whats the naturally aspirated limits power wise of the m20

[natorious]

what kind of power levels have been reached with the m20 (and have it still be able to be consided an m20)

[E30godz]

what are the natural limits of your wallet?

[Jordan]

I would say about 250 hp at the crank.

[318driver]

I would say about 250 hp at the crank.

what would have to be done to get #s like that?

[Jordan]

Full 3.0L buildup
Aggressively ported head
Larger valves
Lightened and blueprinted internals
High C/R
Dbilas multi TB intake
Aftermarket engine management
Upgraded fuel system
Extensive exhaust work

When all is said in done, IF you manage 250hp, it likey wont be overly street friendly, and pump gas wont be its friend.

[SlammedE30]

Full 3.0L buildup
Aggressively ported head
Larger valves
Lightened and blueprinted internals
High C/R
Dbilas multi TB intake
Aftermarket engine management
Upgraded fuel system
Extensive exhaust work

When all is said in done, IF you manage 250hp, it likey wont be overly street friendly, and pump gas wont be its friend.

Exactly, and double word to the pump gas comment.
-Ted

[matt]

you forgot a cam with huge lift and overlap.

Matt

[Jordan]

you forgot a cam with huge lift and overlap.

Matt

Yeah, just toss a 302 cam in there with 12mm lift. That should do it.

[bmwannabe]

shit i thought you could make more than that NA. Heres an example: 171 base+24(JC chip)+10-20 full exhaust+ 41 Dinan intake manifold + 15 cams valve work ect... Thats 266 conservatively. Now the Dinan manifold may be less, but their claim is 41, correct me if im wrong on all of this.

[Jordan]

Lets just say this...

a m20 build to the limits of street friendlyness has less hp then a s50 with a intake & chip.

[Charlie]

I'd say with a 15k budget, ~240-250 crank hp would be tops.

3 litre crank, ITB's, MAF, high comp pistons, 288-302 cam, etc.

-Charlie

[Charlie]

shit i thought you could make more than that NA. Heres an example: 171 base+24(JC chip)+10-20 full exhaust+ 41 Dinan intake manifold + 15 cams valve work ect... Thats 266 conservatively. Now the Dinan manifold may be less, but their claim is 41, correct me if im wrong on all of this.

The "Gran Tourismo" method of modding doesn't work in real life.

The conforti chip on the 2.5 M20 gets you about 14 hp, a full header system with an exhaust nets you about 5 hp, cams depend on the rest of the motor, and that Dinan head peice has been pretty much shot down by every reputable source.

-Charlie

[nando]

you should mention that the JC chip doesn't give you 15hp peak, but 15hp in other areas of the powerband (effecively giving you more area under the curve)

[Jordan]

shit i thought you could make more than that NA. Heres an example: 171 base+24(JC chip)+10-20 full exhaust+ 41 Dinan intake manifold + 15 cams valve work ect... Thats 266 conservatively. Now the Dinan manifold may be less, but their claim is 41, correct me if im wrong on all of this.

Thanks for that, I was sipping a soda, and as I read that.. I spit it all over the keyboad because I was laughing so hard.

[Charlie]

shit i thought you could make more than that NA. Heres an example: 171 base+24(JC chip)+10-20 full exhaust+ 41 Dinan intake manifold + 15 cams valve work ect... Thats 266 conservatively. Now the Dinan manifold may be less, but their claim is 41, correct me if im wrong on all of this.

Thanks for that, I was sipping a soda, and as I read that.. I spit it all over the keyboad because I was laughing so hard.

Don't forget to add in stage 3 weight reduction and a set of super slick tires.

-Charlie