With highflow twins (TURBO TECHNICS), front mount, water injection and all the correct fueling, whats the best bhp you can get fron a std unported engine.
Quote from: davyvWith highflow twins (TURBO TECHNICS), front mount, water injection and all the correct fueling, whats the best bhp you can get fron a std unported engine.
I was getting 320 at the rear wheels on stock twins, with fmic and w i and fuelling at around 1.0 Bar. Turbos didn\'t last very long though
:2eek
Wow, thats a great power figure strange days! no wonder the turbos shot quick though lol. How long did they last out of interest?
Why not go with a small single? I have a Garrett T04E on a cast manifold. There isn\'t much difference between in lag between my T04E and stock twins time you have the front mount on there. Its a nice lil turbo to run around town on.
I run 316atw @1bar on stock twins and fueling without wi and fuel cut at 5300rpm :Laugh
When its rebiult again it should be pushing another 40hp i hope. Adding fueling and a few other bits & bobs ;)
Quote from: McCARTHYWhy not go with a small single? I have a Garrett T04E on a cast manifold. There isn\'t much difference between in lag between my T04E and stock twins time you have the front mount on there. Its a nice lil turbo to run around town on.
Where is one to find these "cast" manifolds?
Surely the Highflow twins are stronger too, rather than just flowed??
Thats my assumption, without knowing there specs. If I was flowing the turbos, I would be doing what I could to make them stronger.
Hi flow twins are just that - stock twins refurbed, bigest restriction to getting more power out of the twin rotor engine is the twin turbo setup due to the way the are made you hit to many restrictions, more boost / flow you try to push through them the more heat they generate the more inifficient they become, stop wasting money and heartache accept the twin turbo setup has a ceiling [320ish safely]
Quote from: John YorkeHi flow twins are just that - stock twins refurbed, bigest restriction to getting more power out of the twin rotor engine is the twin turbo setup due to the way the are made you hit to many restrictions, more boost / flow you try to push through them the more heat they generate the more inifficient they become, stop wasting money and heartache accept the twin turbo setup has a ceiling [320ish safely]
but remember what the re amemiya cars can do with the seq turbo setup!! for road race its very hard to beat!
I tend to agree... While there are limitations on what a turbo can flow. You can also build it stronger too.
Internet descriptions dont help things. Highflow turbos dont have to mean just that.
Put it this way, I dont see any twin turbos comming past me, been there done that, best you will see is 320ish atw, have run BNR\'s, uprated stocks - seq and non seq you are dreaming if you expect any more and run a safe map
These are some specs on a set of uprated twin im expecting a delivery of in comparison to stock, im told they are good for upto 1.4 bar. They are more than enough for me but decide for yourself.
Knightsports RF420 twins, good for 420ps (415 hp)
Knightsports
Major(compressor) 60.1MM
Inducer 47.4MM
Bearing 9.17MM
Major(shaft) 5.96MM
Inlet Size 46.8MM
Stock
Major(compressor) 57.0MM
Inducer 42.1MM
Bearing 7.75MM
Major(shaft) 4.97MM
Inlet Size 42.55MM
Quote from: John_HudsonThese are some specs on a set of uprated twin im expecting a delivery of in comparison to stock, im told they are good for upto 1.4 bar. They are more than enough for me but decide for yourself.
Knightsports RF420 twins, good for 420ps (415 hp)
Knightsports
Major(compressor) 60.1MM
Inducer 47.4MM
Bearing 9.17MM
Major(shaft) 5.96MM
Inlet Size 46.8MM
Stock
Major(compressor) 57.0MM
Inducer 42.1MM
Bearing 7.75MM
Major(shaft) 4.97MM
Inlet Size 42.55MM
Nice spec, they are still twins with the same restrictions, will make the same heat, and cooling will be an issue, would love to see twins make that power...for real;) , just so as you know the Border car that ran at Thor on the dynoday was running 2 single turbos made 425 they were like 2 TO4e\'s in size.
Best of luck with your project I will look forward to your results.
so whats the power diffference to stock twins to stock non seq twins??
wouldn\'t have thought there would be any differance. just in the delivery but could be wrong
Some people claim improved power from seq twins, think most of it is the big surge in power at about 5k when the turbos kick in together, put them on the dyno and you will see no difference to stock, maybe a touch from porting the wastegate.
John Hudson:
What spec engine are you fitting these twins to? What are you doing to support this 1.4bar, that is a lot of boost for twins, The Hog ran his stock twins at 1.4, they lasted a couple of months and he had all the bits in place:rolleyes: Like I said run twins at more than a bar and you will have issues, there are much better ways of getting to the magic 400+
i want to be at a safe 350 atw, mods are pfc 3" decat exhaust trust DP, apexi GT FMIC uprated alloy rad, profec b spec 2 boost controller, sard FPR 850 injectors all around apexi intake err cant remember anymore its to late... early.. damn night shifts :p
on a standard engine but that wont be like that for to long
i also wont be running high boost on stock twins, it will be on the knightsports 420\'s
Without being argumentative, surely "flowed twins" should remove some restrictions in the turbo system... Bare in mind I am saying some, so I could understand people saying the delivery can be a little different.
However IMO if you are providing flowed twins, they should be built to a higher spec. Which in theory will allow a marginal increase in boost, while still keeping the turbos in a relative "safety zone".
John I do understand what your saying though. With out direct experience of modified stock twins, I cannot claim any factual evidence, im more thinking aloud.
Does anyone have further details on boost pressures for the stock twins along with likely output (HP).
From this thread, and similar and my own experience to date:
280atw+ @ 0.8bar
300atw @ 0.9bar
320atw @ 1bar
.
.
380atw @ 1.3bar(http://img133.exs.cx/img133/6927/explotar2jr.gif)
Quote from: Neil_MWithout being argumentative, surely "flowed twins" should remove some restrictions in the turbo system... Bare in mind I am saying some, so I could understand people saying the delivery can be a little different.
However IMO if you are providing flowed twins, they should be built to a higher spec. Which in theory will allow a marginal increase in boost, while still keeping the turbos in a relative "safety zone".
John I do understand what your saying though. With out direct experience of modified stock twins, I cannot claim any factual evidence, im more thinking aloud.
Does anyone have further details on boost pressures for the stock twins along with likely output (HP).
Its not the turbos so much as the integral wastegate that is the cause, more boost you push through the restriction [read wastegate] the more heat is produced the less productive the turbo\'s become, yes you can run 1.3 but they dont last long, BNR\'s Knightsports ect still run through the same system and yes you will see gains but its not an effective way of tuning, just look at all the rotaries in the UK that run over 320 99.9% are singles, twin singles now that is something worth looking at and with the twins you are still reliant on that wonderfull rats nest:eek:
Dont know how much you are paying for these Knightsport turbos but me, I would be looking at running them seq. and porting out the the wastegate manifold you wont see the early boost but will have more usable power, running them on a stock engine wont see the power you are hoping for, 850\'s all round may not be enough fuel for 350 either. Hth
they will be converted to full non seq.
price for the turbo\'s are 600 including shipping but excluding import tax