Saturday, 27th July 2024, what a long day, but totally worth it. I had to drop the R34 GTR at The Exhibition Centre in Liverpool for The Ultimate Show, then my mate Big Paul (ironic name) came to collect me and take me down to Nottingham to collect the Supra. We arranged a collection time of 4pm, and then I head south to Watford Gap to meet an old friend for a coffee and give the car a run before heading home for 10pm. 220 miles of blissful driving in my new toy. I forgot just how good they are, and how much stronger it pulls above 4000rpm. I can’t wait to start the modification route with SRD Tuning.

When I arrived at the previous owners house, I was immediately greeted with the extensive history, and the receipts for pretty much anything that has been done to the car in the UK ownership. We went through this when I went to view it anyway, but it’s reassuring to see. Although the sight of a certain “respected” tuners name in the file sent a shudder – although it was from the import and not for work. And it was a long time ago. Even though, their name is on the license plate. Suffice to say, a new plate was ordered immediately and is in the post as we speak. Wye aye, I’d not let that place tune my piano, pet. And I don’t have a piano.

Once we’d done the paperwork, and had a look around the old owners new car, it was time to leave. Or was it? No. Battery. He’d had it on trickle charge and forgot to turn the plug on! Mortified, but we got a laugh out of it. Jump leads to the rescue. 5 mins and it started first time. We left it running, shook hands and both agreed it was a pleasure to deal with each other – see, I can be nice!

I head off to Watford Gap to meet Peter, and found a Shell petrol station around 30 miles away. Plenty of distance to put a good charge in it. The fuel was low when I arrived at the Shell, and I totally forgot about the 70 litre tank. That was an expensive, but equally brilliant stop.

The 56000th mile clicked over on this journey and all was going well until the traffic built up just before the Watford Gap services turn off. That gave me 5 mins to play with the stereo. Yep. Definitely upgrading that.

After leaving Watford Gap, leaving the car there for just under 2 hours, chewing the fat, it was time to go home. Two words: very smooth. The car is only a 4 speed auto for now, with 390bhp. But it can delivery it nicely and it makes it a really nice motorway car, albeit quick and relatively thirsty. But it drives well, no noises, very few squeaks and rattles – nothing that some soundproofing won’t cure.

As night fell, the lights came on, I think. The stock bulbs in the Supra are ferociously crap. That’s already been remedied, with LED bulbs on order all around – thanks to Auto Bulbs Direct for relieving me of £295. But, I remember from my last car, just how much better night time driving became. And this will be the same – but it says a lot when I ordered the license plates first!

I got home and I was still giddy.

Isn’t she lovely. Side view, no license plate!

The post Mk4 Supra – It’s Home! first appeared on BlownByTwins.

Compressor Side:

• Compressor Wheel: The G30-770 is equipped with a high-performance compressor wheel designed for maximum airflow. The exact specifications of the wheel may vary, but it typically features an inducer diameter of around 58mm.
• Trim: The compressor wheel trim is usually specified as 84 or similar, indicating its size and design characteristics.
• Housing: The compressor housing is meticulously engineered to provide efficient and unrestricted airflow, optimizing the performance potential of the compressor wheel.

Turbine Side:

• Turbine Wheel: The turbine wheel of the G30-770 is designed for high-performance applications, typically featuring a diameter of approximately 68mm. This larger wheel size allows for increased exhaust gas flow and higher power potential.
• Trim: The turbine wheel trim is typically specified as 84 or similar, highlighting its size and design for efficient exhaust gas flow.
• Housing: The turbine housing is designed to handle high exhaust gas temperatures while maintaining optimal flow characteristics. The 1.01 A/R (Area/Radius) turbine housing is commonly used with the G30-770 to achieve a balance between low-end response and top-end power.

Specifications:

• Boost Pressure: The G30-770 turbocharger is known for generating substantial boost pressure. With proper supporting modifications and engine tuning, it can produce boost levels of approximately 2.5 bar (36.25 psi) or more, depending on specific application and setup.
• Power Output: The G30-770 is designed to support high-horsepower applications. It is capable of producing power outputs ranging from 700 to 800+ horsepower at the wheels, depending on supporting modifications, fuelling, and tuning.
• Response and Spool: The larger size of the G30-770 turbo and the 1.01 A/R turbine housing may result in a slightly slower spool compared to smaller turbos. However, the combination of a larger compressor and turbine wheel provides excellent top-end power and performance.

Here’s the table with the approximate maximum airflow in pounds per minute (lb/min) for the pair of HKS 2530 turbochargers and a single G30-770 turbocharger at a pressure ratio of 2.5 bar absolute:

From this, the G30-770 should be able to provide an extra 10lb/min over the 2530s, which is nearly 100bhp.

Here’s a comparison table with approximate RPM ranges for the G30-770 turbocharger alongside the HKS 2530 turbochargers:

So, the G30-770 should be spooling anything up to 1000rpm earlier. Hopefully more when you take into consideration the upgraded cams that I’ve gone for. With no additional peak power, I’ll have more power in more places, more of the time, resulting in a quicker car point to point. Ready for the next slap! Adventures trip to Scotland

The post The G30-770 first appeared on BlownByTwins.

Compressor Side:

• Compressor Wheel: The HKS 2530 features a high-performance compressor wheel with an inducer diameter of approximately 46.5mm.
• Trim: The compressor wheel trim is typically specified as 56T, which indicates its size and design characteristics.
• Housing: The compressor housing is engineered to provide efficient airflow and features a compact design suitable for various engine bay configurations.

Turbine Side:

• Turbine Wheel: The turbine wheel has a diameter of approximately 53.8mm, optimized for quick spooling and strong mid-range torque.
• Trim: The turbine wheel trim is often specified as 62T, indicating its size and design for efficient exhaust gas flow.
• Housing: The turbine housing is designed to handle high exhaust gas temperatures and provide optimal flow characteristics. It commonly utilizes a T25 flange, compatible with many aftermarket exhaust manifolds.

Specifications:

• Boost Pressure: The HKS 2530 turbos are known for delivering impressive boost pressure levels. They are capable of producing around 1.5 bar (21.75 psi) of boost, depending on supporting modifications and engine setup.
• Power Output: With their efficient design and moderate-sized compressor and turbine wheels, the HKS 2530 turbos can support power levels of approximately 400-450 horsepower at the wheels. However, it’s important to note that power output will vary depending on other factors such as engine modifications, fuelling, and tuning.
• Response and Spool: One of the standout features of the HKS 2530 turbos is their quick spool and excellent response characteristics. These turbos are designed to minimize lag, providing strong mid-range torque and responsive acceleration.

The post HKS 2530 Twin Turbos first appeared on BlownByTwins.