Kol12's not quite right B4

I've got a 1999 B4. I'm finding the second turbo doesn't have much kick in 3rd gear when highway driving (overtaking) Is this normal?

At what revs

Well the second turbo seems to kick in at just over 5000 revs so there. I find it's hard to get it up there in 3rd gear when overtaking sometimes. I also don't feel the second sometimes.

No it just takes a bit to get up to second turbo when overtaking sometimes. I usually drop from 4th to 3rd to overtake so when in 3rd revs are about between 3-4000 then it's the push from there to 5000 that's a bit slow sometimes. It's all probably completely normal though I suppose.

Realising in the 3-4000 rev mark there's no turbo pushing so maybe that's why.

Lel

Car runs perfect apart from it doesn't

 Andy_Mac said:

What makes you think there's no turbo pushing at 3-4k?

I thought once you've gone above the 2-2500 revs the first turbos done it's job..

No, not so much

It's only just waking up at 2500, you feel a "dip" as it switches the second one on at around 4-4500, then both are awake after that

3.5k to 4.5k is my VOD range, it is definitely flat during that range, feels like an NA 2.5 or 3 litre. Post 4.5k I am off like a rocket, the faster the car gets, the faster I accelerate.

For example, first gear is a bit meh, second gear not bad, third gear is weeeee and 4th is limiter pegging/boost cut.

That's the LOL part of the TT.

It's fun to drive but the newer single turbo is easily the better motor. It would be interesting to see what a full VVT enabled engine could do with the TT setup tuned correctly.

Mine drops to 10-11 psi through VOD where peak is nearly 20psi on secondary which is a decent contrast. It's all relative, as I said VOD feels like a 2.5 or 3.0 NA engine relative to the 15-20psi 2.0 from about 5krpm.

As you say, shifting into VOD sucks but you learn to drive around it or through it.

I would love to tinker and tune my setup a bit more but I think I already have 95% of the potential out of it and the hours and $ to get that extra 5% I think could be better spent on my other car and gaming heh.

What is this VOD you speak of

 Marky said:

What is this VOD you speak of

Quiet you in the RevD seats...

 GorGasmSpecB said:

3.5k to 4.5k is my VOD range, it is definitely flat during that range, feels like an NA 2.5 or 3 litre.

I think this is the same for me except that my secondary turbo isn't kicking in until 5500 rpm? Seems quite late, does it need adjusting?

I have no trouble getting boost at 2500 rpm.

 Andy_Mac said:

So you have boost at 2.5k, whats it doing at say 3k?

Just revving along I suppose. Is there actually any active boost after 2.5k? I mean does the primary provide power through the rest of the rev range before hitting the second?

The main thing that doesn't seem right is my 2nd turbo coming on so late (5.5k?) I'm not really getting the boost I need to overtake early enough.

I know this is a bit off topic but would anyone mind checking out my thread http://clubsub.org.nz/forum/showthread.php?47863-Phoenix-Gold-Tantrum-300-2-amplifier-or-Soundstream-brand-new

I've listed some amps and components I'm interested in and I'm ready to buy now but would like some opinions.

Yeah I think it does have boost after 2.5k, I can feel it. I'm reading boost by feel. When exactly does VOD occur?

BE5 - Is that the revision? Any idea why the second isn't opening till 5.5k? Seems late.

Is there a way to get the 2nd to kick earlier? I'll have to check my engine bay tmrw.

I probably should look at sticking a boost gauge on. Is gauge only really any good for determining how well the turbos are functioning?

If you can get your hands on a zerosports controller you can