Max boost from a 15g turbo????

[37831999]

What is the maximum boost a 15g turbo will produce with appropriate mods???

[p fandango]

i used to run 20.8psi from mine, but the turbo is well out of its efficient boost levels running that high. 15-16psi is about as good as you can expect from it

[Murphy]

30psi is fine

http://carphotos.cardomain.com/ride_images/1/2558/2061/6393530108_medium.jpg

[T5 ROB]

I used to run mine at 18 PSI and had no problems and will be running the same again in the new car.

[Nealevo]

i would go for 18psi for longivity of turbo and other bits, but upto 20-21 acceptable, or just push the right foot pedal a little harder :-)

[Alan M]

I would change the turbo for a more efficient item if you want high boost numbers. They are really inefficient when out of their respective efficiency island if you take a look at their compressor efficiency maps. Really much beyond 18psi is not worth it from a 15g even with extensive cooling mods and WI.

[JelT5]

Out of interest, what's the maximum (efficient) boost on an 18T Alan? Around 1.7bar?

[T5frankie]

Out of interest, what's the maximum (efficient) boost on an 18T Alan? Around 1.7bar?

my 18t ran out of puff at 22psi (1.5 bar)

[JelT5]

Cheers Frankie, my guess wasn't too far out then.

[Alan M]

http://www.stealth316.com/images/td04h-18t-jlspec.gif
This is a compressor map for the 18t.
http://www.stealth316.com/images/td04-15g-jlspec.gif
This is the efficiency map for a 15g.

[JelT5]

http://www.stealth316.com/images/td04h-18t-jlspec.gif
This is a compressor map for the 18t.
http://www.stealth316.com/images/td04-15g-jlspec.gif
This is the efficiency map for a 15g.

Hi Alan, links not working :(

[claymore]

Hi Alan, links not working :(

Work for me :)

[JelT5]

No need to be so smug about it ;) I'm getting this below...

must be cos I'm foreign lol

http://i912.photobucket.com/albums/ac327/JelsT5/Boo.jpg

[p fandango]

hate to have to back Jerry up, but didn't work for me either

[claymore]

OK, try these

18t
http://i170.photobucket.com/albums/u258/claymore2k/td04h-18t-jlspec.gif

15g
http://i170.photobucket.com/albums/u258/claymore2k/td04-15g-jlspec.gif

[JelT5]

Brilliant, thanks mate :)

[JelT5]

hate to have to back Jerry up, but didn't work for me either


Bloody hell! It's a miracle...I'm a believer pmsl

[p fandango]

i do like the pretty colours, but what the hell does it mean? lol

[p fandango]

Bloody hell! It's a miracle...I'm a believer pmsl
i did say i was unhappy about backing you up, too busy to think any proper insults i'm afraid mate :wink:

[JelT5]

too busy to think any proper insults i'm afraid mate :wink:

I'm surprised you're even awake lol

[p fandango]

I'm surprised you're even awake lol
i'm only awake physically, not mentally lol

[Alan M]

Pr = (desired boost + 14.7) / 14.7

CFM = (engine cc x rpm x Ve x Pr) / 5660

A few calcs for those interested.