Magnex to Super Drager
01 February 2004, 05:34 PM
#4
I wouldn't say the Drager has much more flow... the Hyper maybe. Do you have any info to back that statement up, be interested in it if you do.
Tony.
P.s i wouldn't fit the HKS downpipe... stick with the Magnex. The HKS has just a blank behind the wastegate outlet.
Tony.
P.s i wouldn't fit the HKS downpipe... stick with the Magnex. The HKS has just a blank behind the wastegate outlet.
01 February 2004, 08:25 PM
#6
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If that's me about the info bit - I've never used a Hyper (too noisy) so compare those two, but I have compared a run with a Drager mated to a BPM DP (so also 3") with a 'typical' 2.5" system on the same DP. I think I've deleted the graphs now, but... nope, here we go!
Before you ask, I can't remember what the spec of the car was at the time, other than there were definitely HKS headers on there, which you can tell from the power increase from 4,200rpm, that being only noticeable on the 3" system. Read into that what you will
Before you ask, I can't remember what the spec of the car was at the time, other than there were definitely HKS headers on there, which you can tell from the power increase from 4,200rpm, that being only noticeable on the 3" system. Read into that what you will
01 February 2004, 08:29 PM
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I've just remember something that was mentioned last time I put this up so will account for it now -
The power run started at a different rpm on each run, so don't read anything into th low power at the bottom end on the 3" system. Also, I was actually trying to look at the 4-6k area, so I didn't carry on past 6k. It probably would have been rather useful to have done so for the purpose of showing flow, but my high rpm stuff wasn't on a flat bit of road (I prefer going up a particular very steep hill to put load on the engine & use a lower gear - makes the speeds slightly less unnerving
)
The power run started at a different rpm on each run, so don't read anything into th low power at the bottom end on the 3" system. Also, I was actually trying to look at the 4-6k area, so I didn't carry on past 6k. It probably would have been rather useful to have done so for the purpose of showing flow, but my high rpm stuff wasn't on a flat bit of road (I prefer going up a particular very steep hill to put load on the engine & use a lower gear - makes the speeds slightly less unnerving
)
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01 February 2004, 11:36 PM
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I have no idea about what the bhp would be - I'm not convinced it means much one car against another anyway . Something that has come to me is that the above was running a vf23 hybrid of sorts, and remember that the above figures (if you believe figures at all) are ATW rather than fly.
'Typical' 2.5" - 2.5" straight-through following the standard bends. No centre cat or resonator, backbox was of the non-baffly type but I'm not sure which one. Probably one of the TSL variants. 'm generalising here 'cos from the minimal testing I've done of the various 2.5" systems, if all straight-through their perfomance varies very little in 'real' terms - as in it's piddling about with a couple of hp. Big stuff 
. Now, throw in a 'standard' one that bounces the flow all over the place & that's a different matter!
And the runs were on the same afternoon, about an hour apart, on exactly the same bit of road, so I'd say are very consistent, although I wouldn't put too much faith in the size of the horse involved in the testing
[Edited by nom - 2/1/2004 11:38:02 PM]
. Something that has come to me is that the above was running a vf23 hybrid of sorts, and remember that the above figures (if you believe figures at all) are ATW rather than fly.'Typical' 2.5" - 2.5" straight-through following the standard bends. No centre cat or resonator, backbox was of the non-baffly type but I'm not sure which one
. Probably one of the TSL variants. 'm generalising here 'cos from the minimal testing I've done of the various 2.5" systems, if all straight-through their perfomance varies very little in 'real' terms - as in it's piddling about with a couple of hp. Big stuff . Now, throw in a 'standard' one that bounces the flow all over the place & that's a different matter! And the runs were on the same afternoon, about an hour apart, on exactly the same bit of road, so I'd say are very consistent, although I wouldn't put too much faith in the size of the horse involved in the testing
[Edited by nom - 2/1/2004 11:38:02 PM]
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