WHAT IS BEST 480-500BHP TURBO?
18 March 2009, 08:29 PM
#31
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when you getting it on the dyno to find out? would be interesting to see results
18 March 2009, 10:45 PM
#32
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Martyn, would be very interested to see the result on the MD555/2.5 when you get it sorted. Presumably the compressor housing is slightly larger than mine
Here's my dyno result for MD555 on 2.35 (new age JDM STI).
Here's my dyno result for MD555 on 2.35 (new age JDM STI).
19 March 2009, 07:46 AM
#34
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To the best of my knowledge Jay, they have the same housing but the one I am trying has the larger 3076 comp wheel and a GT32 exhaust wheel. I will of course let you know how we get on.
19 March 2009, 01:40 PM
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19 March 2009, 02:39 PM
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Mind you, this car does 20k a year as a daily driver
19 March 2009, 05:27 PM
#39
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Jay,
Does the boost drop off after 5000 or is it steady? The peak power is quite a bit before what one may expect.... maybe down to the fact that it is running too much boost at the top end and bringing the peak power figure to the left?
Does the boost drop off after 5000 or is it steady? The peak power is quite a bit before what one may expect.... maybe down to the fact that it is running too much boost at the top end and bringing the peak power figure to the left?
19 March 2009, 06:10 PM
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Shaun, that had occurred to me about boost. However, there's some history here...
The car had been mapped at 2.1 bar initially and that made less power than shown above (455 IIRC). I then changed mappers over to Simon who reduced boost and was dyno mapping so could see effects of boost changes whilst mapping. He's tweaked the car a few times now and is happy that 1.9 bar is optimum for the setup. Reducing boost below that doesn't generate more power.
You may be right that running say 1.6 bar would produce peak power further up the revs, but this would be lower power and less torque overall. As it is, the mid-range is very punchy and usable.
Duncan, there are two sets of curves on the graph above... the lower one is straight V Power, then we did a 10% meth map on the same day. So yes, they are directly comparable. Both are at 1.9 bar and are very similar curves.
Sorry OP if we're hijacking
The car had been mapped at 2.1 bar initially and that made less power than shown above (455 IIRC). I then changed mappers over to Simon who reduced boost and was dyno mapping so could see effects of boost changes whilst mapping. He's tweaked the car a few times now and is happy that 1.9 bar is optimum for the setup. Reducing boost below that doesn't generate more power.
You may be right that running say 1.6 bar would produce peak power further up the revs, but this would be lower power and less torque overall. As it is, the mid-range is very punchy and usable.
Duncan, there are two sets of curves on the graph above... the lower one is straight V Power, then we did a 10% meth map on the same day. So yes, they are directly comparable. Both are at 1.9 bar and are very similar curves.
Sorry OP if we're hijacking
21 March 2009, 02:13 AM
#43
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Mark, LATERAL PERFORMANCE,
I have kind of come around to the same idea as you about rods and turbo, what would be a more realistic bhp and torque figure for me considering i havent done the rods?
I see BLOUCH doing some DOMINATOR turbos, think there is a 470 and a 490 bhp one.
I want as quick a 1\4 mile car as i can get basically, that still has the back road punch and response of the standard classic
I have kind of come around to the same idea as you about rods and turbo, what would be a more realistic bhp and torque figure for me considering i havent done the rods?
I see BLOUCH doing some DOMINATOR turbos, think there is a 470 and a 490 bhp one.
I want as quick a 1\4 mile car as i can get basically, that still has the back road punch and response of the standard classic
21 May 2009, 02:07 PM
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as far as i have seen on snet there is only one car running 500 + on these md based turbos, dosn't say much as I haven't seen any under 500 either
wont find out anything with mine till after june 13th
21 May 2009, 02:52 PM
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me2
i just wanted to check as ive spoken to a mate of mine and he told me the the s206 wil require a diffrent up pipe and down pipe il double check with martyn and alan.
21 May 2009, 04:40 PM
#48
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Last edited by Fat Boy; 21 May 2009 at 04:42 PM.
21 May 2009, 08:21 PM
#50
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Figures for the 2.5 on the S206 are on their way, but we were reluctant to push it too much as the customer is off to the Nurburgring tomorrow.
So far we are seeing 430bhp and 500lbft @ 1.5 bar boost on Sainsburys 97ron fuel.
The owner will be delivering it back to us when he gets back and then we will be trying it with more boost, and then a 10% methanol mix to see what it makes.
Martyn
22 May 2009, 12:37 AM
#52
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Very true Duncan, although the modification to fit isn't beyond any half decent exhaust manufacturer. We can supply the downpipe ready made as an optional extra should customers prefer.
