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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > ASR 135 vs. modded GTR and modded 997tt



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      11-11-2009, 01:14 PM   #177
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Quote:
Originally Posted by asr engineering View Post
According to the data we have, the A/T will not have any issues at all holding up to the power of our Stage I or II. Stage III, on the other hand, is something that needs to be tested and monitored first before we can give an honest answer.

The longevity of the A/T transmission with Stages I and II have a lot do with how the car is being driven. If an A/T customer is abusing the transmission with brake boost launches on a daily bases or daily abuse in general, you can't expect the clutches to last very long. For those that are not abusing it every time they get in the car, they shouldn't expext to see any negative affects at all. Although, I would recommend a transmission oil cooler for those with A/T tranmissions that plan on doing our TT upgrades.
I didn't think anyone was making a transmission cooler for the ZF auto gearbox yet?? Anybody know any different?

Also what power outputs are you envisaging for each stage of your TT upgrade?
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      11-11-2009, 01:28 PM   #178
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Quote:
Originally Posted by asr engineering View Post
According to the data we have, the A/T will not have any issues at all holding up to the power of our Stage I or II. Stage III, on the other hand, is something that needs to be tested and monitored first before we can give an honest answer.

The longevity of the A/T transmission with Stages I and II have a lot do with how the car is being driven. If an A/T customer is abusing the transmission with brake boost launches on a daily bases or daily abuse in general, you can't expect the clutches to last very long. For those that are not abusing it every time they get in the car, they shouldn't expext to see any negative affects at all. Although, I would recommend a transmission oil cooler for those with A/T tranmissions that plan on doing our TT upgrades.
ASR, would you mind answering the following?

1 - Has the wastegate problem been addressed in your upgrade like Turbo Dynamics did?
2 - Are any cars equipped with the upgrade driving around in Europe?
3 - Would an upgraded clutch be mandatory for your upgrade in a manual transmission car?

Thanks in advance,

Alpina_B3_Lux
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      11-11-2009, 03:13 PM   #179
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Quote:
Originally Posted by E92Fan View Post
I didn't think anyone was making a transmission cooler for the ZF auto gearbox yet?? Anybody know any different?

Also what power outputs are you envisaging for each stage of your TT upgrade?
At this point we don't know of any company making a transmission oil cooler for the A/T gearbox. It was just a sugestion that would be advised if the TT upgrades are done. I imagine we will have to make one if no one else does.

The power outputs for the different stages were posted quite a while ago when we finished the package. For those that didn't get a chance to see it, here it is.

Stage I would be a pump gas file producing an average of 430-440whp @ 15-16psi with at least an intercooler, dp's, and exhaust required. Stage II would be pump with a methanol kit required in addition to a higher flowing intake, putting you at 480whp @ 18psi. Stage III would be 103octane + meth requiring a clutch upgrade if manual, putting down an average of 505whp @ 20psi. If our parts are used in addition to the kit they will have the ability to support more hp since they were specifically designed for our turbo upgrades. An example of that is how our car produces 538.63whp and 530.12wtq at Stage III with all of our bolt-ons. The figures given above are easliy obtainable based on most aftermarket parts that are available to the general public through many companies.

Last edited by asr engineering; 11-11-2009 at 04:54 PM..
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      11-11-2009, 03:20 PM   #180
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Quote:
Originally Posted by Alpina_B3_Lux View Post
ASR, would you mind answering the following?

1 - Has the wastegate problem been addressed in your upgrade like Turbo Dynamics did?
2 - Are any cars equipped with the upgrade driving around in Europe?
3 - Would an upgraded clutch be mandatory for your upgrade in a manual transmission car?

