Power Delivery-when Should Boost Start?

[xr_velocity]

Hi all,

Since being new to XR6 turbos I wanted to find out other people's experiences with their car's power delivery. I have a BA MK2 Manual turbo which has been edited to 253rwkw. The power comes on like so: 1500rpm to 3000rpm, feel and hear very little boost come one, power does not hit at all. 3000rpm start to hear the whistle and by 3200rpm the car takes off. I feel like there should be more down low...the car is stock other than the edit and a 2nd CAI.

I recently drove 1 stock BF Manual Turbo which felt like the power come on a lot earlier, say from just above 2000rpm.

What are other people's experiences? In a stock car with just edit does your power come on earlier than 3000rpm?

[PSYCHO XRT]

My boost kicks in a bit earlier than urs, at about 2000-2500rpm's and I have 260rwkw's.

cheers,

San.

Edited 27/11/06 11:29 PM by EXRLNT

[Phoon]

Talk to your Tuner and let him know you want it to come on a bit earlier.

[SavageF6]

Don't forget that heaps of torque down low will put a lot more stress on your gearbox.

[jordak]

Post your dyno sheets showing boost and I'm sure you'll get some worthwhile feedback

[Typhoon]

  Spruce said:

Don't forget that heaps of torque down low will put a lot more stress on your gearbox.

←

Umm.. 6 speed manual I dont think that will be a problem do you?

[xr_velocity]

I'll post the dyno graphs tomorrow.

More torque down low is what I need, I'm sure the 6 speed can handle it, they have put up with a lot more than I want to throw at it. At the moment I get very little down low, from 2500 you can feel a very small increase which doesn't keep building, it's not until 3200 that you get a power hit. I put it back to stock and it feels like it has more down low coming on from 2000.

Just doesnt feel right, stock feels so much more progressive and comes on earlier.

[JimmyXR6T04]

I found that my car originally felt a little more "sluggish" under 3000rpm, but that's due to the lag. A standard T feels like it pulls harder down low, but I don't think it does, I think its just how it feels because you're now used to the big hit at 3000rpm.

I think peak boost at 3000-3200rpm is perfect. If mine was any lower I'd get no traction what so ever.

is there anyone on this forum whos car makes peak boost by 2500rpm??? surely that's not enough time for a mildly modded XR6T to make full boost

I think that your car is making boost as per normal, and that you're just used to the more linear power of a standard T.

[jordak]

  JimmyXR6T04 said:

I found that my car originally felt a little more "sluggish" under 3000rpm, but that's due to the lag. A standard T feels like it pulls harder down low, but I don't think it does, I think its just how it feels because you're now used to the big hit at 3000rpm.

I think peak boost at 3000-3200rpm is perfect. If mine was any lower I'd get no traction what so ever.

is there anyone on this forum whos car makes peak boost by 2500rpm??? surely that's not enough time for a mildly modded XR6T to make full boost 

I think that your car is making boost as per normal, and that you're just used to the more linear power of a standard T.

←

I would have thought alot of customed tuned "T"s would be making peak boost closer to 2500 than +3000rpm.

From memory mine peaks @ 2600rpm (14psi and 750nm) with a max rwkw of around a miserly 255.

Edited 28/11/06 04:24 AM by jordak

[seventytwo]

Boost comes on fairly early 2500 to 3000 rpm, very easy to break traction in first and second. Looks good but hard to get away quickly.

Edited 28/11/06 04:50 AM by seventytwo