Big twin V Single

Only had my TT VVTI 10 months or so and have very limited knowledge on power upgrades, but so far its had a BPU at JM Imports. Looking through the various forums and internet sites, when you want more power, there are these two options...Big Twins or Single

What are the pros and cons of each option ?

Once my respray is finished and some interior bits complete, i will probably start looking at more power !

I realise after the BPU it starts to get very expensive, so why would you choose one option over the other ?

Some of the major points

Twins

- Looks and sounds badass

- Most kits available are old school and laggy and hard to source

- Less aftermarket support (manifolds etc)

- More parts to go wrong / upkeep

- Generates more heat / even harder to manage heat soak

- Most twin setups are running compound (working together), rather than sequentially. Power delivery may feel similar to a big single if running compound setup.

- More expensive

- Issues with space and fitting everything in

Single

- Modern billet ball bearing turbo's are becoming so efficient and powerful that shooting for a responsive but powerful setup can be done adequately with a single.

- More part support and overall less expensive to setup

- Easier to install

When comparing an older twin setup with a modern single, I'd struggle to see why twins would be the go to choice other than just choosing something different/look badass.

That said, if you got some money to burn and fancy doing something really different. Creating a compound twin system using modern turbo's would be a very interesting project, or if you really want to go hardcore try to get a sequential system setup. I can't think of anyone in the UK who has done this, maybe someone in the USA has been crazy enough to try.

Some of the major points

 

Twins

- Looks and sounds badass

- Most kits available are old school and laggy and hard to source

- Less aftermarket support (manifolds etc)

- More parts to go wrong / upkeep

- Generates more heat / even harder to manage heat soak

- Most twin setups are running compound (working together), rather than sequentially. Power delivery may feel similar to a big single if running compound setup.

- More expensive

- Issues with space and fitting everything in

 

Single

- Modern billet ball bearing turbo's are becoming so efficient and powerful that shooting for a responsive but powerful setup can be done adequately with a single.

- More part support and overall less expensive to setup

- Easier to install

 

When comparing an older twin setup with a modern single, I'd struggle to see why twins would be the go to choice other than just choosing something different/look badass.

 

That said, if you got some money to burn and fancy doing something really different. Creating a compound twin system using modern turbo's would be a very interesting project, or if you really want to go hardcore try to get a sequential system setup. I can't think of anyone in the UK who has done this, maybe someone in the USA has been crazy enough to try.

Thanks for the info, I have heard the big twins get hot under there !!

Big twins run parallel, you want to know what a couple of small turbos feel like you can do the true twin conversion on a stock motor, you get increased lag, smoother curve as there is no switch over and more noise, now replace with bigger turbos and you get the idea.

Big twin setup does look very nice when all put together but with modern turbo tech I see no real point over a decent single setup which cost less, less to go wrong and far easier to setup and maintain

Small single really, with a decent sized AR turbine housing. But depends on what your power goals are, bigger power = bigger turbo = more lag.