Thanks in advance,

Alpina_B3_Lux
1) Yes, we the wastegate problem has already been addressed and will not be an issue with our TT upgrades.
2) At this time there are not any ASR TT upgrades installed in the region of Europe.
3) We worked quite extensively with SPEC clutch to develop a clutch kit for the N54 manual transmission, as well as an aluminum flywheel. An upgraded clutch is only recommended for Stage II and required for Stage III. A stock clutch will be fine for a Stage I as long as it doesn't have a history of abuse.
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      11-11-2009, 03:43 PM   #181
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Originally Posted by enrita View Post
i have tractions problems with LSD as well ;-)

Its that cold a* Swedish air -

Naw, I know what you mean, I can still blow away first if not careful.
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      11-11-2009, 04:50 PM   #182
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Quote:
Originally Posted by asr engineering View Post
1) Yes, we the wastegate problem has already been addressed and will not be an issue with our TT upgrades.
2) At this time there are not any ASR TT upgrades installed in the region of Europe.
3) We worked quite extensively with SPEC clutch to develop a clutch kit for the N54 manual transmission, as well as an aluminum flywheel. An upgraded clutch is only recommended for Stage II and required for Stage III. A stock clutch will be fine for a Stage I as long as it doesn't have a history of abuse.
Thanks for answering the questions! That is helpful.

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      11-11-2009, 04:54 PM   #183
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Quote:
Originally Posted by Alpina_B3_Lux View Post
Thanks for answering the questions! That is helpful.

Alpina_B3_Lux
No problem!
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      11-11-2009, 06:35 PM   #184
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Quote:
Originally Posted by asr engineering View Post
We worked quite extensively with SPEC clutch to develop a clutch kit for the N54 manual transmission, as well as an aluminum flywheel. An upgraded clutch is only recommended for Stage II and required for Stage III. A stock clutch will be fine for a Stage I as long as it doesn't have a history of abuse.
Please provide more info ASAP.
I have the car on dealership waiting for clutch replacement , I need to decide asap on what to do. I do care mostly on pedal stiffness as I'm really bothered from a strong & stiff feeling the upgraded clutches has.
thx
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      11-12-2009, 06:40 AM   #185
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ASR please another 3 questions about your turbos:

1) what is the max PSI they can produce safely until redline, lets say 6.5Krpm?
2) what is the increase of flow (%) and efficiency compared to OEM turbos?
(is the compressed air temperature lower than OEM turbos?)
3) is the turbo lag increased and when is the full boost achieved (rpm)?

Turbo upgrade is always a trade off between power at high rpm and turbo lag + torque at low rpm
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      11-12-2009, 07:36 AM   #186
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Quote:
Originally Posted by marconi118 View Post
ASR please another 3 questions about your turbos:

3) is the turbo lag increased and when is the full boost achieved (rpm)?
Shiv already answered this question, he said that he did not notice an increased turbo lag but rather the contrary, i.e. a faster spool up of the upgraded turbos.

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      11-12-2009, 10:19 AM   #187
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Quote:
Originally Posted by Panoz View Post
Please provide more info ASAP.
I have the car on dealership waiting for clutch replacement , I need to decide asap on what to do. I do care mostly on pedal stiffness as I'm really bothered from a strong & stiff feeling the upgraded clutches has.
thx

Our clutch kits will have a stock pedal effort since we use a new technology that adjusts the fulcrum point of the pressure plate rather than using a heavier/stiffer pressure plate to increase clamping force. Many people have purchased these kits from us and have been very happy with the stock pedal effort and not chatter upon engagement.
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      11-12-2009, 10:41 AM   #188
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have you had your turbo kit on an auto and if so are you limiting it to a stage since you dont have a transmission cooler yet.
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      11-12-2009, 10:49 AM   #189
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Quote:
Originally Posted by marconi118 View Post
ASR please another 3 questions about your turbos:

1) what is the max PSI they can produce safely until redline, lets say 6.5Krpm?
2) what is the increase of flow (%) and efficiency compared to OEM turbos?
(is the compressed air temperature lower than OEM turbos?)
3) is the turbo lag increased and when is the full boost achieved (rpm)?

