Only 403bhp on md321t
26 October 2015, 07:59 PM
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Only 403bhp on md321t
Hi, I need some help in reaching 450bhp on my 04 sti wr1. I've been mapped and dyno at 403bhp at 1.6bar of boost using a MD321T billet turbo with all the supporting mods:
Rcm headers
750cc injectors
Fuel lab fpr
Perrin intake
Rcm turbo back exhaust
Japsppeed fmic
Remap jgm
Do I need to run more boost pressure? Any help would be appreciated
26 October 2015, 08:02 PM
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I ran 1.8 on md321t on 55plate sti made 431bhp
Last edited by peter zippy reid; 26 October 2015 at 08:05 PM .
26 October 2015, 08:09 PM
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Thanks for the reply, was this on standard ecu on v-power?
26 October 2015, 08:12 PM
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Standard ecu but with apexi avcr wired it to get the 1.8bar and v-power
650 injectors
Hdi fmic
Fuel pressure regulator
Was really laggy on my 2.0l
26 October 2015, 08:14 PM
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26 October 2015, 08:16 PM
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Yeah mine needs to be around 4500rpm before she takes off. Does fitting the avcr get round a problem to do with the stock map sensor?
26 October 2015, 08:17 PM
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Quote:
Originally Posted by
Tidgy
got a 3port on it?
Yeah it has 3-port solenoid
26 October 2015, 08:19 PM
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Avcr has a 3 port solenoid and different map sensor
26 October 2015, 08:20 PM
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Is the standard ecu boost not 1.65bar max without avcr
26 October 2015, 08:23 PM
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I'm not sure, I think I'm might be at my boost limit?
26 October 2015, 08:24 PM
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im on the factory map sensor btw
26 October 2015, 08:26 PM
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Even with avcr you will struggle to get 450bhp out the md321t on 2.0l im sure theres a thread here about not getting 450 out 2.0l
26 October 2015, 08:29 PM
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thanks I'll search for that thread, I'm still 30hp behind you, might see if I can get the boost raised
My graph
26 October 2015, 08:31 PM
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26 October 2015, 08:35 PM
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26 October 2015, 08:36 PM
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Mine was 385 no much in that then
26 October 2015, 08:41 PM
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When I had my 321t mapped Andy F recommended to stay on standard ported headers, mine made 412lbft, and 409bhp, have bought a decat downpipe now so hoping for more.
Have you checked for an exhaust leak?
26 October 2015, 08:45 PM
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I have checked for any leaks and seems to be ok, does it look laggy to you?
26 October 2015, 08:47 PM
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Quote:
Originally Posted by
peter zippy reid
Is the standard ecu boost not 1.65bar max without avcr
max it can see
26 October 2015, 08:47 PM
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Does seem not many have hit 450 on a 2.0l using v-power
26 October 2015, 08:56 PM
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More suited to a 2.5 tbh I think that's where the numbers seem to hit. Hence the lag and needing more boost to get there
26 October 2015, 09:01 PM
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are there any better turbo options to make the 450bhp more easy
26 October 2015, 09:06 PM
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From a guy who chased 450bhp on my last two cars why do you want 450bhp instead of say 420bhp from say sc42
26 October 2015, 09:07 PM
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And i still never got the 450 and sold both cars
26 October 2015, 09:12 PM
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I guess because I've got a 450bhp turbo fitted and I'm making 47bhp less than what it should. I believe it will feel a lot more aggressive with an extra 47bhp.
If they only make around 420 then I might as well fit a smaller 400bhp turbo and have less lag.
26 October 2015, 09:19 PM
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If your car was 2.5 you would have the 450bhp
26 October 2015, 09:24 PM
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Sc42 will hit 450 with 1.8ish bar and a splash of meth I reckon 470 is achievable.
420 is only a guide but they tend to go more depending on set up.
It's what I'm going to use.
26 October 2015, 09:25 PM
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So the md321t billet is a turbo best suited to a 2.5litre, suppose I'll just have to make do till a more fruitier turbo is released
26 October 2015, 09:29 PM
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What about the sc46 is that the md321t equal?
26 October 2015, 09:32 PM
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Nah sc46 is more 500+hp turbo IMO (with right spec and meth) slightly laggier than the 42 but still a good unit and will make the 450 easily on pump fuel
Last edited by bustaMOVEs; 26 October 2015 at 09:33 PM .