Performance upgrade

[Dannyboi750]

Hi ive got 2 m20b20 engines, one im about to drop into my 318 and one im going to rebuild eventually, i want to get alot of power outve the b20 mainly because its not very common, but i want a decent amount of power straight away so what would head upgrades/bolt ons could i do to make abit more power ( around 225hp )

[digger]

so you want double the power without touching the bottom end?

[Dannyboi750]

Pretty much as im going 2 be using another engine for that while i daily it

[Kershaw]

You're going to need boost.

That's the only way you're achieving your goal without touching the bottom end. 225hp won't happen on a 2.5l with just head upgrades/bolt ons and it sure won't happen with a 2.0l. Maybe a 2.5l with a roller cam conversion, 8k rpm, engine management, and ITBs... but if you do all that you might as well do a 2.8+ stroker.

[Dannyboi750]

How high would minor shit get me? Cam, valves injectors, exhaust etc

[Kershaw]

You have to realize you're starting with 127hp. Your biggest, easiest horsepower boost is finding a m20b25. 127 -> 168hp. That's a 40hp increase and the whole motor is going to cost you less than a good cam.

You might see 20hp with cam, injectors, exhaust, and a chip. And you've spent over $2000 to do that.

[Dannyboi750]

All i really want is for it to take off abit better so that should do for now, thanks ��

[digger]

its big $$$ to get good power and it becomes less and less street friendly.

Unfortunately the 80mm bore is a terrible start point as it limits what you can do with the head work. it would be an awesome project to build a small high revving m20 and smoke S14's all day long but then you will realise for not much more you can have a whole bunch more cubic inches building a stroker and it will be much more effortless performance

swap the diff with 4.27 or 4.44 ratio and remove a whole bunch of weight that will get it moving quicker. making more topend power wont help you at the bottom end of power curve

[Sail Boat]

Danny,

I would agree with what everyone has said. If you're just looking to get extra go off the line, go with a shorter differential.

However, I understand you're looking for uniqueness. There's maybe two or three b20's with turbo systems on r3v producing as much as 200 whp.

If you're on a budget, go with the b25.

[Dannyboi750]

Aight thanks people, i have a 4.44 diff and will chuck that in and see what happens i guess