The 2.5 Classic we have been testing was quite something on road test, especially considering the stock UK Turbo heads and cams. A brief test proved that 2 bar plus can be made before 3500rpm without any surge.
The 2.5 Classic we have been testing was quite something on road test, especially considering the stock UK Turbo heads and cams. A brief test proved that 2 bar plus can be made before 3500rpm without any surge.
22 May 2009, 12:48 AM
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Very true Duncan, although the modification to fit isn't beyond any half decent exhaust manufacturer. We can supply the downpipe ready made as an optional extra should customers prefer.
The 2.5 Classic we have been testing was quite something on road test, especially considering the stock UK Turbo heads and cams. A brief test proved that 2 bar plus can be made before 3500rpm without any surge.
The 2.5 Classic we have been testing was quite something on road test, especially considering the stock UK Turbo heads and cams. A brief test proved that 2 bar plus can be made before 3500rpm without any surge.
that will make one naughty classicp.s banny start saving two reason you obviously know why
22 May 2009, 08:29 AM
#54
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Martyn, please can you post the torque v boost graph showing 500ftlbs @ 1.5bar.
22 May 2009, 09:40 AM
#55
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Will hopefully get my hands on my dyno graph from my set-up, when it was mapped and run last week on Tracktives HUB dyno. The turbo (AET standard position/bolt on) enabled the engine to make 486bhp/515ftlb at the HUBS on VPower.
Will post when I get my hands on it.
Will post when I get my hands on it.
22 May 2009, 10:53 AM
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[QUOTE=Lateral Performance;8718763]If anything, STi4 cams will spool later, not earlier.
arent sti heads better than uk heads? magic seven had an 18G on his uk terzo and he got full boost on the road by 4300rpm while ki8lla on his sti 3 type r got full boost by 3500 on the road maybe before. both had exactley the same mods. from my understanding i thought sti heads spooled earleir and revved better cause they flow more
arent sti heads better than uk heads? magic seven had an 18G on his uk terzo and he got full boost on the road by 4300rpm while ki8lla on his sti 3 type r got full boost by 3500 on the road maybe before. both had exactley the same mods. from my understanding i thought sti heads spooled earleir and revved better cause they flow more
Last edited by Mus; 22 May 2009 at 07:13 PM.
22 May 2009, 06:56 PM
#57
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heres a graph of scoobyclinic's SC50 (bolt on turbo) on a ej257 with rods and pistons with standard sti 5 heads, running v-power and 10% meth
clinic chucked the engine together 3 days before scooby shootout in 2007 and it ran 11.0 @ 127mph, would of gone 10's if the PAR box had'nt broken
clinic chucked the engine together 3 days before scooby shootout in 2007 and it ran 11.0 @ 127mph, would of gone 10's if the PAR box had'nt broken
Last edited by mikeesingh; 22 May 2009 at 07:02 PM. Reason: spelling
22 May 2009, 07:01 PM
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[QUOTE=mus 1st class sti type r;8718996]
It wasn't really a accurate comparison, I had heavily ported headers as well as a completely different engine management setup
If anything, STi4 cams will spool later, not earlier.
arent sti heads better than uk heads? magic seven had an 18G on his uk terzo and he got full boost on the road by 4300rpm while ki8lla on his sti 3 type r got full boost by 3500 on the road maybe before both had exactley the same mods. from my understanding i thought sti heads spooled earleir and revved better cause they flow more
arent sti heads better than uk heads? magic seven had an 18G on his uk terzo and he got full boost on the road by 4300rpm while ki8lla on his sti 3 type r got full boost by 3500 on the road maybe before both had exactley the same mods. from my understanding i thought sti heads spooled earleir and revved better cause they flow more
22 May 2009, 07:34 PM
#59
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[QUOTE=K18LLR;8719923]
ok what about my car i had a 20G on there with exactly the same mods and that was b4 i used meth i was seen full boost at 3800 in 3rd gear while magics uk terzo was seen it at 4300 maybe later and he had an 18G which is smaller turbo than my 20G?? oh yes and he was also using meth and water mix.
and he had an 18G which is smaller turbo than my 20G?? oh yes and he was also using meth and water mix.
Last edited by Mus; 22 May 2009 at 07:35 PM.
22 May 2009, 07:39 PM
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heres a graph of scoobyclinic's SC50 (bolt on turbo) on a ej257 with rods and pistons with standard sti 5 heads, running v-power and 10% meth
clinic chucked the engine together 3 days before scooby shootout in 2007 and it ran 11.0 @ 127mph, would of gone 10's if the PAR box had'nt broken
clinic chucked the engine together 3 days before scooby shootout in 2007 and it ran 11.0 @ 127mph, would of gone 10's if the PAR box had'nt broken
11.00 seconds thats good is that with full weight and is it an ra?