Pretty sure he means between using the height offset utility vs physically moving the sensors.
OEM Front Spacer Install for AHC Suspension
- Thread starter TeCKis300
- Start date
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Could you please explain why travel is increased? I think droop is shifted downwards but travel stays the same..
If the 200 is like other toyota trucks, the bump stop is the limiting up travel factor. The actual shock has more travel which comes into play once the spacer is installed. So there's more droop while still keeping the same up travel up to the bump stop. Besides the length of top mount studs, this is another reason why it might be a bad idea to install thicker spacers. The shocks might become the limiting factor and this would be bad.
- Thread starter
- #25
So who's going to be the guinea pig and do what he did to an LX to figure out what the max usable spacer size is. I see now on eBay there is a company selling spacers in 20mm/30mm/40mm sizes. The Toyota spacer covers 10mm, so that gives us options from 10-40mm.
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When bleeding the front, will all of the ahc fluid come out?
- Thread starter
- #28
You'll want to be sure to depressurize the system. Which means to bleed the suspension globes and put the shocks in droop. Some fluid will come out but it won't be too bad.
I’m assuming one should bleed once the vehicle is already jacked up with the front suspension drooping?
Or should I bleed before jacking the car up and allowing it to droop?
So who's going to be the guinea pig and do what he did to an LX to figure out what the max usable spacer size is. I see now on eBay there is a company selling spacers in 20mm/30mm/40mm sizes. The Toyota spacer covers 10mm, so that gives us options from 10-40mm.
Cruiser 200 Front Spacer for sale | eBay
Get the best deals for Cruiser 200 Front Spacer at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!www.ebay.com
I dont do anything but shop and postpone things but i will be doing 20mm with my UCA install. Should correct my sensor lift perfectly.
Theres endless options in UCAs and a broad range of opinions on all of them.
Did you do 1.5” lift? Remember the amount of lift is double the spacer height.
Any notion on how much ahc fluid I should have on hand?
- Thread starter
- #34
It's been awhile. I want to say I had 3qts on hand but didn't use all 3. Went through probably a handful of cycles up and down to try to purge the air out of the system. It'll probably depend on how much fluid you use and how much cycling it takes to purge all the air.
Im maxed out up front, but from trying to understand some of @TeCKis300 comments on the subject with AHC im guessing that this will counterintuitively induce some preload effect on the coil and not give the full 1.5 inches but closer to 1” matching height adjustment i made and that will preserve some rake for me.
Im not sure on this actually and wouldnt mind some clarification, i do know that its not our springs providing lift, so given the sensor is not moving, it should compress the spring a bit by pseudo loading it and make the front end a bit tighter which i dont mind, but still preserving correct damping pressure and adding the necessary lost travel bringing balance back to the coil.
Ive been meaning to ask for some clarification, and havent really thought through it too much.
What do you think LX?
2 things to consider here:
i made my comment because I think the typical sensor lift is around 25mm (maybe it’s more though), adding a 20mm spacer would offset 40mm of lift, Effectively this would be similar to driving a stock truck lowered 15mm on sensors all the time, as it pertains to the balance between shock and spring. The factory 10mm spacer nets a 20 mm offset in lift, effectively shifting the balance to 5mm towards the shocks, I’m sure that is about as clear as mud.
Point 2
the point of my post about someone testing an LX is finding how much room there is to go down before the shock becomes the limiting factor in down travel. 20mm could possibly be too far, and would be bad news.
Ah yeah i see. So if i recall your 25mm figure is around what i got up front, about an inch. A little more in the rear but my memory is fuzzy and i dont have it written down. I can measure tomorrow probably.
What i was poking at was from Teckis comments that on AHC that 20 spacer wont exactly double travel like on an LC. Ill give him a sec to comment and clarify but i can kind of imagine how that could happen. Need to look at it, its been a while.
Regarding where the spring shock balance would theoretically be i have to re read your comment in the morning and have a good look at the drawings. Im thinking it would have the same effect albeit less so. However, i still have full height modes travel including 4 Lo HI+ so im sure there is at least another 2” in shock travel left to have, and since it will never be that height at speed i should be ok. That is, given the dynamic i so poorly tried to understand in my og comment is actually true. How it handles in that stroke range i have no clue, but it should be nice and toight.
Im guessing again, but aside from control arms, i “feel” like the biggest current weakness up front is linear spring actuation and this should help with a much obliged bonus of travel enhancement. Also doesn’t help that im never loaded in the rear.
**** it come to the house well order them and play, best way to learn. If we break it well do insurance fraud.
- Thread starter
- #38
Not sure what the question is?
The front IFS is roughly a 2:1 motion ratio, shock travel to wheel travel. I forget what the stock LC spacer measures. Won't change the ride height on the LX any, other than to pre-load the coil spring better for lift and expand front overall travel from 9" to 10". I do wonder what the limits of the spacer are before the shock becomes the bottoming out limiter, and grenades. I would be conservative here, as the wrong hit will blow through the stock bump stops, into their deformation region, and potentially take out a shock. The want to further increase droop travel is alluring though.
Measurements from this thread showed really strong droop travel. Stock ride height has ~3" compression and ~5.5" droop at the front. So even a more aggressive 2" sensor lift would only put that at 5" compression / 3.5" droop.
The challenge is making high AHC position still useful. A 2" sensor lift would put high at 7" compression travel and 1.5" droop, which in my mind compromises droop travel too much. Which is where the front shock spacer has real value in expanding droop travel by 1". I personally think a 1-1.5" sensor lift is ideal given the balance of concerns.
The front IFS is roughly a 2:1 motion ratio, shock travel to wheel travel. I forget what the stock LC spacer measures. Won't change the ride height on the LX any, other than to pre-load the coil spring better for lift and expand front overall travel from 9" to 10". I do wonder what the limits of the spacer are before the shock becomes the bottoming out limiter, and grenades. I would be conservative here, as the wrong hit will blow through the stock bump stops, into their deformation region, and potentially take out a shock. The want to further increase droop travel is alluring though.
Measurements from this thread showed really strong droop travel. Stock ride height has ~3" compression and ~5.5" droop at the front. So even a more aggressive 2" sensor lift would only put that at 5" compression / 3.5" droop.
The challenge is making high AHC position still useful. A 2" sensor lift would put high at 7" compression travel and 1.5" droop, which in my mind compromises droop travel too much. Which is where the front shock spacer has real value in expanding droop travel by 1". I personally think a 1-1.5" sensor lift is ideal given the balance of concerns.
in step 7, will the strut/shock just slide out the bottom of the coil? Then install spacer and put it back together?
Or is some sort of spring compressor necessary?
The spacer sits on top of the whole assembly. No need to seperate.
