Editing Z31/camspecs (section)

=== VG30E(T) Camshaft Specs ===

Manufacturer, type, duration (Int/Exh), cam lift (in inches), other info.

* Non-turbo grind 256/256 .420"/.420" CLSA 110
* Non-turbo grind 262/262 .420"/.420" CLSA 110
* Non-turbo grind 270/270 .440"/.440" CLSA 110
* Non-turbo grind 280/280 .450"/.450" CLSA 110
* Turbo grind 262/256 .420"/.420" CLSA 114
* Turbo grind 270/262 .440"/.420" CLSA 114
* Turbo grind 280/270 .450"/.440" CLSA 114
* Turbo "race only" grind 284/274 .450"/.440" CLSA 114
* Stage 1 Turbo 262/256 .420"/.420" $169.95 Exchange only
* Stage 2 Turbo 270/262 .420"/.420" $169.95 Exchange only
* Stage 1 Non-Turbo 260/260 .420"/.420" $169.95 Exchange only
* Stage 2 Non-Turbo 270/270 .427"/.427" $169.95 Exchange only
* Stage 3 Non-Turbo 280/280 .435"/.435" $169.95 Exchange only
* Turbo and non 262/258 .450"/.450" About $200 Exchange only
* DSV-5800 Street 280/280 Turbo .328"/.328" $230 Each - $250/Core
* DSV-6200 Strt/Strp 288/288 Turbo and non .360"/.360" $230 Each - $250/Core
* DSV-6800 RACE 302/302 Turbo and non .373"/.373" $230 Each - $250/Core
* Stage 1 Turbo (S1) 260/260 .440" About $450
* Stage 2 Turbo (S2) 266/266 .473" About $450
* Use only the valve springs that will give the correct spring pressure with the valve both on the seat and at maximum lift.
* The outside diameter of the recommended valve spring may require that the spring pocket of the head be machined to a bigger size.
* One of the easiest and sometimes most costly mistakes made in racing engines is not positively locating the spring. A valve spring that "dances" around on the cylinder head or retainer causes harmful harmonics and excessive wear. A spring that is forced onto a retainer is likely to fail at that coil. A spring that is contained properly at the retainer and the cylinder head will offer the longest possible service life.
* Handle springs with care. Never place in a vise, grab with pliers or hit them with a hammer. This will damage the surface of the spring, which will cause a spring to fail.
* When separating double or triple springs, use only a durable plastic object that cannot harm the shot-peened surface of the spring. Never use a tool or hard metal object like a screwdriver.
* Valve springs are shipped with a rust preventative coating that should remain on the spring throughout engine assembly. Do not clean springs with acidic or evaporative cleaners. This causes rapid drying and promotes the formation of rust on the surface, which can cause catastrophic failures. Even a slight amount of corrosion can grow to be a problem.
* When installing springs, use Assembly lube to ease assembly and improve the life of the spring.
[http://www.z31.com/mods/cams.shtml Z31.com]
* Schneider Racing Cams
[http://www.redz31.net/pages/caminfo.html redz31.net]
* Geoff @
[http://www.coltcams.com Colt Cams] [webcamshafts.com]

==== OE cams: ====

Manufacturer |
Duration Intake |
Duration Exhaust |
Cam lift Intake Lobe Inches |
Cam lift Exhaust Lobe Inches |
Intake Centerline |
Exhaust Centerline |
| Stock "early" US 7/83 to 7/87 Z31 | 252 or 193 @ 0.050 | 252 or 193 @ 0.050 | .393" | .393" | 106 | 116 |
| Stock "late" US Z31 08/87+ | 248 or 189 @ 0.050 | 248 or 192 @ 0.050 | .393" | .393" | 114 | 114 |
| J-spec Z31 cams | 252 or 193 @ 50 thousands | 252or 193 @ 0.050 | .393" | .393" | ||
| European Z31 Cams | 264 | 262 | .393" | .393" | ||
| NISMO Z31 Cams | 264 | 262 | .393" | .393" | ||
| USDM VG30 "Truck" cams (D21, WD21 and J30) | 248 or 189 @ 0.050 | 248 or 192 @ 0.050 | .393" | .393" | ||
| USDM VG33 Cams (all) | 240 | 244 | .366" | .366" |

==== Colt Cams: ====

| Manufacturer | Duration Intake | Duration Exhaust | Cam lift Intake Lobe Inches |
Cam lift Exhaust Lobe Inches |
|

* [http://allthingsz.com/store/images/VG30Ecams.png Colt Cam Na (Stage 2)]
* [http://allthingsz.com/store/images/VG30Ecams.png Colt Cam Turbo (Stage 2)]### Schneider Racing Cams:

Inknown Number @ 0.050 Advertised @ 0.006

==== Motorsport Auto: ====

Inknown Number @ 0.050 Advertised @ 0.006

==== Iskendarian Cams: ====

Inknown Number @ 0.050

==== PAECO: ====

Inknown Number @ 0.050

==== Jim Wolf Technology: ====

Inknown Number @ 0.050

==== Other Custom grinds used by Z31 owners: ====

Inknown Number @ 0.050

Tempestas custom turbo grind 270/270 .480"/.480"