Turbo manifold styles- Absurdflow lowmount vs ramhorn, which for maximum power?
#66
You know I have been looking and
In terms of spool and response I’m thinking this turbo would blow my 3071 away. Smaller turbo but should flow just as much, better bearings ceramic ball, better seals, light weight titanium turbine wheel forged and milled compressor wheel
http://www.full-race.com/store/turbo...258-turbo.html
Looks like I’t would be dam close to bolt on for my manifold and 3” V band downpipe comes with a well designed internal waste gate geometry in an investment cast stainless turbine housing.
Bob
In terms of spool and response I’m thinking this turbo would blow my 3071 away. Smaller turbo but should flow just as much, better bearings ceramic ball, better seals, light weight titanium turbine wheel forged and milled compressor wheel
http://www.full-race.com/store/turbo...258-turbo.html
Looks like I’t would be dam close to bolt on for my manifold and 3” V band downpipe comes with a well designed internal waste gate geometry in an investment cast stainless turbine housing.
Bob
#67
You know I have been looking and
In terms of spool and response I’m thinking this turbo would blow my 3071 away. Smaller turbo but should flow just as much, better bearings ceramic ball, better seals, light weight titanium turbine wheel forged and milled compressor wheel
http://www.full-race.com/store/turbo...258-turbo.html
Looks like I’t would be dam close to bolt on for my manifold and 3” V band downpipe comes with a well designed internal waste gate.
Bob
In terms of spool and response I’m thinking this turbo would blow my 3071 away. Smaller turbo but should flow just as much, better bearings ceramic ball, better seals, light weight titanium turbine wheel forged and milled compressor wheel
http://www.full-race.com/store/turbo...258-turbo.html
Looks like I’t would be dam close to bolt on for my manifold and 3” V band downpipe comes with a well designed internal waste gate.
Bob
#69
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See this thread here. Miata turbo EFR wankfest:
https://www.miataturbo.net/showthrea...489#post683489
https://www.miataturbo.net/showthrea...489#post683489
#70
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Did more slight tweaks tonight and got some measurements. No reason other than to bump my own pics & continue a hijack for my own potential customers reading this thread.
Equal length runners of 14.350", 240° bends
Twin Scroll equal length of 17.240", 3 of the runners have similar bend radius/amount, the #2 primary has about 40deg's more bend but it's a larger radius so it should cancel out somewhat.
A/C P/S next.
Equal length runners of 14.350", 240° bends
Twin Scroll equal length of 17.240", 3 of the runners have similar bend radius/amount, the #2 primary has about 40deg's more bend but it's a larger radius so it should cancel out somewhat.
A/C P/S next.
#71
Did more slight tweaks tonight and got some measurements. No reason other than to bump my own pics & continue a hijack for my own potential customers reading this thread.
Equal length runners of 14.350", 240° bends
Twin Scroll equal length of 17.240", 3 of the runners have similar bend radius/amount, the #2 primary has about 40deg's more bend but it's a larger radius so it should cancel out somewhat.
A/C P/S next.
Equal length runners of 14.350", 240° bends
Twin Scroll equal length of 17.240", 3 of the runners have similar bend radius/amount, the #2 primary has about 40deg's more bend but it's a larger radius so it should cancel out somewhat.
A/C P/S next.
Bob
#73
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Sure, i'd be good to know the turbo position. Can't hurt! I don't necessarily want to directly copy yours however, even if it works great.
AC PS version. 15.310" equal lengths but requires a fun IWG mount or EWG, and a lower radiator hose solution.
I think I'm done.
AC PS version. 15.310" equal lengths but requires a fun IWG mount or EWG, and a lower radiator hose solution.
I think I'm done.
#75
I just got thru remaking the lower radiator pipe solution. The heater core hard line fits better than how I had it and I finished it up so it looks like a custom casting.
Bob
#76
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I was just looking at mine and if I shift the turbo back not only does it interfere with the steering shaft it hits the sub frame. I remember now and even if you did manage to move it back there was no really clean way to rout piping from the compressor outlet. It was designed in 2004 and originally built it in 2005 so it's been a while but I spent a lot of time planning out and test fitting before I made it. I re-built at the beginning of 2008.
