Brettus turbo 111 (the ultimate Renesis turbo ?)
#426
Correct ... so what ? Talk to me again in a few weeks on that one.
#427
Registered
iTrader: (4)
Brett
Not to pile on, I know it can be very stressful when a project doesn't go as planned. Why did you dismiss the 3571/3576? Not enough top end power? I am not suggesting you change turbo at this point, I am just curious about the other option for those who aren't interested (or capable!) of following in your manifold creating, Siamese port waste gate building footsteps.
Thanks
Not to pile on, I know it can be very stressful when a project doesn't go as planned. Why did you dismiss the 3571/3576? Not enough top end power? I am not suggesting you change turbo at this point, I am just curious about the other option for those who aren't interested (or capable!) of following in your manifold creating, Siamese port waste gate building footsteps.
Thanks
#429
Brett
Not to pile on, I know it can be very stressful when a project doesn't go as planned. Why did you dismiss the 3571/3576? Not enough top end power? I am not suggesting you change turbo at this point, I am just curious about the other option for those who aren't interested (or capable!) of following in your manifold creating, Siamese port waste gate building footsteps.
Thanks
Not to pile on, I know it can be very stressful when a project doesn't go as planned. Why did you dismiss the 3571/3576? Not enough top end power? I am not suggesting you change turbo at this point, I am just curious about the other option for those who aren't interested (or capable!) of following in your manifold creating, Siamese port waste gate building footsteps.
Thanks
It all depends on your goals and where/how you want to mount it ..... wouldn't like to discount either of those you mentioned without knowing that.
#434
This is how I plan to dramatically improve spoolup :
By joining the Siamese port to the front rotor tube .... this should happen at spoolup .
So more than double the energy through the front runner + slightly less energy through the rear runner = huge improvement in spoolup.
Once the wastegate opens fully all the siamese pulses will disappear.
By joining the Siamese port to the front rotor tube .... this should happen at spoolup .
So more than double the energy through the front runner + slightly less energy through the rear runner = huge improvement in spoolup.
Once the wastegate opens fully all the siamese pulses will disappear.
Last edited by Brettus; 08-07-2015 at 12:46 PM.
#436
This has been posted before but iirc it was a different setup. If you could fit this in between the manifold and turbo it could be cheaper than modifying the exhaust manifold...
This then puts the flow from both rotors to one side of the twin scroll to spool and opens up as boost increases. I think you were against this idea though iirc... Never mind me. Just another BS post...
This then puts the flow from both rotors to one side of the twin scroll to spool and opens up as boost increases. I think you were against this idea though iirc... Never mind me. Just another BS post...
#438
#439
There may also be a negative impact on wastegate efficiency. But it is so good now , i doubt it will make any difference .
Last edited by Brettus; 08-07-2015 at 06:09 PM.
#440
This has been posted before but iirc it was a different setup. If you could fit this in between the manifold and turbo it could be cheaper than modifying the exhaust manifold...
This then puts the flow from both rotors to one side of the twin scroll to spool and opens up as boost increases. I think you were against this idea though iirc... Never mind me. Just another BS post...
This then puts the flow from both rotors to one side of the twin scroll to spool and opens up as boost increases. I think you were against this idea though iirc... Never mind me. Just another BS post...
Last edited by Brettus; 08-07-2015 at 04:32 PM.
#441
it should have a similar effect, I was thinking it would be cheaper and easier than modifying the manifold to get where you want to be. You could keep the wastegate where it is because you know it operates as you want, you proved that one. you'd still have the issue of the volume of the centre though. So really, the manifold modification to your centre pipe would kill 2 birds with one stone, so it's all good.
Last edited by shambo; 08-07-2015 at 04:35 PM.
#442
it should have a similar effect, I was thinking it would be cheaper and easier than modifying the manifold to get where you want to be. You could keep the wastegate where it is because you know it operates as you want, you proved that one. you'd still have the issue of the volume of the centre though. So really, the manifold modification to your centre pipe would kill 2 birds with one stone, so it's all good.
#443
it should be alot better, and if you're keeping the wastegate on the centre ports it should stay very controllable.
#444
Pre turbo AI was only a minor consideration so don't think that was what my decision was based on . It's just something I've read a lot about and thought it might be an interesting thing to try.
Going to the cast wheel was all about the top end efficiency (at my target boost ) of the GTX3576 vs the GT3582 . You posted the maps earlier so I'm sure you are fully aware of the difference.
#446
No respecter of malarkey
iTrader: (25)
Just want to address this for the sake of discussion .
Pre turbo AI was only a minor consideration so don't think that was what my decision was based on . It's just something I've read a lot about and thought it might be an interesting thing to try.
Going to the cast wheel was all about the top end efficiency (at my target boost ) of the GTX3576 vs the GT3582 . You posted the maps earlier so I'm sure you are fully aware of the difference.
Pre turbo AI was only a minor consideration so don't think that was what my decision was based on . It's just something I've read a lot about and thought it might be an interesting thing to try.
