LS1 swap and new member intro
11-27-2010, 11:29 AM
#26
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Am I missing somthing? lol
I am trying to end up with the largest circle I can get. I am limited by rules on tire compound and width. The less the car weighs, the less tire I am allowed to use. I am fairly sure there will be a "sweet spot" that yields the biggest friction circle, but the intent of the rule is to even out the size of all the teams' circles. A bigger circle means you have to generate more force from acceleration in order to slide. To slide you would have to accelerate harder, turn harder, and brake harder.
Only time will tell for sure but I expect to have much higher speeds in steady state drift than I have experienced in my Miata, and that car is always one of the faster ones at events.
I am trying to end up with the largest circle I can get. I am limited by rules on tire compound and width. The less the car weighs, the less tire I am allowed to use. I am fairly sure there will be a "sweet spot" that yields the biggest friction circle, but the intent of the rule is to even out the size of all the teams' circles. A bigger circle means you have to generate more force from acceleration in order to slide. To slide you would have to accelerate harder, turn harder, and brake harder.
Only time will tell for sure but I expect to have much higher speeds in steady state drift than I have experienced in my Miata, and that car is always one of the faster ones at events.
Last edited by APEXMX5; 11-27-2010 at 12:05 PM.
11-27-2010, 07:28 PM
#28
Apex I have had a lot of great luck with impact racing. Bill simpsons new child. He sells some things at half the price you would get the same product from simpson at. There was a hicup a couple months back with some certifcation red tape, but that was all cleared up. I got my out of date safety items replaced through him and price wise it has worked out wonderfully.
11-27-2010, 07:34 PM
#29
I didn't catch the second page of this. You can go to big on a tire size. Remember that traction only works well if you have the weight on the tire. The larger the foot print of the tire the less lbs per sq inch you will get of weight on the foot print of the tire.
Look at NHRA drag racers for instance. They run an extremely wide tire that picks up traction as the centrifical force causes the tire to increase in height making it thinner. While the tires are under no force and at thier widest point they are able to burn out the tires to slightly melt them for more traction. As the centrifical force increases the tires get more narrow and are able to continue to hold traction up through 300mph. While if you look at the front tires they use almost what you would think would be a tire from a old ford model T.
Tires are all application specific and the size you are going to get needs to be determined by the type of events you want to participate in. If it was a daily driver a harder compound would work great for fuel savings and tire life. If its a track only car a softer tire is great for traction but can burn out in 10,000 miles or less.
Look at NHRA drag racers for instance. They run an extremely wide tire that picks up traction as the centrifical force causes the tire to increase in height making it thinner. While the tires are under no force and at thier widest point they are able to burn out the tires to slightly melt them for more traction. As the centrifical force increases the tires get more narrow and are able to continue to hold traction up through 300mph. While if you look at the front tires they use almost what you would think would be a tire from a old ford model T.
Tires are all application specific and the size you are going to get needs to be determined by the type of events you want to participate in. If it was a daily driver a harder compound would work great for fuel savings and tire life. If its a track only car a softer tire is great for traction but can burn out in 10,000 miles or less.
11-27-2010, 08:07 PM
#30
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this is true. a higher friction coefficient can be had with a better compound or by increasing downward force on the surface.
the problem is when the tires are spinning at all times they overheat quickly and grip falls off sharply. It takes more Joules of energy to overheat a wider tire so you can have grip for longer and the tires can handle being roasted harder and faster with out melting as soon as a narrow tire would.
This year FormulaD had 7-800 hp cars that weighed barely over 2000 lbs and they were running positively MASSIVE tires to be able to hold up to wheel-spin speed that fast and roasting that hard without just overheating to liquid and de-laminating
The new tire rule is gonna create interesting strategies!
the problem is when the tires are spinning at all times they overheat quickly and grip falls off sharply. It takes more Joules of energy to overheat a wider tire so you can have grip for longer and the tires can handle being roasted harder and faster with out melting as soon as a narrow tire would.
This year FormulaD had 7-800 hp cars that weighed barely over 2000 lbs and they were running positively MASSIVE tires to be able to hold up to wheel-spin speed that fast and roasting that hard without just overheating to liquid and de-laminating
The new tire rule is gonna create interesting strategies!
11-27-2010, 08:12 PM
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Apex I have had a lot of great luck with impact racing. Bill simpsons new child. He sells some things at half the price you would get the same product from simpson at. There was a hicup a couple months back with some certifcation red tape, but that was all cleared up. I got my out of date safety items replaced through him and price wise it has worked out wonderfully.
