P20SPD

iTrader: (1)

Pretty much the same in 4th and 5th, as the 6 speed in 5th and 6th, assuming its a uk 5 speed Graham.

alanbell

iTrader: (6)

Job at top gear for Steven >> what and do the stig out of his job LOL >> thanks for the driving lesson steven , Im very pleased with my car , thanks >> Alan.

stevebt

iTrader: (8)

have you changed your pants now alan its always bad being a passenger in your own car when its being thrashed it makes no difference in someone elses car but in your own

P20SPD

iTrader: (1)

He said drive it, so i did

stevebt

iTrader: (8)

PMSL i would hate to be a passenger in my car with you doing the same always makes me wonder how andyf manages as he is always looking at his laptop when people are ragging there car along the road at mach 1

new boy

i wondered about that laptop when he mapped mine ..

i guessed he just had a serious "Microsoft Solitaire" addiction??

ads

alanbell

iTrader: (6)

Im just a bad passenger !!!!!

willy

4TH gear mapping made me smile... take it to max revs...
I almost ran out of road...
Andy F just sits there cool as a cucumber LOL.

*****

XNWRX

Wonderful turbo. I would say the best one in the 370/450 hp range.
On my STi7, it makes 1 bar @3100RPM and 1.65 bar@3500 RPM in 5th. in 6th gear, 1 bar@3000 and 1.65@3300 No surge. The car made 55mkg and 400bhp with 1.45 bar @ 6300 RPM.
Only mods : PowerStation header (including up-pipe), TD05/06-20G, Helix 3" down-pipe and MADAC 2.5" exhaust line, Walbrow 255L/H and FPR set to 3.5 bar, ITG panel filter. Home-made boost and AFR controllers.
No doubt that not so many Turbos can offer such a flat torque curve from 3600 to 5500 RPM...
Thanks Andy ;-)

Andy.F

No problem Xavier 1.65bar at 3300 rpm without surge is proof if anyone needed it that the TD05/06-20G is actually well suited to a 2.0, particularly the Sti with its extended rpm range, the smaller turbos tend to die off at the top.

Are you doing anything with the AVCS that may be improving spool on the Sti7 ?

What octane fuel are you using in France for those 400bhp power runs ?

Andy

carlos_hiraoka

Andy indeed the later STi ver 7/8 heads flow a lot more ..... that surely helps.

Carlos H.

Pavlo

1.65bar at 3500 is proof that Xavier's car doesn't have a surge problem, I don't think every car will do that well. But most people will not want to run that much boost anyway.

However, should someone want to, I have a brand new td05/06 20g in stock!

Paul

Andy.F

Alan Bell no surge at 1.5 bar at 3300rpm on a 95/96
Alan G no surge at 1.45 bar at ??rpm on a 99
Xavier no surge at 1.65 bar at 3300rpm on a Sti7

I see a trend forming here with the later spec turbos I have supplied

Last week you were telling me how you have only ever sold one turbo, good luck with your 2nd one

No doubt you will make good use of the technical info I have divulged to you Paul to make a success of your business My only saving grace is that you didn't get the full story on the 20g !

Andy.

Andy.F

You think so Carlos ? I thought there were a few people having difficulty getting the figures from the Sti 7&8 ?

Andy

Pavlo

As you and I both know, some cars are better than others. If someone wants to buy a 20g, that's fine, but I think they need to be aware of the possibility they may not get the very best results a few other people do. When the vast majority of people are all getting no surge issues running boost over say 1.4 bar (below which they are quite surge resistant anyway), then that's good for everyone, until then the 20g requires some careful thought.

A journey of a 1000 miles begins with the first step.

So now your having a go at me over information you openly gave me?

Paul

Andy.F

Yea, I'm always a bit blunt the day after a works night out.......ouch

Pavlo

Okay then,

In that case, I really hope you do well with the information I haven't yet given you. No doubt you will use it further your business

wrxtasy

Sorry a little off topic here, but can the standard wrx gears handle the 18G say at 1.3 bar? or is it too much for the std gears?

cheers,

suhail

Andy.F

For a little while !

The 16G can blow a WRX or 5Spd UK box if it is mapped for much over 320lb of torque so the 18G or 20G will kill them eventually if used in anger. It really depends on how it is mapped and driven but I'd say anything over 1.3 bar is operating in a time limited zone.

Andy

wrxtasy

Hmmm, thanks Andy, is there anyway to strengthen the std transmission to hold such torque? I don't want to go through the process of having to change to say RA gearing The car will be used as a daily driver and i'll probably never go to the strip unless once a year or something, Jerry from deadbolt said it should hold up just fine as long as it is driven sensibly, also the car will be mapped for 93 oct, i doubt i'll see figures much higher than 320lb/ft of torque on 93oct or am i wrong?

suhail

DreXeL

I just got back from a RR day, and I got 346bhp, but a fairly low 281 lb/ft of torque, which is down to the fact that it's quite slow spooling on my car. I'm runnning 1.3bar boost.

I'm very pleased with that power figure, not bad for 110k mile UK slapper

Andy.F

Suhail - Is your 93octane r+m/2 rating or 93 ron ? If the latter then you should be safe regards torque, either way as long as you don't map in too much midrange boost and timing the box will live ok.

Drexel - I wish we could get to the bottom of why your engine has always spooled its turbos (vf34/tdo4/20g) that bit slower than other similar spec cars, it is obviously nothing terminal in that it can make 346bhp at 1.3 bar

Andy

tweenierob

My 05/06 surged like a bastid with the OE inlet pipe? maybe the oe pipe isnt so bad after all?? (high boost low down)
Bit off topic but has anyone else had good results with the std pipe?

Just gathering info before i put my stock of 98inlet pipes up for sale at double money

Rob

Pavlo

cams at a guess.

I changed my cam timing and lost a few 100rpm of spool up after TOTB3.

Paul

DreXeL

My cam timing was out, I re-set it and it improved spool-up by nearly 500rpm, but as Andy said it seems my engine just doesn't spool turbos up quickly for some reason. I have 110k miles on the clock and a bit of piston slap, would blow-by kill spool-up?

Here's the graph BTW:

Graph

As you can see power was still climbing right up to the red-line, but I don't exactly have a wide power band, but that is just the way my engine spools it's turbos, not just the 20g.

Pavlo

Rolling road spoolup can be in no way applicable to the road. Sometimes it's okay, but often the car has a stone cold exhaust which kills EGT to the extent the ex gas can't get enough velocity to spool it up. A few runs to get the EGT up to over 600ēC at the start of the power run may be all that's needed to bring the turbo in 500rpm to 1000rpm sooner. I suspect there is more to it in this case as Andy seems to think there is an issue.

Paul

DreXeL

It's slow to spool on the road too, maybe a few hundred earlier than on the rollers.

Andy.F

I also suspected cam timing Paul, when Ben had it checked it was found to be out a tooth which improved things slightly but this engine has always had slow spool up, the vf34 was 1 bar around 3500 in top. Even holding it back on the brakes doesn't improve the boost threshold.
I still think it is cam related, it feels almost normally aspirated with a vtec bump around 5k and then pulling increasingly to the limiter, just exactly as shown on the power graph.

Andy

XNWRX

Nothing has been done with the AVCS...yet !
We are using 98 octane in France...good quality.

Pavlo

Drexel,

I think you need to check your cam timing with a DTI on the cam lobes or something, as they may not be timed as you think when using the factory marks.

Paul