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SignUp Now!Thanks Mike. I will look into one of those as well. I'm still doing a lot of reading and learning. I thought I knew a bunch about these cars. Turns out I know nothing. HahaA wideband o2 would be worth it as well if you have the extra cash. I used an AEM, it was easy to install, and it really helped me dial in the AFR to get the most out of my car.
Thanks for pointing all of this out. First off I am asking for help to figure out why it is not running the way it should. You want to help but you don't have the time to read what is done, what I have done, or what I am willing to do. I have 275/60-r15 drag radials on it. I have a chip burned for the fuel and boost I can and try to run. When the engine was rebuilt by a shop, not by myself, there was no mention of needing to replace the springs. Plugs are brand new, along with wires and an accel high energy ignition coil. Plugs are all gapped at .030". I am not looking for the car to be a 10 second car. I was hoping at the beginning of my build, years ago, for a high 11 second car but I realize now that is probably not possible with my set up. If you would like to tell me how to check my MAF I would love to make sure that is working like it should. This whole thread started with me asking for help and not looking to be belittled. I have not done anything crazy to the car, so yes I believe the car should have more performance than stock. I understand the 3.73 gears are not popular and the cam is big, but if you had read through the thread you would have seen where I was willing to pull the engine and change the cam if that was what people thought needed to be done. I have no idea what torque converter is in the car because I have not had the chance to take a look. The part of the conversation that you decided to join in on was where people are looking at the numbers I am getting and letting me know where to start with diagnostics. That is why I asked what wideband to get. I have also admitted that I thought I knew more about these cars than I actually do, that is why I am asking for help. So before you go off on putting it in a nutshell (pronto) for me, maybe try looking at where I am and what I am trying to do, and what I am willing to do. I am not some 20 year old kid that expects the world of the car, but it would be nice to have it perform a little better and have better drivability.I didn’t have time to read all the replies but here’s the most likely scenario:
-the car is performing at a level that is less than stock.
-owner expects more performance than stock because the car has “work” done to it when in reality most of what’s done has probably hurt performance
The most probable reasons of lower performance are reduced octane, slow spooling do to exhaust leaks (sometimes internal at the wastegate puck) or wrong torque converter,and the fact it is now 3.73. Additionally the engines valve springs are probably shot or wrong. The MAF sensor could be reading wrong or not to 255gpm causing a fueling problem.
If I were to run this particular car at the drag strip I would expect times around 15 seconds in the quarter mile.
If I wanted to increase this engines performance I’d plan on the following:
1. Fix all pre turbo exhaust leaks and verify torque converter is correct and Remove catalytic converter. If exhaust from cat back is suspect replace it with a free flowing exhaust, open air filter on MAF ( not a Spectre brand!)
2. Verify mass air flow sensor is reading correctly
3. Close plug gaps to .030”
4. Replace valve springs and set to 100-105lbs on the seat
5. Get a set of 275/60-15 drag radials.
6. Use an anti detonant or high octane fuel and have chip burned for it and increase manifold pressure as you specified you’d run when you had the chip burned
If you aren’t going to consider using the 28” tire it’s fairly safe to say the car will run quicker with 3.42 gears.
Sent from my iPhone using Tapatalk
Thanks for pointing all of this out. First off I am asking for help to figure out why it is not running the way it should. You want to help but you don't have the time to read what is done, what I have done, or what I am willing to do. I have 275/60-r15 drag radials on it. I have a chip burned for the fuel and boost I can and try to run. When the engine was rebuilt by a shop, not by myself, there was no mention of needing to replace the springs. Plugs are brand new, along with wires and an accel high energy ignition coil. Plugs are all gapped at .030". I am not looking for the car to be a 10 second car. I was hoping at the beginning of my build, years ago, for a high 11 second car but I realize now that is probably not possible with my set up. If you would like to tell me how to check my MAF I would love to make sure that is working like it should. This whole thread started with me asking for help and not looking to be belittled. I have not done anything crazy to the car, so yes I believe the car should have more performance than stock. I understand the 3.73 gears are not popular and the cam is big, but if you had read through the thread you would have seen where I was willing to pull the engine and change the cam if that was what people thought needed to be done. I have no idea what torque converter is in the car because I have not had the chance to take a look. The part of the conversation that you decided to join in on was where people are looking at the numbers I am getting and letting me know where to start with diagnostics. That is why I asked what wideband to get. I have also admitted that I thought I knew more about these cars than I actually do, that is why I am asking for help. So before you go off on putting it in a nutshell (pronto) for me, maybe try looking at where I am and what I am trying to do, and what I am willing to do. I am not some 20 year old kid that expects the world of the car, but it would be nice to have it perform a little better and have better drivability.I didn’t have time to read all the replies but here’s the most likely scenario:
-the car is performing at a level that is less than stock.
