South Africa's First and Only 2-stroke Forum

Got a few mates that are part of the scooby club! Awesome cars! There are a few running around that push over the 500 kw mark! Must be frightening!!! But big bucks! Ive heard stories of guys that have more than a bar spent on track scoobies!!!

Talking about the lag above, that's why a lot of the new turbos are dual vane, making for a quick acceleration and then a big whack up the ass when the bigger vane gets going as well.!!! "drool"

(05-13-2010 09:46 AM)Bansheesa Wrote: [ -> ]The answer is quite simple. Think of it this way: You have 2 compressors with exact same pumping capacity, 1 with an 80l tank and the other with a 120l tank. Which one will fill up quicker? The small one of coarse. This answers the question of the intercooler. The small one will be much more aggressive with the turbo banging in early thus making the small one faster on acceleration. The big one has more air to pressure up to boost level making for a lot of lag and late boost, making for slower acceleration. Both of them will sign of at the same time.

Mmmm, I love a Scooby. Had 2 worked STi's too. Very very nice car and 1 that I will not dare to challenge with my ST. LOL

But if you boost high lets say 1.5 bar, wont a smaller intercooler restrict flow to a certain extent? Or is the negligible?

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I read on someone's sig, think it was on the VW Forum, having a N/A car is like suffering from never ending turbo lag...

M, it will restrict flow, but the amount you gain vs the flow restriction by choosing the right size cooler, there is no argument NOT to fit one.......

Fair enough, was just referring to a bigger one vs a smaller one. I suppose the size has to be proportional to the size of the turbo.

If running an out of whack pressure of 1.5 bar, your lag will be considerably shorter with a large intercooler, but still a lag against the smaller cooler. Your flow becomes a part in the top revs only. Usually a good small intercooler will allow for 1.4 bar of boost with very little to no restriction on the flow side. I must also add that if you choose to run large boost like 1.5 bar that I would rather consider the larger intercooler due to less knock on the internals of the motor. Like I said previously that a smaller intercooler hits harder. Also 1.5 bar boost asks for only the best components in a car.

Added that boost is but a small part of power in a turbo car ( As BVH said earlier ). Some of you that hang at Tarlton should know J Verviers. I converted a 1.4 Nissan bakkie with a 4agze wide port 16V blacktop motor. Tossed the Supercharger and bolted a T3T4 turbo and some other stuff onto it. Running at 0.7 Bar boost and pushed 301kw on wheels Dynojet Dyno. J Verviers is still running 10 flat with that bakkie. This piece of info just to show that boost isn't everything.

Problem with dual vane turbos is that it signs off too early. Hybrid is the way to go...

(05-13-2010 09:51 AM)ozosborne Wrote: [ -> ]Got a few mates that are part of the scooby club! Awesome cars! There are a few running around that push over the 500 kw mark! Must be frightening!!! But big bucks! Ive heard stories of guys that have more than a bar spent on track scoobies!!!

Talking about the lag above, that's why a lot of the new turbos are dual vane, making for a quick acceleration and then a big whack up the ass when the bigger vane gets going as well.!!! "drool"

If you are reffering to a certain black and silver one
they seriously are impressive - ive seen them first hand

The one mates that's over 300kw's is just silver, completely gutted with roll cage and all the decent suspension upgrades that you can think of. But he's straipping it and making it stock again to sell it. :-(