Skip down to bold letter for just dyno results
Well some of you may be following some of my posts but I have ventured into the realm of modding turbos. I have had the goal of getting a turbo for us middle of the road guys. Not looking to break the bank but want to make it into the 500+ hp range without investing mucho $$$$ in mods. It seems like 175cc injectors seem to be to safest bet to guarantee 500+ hp but with some of the turbos out there the trucks can be smokey with really high egts...
I have tried a bunch of different variations which I will not go into here. I have finally found one that meets all my requirements. I am hoping to still tweak the turbo a little bit but I feel that the gains might not be noticed much by the seat of my pants so I am starting to dyno my results. I will use the same parameters for each dyno run so as i change things on the turbo I can compare dyno results. I practiced a lot with my dyno guy and made 10 runs. They were all very close for the last 6 runs so I should be pretty consistent with all my changes.
Also one of my goals were not to chase every bit of hp using a wide variety of mods. I wanted to be able to offer a pretty sure bet of breaking 500+ hp without being super smokey and not having to buy every little supporting mod.
So the only hp mods to my truck: 68mm KC turbo, 175cc/stock nozzles, tuner, exhaust... thats it (well I am supposed to have a 58v ficm but it only reads out 48v and is not supposed to do very much)
Here are the mods that I did not put on the truck because I feel you get very little bang for your buck with these mods compared to others: ficm tune, water/meth kit, aftermarket air intake, ported intake manifold, headers, intake elbow, bigger intercooler, new y-pipes, etc... I am not saying that those don't do anything or that they wasted mods. I was just looking for the cheapest route to hit 500+ hp
AND I MADE MY GOAL
here is the dyno graph
I would like to point out a few things on the graph that interest me. I have always wondered the affect of stock nozzles and I think the dyno graph shows it. The torque curve is no very flat and I feel that is because as the rpms go up the stock nozzles have a hard time keeping up with flow. The stock nozzles put out plenty of fuel at low rpms (where most people drive) but when it gets up there the pulse of the injector mixed with the stock nozzles prevent the fuel from keeping up with the demands of the turbo/air.
Also the hp curve is very flat and does not increase as rpms go up, i wonder if that also has something to do with the flow of the nozzles???
I will post some video in the next post.