I just got thru remaking the lower radiator pipe solution. The heater core hard line fits better than how I had it and I finished it up so it looks like a custom casting.
Bob
I just got thru remaking the lower radiator pipe solution. The heater core hard line fits better than how I had it and I finished it up so it looks like a custom casting.
Bob
That above AC PS ramhorn puts it the same spot as my 'shortram' AC PS which I've only done one of and that was with a 2560. It fit with a decent amount of room however. I'm supposedly making a vband version of it (the short ram) with a 52T 2871 soon.
Without AC PS and a larger turbo, your manifold makes a lot of sense. The long BW EFR turbos should fit easily on yours
#77
Tim, was the 2560 setup for me much different that a 2871 or 3071 regarding runners, etc?
For those interested, Tim was able to allow me to keep A/C, PS, AND ABS. The ABS was a monkeywrench.
It might not be all pretty like the ARTech Ram Horn, but the power delivery is incredible! Braineack and some others have driven it. I'd totally go to Tim for future turboing. Except next time I'd get a 94-95 Miata so I don't have to deal with OBDII.
For those interested, Tim was able to allow me to keep A/C, PS, AND ABS. The ABS was a monkeywrench.
It might not be all pretty like the ARTech Ram Horn, but the power delivery is incredible! Braineack and some others have driven it. I'd totally go to Tim for future turboing. Except next time I'd get a 94-95 Miata so I don't have to deal with OBDII.
#78
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It's... beautiful! What do you think about leaving the collector divided with 1+2 on one side and 3+4 on the other to keep the pulses from 1 and 4 heading toward the turbine and not each other? Or placing the turbine flange further down to allow the runners to remain more separated through the turn?
#79
Your waterpump inlet looks pretty sweet! Nice job on that. Can I have one?
That above AC PS ramhorn puts it the same spot as my 'shortram' AC PS which I've only done one of and that was with a 2560. It fit with a decent amount of room however. I'm supposedly making a vband version of it (the short ram) with a 52T 2871 soon.
Without AC PS and a larger turbo, your manifold makes a lot of sense. The long BW EFR turbos should fit easily on yours
That above AC PS ramhorn puts it the same spot as my 'shortram' AC PS which I've only done one of and that was with a 2560. It fit with a decent amount of room however. I'm supposedly making a vband version of it (the short ram) with a 52T 2871 soon.
Without AC PS and a larger turbo, your manifold makes a lot of sense. The long BW EFR turbos should fit easily on yours
#80
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Tim, was the 2560 setup for me much different that a 2871 or 3071 regarding runners, etc?
For those interested, Tim was able to allow me to keep A/C, PS, AND ABS. The ABS was a monkeywrench.
It might not be all pretty like the ARTech Ram Horn, but the power delivery is incredible! Braineack and some others have driven it. I'd totally go to Tim for future turboing. Except next time I'd get a 94-95 Miata so I don't have to deal with OBDII.
For those interested, Tim was able to allow me to keep A/C, PS, AND ABS. The ABS was a monkeywrench.
It might not be all pretty like the ARTech Ram Horn, but the power delivery is incredible! Braineack and some others have driven it. I'd totally go to Tim for future turboing. Except next time I'd get a 94-95 Miata so I don't have to deal with OBDII.
Thanks for the props! I also worked around the cruise control even though I forgot to hook up a vacuum line and it never worked and you removed it instead :(
It's... beautiful! What do you think about leaving the collector divided with 1+2 on one side and 3+4 on the other to keep the pulses from 1 and 4 heading toward the turbine and not each other? Or placing the turbine flange further down to allow the runners to remain more separated through the turn?
But a thin sheet could be placed between each/any primary (make a cut with a band saw or cutoff wheel, slide in a .060 sheet, weld from outside) for more "flow directing" but IMHO if anything i'd make it worse not better. Then again it could work great, don't really know until it's tried.