Wanna make your EVO handle even better ?? Battery relocation!
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Originally posted by chronohunter
Alfriedesq, can you still fill your windshield washer fluid?
If you can (when you post the pics) list all the pieces an prices
Alfriedesq, can you still fill your windshield washer fluid?
If you can (when you post the pics) list all the pieces an prices
Pics will come hopefully later tonight on my web page
Re: Wanna make your EVO handle even better ?? Battery relocation!
Originally posted by Alfriedesq
The weight transfer was substantial
The weight transfer was substantial
Originally posted by Alfriedesq
However - my testing tonight showed that the handling gains were DRAMATIC - it handels even more neutral than before
However - my testing tonight showed that the handling gains were DRAMATIC - it handels even more neutral than before
Originally posted by Alfriedesq
a lot more grip
a lot more grip
Originally posted by Alfriedesq
I donty kknow why they dont ship the cars with the batteries in the trunk in the first place
I donty kknow why they dont ship the cars with the batteries in the trunk in the first place
Originally posted by Alfriedesq
BTW - yes it was slightly costly bny the time you add up the cost of all those monster cable battery connectors - 1/0 monster wire and fancy fuze blocks - but - it makes a huge gain in hadnling area - - - the stock was just puts too much wieght up high and too far forward
BTW - yes it was slightly costly bny the time you add up the cost of all those monster cable battery connectors - 1/0 monster wire and fancy fuze blocks - but - it makes a huge gain in hadnling area - - - the stock was just puts too much wieght up high and too far forward
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From: Stamford, CT
Re: Re: Wanna make your EVO handle even better ?? Battery relocation!
Originally posted by WestSideBilly
Do you have any proof of this? Did you corner weigh the car before and after?
Do you have any proof of this? Preferably handling diagrams based on a constant speed steer sweep.
How did moving the battery box alter the physics of the tire/road interaction?
Because it's ridiculously expensive.
Did you consider that, in addition to cost, you've also added quite a bit of weight? You've added 15' of heavy cable, connectors, fuse blocks, and an aluminum battery box. I'd estimate that to be at least 15 lbs. While the change should improve the performance, I question whether the cost and added weight really justify your claims of improved handling.
Do you have any proof of this? Did you corner weigh the car before and after?
Do you have any proof of this? Preferably handling diagrams based on a constant speed steer sweep.
How did moving the battery box alter the physics of the tire/road interaction?
Because it's ridiculously expensive.
Did you consider that, in addition to cost, you've also added quite a bit of weight? You've added 15' of heavy cable, connectors, fuse blocks, and an aluminum battery box. I'd estimate that to be at least 15 lbs. While the change should improve the performance, I question whether the cost and added weight really justify your claims of improved handling.
It would prob be more cost effective to put in a smaller battery - - but I like the idea of having that big stock battery come winter time
yeah the whole thing weighs a lot and costs a lot but - - - now i can re-route my intercooler pipe to make it straigher and shorter - and like i said - it handels better
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Re: Re: Wanna make your EVO handle even better ?? Battery relocation!
Originally posted by WestSideBilly
Do you have any proof of this? Did you corner weigh the car before and after?
Do you have any proof of this? Preferably handling diagrams based on a constant speed steer sweep.
How did moving the battery box alter the physics of the tire/road interaction?
Because it's ridiculously expensive.
Did you consider that, in addition to cost, you've also added quite a bit of weight? You've added 15' of heavy cable, connectors, fuse blocks, and an aluminum battery box. I'd estimate that to be at least 15 lbs. While the change should improve the performance, I question whether the cost and added weight really justify your claims of improved handling.
Do you have any proof of this? Did you corner weigh the car before and after?
Do you have any proof of this? Preferably handling diagrams based on a constant speed steer sweep.
How did moving the battery box alter the physics of the tire/road interaction?
Because it's ridiculously expensive.
Did you consider that, in addition to cost, you've also added quite a bit of weight? You've added 15' of heavy cable, connectors, fuse blocks, and an aluminum battery box. I'd estimate that to be at least 15 lbs. While the change should improve the performance, I question whether the cost and added weight really justify your claims of improved handling.
It isn't expensive to move a battery to the trunk. Just some longer cables....you don't have to spend a fortune on audio specialty ones. I'd say changing the front rear balance from 60/40 to 58/42 (if you care to do the math) in one small move is huge. I can't believe
didn't do it either.Too bad the autox stock rules won't let you do it....now I REALLY wish
had...
