Oscarmaier Posted June 29, 2017 Author Report Share Posted June 29, 2017 I decided to start running autocross, this was my first event. I had a blast and beat 10 cars and was 12.6 seconds off the fastest lap that was set by non other then Icehouse in a Datsun named "Hey." My suspension was super soft and was the weak link. The body roll was so bad that tire side wall was rubbing on the fender. How do I add a video to a post? 2 Quote Link to comment
Draker Posted June 29, 2017 Report Share Posted June 29, 2017 Upload to youtube, copy and paste url to video here and it will embed. 1 Quote Link to comment
Oscarmaier Posted June 29, 2017 Author Report Share Posted June 29, 2017 I tried that and it just posted the link that took you to youtube. 1 Quote Link to comment
Lockleaf Posted June 29, 2017 Report Share Posted June 29, 2017 Use "youtube" and "/youtube" inside of [ ] as brackets for the video url 1 Quote Link to comment
Oscarmaier Posted June 29, 2017 Author Report Share Posted June 29, 2017 got it thanks guys. This was my first autocross event.. 2 Quote Link to comment
Oscarmaier Posted June 29, 2017 Author Report Share Posted June 29, 2017 I built some coilovers with ZX struts and a no name weld on coilover kit. After I put them on I found out the spring rate was way too high, did some calculations and figured they are around 600#. I put a set of Monroe rear overload shocks on the car, it raised the rearend by about 2" so I cut some coils out and brought it down 1", still sits too high in the rear. This was before I cut some coils This was my second autocross event with the super stiff front springs. I beat 20 cars and was 7.5 seconds off the fastest lap, I feel that's a pretty good improvement. Quote Link to comment
Oscarmaier Posted June 29, 2017 Author Report Share Posted June 29, 2017 I replaced the front springs with a set of 250# springs, man it drives so much better, I also got tired of not knowing what was going on with the car so I bought some gauges, still need to wire them up and make a plate to set them in the radio hole in the dash. Also picked up a dual contact oil sender so I can run the factory idiot light and the gauge. sorry for the bad picture, left is 250# right is 600# both 7" long 1 Quote Link to comment
Oscarmaier Posted June 29, 2017 Author Report Share Posted June 29, 2017 So this happened a few weeks ago, My 3 year old son decided my rear hatch Datsun emblem needed to be two words. So my wife got me this for Father's Day 3 Quote Link to comment
Stitebunny Posted June 29, 2017 Report Share Posted June 29, 2017 Looking good! Nice progress all around! 1 Quote Link to comment
Oscarmaier Posted September 25, 2017 Author Report Share Posted September 25, 2017 Not much progress made on the car, but I did get a few things done. finally replaced the noisy throw out bearing. added some gauges. Not their final resting place, still need a radio delete gauge plate. Picked up some SU's, these won't go on until I sort out my exhaust. Took the family camping. This was the first time camping in the wagon, poor thing is way under powered for all this weight. Also did a bit of off roading, there is still dust in the interior. 2 Quote Link to comment
Draker Posted September 25, 2017 Report Share Posted September 25, 2017 Going with the dog Quote Link to comment
Oscarmaier Posted September 26, 2017 Author Report Share Posted September 26, 2017 Going with the dog It's the same one that was in the car when I bought it. Eventually I'd like a 280 5 speed, but since this is my daily I'll use what works and focus on fixing/replacing the things that don't. 1 Quote Link to comment
Draker Posted September 26, 2017 Report Share Posted September 26, 2017 It's the same one that was in the car when I bought it. Eventually I'd like a 280 5 speed, but since this is my daily I'll use what works and focus on fixing/replacing the things that don't. Nothing wrong with the dogleg. Don't hammer on it in 5th and it will last you. I've been running that tranny for a while. it's been great! other than the drain plug leaking. 3 Quote Link to comment
DatMo Posted October 5, 2017 Report Share Posted October 5, 2017 I’m interested in your rear setup for your coil overs. You’re running stock leaf springs and that coil set? Quote Link to comment
