might show it that it gain @ WOT, but it'll lose a considerable amount of power @ 50 % throttle. Where do you spend most of your time driving i/e street car? AT WOT or cruising say with 10-40%? throttle?

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Originally Posted by tinkerbell

2.75in is not required to make 130kw...

wouldn't you agree?

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Your right Tinkerbell. If i remember right, we were running 2.5inch system making a little over 150kw's

argh

torn between going b20 or stick with my b18 and do cams and 4.9 fd



benson, how did you go about making 150kw? how much would i realistically have to spend to get there (considering a workshop will be doing it all)

If you want to keep it reasonable, you have to DIY.

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Originally Posted by Bludger

If you want to keep it reasonable, you have to DIY.

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i don't have the mechanical knowledge or the tools for that. wish i could watch/ help someone do something like this to learn. labor costs is what kills!

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Originally Posted by u mad?

argh

torn between going b20 or stick with my b18 and do cams and 4.9 fd



benson, how did you go about making 150kw? how much would i realistically have to spend to get there (considering a workshop will be doing it all)

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Realistically, adding up all parts used with bolt-ons close to $10,000. Don't forgot i did most of the work putting in the engine in and stuff. For that price in this day and ages, you can afford a K-swap (k20 or K24). Why do you think i went K-swap?

i fingered it'd be about 10k

edit- wow thats with no labor costs!

Sell your B series off and add 5k ontop and get a k24 in there :)

50% throttle ? So your saying you would rather have a bees dick more power on 50% throttle than overall at WOT ? You don't build your engine to cruise around as a daily most of the time.
Also where is the proof that you do lose power at 50% if you jump to 2.75". ? do you have any dyno sheets , comparison graphs 2.5 vs 2.75

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Originally Posted by u mad?

i fingered it'd be about 10k

edit- wow thats with no labor costs!

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and no machinist costs either!

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Originally Posted by GSi_PSi

50% throttle ? So your saying you would rather have a bees dick more power on 50% throttle than overall at WOT ? You don't build your engine to cruise around as a daily most of the time.
Also where is the proof that you do lose power at 50% if you jump to 2.75". ? do you have any dyno sheets , comparison graphs 2.5 vs 2.75

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I think you are missing the bigger picture here. Most Honda's built are daily driver 80% of the time. You want the low end torque and response to make it an enjoyable street car. Obivously once you step on it, you want the thing to move.

Who cares what size exhaust system you put on. I've seen car make power with crappy exhaust system. At the end of the day its up to the end user if they don't mind the level of noise of the exhaust whether it be 2.5, 2.75 or 3 inch

Hey guys,

My b20vtec is hooked up with a hondata s300 and the ecu is not enabling vtec with all wiring and hardware are fine..

could my ecu be playing up in anyway??

Cheers