I've got mostly stock 87 GN and love it. The only thing that drives me crazy is the turbo lag and the fact that so many people talk about burning the tires off when it hits second. In the past my dad had a couple gn's that would do just that. What needs to be done to get faster spool up and fix that slight delay on takeoff. I might not be too clear in this but I hope someone has an idea about what I'm referring to.
How do you fix turbo lag?
- Thread starter kels87gn
- Start date
Beautiful looking car. Is your tune too rich down low? You can make a lot of adjustments with the TT chip.
Check for vacuum leaks exhaust leaks,fuel in first gear, do all that also you could add a rjc manual boost controller to help spoolup. Its like $55 cheap. How much boost do you get when you boost brake it? Maybe the converter might have been changed before you got it and is not the right stall for the stock turbo.. It should stall around 2000/2200 if it stock
That right there is some good advise^^^^^^^
Possible clogged/broken catalytic converter, and pre turbo exhaust leaks. Be sure the factory wastegate hoses are properly connected. Do not use any aftermarket type boost controllers to attempt to increase spoolup. The factory setup works very well for a stock car and is much safer.
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With what you have and if everything is working correctly in stock configuration .. it should have NO LAG and practically burn the tires at will....
just like what was mentioned above .. check all the vacuum lines.. check preturbo leaks.. check for proper orientation on the wastegate lines .. I also suggest the stock wastegate lines ( with the restrictor still in place .. the CORRECT ONE ! ) and a proper tune the car should be very responsive.
I'll check for leaks and lean conditions. I'd like to find someone trustworthy in Atlanta Ga area to help with some of the work. Maybe a little more knowledgeable. I've added TT chip,Hotwire kit,adj fpr,test pipe,tin man cai,suspension upgrades and an RJC boost controller. Oh yeah a scan master,boost and temp gauge. Long term goal is injectors and Alky kit possibly and then leave it alone but I've got to have something adjusted for sure. I'm handy but not as knowledgeable as most guys with these cars. Im cautious with it since no one local to work on it if I break it.
- Joined
- May 28, 2001
Wastegate opening too soon, sticking?
Scanmaster...Post the readings.
What part of Atlanta?
Scanmaster...Post the readings.
What part of Atlanta?
corsair231
Well-Known Member
- Joined
- Jul 8, 2005
Are you just flooring it from idle? Is it a positive traction rear? Basically when stock, even if everything else is right, boost will not start to build until around 2,000 rpm. If leaving from an idle the car is already moving before boost can build enough to break traction. If the car has an open rear then it only has to make enough power to overcome traction on the one wheel. If a posi then it has to overcome traction on both wheels making it harder to spin.
Loading the converter will make a world of difference. Hold the brake with your left foot, give it a little gas with the right, it doesn't take much, just enough that the car tries to pull good against the brake. Release the brake and floor the gas at the same time and enjoy the smoke. If the car does not hit second as hard as it should the TV cable could need adjusting but you need to take it to someone who knows what he is doing. A click or two tighter and it may break 'em loose on the shift but too tight and you won't get WOT and it may cause trans damage..
Loading the converter will make a world of difference. Hold the brake with your left foot, give it a little gas with the right, it doesn't take much, just enough that the car tries to pull good against the brake. Release the brake and floor the gas at the same time and enjoy the smoke. If the car does not hit second as hard as it should the TV cable could need adjusting but you need to take it to someone who knows what he is doing. A click or two tighter and it may break 'em loose on the shift but too tight and you won't get WOT and it may cause trans damage..
benoitthegr8
Sociopathic TR Ownership
- Joined
- Mar 21, 2004
Just get some ball bearings and use "No Lag" fuel additive... 
626gn
Well-Known Member
- Joined
- Feb 15, 2009
Sorry for going off topic, but to clarify even with an open rear both tires will bite if both have equal traction. If you can maintain equal traction to both tires an open rear will hook like a posi.
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Mike Licht
I was here first
- Joined
- May 23, 2001
Nitrous will fix lag
No doubt about, these cars are really cool, freak of nature. However just speaking for me, I don't give a rats ass about what it's worth. My car is coming up on 13k miles. Three years ago took a bone stock car and spent 25k on it. Now it's cooler. Do what you want to your car, the future will take care of itself
- Joined
- Jan 18, 2011
Just trying to give a little future insight....years ago I took a $20k car put 25k into it and whats it worth=20k....so I agree to each his own but I didn't have anyone to tell me back then..
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