Lockleaf Posted October 6, 2017 Report Share Posted October 6, 2017 That coil set is simply a set of overload shocks. Monroe sells them. Others likely do to. They come with the coils already on them. 1 Quote Link to comment
Oscarmaier Posted October 6, 2017 Author Report Share Posted October 6, 2017 Correct, I cut some of the coils to get it to sit a bit lower. I'm going to do some math (which I'm not good at) and replace the springs with something shorter and stiffer. Here is a link https://www.oreillyauto.com/detail/monroe-4314/suspension---steering-16778/shocks-struts-16482/shocks-struts-16524/shock-strut-12872/load-adjusting-shk/58568/4464015/1971/nissan/510 Quote Link to comment
Lockleaf Posted October 6, 2017 Report Share Posted October 6, 2017 Do you happen to know the coil diameter on these? Are they a standard 2.5 inch? Quote Link to comment
banzai510(hainz) Posted October 6, 2017 Report Share Posted October 6, 2017 rockauto has a spec look under 510 wagon Monroes hit info Quote Link to comment
hang_510 Posted October 8, 2017 Report Share Posted October 8, 2017 Nothing wrong with the dogleg. Don't hammer on it in 5th and it will last you. I've been running that tranny for a while. it's been great! I've heard so many stories about them being weak...I had a Z trans waiting, in case. Sold it 2 years ago. Its the only thing not rebuilt on the sedan. Had a weak synchro for 2-3 since I've had it. I test the limits regularly. Enjoy it! 2 Quote Link to comment
Oscarmaier Posted October 9, 2017 Author Report Share Posted October 9, 2017 I've heard so many stories about them being weak... I had a Z trans waiting, in case. Sold it 2 years ago. Its the only thing not rebuilt on the sedan. Had a weak synchro for 2-3 since I've had it. I test the limits regularly. Enjoy it! Good thing my engine is under powered then ;) Quote Link to comment
Oscarmaier Posted October 9, 2017 Author Report Share Posted October 9, 2017 Do you happen to know the coil diameter on these? Are they a standard 2.5 inch? I don't know off hand, I need to pull them out and take some measurements. Quote Link to comment
Oscarmaier Posted October 16, 2017 Author Report Share Posted October 16, 2017 Did a quick measurement of of the rear coil springs, they have an inside diameter of 2.36" but I'm pretty sure I can get away with a 2.25" Now I just need to figure out length and spring rate, length should be fairly straight forward. but not really sure how to figure out spring rate, any help would be appreciated. 1 Quote Link to comment
Lockleaf Posted October 16, 2017 Report Share Posted October 16, 2017 You need to know the diameter of the spring "wire" (the actual metal), the number of free coils, spring outer diameter and free standing spring height. https://www.acxesspring.com/compression-spring-rate.html Scroll down a ways, it has the formula and some examples/visual aids. Quote Link to comment
Oscarmaier Posted October 16, 2017 Author Report Share Posted October 16, 2017 You need to know the diameter of the spring "wire" (the actual metal), the number of free coils, spring outer diameter and free standing spring height. https://www.acxesspring.com/compression-spring-rate.html Scroll down a ways, it has the formula and some examples/visual aids. I wasn't clear, I am replacing the springs with a new set, the current springs are too long and too soft plus they are a progressive rate spring so I'm not really sure how to calculate the rate on those. I used that site before to find the spring rate of my first set of front coils, very useful. I'm just not sure what rate I need for the rear. The car is a daily with some autocrossing thrown in for fun. I have stock rear leafs with 2" blocks and I'm just looking to stiffen up the rear a bit without making it too bouncy. Quote Link to comment
Lockleaf Posted October 16, 2017 Report Share Posted October 16, 2017 I didn't realize they were progressive. My thought was if you know whats there it's easier to decide what to replace them with, but yeah progressive makes it harder. Quote Link to comment
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