![[Datsun 1200 encyclopedia]](/wiki/upload/wiki.png)
| Revision as of 23:09, 23 December 2014 ddgonzal (Talk | contribs) (->Overview) <- Previous diff |
Current revision ddgonzal (Talk | contribs) (->Pinion Angle) |
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| - | Blocks may be used for lowering leaf-spring cars like the Datsun 1200. This is the traditional easy, time-tested and inexpensive method. See [[Lowering]] for different methods. | + | Blocks may be used for lowering leaf-spring cars like the Datsun 1200. This is the traditional easy, time-tested and inexpensive method for lowering the rear. See [[Lowering]] for other methods. |
| = Overview = | = Overview = | ||
| Datsun 1200 use a straight axle mounted on top of the leaf springs, so by fitting blocks between it and the spring, the rear of the car is lowered. | Datsun 1200 use a straight axle mounted on top of the leaf springs, so by fitting blocks between it and the spring, the rear of the car is lowered. | ||
| - | [http://datsun1200.com/uploads/newbb/12278_4f0a8f3c8a540.jpg Lowering] | + | {{Upload|12278_4f0a8f3c8a540.jpg}} |
| - | <br><img size=400>http://datsun1200.com/uploads/newbb/12278_4f0a8f3c8a540.jpg</img> | + | |
| + | 3.5" lowered, combination of reset springs (2") and 1.5" lowering blocks (see [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=83247#forumpost83247 post]) | ||
| + | <br>{{Album|4738}} | ||
| Block are available in different heights such a 1.5", 2" , 3" for differing amounts of lowering. | Block are available in different heights such a 1.5", 2" , 3" for differing amounts of lowering. | ||
| - | [http://datsun1200.com/uploads/newbb/10308_4a8d15d59eaed.jpg http://datsun1200.com/uploads/newbb/10308_4a8d15d59eaed.jpg] | + | Buy a 1200-specific block, or a "universal" 2.0 inch wide block. "Kits" come with block and U-bolts, so make sure the u-bolt fits a 1200 (M10 bolts, ute needs wider u-bolts than sedan/coupe/wagon). Ute may use 66mm internal width u-bolts (approx. 2.6"). |
| + | |||
| + | Width: 2.0" (narrower 46mm may be used) | ||
| + | Height: whatever you want | ||
| + | Pin: 12.75 mm | ||
| + | Hole: 12.75 mm | ||
| + | U-bolts: M10 diameter (approx. 3/8" -- will the common but larger 7/16" work?) | ||
| + | * M10 x ?2-1/4" ??? (1200 sedan/coupe + 1974 B210) | ||
| + | * M10 x 2.5"??? or 2.6"??? (1200 ute) | ||
| + | |||
| + | Larger Datsuns use 2.5" wide blocks, so they will not fit the 1200. B10/B110/B210 all use 2.0" wide leaf springs, although the block specifications vary. | ||
| + | |||
| + | Sources: | ||
| + | [[Bprojects]] | ||
| + | [[South Yokohama]] | ||
| + | [http://dellowconversions.com.au/product/datsun-1000-1500-lowering-blocks-2-2/ Dellow] | ||
| + | [http://www.lovellsauto.com.au Lovells] 50mm LBNIS5065 1000/1200/120Y | ||
| + | Lovells 75mm LBNIS7565 | ||
| + | Universal: | ||
| + | * JC Whitney | ||
| + | * any race shop such as | ||
| + | * Jegs | ||
| + | * Summit | ||
| + | |||
| + | U-bolts | ||
| + | * local truck spring shop custom made (about $40 per set of 4 in USA) | ||
| + | |||
| + | [http://www.datsun1200.asia/category/select/cid/422 Bprojects] sells long u-bolts which can be used with blocks or without blocks (cut to fit length needed). | ||
| + | |||
| + | {{UploadPost|10308_4a8d15d59eaed.jpg|271876}} | ||
| - | <img size=400>http://datsun1200.com/uploads/newbb/3284_4a1de80c261c0.jpg</img> [http://datsun1200.com/uploads/newbb/3284_4a1de80c261c0.jpg Slight lowering by using B210 isoclamp] | + | Using B210 isoclamp might lower your car 1/4" but results in quieter ride |
| + | <br>{{Upload|3284_4a1de80c261c0.jpg}} | ||
| NOTE: As with any lowering, the suspension travel becomes restricted compared to the factory ride height. | NOTE: As with any lowering, the suspension travel becomes restricted compared to the factory ride height. | ||
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=9160 http://datsun1200.com/uploads/thumbs/9160.jpg] | + | {{Album|9160}} |
| Plain block with screw in pins | Plain block with screw in pins | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=24961 http://datsun1200.com/uploads/thumbs/24961.jpg] | + | <br>{{Album|24961}} |