Last edited by OnlineAlias; Apr 30, 2003 at 08:38 PM.
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It came to a lot of cash becuase I did it in a very nice way - i used the summit racing polished alum battery box (which is really very great) a monster junction box up front to accept the 1/0 gauge wire and the stock 12 V leads - - two monster batt terminals and a junction in the back for my amps Oh and not to mention the fuse block - all told it was a $450.00 set of parts including the cable
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I think there's little point in moving the battery to the back, unless you want to put a HUGE carbon fiber air intake box there which wouldnt fit with the battery under the hood (like a friend of mine did on his Evo 6). Moving the battery to the back will also move it higher up, which isnt the best of things to do. However, it takes weight away from the front. You mentioned the handling. What is different now? How's the rear grip limit? Does the tail break away more suddenly now? Can you hold drifts longer? Explain, please.
Originally posted by SOF
Isn't the trunk farther away from the center of gravity than the original battery location? You just messed up your car's polar moment of inertia! You sure it doesn't handle worse now?
Isn't the trunk farther away from the center of gravity than the original battery location? You just messed up your car's polar moment of inertia! You sure it doesn't handle worse now?
so if the car weighs 3000 pounds, the front end would be approx. 1800 lbs and the back would be 1200 lbs. now take away approx 45 lbs from the front and add it to the back..that would make the front 1755 and the back 1245 lbs.this would make a 58.5/41.5 weight distribution..i GUESS that would help, but like SOF brought up, the spot in the trunk may be farther away from the center of gravity than under the hood so the weight distribution may be more even..i just felt like doing simple math
Last edited by bobaab; May 1, 2003 at 12:13 AM.
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exactly
Originally posted by Alfriedesq
It came to a lot of cash becuase I did it in a very nice way - i used the summit racing polished alum battery box (which is really very great) a monster junction box up front to accept the 1/0 gauge wire and the stock 12 V leads - - two monster batt terminals and a junction in the back for my amps Oh and not to mention the fuse block - all told it was a $450.00 set of parts including the cable
It came to a lot of cash becuase I did it in a very nice way - i used the summit racing polished alum battery box (which is really very great) a monster junction box up front to accept the 1/0 gauge wire and the stock 12 V leads - - two monster batt terminals and a junction in the back for my amps Oh and not to mention the fuse block - all told it was a $450.00 set of parts including the cable
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The rear is perfectly balanced - - it seems like the whole car is much more resistant to sliding - like the threshold for sliding at all is raised higher - - once it acftualy starts to rotate around in the back I can not feel any difference at all - it seems the same - but then again I have not had that much drifting action as the car has few miles
IF you wanted to - you could mount the battery low down in the spare tire well (but I am using that for a sub box location
PS - I would have prob kept the battery in the front also - or merely added a smaller battery IF I had not been adding a mcIntosh amp in the trunk and needing to run a at least 4 gauge wire from the front to the back for the amp - - if you are installing a power amp then it makes it much less difficult to run a bigger wire and just move the battery
When looking at the improved apperance of the engine compartment - the better handling - and the ability to run a shorter and straighter intercooler pipe - I'm glad I did it
IF you wanted to - you could mount the battery low down in the spare tire well (but I am using that for a sub box location
PS - I would have prob kept the battery in the front also - or merely added a smaller battery IF I had not been adding a mcIntosh amp in the trunk and needing to run a at least 4 gauge wire from the front to the back for the amp - - if you are installing a power amp then it makes it much less difficult to run a bigger wire and just move the battery
When looking at the improved apperance of the engine compartment - the better handling - and the ability to run a shorter and straighter intercooler pipe - I'm glad I did it
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Alfriedesq, will you post pictures today?
How much weight do you estimate you added for the battery relocation cable and other parts?
People can consider doing the battery relocation with a lighter battery at the same time, so that the net weight change may be zero or even negative, while still removing weight from the front wheels and gaining engine compartment space.
For those that are experienced in the rules of autocross and track days, how is stock battery relocation and/or substitution addressed?
How much weight do you estimate you added for the battery relocation cable and other parts?
People can consider doing the battery relocation with a lighter battery at the same time, so that the net weight change may be zero or even negative, while still removing weight from the front wheels and gaining engine compartment space.
For those that are experienced in the rules of autocross and track days, how is stock battery relocation and/or substitution addressed?