yetchh Posted March 1, 2020 Share Posted March 1, 2020 Hi, In my 121 I have about 60mm of travel to the bumpstops which are cut down to about 15mm. Whenever I go over a reasonable bump it bottoms out with a bit of a bang, I should do something about it but what would be better, a higher spring rate or a stiffer shock? Cheers.. Quote Link to comment Share on other sites More sharing options...
cletus Posted March 1, 2020 Share Posted March 1, 2020 First thing to do is make sure the bump stop is the thing that limits the travel If you are getting a sharp bang /knock make sure it's not the shock bottoming out or the spring coils binding, diff hitting the floor, or something like that 7 Quote Link to comment Share on other sites More sharing options...
yetchh Posted March 1, 2020 Author Share Posted March 1, 2020 Good point, the bumpstops are pretty thin, and I can definitely see where the diff has been hitting them but I'll check the other stuff like you said. Quote Link to comment Share on other sites More sharing options...
cletus Posted March 1, 2020 Share Posted March 1, 2020 If it's not a binding problem I'd do springs and shocks to fix it Springs to stiffen the suspension and carry the weight , and shocks to control the higher rate spring Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted March 1, 2020 Share Posted March 1, 2020 If they sold them in the USA, you wont beat rockauto for new shocks. Quote Link to comment Share on other sites More sharing options...
Spencer Posted March 1, 2020 Share Posted March 1, 2020 Yup but for old shit the rockauto shocks (munroe or gab etc) are valved like factory, so very soft and basically useless unless you riding all stock IMO. 1 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted March 1, 2020 Share Posted March 1, 2020 My ute had about 6 different options. Including heavy duty ones. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted March 1, 2020 Share Posted March 1, 2020 Kyb's. I wouldn't cross the road to piss on monroe or gabriel Quote Link to comment Share on other sites More sharing options...
M.H. Posted March 1, 2020 Share Posted March 1, 2020 I got hd ranchos cheap from rock auto for my ute and am very happy with them 1 Quote Link to comment Share on other sites More sharing options...
Truenotch Posted March 2, 2020 Share Posted March 2, 2020 Are your bump stops built into the body or are they on the shock shaft? Going to a good, progressive, poly-foam bump stop makes a world of difference rather than a chopped up piece of rubber. 1 Quote Link to comment Share on other sites More sharing options...
Bling Posted March 2, 2020 Share Posted March 2, 2020 15mm left is barely a piece of rubber lol. To keep that height though and not bottom out it's stiffer springs for sure. If going the cert road too for turbo, you'll want to do a bit of homework on what to put in it. Droop, compression and bumpstop requirements, it's a Rubriks cube. Where does one source bumpstops, is there a good place in NZ? Quote Link to comment Share on other sites More sharing options...
Truenotch Posted March 2, 2020 Share Posted March 2, 2020 In most cars, bump stops do a lot more than just limit the travel at full compression. Most cars corner on the bump stops and they're a great way to create rising rate suspension if done right. 15mm isn't enough to create a smooth transition between the spring rate and the end of the travel, so it would be best to look for better options there. I buy my special bump stops from a store in the USA for the MX5's etc, but they only work for on-shaft applications. There might be a few good PU foam options to bolt to the body, but it'll take some searching to find the right thing (totally worth it IMO). Shocks and springs will also help a lot. What are the current springs in the car? 2 Quote Link to comment Share on other sites More sharing options...
yetchh Posted March 2, 2020 Author Share Posted March 2, 2020 Bumpstops are cut down factories.. Cut down.. It pretty much sat on the bumpstops when it was first lowered.. There isn't a alit of room in the back of a 121 for lowering, fuck knows how they get them low in Japan.. Notched I guess. Springs are customs from Chamberlain's, shocks are from a hilux 1 Quote Link to comment Share on other sites More sharing options...
yetchh Posted March 2, 2020 Author Share Posted March 2, 2020 This gives you an idea of the space, that's the factory stop with the lowered spring on axle stands.. 1 Quote Link to comment Share on other sites More sharing options...
cletus Posted March 2, 2020 Share Posted March 2, 2020 Does it sag much when you put people in the back? Quote Link to comment Share on other sites More sharing options...
yetchh Posted March 2, 2020 Author Share Posted March 2, 2020 I'm not sure, could really only put one one the back as it scraped more due to the panhard rod pushing the diff to one side, that's cured now. My guess is really the springs are a little soft. It rides pretty nice in the back until you hit a biggish bump.. Its definitely not hard Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted March 2, 2020 Share Posted March 2, 2020 Maybe try find some progressive springs? Quote Link to comment Share on other sites More sharing options...
Truenotch Posted March 2, 2020 Share Posted March 2, 2020 Hilux shocks might not be helping either. If you have too much rebound control or if your shock is too short, it won’t allow the suspension to droop properly when you go over bumps and recesses. Droop travel is at least as important as bump travel. Is the axle stand under the diff or the body in the above pic? Quote Link to comment Share on other sites More sharing options...
yetchh Posted March 2, 2020 Author Share Posted March 2, 2020 On axle stands.. Hilux ones were just the ones that were short enough to hold the springs captive.. Edit* could it be maybe that the hilux shocks are too hard and that's causing the banging a opposed to hitting the stops.... hmmm 2 Quote Link to comment Share on other sites More sharing options...
Spencer Posted March 2, 2020 Share Posted March 2, 2020 Dude the hilux shocks always seem good on paper as they are short and have the right ends for heaps of applications. But every-single-time they ride like shit, they are valved for real high truck spring rates so behave like concrete shocks on normal cars. Think there was recently a GX60 guy on here who had hilux shocks, bounced down the road doing fuck all suspension things until he changed them, I tried them back in the day and they are toilet. 4 Quote Link to comment Share on other sites More sharing options...
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