| custom-made blocks | custom-made blocks | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=10816 http://datsun1200.com/uploads/thumbs/10816.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=10823 http://datsun1200.com/uploads/thumbs/10823.jpg] | + | <br>{{Album|10816}} {{Album|10823}} |
| Modular blocks, stackable 7mm | Modular blocks, stackable 7mm | ||
| - | <br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/7mm_downblocks.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_7mm_downblocks.jpg] [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/7mm_downblocks.jpg_ http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_7mm_downblocks_.jpg] | + | <br>{{Photo|7mm_downblocks.jpg}} {{Photo|7mm_downblocks_.jpg}} |
| + | |||
| + | {{UploadPost|1333_56ea5571ed35b.jpg|477322}} | ||
| + | |||
| + | SCCA racer | ||
| + | <br>{{PhotoPost|IMG_2982.jpg|157716|wiki}} | ||
| + | |||
| + | {{YouTube|lkVcQZwD4Ys}} | ||
| + | |||
| + | = Legality = | ||
| + | See discussion: [{{Post|306490}} Lowering blocks...... Legal???] | ||
| + | * NSW Yes | ||
| + | * VIC Yes | ||
| + | * SA Yes | ||
| + | * QLD Yes | ||
| + | |||
| + | In Australia, the main requirements are: | ||
| + | * keep a minimum of 100 mm ground clearance | ||
| + | * keep 2/3 of original travel (so no lowering onto the bump stops) | ||
| + | * Lowering blocks must be steel or aluminium (not wood or cast iron) | ||
| = Dimensions = | = Dimensions = | ||
| - | <img size=400>http://datsun1200.com/uploads/newbb/10308_4a8d1837b06f4.jpg</img> [http://datsun1200.com/uploads/newbb/10308_4a8d1837b06f4.jpg click] | + | {{UploadPost|10308_4a8d1837b06f4.jpg|271876}} |
| - | [http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/lowering_block.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/th_lowering_block.jpg] <img size=240>http://datsun1200.com/uploads/newbb/5631_4afaa8686e058.jpg</img> | ||
| - | [http://datsun1200.com/uploads/newbb/5631_4afaa8686e058.jpg Dimensions] | ||
| width: 50mm | width: 50mm | ||
| a: 12mm | a: 12mm | ||
| Line 37: | Line 86: | ||
| d: 8mm | d: 8mm | ||
| e: 13mm | e: 13mm | ||
| - | + | {{Upload|5631_4afaa8686e058.jpg}} {{Photo-|lowering_block.jpg|sightings/forum}} {{Photo!|lowering-block-1.jpg|Datsun%201200/Parts}} {{Photo!|lowering-block-2.jpg|Datsun%201200/Parts}} | |
| - | http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Parts/lowering-block-2.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Parts/lowering-block-1.jpg | + | |
| Ute needs wider bolts for larger axle housing | Ute needs wider bolts for larger axle housing | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=24959 http://datsun1200.com/uploads/thumbs/24959.jpg] | + | <br>{{Album|24959}} |
| + | 50mm wide | ||
| + | <br>{{PhotoPost|block.jpg|358947}} | ||
| + | |||
| + | = Datsun 1000 = | ||
| Datsun 1000 dimensions | Datsun 1000 dimensions | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=20248 http://datsun1200.com/uploads/thumbs/20248.jpg] | + | 50mm wide (same as 1200) |
| + | locating nubbins: 1"/25mm (1200 uses small 1/2" nubbins) | ||
| + | {{Album-|20248}} | ||
| + | <br>Regular Datsun blocks [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=358965#forumpost358965 can be used on 1000] by creating a larger sleeve to fit the locator on top and boring out underneath. | ||
| + | |||
| + | = Truck Lowering Blocks = | ||
| + | Sunny Truck/ute lowering blocks are the same as coupe/sedan/wagon but the u-bolts are a wider U — to go around the larger axle housing. | ||
| + | |||
| + | {{Album|9066}} | ||
| + | |||
| + | Moon lowering blocks in 1", 2", 3" sizes - buy at [http://www.datsun1200.asia/category/select/pid/9274 Bprojects] | ||
| + | |||
| + | 2" Moon DST 9067TB | ||
| + | Width: 45mm | ||
| + | Length: 120mm | ||
| + | Height: 50mm/2" | ||
| + | Pin Size: 12mm | ||
| + | |||
| + | U-bolts Stainless Steel | ||
| + | Internal width: 66mm | ||
| + | Length: 245mm | ||
| + | |||
| + | {{Photo2|DST9067TBa.jpg}} {{Photo2|DST9067TBc.jpg}} {{Photo2|DST9067TBd.jpg}} {{Photo2|DST9067TBd.jpg}} {{Photo2|DST9067TBf.jpg}} {{Photo2|DST9067TBh.jpg}} | ||
| = Suspension Travel = | = Suspension Travel = | ||
| Line 52: | Line 126: | ||
| = Pinion Angle = | = Pinion Angle = | ||
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=23850 Correct and Incorrect Angles] | + | Correct and Incorrect Angles |
