Forged pistons & turbo lag reduction
#22
Well since I get annoyed every time someone uses "turbo lag", here is a clarification:
Turbo lag is something from the 70's and 80's. Most turbos today will have no lag. Lag is by definition when you are at an rpm that the turbo can make 10psi of boost, you step on the throttle and it takes a certain amount of time to get to 10psi. That time is turbo lag.
Now what you are talking about is boost threshold. That's the point in the RPM range where the turbo is making usable boost pressure.
Ding ding ding, school is done!
Now go buy an EFR, run ALLOFIT and blow that bugger up!
Turbo lag is something from the 70's and 80's. Most turbos today will have no lag. Lag is by definition when you are at an rpm that the turbo can make 10psi of boost, you step on the throttle and it takes a certain amount of time to get to 10psi. That time is turbo lag.
Now what you are talking about is boost threshold. That's the point in the RPM range where the turbo is making usable boost pressure.
Ding ding ding, school is done!
Now go buy an EFR, run ALLOFIT and blow that bugger up!
#30
I have owned 7 cars in different forms, most above 350hp. Built and have helped built over 30 cars in race and street mode. Don't even remember how many I have tuned (over 50).
#32
Yeah no, modern turbos still have lag. There's a perceivable throttle delay even on the best garrett setup I've driven (FM stroker with disco potato). Its nearly inperceivable on my car with the efr, its still there but its at about the same level as some of the more throttle laggy N/A engines. If they made a 2560 sized efr it would be so short it would not be noticeable by human beings.
#36
I think it was rolling into it from coasting around 50mph in 4th.
When i'm actually driving it in the correct gear, there's pretty much no lag that is noticeable by a human. And i still have work to do optimizing it. Like Steve said, it's just on wastegate, and i have a small exhaust leak to take care of, 3" downpipe to go on, and i've been too lazy to get VICS hooked up and working.
I'll probably just chip away at it over the winter at this point. The pile of parts to install is growing.
Steve, you need to check out Keith (Twodoor)'s setup. It's hilariously gutsy in any gear. Because gearing.
When i'm actually driving it in the correct gear, there's pretty much no lag that is noticeable by a human. And i still have work to do optimizing it. Like Steve said, it's just on wastegate, and i have a small exhaust leak to take care of, 3" downpipe to go on, and i've been too lazy to get VICS hooked up and working.
I'll probably just chip away at it over the winter at this point. The pile of parts to install is growing.
Steve, you need to check out Keith (Twodoor)'s setup. It's hilariously gutsy in any gear. Because gearing.