ITT: Your ideas for increasing torque output
12-20-2011, 03:03 PM
#21
A larger exhaust is not going to give you more lower end torque. There is a reason road racers use smaller exhaust systems than drag racers.
In saying that however, it is possible that the 2.5 inch exhaust is not the ideal set up with your blower. It seems to be with all out N/A applications on the road coarse. Only experimenting will know for sure.
If you have the money to do this, doing the baller mods like electric water pump, evac system, or lighten the load on your valvetrain/powertrain will give you some power and torque across the entire power band. It is not cheap, and it is not going to net you a ton of power. Typically last resort methods when all other options have been exhausted. Just throwing that out there.
Put your car on a diet. That will be like adding power and torque.
In saying that however, it is possible that the 2.5 inch exhaust is not the ideal set up with your blower. It seems to be with all out N/A applications on the road coarse. Only experimenting will know for sure.
If you have the money to do this, doing the baller mods like electric water pump, evac system, or lighten the load on your valvetrain/powertrain will give you some power and torque across the entire power band. It is not cheap, and it is not going to net you a ton of power. Typically last resort methods when all other options have been exhausted. Just throwing that out there.
Put your car on a diet. That will be like adding power and torque.
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12-20-2011, 03:24 PM
#22
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backwards. LSA is the angle distance between peak of exhaust lift and of intake. More LSA = less overlap.
It's a pretty meaningless spec by itself. Overlap, intake closing point, and exhaust opening point are more useful. You can't derive overlap from LSA without knowing the opening and closing profiles. LSA is just easy to measure when you're holding an old-school single-cam engine's cam in your hands, thus the measurement's popularity.
It's a pretty meaningless spec by itself. Overlap, intake closing point, and exhaust opening point are more useful. You can't derive overlap from LSA without knowing the opening and closing profiles. LSA is just easy to measure when you're holding an old-school single-cam engine's cam in your hands, thus the measurement's popularity.
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12-20-2011, 07:29 PM
#27
Perhaps... I still have stock cams however it took a lot of work to find and modify all the shims for the lifters. I don't know if I want to go through that again.
Sav's right... I think I'll just do a few easy things and the car needs a re-tune anyways and leave it be until I build myself a stroked out VVT motor :P..
Sav's right... I think I'll just do a few easy things and the car needs a re-tune anyways and leave it be until I build myself a stroked out VVT motor :P..
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12-21-2011, 06:45 AM
#34
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Aaron, what about finding a set of HLAs and stock cams, taking out your current cams along with the lifters, substituting HLAs, and seeing what it does for low-end power? You don't need solid lifters to do a 6500rpm dyno pull for low-end torque comparisons. If it makes a big difference down low, you can spend the time setting up a solid valvetrain for stock camshafts so it will rev again. If it makes no difference, or an insufficient difference, you can just drop the Maruha cams/lifters back into place and forget about it.
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12-21-2011, 06:47 AM
#35
That's a good idea... I didn't think of that. I should still have my lifters kicking around somewhere in a bag. And I know I have the cams. BTW, not that it really makes a big difference but my cams/lifters aren't maruha :P... they were way to baller for me. I have mazspeed lifters w/ supertech shim and ground cams done locally.
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12-21-2011, 04:49 PM
#39
Wait a minute here. Are you seriously suggesting to install the stock cams in place of your hotter cams?
If you are having a problem with power delivery, it sounds to me like you need a final drive gear change. Get your rpms in the range they need to be before doing something stupid like making less power.
If you are having a problem with power delivery, it sounds to me like you need a final drive gear change. Get your rpms in the range they need to be before doing something stupid like making less power.
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12-21-2011, 04:54 PM
#40
Squeezing the exhaust down gives you more torque at the lower rpms and part throttle. Smaller exhaust is a compromise that pays off on the road coarse, but penalizes the drag racer.
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