| - | <br><img size=400>http://datsun1200.com/uploads/photos/23850.jpg</img> | + | <br>{{Album|23850}} |
| From top to bottom: | From top to bottom: | ||
| OK | OK | ||
| Line 65: | Line 139: | ||
| 6 only gearbox angled | 6 only gearbox angled | ||
| - | NOTE that lowering the car ''does not change the alignment angle''. Although the driveshaft angle changes, the pinion-to-transmission angle does not change. Hence, no angle blocks are necessary. | + | NOTE that lowering the car properly ''will not change the alignment angle''. Although the driveshaft angle changes, the pinion-to-transmission angle does not change. Hence, no angle blocks are necessary. Howerver, if you choose to use angle-blocks then the transmission must also be angled the same amount. |
| - | [http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/pinion.png stock alignment angle] (black lines) | + | stock alignment angle (black lines) |
| - | <br><img size=400>http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/pinion.png</img> | + | <br>{{Photo|pinion.png|sightings/forum}} |
| - | [http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/pinion_lowered.png lowered - alignment angle does not change] | + | lowered - alignment angle does not change |
| - | <br><img size=400>http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/pinion_lowered.png</img> | + | <br>{{Photo|pinion_lowered.png|sightings/forum}} |
| Even if the lowering is done unevenly, the important angles do not change. | Even if the lowering is done unevenly, the important angles do not change. | ||
| - | [http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/pinion_uneven.jpg lowered unevenly] - alignment angle does not change | + | |
| - | <br><img size=400>http://i297.photobucket.com/albums/mm219/ddgonzal/sightings/forum/pinion_uneven.jpg</img> | + | lowered unevenly - alignment angle does not change |
| + | <br>{{Photo|pinion_uneven.jpg|sightings/forum}} | ||
| + | |||
| + | {{UploadPost|16236_5da63e0055b16.jpg|492876}} | ||
| = Notes = | = Notes = | ||
| - | * Lowering blocks are legal in most countries, including most Australian states | + | * Lowering blocks are legal in most countries, including most Australian states (where usually 100 mm of ground clearance is required) |
| + | * New Zealand reportedly allows max of 50mm lowering blocks | ||
| * Square blocks will lift the diff squarely and will not change pinion angle | * Square blocks will lift the diff squarely and will not change pinion angle | ||
| * Angle-ground blocks will change pinion angle so are NOT recommended. These are normally used with extreme lowering and require the diff angle to be modified or the transmission angle modified | * Angle-ground blocks will change pinion angle so are NOT recommended. These are normally used with extreme lowering and require the diff angle to be modified or the transmission angle modified | ||
| Line 85: | Line 163: | ||
| ローダウン リーフ　ブロック | ローダウン リーフ　ブロック | ||
| + | |||
| + | = Limits = | ||
| + | 2mm suspension travel left. The bump stops can be cut about 1" to increase the travel, but after that the shock will bottom out (see [[Shocks#Coupe.2FUte.2FWagon|Lowering Shocks]]). | ||
| + | <br>{{Album|11171}} | ||
| + | |||
| + | The limit for lowering, using any means is when the axle is against the chassis rail. To get the car lower than this, you can use 1) smaller diameter [[tires]] or 2) modify the chassis (tubbed, etc). In this photo the bump stop has already been shortened. | ||
| + | <br>{{Album|15983}} | ||
| + | |||
| + | Lowering tires (lowers 1.5" from stock) | ||
| + | <br>{{Album|13446}} | ||
| [[Category:Suspension Modifications]] | [[Category:Suspension Modifications]] | ||
| - | [[Category:Lowering]] | + | [[Category:Lowering]]{{End}} |
Current revision
Blocks may be used for lowering leaf-spring cars like the Datsun 1200. This is the traditional easy, time-tested and inexpensive method for lowering the rear. See Lowering for other methods.
Contents |
[edit]
Overview
Datsun 1200 use a straight axle mounted on top of the leaf springs, so by fitting blocks between it and the spring, the rear of the car is lowered.
3.5" lowered, combination of reset springs (2") and 1.5" lowering blocks (see post)
Block are available in different heights such a 1.5", 2" , 3" for differing amounts of lowering.
