175whp

[Fernflex]

Im supposed to go tomorrow to the dyno, so I will post videos and graphics.

[Luis325]

Fern having fun at work????
Love how the car runs man... LOL

[cheapshot]

I honestly can apprieciate a build like this, But its kinda dissapointing to see it only making what a stock m50 would :(

Edit: with a good tune im sure youll gain some power, probably will be touching around 200ish horse

So a 190 crank HP motor will put down 175 HP at the wheels? That's only an 8% loss if my figures are correct.

[darvo]

Im supposed to go tomorrow to the dyno, so I will post videos and graphics.

A que hora vas?

[Fernflex]

Little preview, a rocker arm broke @7,500 rpm.

I was only manage to get 180whp with the 19lb injectors @ 45psi, Im installing the 21lb injectors in the car.

[darvo]

Will you replace it and keep tuning it today?

*Time for HD rockers!!

[JJe30]

Very nice build.

[Fernflex]

Tomorrow they will replaces all rocker arms and installe the new heavy duty with the bigger injector and going to wait for the wasted spark to arrive to go back to the dyno.

Darvo: sorry I didnt call you, my mech planned everything and he didn't told me until the last moment.

[digger]

Little preview, a rocker arm broke @7,500 rpm.

I was only manage to get 180whp with the 19lb injectors @ 45psi, Im installing the 21lb injectors in the car.

so it broke at 7500rpm or afterwards?

can you snap some macro shots of the fracture face?

[ForcedFirebird]

You ran the stock single coil over 7500RPM? Bet it was real happy with that lol.

[darvo]

No prob!

Tomorrow they will replaces all rocker arms and installe the new heavy duty with the bigger injector and going to wait for the wasted spark to arrive to go back to the dyno.

Darvo: sorry I didnt call you, my mech planned everything and he didn't told me until the last moment.

[Fernflex]

Ebay Headers, Big Valves, Itbs kit.



HD Rocker Arms

[Fernflex]

Stock


HD

[digger]

i cant see 100% but in this particular case that looks like overload failure rather than a small crack propogated by fatigue which sunsequently grew to a size that caused catastrophic failure. This goes away to confirm that valve bounce could be the main factor factor which while an obvious conclusion it shows that peening is not a huge benefit against this mode of failure. The casting quality seems inferior to the original BMW rockers i have with me but it may just be the pics. The MM testing showed some rockers were 30% stronger in a single static test.

[Stephen]

Awesome to see a diy ITB setup done through to the end. Jealous.