11-28-2010, 07:17 PM
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Good luck with build.
I'll be following your progress with much anticipation.
Just to make you aware if you weren't already, Hinson Super Cars (not a sponsor of this site) has been working on an RX8 kit for an LS1 swap. Unfortunately, it looks like it might have stalled considering the lack of updates on their site. You still might want to chat with them...
I'll be following your progress with much anticipation.
Just to make you aware if you weren't already, Hinson Super Cars (not a sponsor of this site) has been working on an RX8 kit for an LS1 swap. Unfortunately, it looks like it might have stalled considering the lack of updates on their site. You still might want to chat with them...
I acctually emailed them about this kit a couple days ago, It is still being tested and pricing should be coming out soon.
11-30-2010, 12:13 AM
#33
It's a Cavalier
Regardless, I'm not in a mode where I want to be one of the first to install this kit. I'd like to see a couple of successful builds before jumping in.
I don't have any plans to race like the OP does, so I'm simply looking for a nice handling V8 powered RX8 street car. I like the fact the OP is building the car to meet a set of specifications... it's definitely an interesting build.
![mike[piston eater]'s Avatar](https://www.rx8club.com/avatars/mike%5Bpiston-eater%5D-48728.gif?dateline=1334247180)
12-04-2010, 11:43 AM
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yeah, in FD the 7-800hp guys arent any faster then the 500hp guys. It seems from around 500-600 hp and up the benefit falls off. You can see the 300-400 hp guys struggling though.
12-08-2010, 10:53 AM
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Not a super interesting update but an update nonetheless.
I have been waiting for the new mount bits to be ready to install on the FB, but I have not been idle. I have been opening wiring harnesses and studying diagrams while doing side research on passkey and Immobilizer systems. All of this between PBRs!
The LS1 doesnt need all that much wiring if you have the complete engine harness. There are 5 or so inline connectors with a few wires each that need to be routed. I have the donor car's body harness so that means I have both male and female sides to these connectors. With the Renesis gone there are some relays and fuses that are now jobless. My plan is to get in to the back of the main fuse box and re-configure some of the wiring while adding a few new fuses to the unused spots. This will let me integrate the LS wires into the RX8 harness/junction box. The engine will plug right in to the harness with two bangs and one booky.
I made a quick n dirty diagram of what goes where and labeled an RX8 fuse box legend with the changes.
I have been waiting for the new mount bits to be ready to install on the FB, but I have not been idle. I have been opening wiring harnesses and studying diagrams while doing side research on passkey and Immobilizer systems. All of this between PBRs!
The LS1 doesnt need all that much wiring if you have the complete engine harness. There are 5 or so inline connectors with a few wires each that need to be routed. I have the donor car's body harness so that means I have both male and female sides to these connectors. With the Renesis gone there are some relays and fuses that are now jobless. My plan is to get in to the back of the main fuse box and re-configure some of the wiring while adding a few new fuses to the unused spots. This will let me integrate the LS wires into the RX8 harness/junction box. The engine will plug right in to the harness with two bangs and one booky.
I made a quick n dirty diagram of what goes where and labeled an RX8 fuse box legend with the changes.
Last edited by APEXMX5; 12-08-2010 at 10:55 AM.
12-12-2010, 12:27 AM
#43
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Today's update,
FB mounts and bracket are done. The engine has been test fit. Tomorrow should be either the tranny mount or a shift of gears to prepping the miata for WSIR next weekend.
pics Mount platforms, Modified RX8 mounts, new driver's side mount bracket
FB mounts and bracket are done. The engine has been test fit. Tomorrow should be either the tranny mount or a shift of gears to prepping the miata for WSIR next weekend.
pics Mount platforms, Modified RX8 mounts, new driver's side mount bracket
12-13-2010, 10:06 AM
#47
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I am not adapting PPF to the FB rear end, I am adapting the FB tranny mount to the 6 speed.
I DO plan on adapting the PPF to the T56 in the RX8 and may also retain the T56's camaro tranny mount as well. I will know more what I am up against when I get this 7 outta here and get the 8 in.
I DO plan on adapting the PPF to the T56 in the RX8 and may also retain the T56's camaro tranny mount as well. I will know more what I am up against when I get this 7 outta here and get the 8 in.