jura11

iTrader: (7)

As Shaun pointed out,meth will not give better spool up,only give higher torque and bhp figures

Here is MDX321T on our 2.1L

V-power alone





V-power and 20% meth






Jura

Shaun

Your mechanic and your mapper is bulling you! Ask your mechanic and mapper to explain how meth physically enables quicker spool.

I've been there and done the testing and comparisons... Like so many others have.

Rob Day

iTrader: (78)

Sorry your right, I'm being a pleb. It increases torque as said, which seems to compensate for a loss of spool, I've lost myself in conversation

Rob Day

iTrader: (78)

Hi Joe. All MY01> STI's are a 6 Speed of some description. They are renowned for taking big power applications.

Rob

Shaun

Agreed..... that is lethargic for this kind of set-up.

Shaun

People can get disheartened when one car even with the same mods doesn't get what one other achieves. It get's what it get's and one shouldn't expect too much.

My turbo which is similar to a SC46, achieves 490/475 on a standard 2ltr, on Vpower + Meth..... doesn't mean all others would, as I believe mine is pretty much at the top of it's potential envelope in an ideal world...... not all set-ups are as such though. That's the way it goes.

joe v3sti

iTrader: (8)

Oh yeah mate I know there good for the big power I was just thinking with regard to what ratios you have and how that will effect gear change and lag etc

Joe

stevebt

iTrader: (8)

Mine has just broken the selector fork which is supposedly pretty rare ? So they aren't as unbreakable as people think wen pushing power.

Shaun

Steve,
You're at 600bhp and only just managed to break a rare part - that puts it in to perspective. They are mighty tough for an OEM item.

Rob Day

iTrader: (78)

Yes but not everyone is running the kind of power your pushing, and most Subaru's even modified don't see the track, thus the strains that yours will have seen.

JTinnovations

iTrader: (2)

Also, don't mix up "boost threshold" and lag. The former is the rpm you need, in a given gear, to get a particular amount of boost. 1 bar is a frequently used for comparison. For example, mine hits 1 bar at about 3400 rpm in 6th, but it will need around 4000 rpm in 4th due to the reduced load.

What that means, in practice, is that you have to use the gearbox to get the revs up and get it all "on song".

But lag is minimal. Once on song, when you change gear, boost is back pretty much instantaneously. If you have a "laggy" setup, you'll change gear and hang around while the boost builds up again. Horrid to drive.

Most current turbos and setups aren't really laggy at all. But some may need to see more rpm from an off-boost start, in a given gear, before they start working. That makes them less driveable, but not laggy per se.

IMHO

stevebt

iTrader: (8)

Shaun mine will be high 600's, I haven't been on the rollers but it runs 2.3bar to the redline on 20% meth and a bllet gt35r.

The last three time I have taken the car out to an event it has broken something, its getting a bit of a pain

gussy

iTrader: (2)

yes they are a tough part but it wasnt broken by Steves fair hands Shaun so put that into perspective

stevebt

iTrader: (8)

Gussy it may of been Gav that broke the selector forks but the car is still running the power it is and its right on the verge of being able to run a 6 speed box

Rob Day

iTrader: (78)

Steve, your at the brink of "what's going to go next". Unless cost is no problem in which you will just upgrade everything, then you will continue to break the next thing. If it's not the box, it's a drive shaft.

gussy

iTrader: (2)

I dont disagree with you Steve as you are at the point where the gearbox is the weakest link now

stevebt

iTrader: (8)

Rob the driveshafts break easier than the selctors, it was the cv joints that broke when I took the car to Elvington

stevebt

iTrader: (8)

I know