Buy a 1200-specific block, or a "universal" 2.0 inch wide block. "Kits" come with block and U-bolts, so make sure the u-bolt fits a 1200 (M10 bolts, ute needs wider u-bolts than sedan/coupe/wagon). Ute may use 66mm internal width u-bolts (approx. 2.6").
Width: 2.0" (narrower 46mm may be used) Height: whatever you want Pin: 12.75 mm Hole: 12.75 mm U-bolts: M10 diameter (approx. 3/8" -- will the common but larger 7/16" work?) * M10 x ?2-1/4" ??? (1200 sedan/coupe + 1974 B210) * M10 x 2.5"??? or 2.6"??? (1200 ute)
Larger Datsuns use 2.5" wide blocks, so they will not fit the 1200. B10/B110/B210 all use 2.0" wide leaf springs, although the block specifications vary.
Sources:
Bprojects South Yokohama Dellow Lovells 50mm LBNIS5065 1000/1200/120Y Lovells 75mm LBNIS7565 Universal: * JC Whitney * any race shop such as * Jegs * Summit
U-bolts * local truck spring shop custom made (about $40 per set of 4 in USA)
Bprojects sells long u-bolts which can be used with blocks or without blocks (cut to fit length needed).
Using B210 isoclamp might lower your car 1/4" but results in quieter ride
NOTE: As with any lowering, the suspension travel becomes restricted compared to the factory ride height.
Plain block with screw in pins
custom-made blocks
Modular blocks, stackable 7mm
SCCA racer
[edit]
Legality
See discussion: POST Lowering blocks...... Legal??? * NSW Yes * VIC Yes * SA Yes * QLD Yes
In Australia, the main requirements are:
- keep a minimum of 100 mm ground clearance
- keep 2/3 of original travel (so no lowering onto the bump stops)
- Lowering blocks must be steel or aluminium (not wood or cast iron)
[edit]
Dimensions
width: 50mm a: 12mm b: ~15mm c: 110mm d: 8mm e: 13mm
Ute needs wider bolts for larger axle housing
50mm wide
[edit]
Datsun 1000
Datsun 1000 dimensions
50mm wide (same as 1200) locating nubbins: 1"/25mm (1200 uses small 1/2" nubbins)
Regular Datsun blocks can be used on 1000 by creating a larger sleeve to fit the locator on top and boring out underneath.
[edit]
Truck Lowering Blocks
Sunny Truck/ute lowering blocks are the same as coupe/sedan/wagon but the u-bolts are a wider U — to go around the larger axle housing.
Moon lowering blocks in 1", 2", 3" sizes - buy at Bprojects
2" Moon DST 9067TB Width: 45mm Length: 120mm Height: 50mm/2" Pin Size: 12mm
U-bolts Stainless Steel Internal width: 66mm Length: 245mm
[edit]
Suspension Travel
- Trim the bump stop rubber by 1" to gain more travel
- Fit more compressible shocks
- Stiffen the effective spring constant to make bottoming out less likely, e.g. add leafs or add an overtravel leaf from a ute
[edit]
Pinion Angle
Correct and Incorrect Angles
From top to bottom: OK 1 stock 2 lowered with straight blocks 3 angled diff. Transmission must be angled to match 4 lowered with angled blocks NOTE: transmission must be angled to match NOT OK 5 only diff angled 6 only gearbox angled
NOTE that lowering the car properly will not change the alignment angle. Although the driveshaft angle changes, the pinion-to-transmission angle does not change. Hence, no angle blocks are necessary. Howerver, if you choose to use angle-blocks then the transmission must also be angled the same amount.
stock alignment angle (black lines)
lowered - alignment angle does not change
Even if the lowering is done unevenly, the important angles do not change.
lowered unevenly - alignment angle does not change
[edit]
Notes
- Lowering blocks are legal in most countries, including most Australian states (where usually 100 mm of ground clearance is required)
- New Zealand reportedly allows max of 50mm lowering blocks
- Square blocks will lift the diff squarely and will not change pinion angle
- Angle-ground blocks will change pinion angle so are NOT recommended. These are normally used with extreme lowering and require the diff angle to be modified or the transmission angle modified
- Handbrake cable will need to be re-adjusted after lowering
- On a BW68-equipped sedan, the blocks make for less access to the brake adjuster and brake bleeder. This is because the BW axle has in bottom-mounted brake cylinders
ローダウン リーフ ブロック
[edit]
Limits
2mm suspension travel left. The bump stops can be cut about 1" to increase the travel, but after that the shock will bottom out (see Lowering Shocks).
The limit for lowering, using any means is when the axle is against the chassis rail. To get the car lower than this, you can use 1) smaller diameter tires or 2) modify the chassis (tubbed, etc). In this photo the bump stop has already been shortened.
Lowering tires (lowers 1.5" from stock)
¤