Official Turbo Size Thread - Page 3 - SRT Forums

ptperformance · 08-04-2006, 09:14 PM

Quote: Originally Posted by jersturbo

have you got the 20G wheel in your S3 turbo now, and running?

Quote: Originally Posted by Tex

but the stage3 is a bigger inducer meaning more likely to surge, but doenst in its housing. i have yet to have an issue, but we will see

Again you can cut the wheels down to take care of those problems.

Tex · 08-04-2006, 09:18 PM

exactly...though it does start to hurt the fact that your running a larger wheel???

hey john, have you measured those wheels yet?

Vector · 08-04-2006, 09:31 PM

Quote: Originally Posted by Tex

exactly...though it does start to hurt the fact that your running a larger wheel???

hey john, have you measured those wheels yet?

Tex whats your opinion on the GT2871R i picked up its the 53mm inducer .63 exhaust map shows it just touching 46 lbs/min

any thoughts would be interested in them

sorry to add this i see you posted it to date i am the only one i know of to have one looking forward to getting you more info on it spool and hp/boost numbers

Tex · 08-04-2006, 09:41 PM

that should actually be a good setup. that turbine housing is a bit on the small side, but thats good because it will keep it streetable. lots of potential power. 55 trim, 71mm exducer 53mm inducer. i would expect atleast 450hp!!!

Vector · 08-04-2006, 09:51 PM

Quote: Originally Posted by Tex

that should actually be a good setup. that turbine housing is a bit on the small side, but thats good because it will keep it streetable. lots of potential power. 55 trim, 71mm exducer 53mm inducer. i would expect atleast 450hp!!!

ya i was just going over al lthe info you posted on the first page converting mm to inch and looking at its specs to the stage 3 and other turbos.

nice write up man thanks for your time

last ? for you how does it exhaust side compair to the other turbos thats a big part of the turbo to you say its small i can see its small just looking for techy info

could you list that info for say

GT28
GT30
GT35

turbonetics
Stage 3
stage 5

and other turbos? stock stage 3 ect ect

Tex · 08-04-2006, 09:57 PM

before the turbo list, i included the inducer measurements for the turbine wheels (on turbine wheels the inducer is the big side and exducer is the small side, opposite of the compressor wheel). i do not have the trim sizing of the turbine wheel, so i just included the major size for the time being.

jersturbo · 08-04-2006, 10:27 PM

...get that thing on a dyno!!

Quote: Originally Posted by Tex

no pics. just had my machine shop port the heck out of the compressor housing. really didnt have much to do with it. gave him the wheel and the turbo. he did the rest

Tex · 08-04-2006, 10:28 PM

i will here eventually. i cant get traction in 2nd, at 16psi, with stock AEM EMS timing map. remember too, im running 245mm tires

jersturbo · 08-05-2006, 02:08 PM

Quote: Originally Posted by Tex

i will here eventually. i cant get traction in 2nd, at 16psi, with stock AEM EMS timing map. remember too, im running 245mm tires

that right...you're running the AEM-EMS...
...still, get they self to the dyno, pronto!

Mine is little different (just finishing a few little things, waiting on one part) being that it's the whole Evo 9-20G CHRA, running on the S3 ECU (AGP WGA once basic tuning is done)

.

Tex · 08-05-2006, 04:26 PM

i will here eventually. my injectors showed up today...again. hope this time there are no issues and i can actually make more boost than stock!!!!!!

jersturbo · 08-05-2006, 10:45 PM

hey John,

since we're on the subject of a larger (i.e.20G-HR) comp wheel, on a TD05 (S3) CHRA...

in this example ^^^

...(1.) will clipping the TD05 turbine wheel introduce lag in the spool up of the turbo, given the larger mass of the comp (20G) wheel?

...(2.)and how can you tell if the turbine wheel has been clipped to far?

...also (3.) would clipping the compressor wheel's exducer (only) a bit, allow for reduction of the comp wheel pressures that the 20G-HR has been noted for having at high rpm??

...curious to know??

thanks
Jer

Quote: Originally Posted by ptperformance

Quote: Originally Posted by jersturbo

have you got the 20G wheel in your S3 turbo now, and running?

Quote: Originally Posted by Tex

but the stage3 is a bigger inducer meaning more likely to surge, but doenst in its housing. i have yet to have an issue, but we will see

Again you can cut the wheels down to take care of those problems.

Tex · 08-05-2006, 11:01 PM

1. clipping the wheel does introduce lag. you loose some of the suface area on the turbine wheel, for exhaust gases to push along. plus you are giving the air a pocket to get around the wheel. however, this is why you clip it. to allow more air to get around the turbine wheel. the larger wheel is also going to hurt spool up as well. is it possiable to throw the stage3 TiAl wheel in and clip that, as opposed to the inconel evo wheel? that wil help make up some of that lag

2. the further you clip, the more lag there will be, but the more power will be able to be made. john may know more...no, he does know more, about the specifics, but as far as i know. the only way to tell is if it lags to 5k you clipped too much. and remember to balance after machining!!!!!!

3. are you refering to the surging issues or the increased IAT issues

oh and john, did you get a chance to measure that snail up. i have had some people ask me questions, and i would love to beable to use this reference as a guide to help make you some sales

jersturbo · 08-06-2006, 01:00 AM

Tex, this general info ^^^ is well known to me...and my other turbo's with clipping done...

...what I am specifically after from John's insight, is his experience with thier SS turbo's and some S3's he's had clipped...

...as each turbo (series of) behaves differently.

John, with you're first hand experience with your SS turbo's and S3's...what of the below Qs can you expand on?

Thanks
Jer

Quote: Originally Posted by jersturbo

hey John,

since we're on the subject of a larger (i.e.20G-HR) comp wheel, on a TD05 (S3) CHRA...

in this example ^^^

...(1.) will clipping the TD05 turbine wheel introduce lag in the spool up of the turbo, given the larger mass of the comp (20G) wheel?

...(2.)and how can you tell if the turbine wheel has been clipped to far?

...also (3.) would clipping the compressor wheel's exducer (only) a bit, allow for reduction of the comp wheel pressures that the 20G-HR has been noted for having at high rpm??

...curious to know??

thanks
Jer

Quote: Originally Posted by ptperformance

Quote: Originally Posted by jersturbo

have you got the 20G wheel in your S3 turbo now, and running?

Quote: Originally Posted by Tex

but the stage3 is a bigger inducer meaning more likely to surge, but doenst in its housing. i have yet to have an issue, but we will see

Again you can cut the wheels down to take care of those problems.

Vector · 08-07-2006, 03:32 PM

GT2871R

floor it at 2100 RPMs in 3rd 24 psi no surge

dyno numbers coming 8-20-06

ptperformance · 08-11-2006, 08:21 PM

Quote: Originally Posted by Tex

oh and john, did you get a chance to measure that snail up. i have had some people ask me questions, and i would love to beable to use this reference as a guide to help make you some sales

No, and I have heard that TCC is watching so I will post some pictures and go from there. These are stock wheel vs PTP wheel, hope you like. I hope to have the PTP wheel vs the TCC wheel as well for pictures very soon.