I finally got my turbo lancer on the dyno. I'd say going from 150 engine hp to 190 wheel hp is pretty good for about $3k. This was running on a 7lb wastegate spring that only ended up getting about 5.5lbs of boost in the manifold. It's a really small amount of boost, but it's also extremely safe and reliable. You'll notice that torque starts to dip around 5k rpm. That's from knock and the ecu pulling timing. That's happening because of my bad air filter placement sucks in a lot of hot air and I should probably lower the afr to 11.5.

 

Did you think about throwing on a boost controller for the 1.5 psi? Would probably push you over the 200 mark. I'm in the middle of my build right now with a 7 psi spring as well and am considering a boost controller to get to that 7 psi.

 

You're probably right, but if I do decide to up the boost I'll throw on the stock one at 11lbs. Before I do that I need to sort out some fueling issues from not having boost referenced fuel pressure and some false knock that's pulling timing.

 

Well if you went from 7 spring psi to 5.5 manifold thats a loss of 27% ish. If we apply the same ratio to the 11 psi spring you'll pull around 8.6. That would definitely be over the 7 psi threshold of most builds on the stock engine. You'd probably need to throw some ARP headstuds and a decent gasket in the head to do that.

Also false knock? Just pull the sensor