boost

[kowalski]

so what are you m20 guys running for boost in those things? and what kind of numbers are you all putting down.

[matt325is]

2.8l low compression m20, Megasquirt engine management (fuel only currently) and 80lb/hr injectors.

8psi put out 222whp and 255wtq
18psi and had 329whp and 405wtq (and rising, stopped at 4200 due to a spark blow-out).

matt

[Sean]

Matt, when you say low compression, how low are we talking?

What does your power curve look like?

[matt325is]

Its about 8.3:1 using ross racing pistons and a .080" MLS head gasket. Here is a page with my dyno graph information, read below to see the results and comparisons.

http://www.mkosonen.com/dyno.html

Dyno Dynamics dyno's read about 17-21% lower than dynojet on average, so I went with the low of 17% to calculate the numbers.

I'll be running coilpacks with Megasquirt this summer and plan to hit 425whp (in other words, around 500bhp). Free dyno time is good ;)

Dyno video http://www.mkosonen.com/mattsdynos.avi

I can't wait for MAY!

matt

[Sean]

That's awesome, matt!

I was planning on bumping my compression up to around 9.1 when I do my stroker. Then i was thinking of maybe doing 7-8 psi down the road sometime - nothing huge, but enough to make a difference.

That would be doable, right?