Spool RB30 - RB34 3.4L Stroker Kit with Custom CP Pistons — RB30 SHOC
Spool RB30 - RB34 3.4L Stroker Kit with Custom CP Pistons — RB30 SHOC
SPOOL RB34 94mm 3.4L Stroker Kit
World's biggest capacity off the shelf RB30 Stroker Kit: RB34 Stroker Crank to Suit Nissan Skyline RB30 and Holden RB30 VL Commodore engines.
CP Pistons available for RB30 (RB26 or RB25 Twin Cam cylinder head conversions) and SOHC cylinder heads. Any bore size or compression ratio available.
Note: The std OEM crank girdle can be used with the RB34 crank setup. The girdle may require minimal clearancing.
RB34 Stroker Kit Includes:
- Spool Billet 4340 full counter weight 94mm Stroker Crankshaft
- Spool H 3/8 ARP-2000 Bolts (ARP L19 Bolts and Custom Age +625 available as an upgrade) or I Beam Forged Connecting Rods with 3/8 ARP L19 Bolts (Custom Age +625 available as an upgrade)
- CP Custom Pistons (rings, pins and locks included)
- 9310 0.200" Gudgeon Pins standard (5mm wall thickness) (0.250" Pins available as an upgrade)
If you're planning to stroke your RB30 you have come to the right place. SPOOL offers the worlds biggest off the shelf RB30 stroker kit. The kit includes a 94mm full counter weight Billet 4340 Nitrited crankshaft with long oil pump drive, I beam connecting rods and CP forged pistons and rings.
As you can see from the table below. The RB34 has a very similar rod/stroke ratio as the Nissan CA18 and Toyota 2JZ both of which love to rev and have been around a long long time.
| Engine | Rod Length(mm) | Stroke(mm) | Rod/Stroke Ratio |
|---|---|---|---|
| SR20 Stroker | 136.3 | 91 | 1.50 |
| 2JZ 3.4 | 142 | 94 | 1.51 |
| CA18 Stroker | 133 | 87.6 | 1.52 |
| LS Stroker | 155.57 | 101.6 | 1.53 |
| BA | 153.92 | 99.31 | 1.55 |
| EL/EF | 149.35 | 96.31 | 1.55 |
| 3RZ | 147 | 95 | 1.55 |
| RB28 | 121.5 | 77.7 | 1.56 |
| SR20 | 136.3 | 86 | 1.58 |
| CA18 | 133 | 83.6 | 1.59 |
| RB34 | 152.5 | 94 | 1.62 |
| 2JZ | 142 | 86 | 1.65 |
| RB26 | 121.5 | 73.7 | 1.65 |
| RB32 | 152.5 | 91 | 1.68 |
| 1JZ | 125.25 | 71.5 | 1.75 |
| RB30 | 152.5 | 85 | 1.79 |
Like all SPOOL cranks, this is a true billet crank machined from forged 4340 bar stock.
All components, crank, connecting rods and pistons are balanced.
With the increased cubic capacity from the 94mm stroker crank, increases of up to 50% in torque and low to mid range power are achievable. Boost will come on earlier in the rev range and peak power will increase.
CP pistons come with rings, pins and lock. The gudgeon pins are upgraded to 9310 hardened alloy steel with 5mm wall thickness.
We have customers making over 1000 hp with our billet crankshafts
Note: Clearancing of the cylinder block is sometimes required.
Selected build specification
- Engine Block / Head: RB30 SHOC
Available options
- Piston Diameter: STD (Special Order); +0.5mm; +1mm
- Pin Upgrade: No Upgrade; 9310 .250"; 300M .250"
- Conrods: Spool H-Beam Conrod ARP2000 3/8 Bolt; Spool H-Beam Conrod ARP L19 3/8 Bolt; Spool H-Beam Conrod ARP CA625 3/8 Bolt; Spool I-Beam Conrod ARP2000 3/8 bolts; Spool I-Beam Conrod ARPL19 3/8 bolts; Spool I-Beam Conrod ARP CA625 3/8 bolts
Engine build fitment
RB30DET (DOHC)|RB30ET (SOHC)|RB34 Stroker. Match the selected dimensions, engine generation and rotating assembly specification before machining or assembly.
Installation and BBT workshop support
Confirm block and head configuration, finished bore size, bearing clearances, compression ratio and crank trigger compatibility. Block clearancing and rotating assembly balancing may be required.
Built by Boost & Tune is an authorised Spool Imports dealer and can assist with component selection, engine assembly and tuning requirements for your build.