Going to the cast wheel was all about the top end efficiency (at my target boost ) of the GTX3576 vs the GT3582 . You posted the maps earlier so I'm sure you are fully aware of the difference.
#447
The reason I haven't done the video 9k asked for is that it isn't that impressive IMO. However ,how about waiting till this design change is done and tested before passing your final judgement over all my "poor choices" ?
Also ...............why won't you 'draw a line in the sand' over what you would consider a success in regards to spoolup ?
BTW I do realise that I set myself up for this kind of scrutiny by choosing such a provocative thread title .
Last edited by Brettus; 08-08-2015 at 05:02 PM.
#448
Am waiting for him to give me a price tomorrow . But it is booked in this week anyway .... whatever the price................. LOL
Will also be getting a few other things addressed at the same time :
*Refitting my old polyurethane engine mount - he fitted his own design which I questioned at the time and have found wanting.
*Fitting a driveshaft loop - a requirement for certification of modified cars here .
*More heat shielding of the intake pipes as cruise AITs are higher than on my previous setup.
Will also be getting a few other things addressed at the same time :
*Refitting my old polyurethane engine mount - he fitted his own design which I questioned at the time and have found wanting.
*Fitting a driveshaft loop - a requirement for certification of modified cars here .
*More heat shielding of the intake pipes as cruise AITs are higher than on my previous setup.
Last edited by Brettus; 08-08-2015 at 04:36 PM.
#449
Why I didn't choose an EFR 8374 ???????
This keeps getting thrown back at me so I want to specifically address it .
If you were to ask "what is THE BEST turbo for quick spool and 4-500 whp for our engines " I would say without question, that the above turbo wins hands down . Even though no-one to date has even fitted one .
I looked at using it and decided against for a number of reasons that stemmed from the fact that I specifically wanted a low mount setup.
The main aim of the project was not only to make a system capable of 400whp but to also keep the engine happy while doing it (whilst getting Greddy like spoolup ) and thus create a viable alternative to an REW swap. To just slap on a big turbo has been tried before on many occasions . How many 400+whp Renesis engines are out there surviving this on a daily basis ? None that I am aware of . So I felt the need to try something different, hence the siamese wastegate idea.
From the pics it is obvious that the turbo I chose is extremely cramped already so here are the size considerations that excluded the EFR :
It's very long
Both housings are large in diameter
It has a BOV and a WG actuator hanging off it
It uses the very large T4 flange
It has a 4" intake (we couldn't even get a 3" to fit let alone a 4")
Also:I have a steering column to contend with
As I have said before , if someone actually ever manages to fit one AND achieve what I set out to do here , I will be the first to congratulate them.
We know the 8374 would fit as a topmount so why wouldn't that be the "ultimate" ?
Maybe it would be in terms of spoolup and peak power and dare I say it ...bling .
But :
Will the engine last , will this turbo be any better at overcoming the Renesis weaknesses than any other big turbo ?
What is the compromise to to handling having all that weight up high ?
How long will everything last that is in close proximity to all that heat ?
What other compromises are made in getting all those hot pipes past the OMP,APV and ECU ?
Then again ..... maybe it wont have any better spoolup than what i'm doing.............................
If you were to ask "what is THE BEST turbo for quick spool and 4-500 whp for our engines " I would say without question, that the above turbo wins hands down . Even though no-one to date has even fitted one .
I looked at using it and decided against for a number of reasons that stemmed from the fact that I specifically wanted a low mount setup.
The main aim of the project was not only to make a system capable of 400whp but to also keep the engine happy while doing it (whilst getting Greddy like spoolup ) and thus create a viable alternative to an REW swap. To just slap on a big turbo has been tried before on many occasions . How many 400+whp Renesis engines are out there surviving this on a daily basis ? None that I am aware of . So I felt the need to try something different, hence the siamese wastegate idea.
From the pics it is obvious that the turbo I chose is extremely cramped already so here are the size considerations that excluded the EFR :
It's very long
Both housings are large in diameter
It has a BOV and a WG actuator hanging off it
It uses the very large T4 flange
It has a 4" intake (we couldn't even get a 3" to fit let alone a 4")
Also:I have a steering column to contend with
As I have said before , if someone actually ever manages to fit one AND achieve what I set out to do here , I will be the first to congratulate them.
We know the 8374 would fit as a topmount so why wouldn't that be the "ultimate" ?
Maybe it would be in terms of spoolup and peak power and dare I say it ...bling .
But :
Will the engine last , will this turbo be any better at overcoming the Renesis weaknesses than any other big turbo ?
What is the compromise to to handling having all that weight up high ?
How long will everything last that is in close proximity to all that heat ?
What other compromises are made in getting all those hot pipes past the OMP,APV and ECU ?
Then again ..... maybe it wont have any better spoolup than what i'm doing.............................
Last edited by Brettus; 08-10-2015 at 01:31 AM.