williamwong
New member
- Location
- Singapore
why not. Ive been running that pressure for quite a while. totaly stock condition.
7
GTI IS20 vs GTI IS38 *Video*
- Thread starter GTIManEG
- Start date
why not. Ive been running that pressure for quite a while. totaly stock condition.
williamwong
New member
- Location
- Singapore
I mean I peak at about 29psi. but taper down to 24psi at top end. cos intake air temp increase at top end. ok on high way high speed runs. but it heats up on stand still acceleration
Oldschoolmk7
Go Kart Champion
- Location
- Yonder
Dude, you have to subtract 14.3 from what VW shows as boost. Does not include vacuum. Lol...
Pretty sure he's on e30ish plus meth. I'm right around the same hp and about 10 less tq running straight e44.
Lol if you're looking at the boost gauge on the info screen it's off. Subtract 14.7ish to get what your real boost is, like oldschoolmk7 said
steddy2112
Go Kart Newbie
- Location
- Belcamp MD
- Car(s)
- 2016 GTI SE
Haven't read the whole thread but the dyno is set up to read engine HP calculated off of wheel HP.
Gonna keep reading and see if anyone else caught this.
EDIT:
Looks like no one pointed this out.
ReEdit:
Reading is hard
Gonna keep reading and see if anyone else caught this.
EDIT:
Looks like no one pointed this out.
ReEdit:
Reading is hard
Last edited:
Where do you see this? Those look like wheel numbers to me.
Oldschoolmk7
Go Kart Champion
- Location
- Yonder
Thank you. Surprisingly on piggy my car runs really good @ e40 ish too.
steddy2112
Go Kart Newbie
- Location
- Belcamp MD
- Car(s)
- 2016 GTI SE
Briefly, absent a compressor map I looked for a wheel of similar size, Garrett's GT2554 is very similar in size and has a map. Interestingly there are older versions of the map that extended to higher rpm's, makes you wonder why they lowered the operating envelope. Whether the older or current map, neither extends up to a PR of 3 which is where 29 psi puts things. To get to that PR the wheel needs to be turning around 190k, a speed that if you go through Garrett or BW maps you find very few wheels being designed for.
At this point I make an assumption that if a couple major turbocharger manufacturers make few products to operate at that speed regime, and the IS20 normally does not, it probably was not intended to be driven that hard.
Second reason, if the IS20 had an envelope that reliably extended that far then there would not have been need to put the IS38 into the R, simply turn up the boost a bit and have an even wider operating range in that vehicle and simplify your maintenance support to the product lines.
Hey, maybe I'm wrong, time will tell how long the IS20 lasts being pushed that hard.