Cut some oomph from the pa-pa.

I have decided to drop the boost by lowering the settings on the waste gate. It has been difficult to accurately pin down the waste-gate pre-set but as best I can tell it is around 7-9 psi, or a little higher than listed for the car I removed it from. Could be they under report the numbers or that someone installed a higher pressure actuator to pick up some HP. Either way it is clearly too much for my old girl and contrary to my low pressure = low risk mantra. Don't get me wrong it was fun jabbing it, clearly hopping that little motor 40-50%. However it will only scoot for about 15 seconds before the carburetor bowl drains (boost is higher than the fuel pump) and even without a muffler I can hear the pinging. That is bad. The guts of the 134 are stout, I bet they would handle another 60 hp just fine but the complexity of the system to maintain it is daunting. At 4 psi of boost my risk meter stays happily in the green zone and all the bad stuff should go away. In order to hit my target I am referencing this forum's article: Toyotanation.com
With luck I will have time to cut it open and cut it down over thanksgiving.

http://www.toyotanation.com/forum/t126750.html

Die off

Got much of the plumbing done and the air cleaner mounted. This let me do some more testing. On long pulls it will just cut out like a switch. I think the boost is overrunning the fuel pump. Do I turn down the boost, build a draw through or up the pump pressure. Bah, choices.

IT LIVES!

Ok, this is early but I just got it in and running! It took 3x longer than I figured and it was after dark before I was able to drive it around town but it did work and with fewer hiccups than I could have wished for. I have a leaking oil line, mounts to build and have just cobbled together an intake system for testing but it works. Power gain is substantial and predictable just like I had hoped. I still think I need to turn the boost down. I can not hear any pinging but for the moment I am simply running it rich on the old carb. Whistles like a banshee. Lots of work and tests to follow but I was lucky to get this time off from working on the well from the wife. More to come.




Link to video of her first run.