other then the cange of postition of the carby not a great deal.Stronger gaskets aren't as neccessary in 'suck through' than they are in a 'blow through', due to the fact that the carby has to hold more pressure.

The 'suck through' set up is much easier, because the carby doesn't require any major modification seeing that theres only air flowing through the carby.The main drawbacks are that the fuel-air mix must pass through the turbo. Since fuel is denser than air it will tend to separate in the turbo and puddle up. Don't expect instant off-idle throttle response. The turbo also becomes less efficient because it has to pump this heavier fuel mixture, and it is trying to do it's job after the carb has already caused a pressure drop. You basically have the carb causing a pressure drop and the turbo trying to increase the pressure. The efficiency losses translates into a hotter fuel-air mix in the engine which limits the boost you can run and your power.

The main reason i prefer an SU over a webber is because the SU is so simple and heaps easier to tune, and the results are just as good as each other.Webber has to be jetted correctly

whats this SU book called?

think i might need to expland my library collection to a total of 1 books

Hey steveo wat exactly is invovled for a weber to handle boost stronger gaskets ?

You can get light weight springs around 4 ounces up to 12 ounces or there abouts. these help control how much the the needle lifts up. the heaver the spring the the richer the mix when you open the throttle.

i was under then impression that the damper rate was to do with the grade of the oil

I can't see how tuning a single su can be hard . As long as you have a few needles to play with and maybe a few different tension springs to change the damper rates, put the car on the dyno and sort out your af ratios. once it is set just keep the damper filled with auto trans fluid and you won't have to touch it.

"Su midel" are great for support and parts.

Good luck.

fair enough, will seriously look into it for sure.

thanks

SU's are so much easier to tune than webbers! once you learn its dead easy!

Of course instead of using a SU you could use a webber if you like, alot more involved it setting a webber up to handle boost.

haha, got me there.
thanks mate

the only problem is i dont know how to tune a su, haha.
been told they need it nearly every month so it could be costly