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 8604 Posts Member #: 573 Formerly Axel Podland |
19th Apr, 2007 at 11:52:50am
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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194 Posts Member #: 1296 Advanced Member Milford Haven Pembrokeshire |
19th Apr, 2007 at 10:13:12pm
Alex, were following a very similar route!
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8604 Posts Member #: 573 Formerly Axel Podland |
20th Apr, 2007 at 12:38:06pm
On 19th of Apr, 2007 at 10:13pm mini23 said:
Alex, were following a very similar route! I've mounted my inlet throttle bodies on home made manifolds which will carry a number of injectors. Met up with bill schurvington last night to finalize the set up of the megasquirt. We discussed a modification to the code that will control the throttle body bypass by looking at the manifold pressure and tps and using a fly by wire throttle positioner. Bill is a great help. He has set up my MS2 ready to be converted to the extra code with the minimal soldering. The MS2 is currently just running the ignition on my NA 1275 which I plan on using to help develop the siamesed port code. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 6752 Posts Member #: 828 Post Whore uranus |
20th Apr, 2007 at 01:57:08pm
On 19th of Apr, 2007 at 10:55am Axel said:
I'm using the Eaton M45 and the GT1752. Both cheap and readily available. They both sit at their peak efficiency at the peak air flows. Hence will require minimal intercooling. The supercharger will provide boost from idle with the turbo coming in at higher revs. Front mounted supercharger under a clubman front, turbo in the normal position. Biggest problems are the blower drive and pistons for the 30 psi boost. The design is complete and the bits are accumalating. Just need time to get everything else out of the way, but hope to compete at Avon 2008. run the calcs on an air temp formula axel ,and do it stage one outlet temp then take the st 1 and feed it through the st 2 and step up the st 1 outlet temp by the increase going thruogh st2 ,and .... put a big intercooler on it  
other thing is , try to source a big a/r for the 17 turbine , i think you might need it ,its got to pass a lot of gas , i ended up with 2 wastegates on the tvr to bypass the small 2nd stage ,other wize high turbine pressure may result , till its running you wont really know ,comes back a bit to the open wheel design on the 17 and how it passes a lot of air,it may be ok , oh ,also i think youll find the turbo start to create boost much earlier than you expect ,cos the blower is going to increase the volume of your ex gas substantially , i know the tvr with the small 2nd stage on it created enough gas to cause the huge holset to make 8 psi by 4k...without the 2nd stage it makes about 2 psi at the same point and only 5 psi at 6k ,this would all also apply to peters and any other 2 stage setup . regards robert Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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8604 Posts Member #: 573 Formerly Axel Podland |
20th Apr, 2007 at 03:56:03pm
On 20th of Apr, 2007 at 01:57pm robert said:
run the calcs on an air temp formula axel ,and do it stage one outlet temp then take the st 1 and feed it through the st 2 and step up the st 1 outlet temp by the increase going thruogh st2 ,and .... I've done the calcs and adjusted the volume flow for the density change through the various stages etc. I've looked at both options and the dual intercooler route is the way forward. Without the first intercooler you will need a larger blower, and one large intercooler is not going to be as efficient as two small ones. I'm planning on stackting two 2WD cossie intercoolers at the front. So turbo in the normal place, pipe over the top, as normal, to feed the first intercooler. Outlet from IC into blower mounted in the alternator position. Out of blower into second IC and then back over to the TB and plenum. I'm looking into driving the alternator off the free end of the blower - where the Bini water pump is driven. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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6752 Posts Member #: 828 Post Whore uranus |
20th Apr, 2007 at 07:01:18pm
that sounds good i was just concerned by your minimal intercooling comment lol Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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8604 Posts Member #: 573 Formerly Axel Podland |
20th Apr, 2007 at 07:07:47pm
On 20th of Apr, 2007 at 07:01pm robert said:
that sounds good i was just concerned by your minimal intercooling comment lol Ah, right. I meant that because the turbo and blower are operating at the peak of their adiabatic efficiency, there will be the minimum heat added to the air. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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194 Posts Member #: 1296 Advanced Member Milford Haven Pembrokeshire |
20th Apr, 2007 at 08:58:13pm
Not sure which code i'll use yet, but again as Alex I want to be there for the siamese code when its ready.
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8604 Posts Member #: 573 Formerly Axel Podland |
20th Apr, 2007 at 09:01:31pm
On 20th of Apr, 2007 at 08:58pm mini23 said:
Not sure which code i'll use yet, but again as Alex I want to be there for the siamese code when its ready. I'm considering using the GT28RS 'disco potato', which may seem well over sized but the map fits. Alex do you already have the charger? You'll need something like the GT28 if you are using a 1275 or bigger. The GT1752 and M45 are spot on for the 998. And, yes I already have the M45. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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