Sup w/them 2023 Summer Projects?
Mar 9, 2019, 11:43 PM
#376
Evolved Member
Oh true, my class is weighed without driver. But thinking about car only takes out the variability of driver weight when talking about weight thats possible.
In SM trim I can absolutely get down into the 27xx range. But my min weight is 2900lbs (2.24l), so as I pull weight from up front I have to add it to the back of the car. Right now Ive been carrying extra fuel but Zack had brought up an interesting point about that being a lot of fuel to slosh around.
In SM trim I can absolutely get down into the 27xx range. But my min weight is 2900lbs (2.24l), so as I pull weight from up front I have to add it to the back of the car. Right now Ive been carrying extra fuel but Zack had brought up an interesting point about that being a lot of fuel to slosh around.
Mar 10, 2019, 05:56 AM
#377
Evolving Member
Just to put things in perspective, James Houghton's integra, one of the fastest time attack cars in North America still uses factory rear brakes, 260mm. Our rear brakes are waaay bigger than that, 300mm. Just because it's better doesn't mean it's going to make any noticeable improvements.
I had somebody explain to me that by increasing the rear brake performance in moderation with the front, you actually bring the rear of the car down thus taking load and strain off the front but increase overall performance. Its as if the whole car squats equally rather than just nose dives.
Mar 10, 2019, 08:17 AM
#378
You really can't compare an Integra's braking characteristics to an Evo's as there is the small matter of having a shaft linking the front and rear axles together which in turn decreases the ease of locking the rear up..
I had somebody explain to me that by increasing the rear brake performance in moderation with the front, you actually bring the rear of the car down thus taking load and strain off the front but increase overall performance. Its as if the whole car squats equally rather than just nose dives.
I had somebody explain to me that by increasing the rear brake performance in moderation with the front, you actually bring the rear of the car down thus taking load and strain off the front but increase overall performance. Its as if the whole car squats equally rather than just nose dives.
I don't like understeer, so I see no reason to put larger brakes on the rear. A car can't "squat equally" the nose dive motion you get in braking is from weight transfer, if you reduce that nose dive motion by increasing rear braking all you're doing is reducing the weight transfer. We don't have a lot of weight in the rear of our cars, we don't need big rear brakes.
Mar 10, 2019, 08:48 AM
#379
I had somebody explain to me that by increasing the rear brake performance in moderation with the front, you actually bring the rear of the car down thus taking load and strain off the front but increase overall performance. Its as if the whole car squats equally rather than just nose dives.
. No matter which end brakes, braking in general applies a force at the wheel and a resultant force and moment at the CG. Regardless of how the car dives (which is controlled by the geometry), that moment will cause weight transfer will happen the same because the force at the tires are in the same ground plane. Now you could possibly get rear squat under braking if you had really bad geometry. An old Chevy Nova actually does this when lowered significantly. They look incredibly stupid tho, at the drag strip you'll see them actually rise up in the rear when launching.
Mar 10, 2019, 10:34 AM
#380
EvoM Guru
I would probably not listen to that guys advice anymore . No matter which end brakes, braking in general applies a force at the wheel and a resultant force and moment at the CG. Regardless of how the car dives (which is controlled by the geometry), that moment will cause weight transfer will happen the same because the force at the tires are in the same ground plane. Now you could possibly get rear squat under braking if you had really bad geometry. An old Chevy Nova actually does this when lowered significantly. They look incredibly stupid tho, at the drag strip you'll see them actually rise up in the rear when launching.
. No matter which end brakes, braking in general applies a force at the wheel and a resultant force and moment at the CG. Regardless of how the car dives (which is controlled by the geometry), that moment will cause weight transfer will happen the same because the force at the tires are in the same ground plane. Now you could possibly get rear squat under braking if you had really bad geometry. An old Chevy Nova actually does this when lowered significantly. They look incredibly stupid tho, at the drag strip you'll see them actually rise up in the rear when launching.You dont need alot of rear brake in an evo and u definately dont need to upgrade them to a bigger caliper or disc or anythn
Mar 10, 2019, 03:53 PM
#381
I had somebody explain to me that by increasing the rear brake performance in moderation with the front, you actually bring the rear of the car down thus taking load and strain off the front but increase overall performance. Its as if the whole car squats equally rather than just nose dives.
Mar 10, 2019, 03:57 PM
#382
one thing is that the roll/dive/pitch is just the evidence of weight transfer. if the suspension was theoretically solid or something, then maybe there wouldn't be squat/dive. weight transfer still happens though, you just wouldn't see it in the body
Mar 16, 2019, 10:08 AM
#383
Evolved Member
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Construct (Mar 17, 2019)
Mar 17, 2019, 01:00 PM
#386
If I had to guess, I would say that the stock brake balance is setup on the "safe" side of more front bias as not to have any issues with rear stepping out under braking. We could probably run more rear bias.... I will run manual brake bias so we will see how that works..
Mar 17, 2019, 07:41 PM
#388
EvoM Guru
you could directly swap the rear brakes. if u did calipers, discs, hubs, handbrake etc haha.
Youll find the mounting points are slightly diff on the rear as are the fronts and they wont mount directly to your hub.
Youll find the mounting points are slightly diff on the rear as are the fronts and they wont mount directly to your hub.
Mar 19, 2019, 09:12 AM
#389
Evolved Member
dry sump project going ahead... Pulley is in, it is 190 mm in diameter (to keep pump speed up to 7000 rpm) and looks ridiculous..
I am not happy with the way the lightening holes were done but that is when it is not done on a CNC but on a manual lathe... May have another made later when I see how it works.. (might need to speed up the pump.. who knows..)
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alpinaturbo (Mar 19, 2019)