So you think your Thermo is better than my thermo huh?
I am assuming you don’t know what I do for a living….
Work out of a turbine is based on turbine efficiency, specific heat capacity of the gas, expansion ratio, inlet temperature, and mass flow rate.
Given his setup he has a very low compression ratio and a camshaft that doesn’t allow a very good gas exchange process (I am assuming a few things because the only spec he gave was the lift). So that means (all things being equal of course, I am well aware of how much things can get tweaked with calibration changes) the inlet temp, mass flow, (the Cp should only be mildly affected and can probably be ignored) are going to be low. If you take a look at the equation and you relies when those values are low the affect turbine power output is huge. So until that turbine gets going and the exhaust mass flow rate, inlet temp, etc get up you have a dog on your hands. Couple that with a manual trans (read: not being able to easily build boost on the line). Too bad there aren’t any aftermarket VGT’s available (that I am aware of). That sure would help (at an overall efficiency loss of course)
I am not saying you can’t make it work, it just will be far from optimized.
But lets say he throws a turbo on this car and it runs 10’s, everyone would say “Yay he fixed it!”, but the truth of the matter is this car should have been running 10’s NA…
If your only goal is to pull the wheels off the ground, just mess with the
suspension. It should be pretty easy do that if you are willing to make some sacrifices and change a few things like CG, spring rates, damper rates, instant center etc. It might end up handling horrible, but it all depends on what you are willing to sacrifice to gain in other areas.
The root of the matter is that he made a couple mistakes and now he is trying to fix it. There is nothing wrong with that, but there are two ways to go, fix it right or bandiad fix it.
I am really not trying to rag on him, what method he chooses should be based completely on his goals and money. As much as I hate to admit it, sometimes the bandaid approach is the best one depending on what your cost constrains and goals actually are. That just never aligns with me because I am an engineer and I like things optimized whether is a car or something as stupid as the parking arrangement in my driveway.
If it was my car, I would talk to the machinist about the feasibility of getting a different set of pistons to get the compression up in the 10’s and a good camshaft first.