-owner expects more performance than stock because the car has “work” done to it when in reality most of what’s done has probably hurt performance
The most probable reasons of lower performance are reduced octane, slow spooling do to exhaust leaks (sometimes internal at the wastegate puck) or wrong torque converter,and the fact it is now 3.73. Additionally the engines valve springs are probably shot or wrong. The MAF sensor could be reading wrong or not to 255gpm causing a fueling problem.
If I were to run this particular car at the drag strip I would expect times around 15 seconds in the quarter mile.
If I wanted to increase this engines performance I’d plan on the following:
1. Fix all pre turbo exhaust leaks and verify torque converter is correct and Remove catalytic converter. If exhaust from cat back is suspect replace it with a free flowing exhaust, open air filter on MAF ( not a Spectre brand!)
2. Verify mass air flow sensor is reading correctly
3. Close plug gaps to .030”
4. Replace valve springs and set to 100-105lbs on the seat
5. Get a set of 275/60-15 drag radials.
6. Use an anti detonant or high octane fuel and have chip burned for it and increase manifold pressure as you specified you’d run when you had the chip burned
If you aren’t going to consider using the 28” tire it’s fairly safe to say the car will run quicker with 3.42 gears.
Sent from my iPhone using Tapatalk
Thanks for pointing all of this out. First off I am asking for help to figure out why it is not running the way it should. You want to help but you don't have the time to read what is done, what I have done, or what I am willing to do. I have 275/60-r15 drag radials on it. I have a chip burned for the fuel and boost I can and try to run. When the engine was rebuilt by a shop, not by myself, there was no mention of needing to replace the springs. Plugs are brand new, along with wires and an accel high energy ignition coil. Plugs are all gapped at .030". I am not looking for the car to be a 10 second car. I was hoping at the beginning of my build, years ago, for a high 11 second car but I realize now that is probably not possible with my set up. If you would like to tell me how to check my MAF I would love to make sure that is working like it should. This whole thread started with me asking for help and not looking to be belittled. I have not done anything crazy to the car, so yes I believe the car should have more performance than stock. I understand the 3.73 gears are not popular and the cam is big, but if you had read through the thread you would have seen where I was willing to pull the engine and change the cam if that was what people thought needed to be done. I have no idea what torque converter is in the car because I have not had the chance to take a look. The part of the conversation that you decided to join in on was where people are looking at the numbers I am getting and letting me know where to start with diagnostics. That is why I asked what wideband to get. I have also admitted that I thought I knew more about these cars than I actually do, that is why I am asking for help. So before you go off on putting it in a nutshell (pronto) for me, maybe try looking at where I am and what I am trying to do, and what I am willing to do. I am not some 20 year old kid that expects the world of the car, but it would be nice to have it perform a little better and have better drivability.I didn’t have time to read all the replies but here’s the most likely scenario:
-the car is performing at a level that is less than stock.
-owner expects more performance than stock because the car has “work” done to it when in reality most of what’s done has probably hurt performance
The most probable reasons of lower performance are reduced octane, slow spooling do to exhaust leaks (sometimes internal at the wastegate puck) or wrong torque converter,and the fact it is now 3.73. Additionally the engines valve springs are probably shot or wrong. The MAF sensor could be reading wrong or not to 255gpm causing a fueling problem.
If I were to run this particular car at the drag strip I would expect times around 15 seconds in the quarter mile.
If I wanted to increase this engines performance I’d plan on the following:
1. Fix all pre turbo exhaust leaks and verify torque converter is correct and Remove catalytic converter. If exhaust from cat back is suspect replace it with a free flowing exhaust, open air filter on MAF ( not a Spectre brand!)
2. Verify mass air flow sensor is reading correctly
3. Close plug gaps to .030”
4. Replace valve springs and set to 100-105lbs on the seat
5. Get a set of 275/60-15 drag radials.
6. Use an anti detonant or high octane fuel and have chip burned for it and increase manifold pressure as you specified you’d run when you had the chip burned
If you aren’t going to consider using the 28” tire it’s fairly safe to say the car will run quicker with 3.42 gears.
Sent from my iPhone using Tapatalk
You state the engine was rebuild by a professional. If they chose the cam, they should have matched the springs to it and set up the geometry. If they didn't choose the cam then they should have at least tested the springs to see if they spec out for the cam. If you don't know what springs are in there, you need to pull one and get it tested. If the spring is too weak you will make hp.
To check the MAF, see post 11.
You don't want belittling but it seems like you don't want to hear the answers.
Have you thought that just maybe . . He is waiting for answers he likes. I am sure more than a few are thinking: Why bother?. . . .
You don't want belittling but it seems like you don't want to hear the answers.