Turbo upgrade is always a trade off between power at high rpm and turbo lag + torque at low rpm
1) The boost level remains the same all the way to redline and does not fall off like the stock turbos. Max boost level is dependant on what Stage file the car is being run on. Stage 1 (15-16psi) Stage 2 (18psi) Stage 3 (20psi)
2) The increase of flow over stock turbos averages to about 38%. We noticed that with our turbo upgrades the factory fuel system's capabilities are increased due to increased cylinder efficiency. The stock turbine just does not have the exhaust gas exducing capability at higher boost levels as our TT upgrades do.
3) Turbo lag is not increased at all with our upgrades. As a matter of fact Shiv and I both agree that these turbos are actually more responsive than the stock turbos. The trade offs your speaking of are usually based on much larger turbo upgrades or even twin to single turbo conversions.
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      11-12-2009, 10:54 AM   #190
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Quote:
Originally Posted by psu139 View Post
have you had your turbo kit on an auto and if so are you limiting it to a stage since you dont have a transmission cooler yet.
We have not put our turbo upgrades on an A/T as of yet. The information we gave before is based on solid data we've collected in regards to the capabilities and limitations of the factory A/T transmission. Although, I think you may have mis-understood me in regards to the transmission oil cooler. I would recommend an oil cooler for all stages to increase reliability, not just Stage III.
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      11-12-2009, 10:57 AM   #191
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Quote:
Originally Posted by asr engineering View Post
Our clutch kits will have a stock pedal effort since we use a new technology that adjusts the fulcrum point of the pressure plate rather than using a heavier/stiffer pressure plate to increase clamping force. Many people have purchased these kits from us and have been very happy with the stock pedal effort and not chatter upon engagement.
Would it be possible for you to disclose a price for such a clutch kit? Sounds great if it can be engaged with stock pedal effort, since that's what has always been bothering me with the upgraded clutches that I'm aware of on the market.

Alpina_B3_Lux
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      11-12-2009, 11:11 AM   #192
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Quote:
Originally Posted by Alpina_B3_Lux View Post
Would it be possible for you to disclose a price for such a clutch kit? Sounds great if it can be engaged with stock pedal effort, since that's what has always been bothering me with the upgraded clutches that I'm aware of on the market.

Alpina_B3_Lux
Sorry, not possible to post that on this forum since we have to abide by forum rules.
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      11-12-2009, 12:09 PM   #193
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But you could give them a call Alpina
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      11-12-2009, 12:54 PM   #194
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Originally Posted by jpsimon View Post
But you could give them a call Alpina
I know that, and I'll do that anyway once I'm getting more serious with a turbo upgrade. However, I asked the question here as I believe that this may interest not only myself.

Would be cool if ASR decided to get vendor status here, but I think we're not there yet.

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      02-25-2010, 06:33 PM   #195
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Quote:
Originally Posted by asr engineering View Post
Sorry, not possible to post that on this forum since we have to abide by forum rules.
Has this project been canceled? IF not please give update.
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      02-25-2010, 06:48 PM   #196
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Originally Posted by Htown09 View Post
Has this project been canceled? IF not please give update.

give them a call. I have their flywheel+clutch and oddjob has their clutch with a stock feel
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      02-25-2010, 11:51 PM   #197
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Has this project been canceled? IF not please give update.
Nope, I think everyone is just waiting for a review by someone we know outside of ASR themselves.
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      02-26-2010, 12:56 PM   #198
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Quote:
Originally Posted by klipseracer View Post
Nope, I think everyone is just waiting for a review by someone we know outside of ASR themselves.
I've posted this elsewhere... but they have sold the whole first set of 10... and about 3 weeks ago i placed my order for #9 of the second set of 10...

They are expected to show up early April i think, last i heard.... ... I probably wont have time to get them on till end of April.. but we'll see.. I'll be anxious, but only so many hours in the day, too many projects..etc...

They have my deposit and i have sent them cores...

now i'm trying to decide on a clutch !! act vs spec ..... i'm leaning toward spec... thinking most of the problems i've heard of are hopefully install problems or something.... i had an act on my rx-7 and loved it, but they make me nervous in that they aren't very specific about what it will hold.....

as i understand it....asr has been using the spec clutch and their turbos for over 10k miles both with no problems
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