MD321H Vs TD05 20G Vs Garrett GT2871R
15 March 2009, 11:03 PM
#32
Got a MD321h on my RA and it made 397 bhp with 372lbs/ft at 1.5 bar/Vpower only and that was in third gear what is very short on a RA
Being mapped again now with PPG gearbox and more mods on the induction side by JGM and expect to be in the 400bhp on just V-power
Being mapped again now with PPG gearbox and more mods on the induction side by JGM and expect to be in the 400bhp on just V-power
Last edited by Anger; 15 March 2009 at 11:04 PM.
16 March 2009, 03:46 AM
#33
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An MD321H turbo will be £400-500 more expensive than one of Harveys HS380's though and if you can get 409bhp with a HS380 on a 2.0 with good characteristics then why the need to spend any more if thats the guys target, that extra cash could go on other mods, FMIC and some thermal management etc
16 March 2009, 09:06 AM
#34
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Going for 400hp, you shouldn't read too much in to a dyno graph in terms of spool up. The cars mentioned all make full boost of a little over 1.5 bar by 3500rpm on the road, a little off natural motorway cruising rpms. Laggy, I think not !
16 March 2009, 11:04 AM
#37
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Lag in a low gear isn't even an issue on a GT35R, you have the gearing down there so that it barely matters. Lag would be far more noticable in the situation discussed, high gear, low rpm foot hard down IMHEO.
16 March 2009, 11:16 AM
#38
Interesting debate.
Any turbo needs a good engine base to take advantage of. If people are fitting these to a stock engine and winding the boost back to protect them, then the peak figures will be the same for any of them (assuming they get there in the first place).
Bodski - are you going to limit the car to 400 ? or will you try and get as much out of it as possible (even if it is risking it) ?
If you are wanting the best performance, then a garret core will give far quicker response than a sleeve bearing turbo. This doesnt show itself on dyno printouts but you can really feel it on the road in pick up. Is the GT2871 a std location turbo ?
Any turbo needs a good engine base to take advantage of. If people are fitting these to a stock engine and winding the boost back to protect them, then the peak figures will be the same for any of them (assuming they get there in the first place).
Bodski - are you going to limit the car to 400 ? or will you try and get as much out of it as possible (even if it is risking it) ?
If you are wanting the best performance, then a garret core will give far quicker response than a sleeve bearing turbo. This doesnt show itself on dyno printouts but you can really feel it on the road in pick up. Is the GT2871 a std location turbo ?
16 March 2009, 01:30 PM
#39
Dunc
I'm looking for a quick car across country, something that will pull all the way through the rev range, i'm not chasing figures at all. Torque is something that is probably just as important. It needs to pull from say 3000 rpm all the way through the rev range.
I'm not gonna push things any further than the mods i have, plus a replacement Turbo, FPR and maybe a set of headers (although talking to Harvey it sounds as though fitting say GT Spec will slow the spool and only have noticeable benifits at higher rpm which for road use seems to be a backward step)
The GT2871 is a older Garret that's being sold on here, it is a standard position, although it would need modifying to fit a Newage STi. I Think the new version is a 2876???
I'm looking for a quick car across country, something that will pull all the way through the rev range, i'm not chasing figures at all. Torque is something that is probably just as important. It needs to pull from say 3000 rpm all the way through the rev range.
I'm not gonna push things any further than the mods i have, plus a replacement Turbo, FPR and maybe a set of headers (although talking to Harvey it sounds as though fitting say GT Spec will slow the spool and only have noticeable benifits at higher rpm which for road use seems to be a backward step)
The GT2871 is a older Garret that's being sold on here, it is a standard position, although it would need modifying to fit a Newage STi. I Think the new version is a 2876???
16 March 2009, 02:28 PM
#40
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I agree, I'd rather have put a 2.1 stroker in on the standard turbo with all the trimmings.
But hindsight is always a wonderful thing. But now I have the MD I'll be very happy next year once I do go to a 2.1 forged motor. Mine is restricted by ecu limitations currently, so need an AVCR or a new ecu.....
dunx
But hindsight is always a wonderful thing. But now I have the MD I'll be very happy next year once I do go to a 2.1 forged motor. Mine is restricted by ecu limitations currently, so need an AVCR or a new ecu.....
dunx
16 March 2009, 02:29 PM
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harvey st380 looks realy impresive and thats just with v-power and then martyn j md turbo seems pretty good i would have both if i had the choice lol
theres also a harvey st420 right i wonder what thats like?
theres also a harvey st420 right i wonder what thats like?
16 March 2009, 07:29 PM
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16 March 2009, 07:50 PM
#47
Dunc
I'm looking for a quick car across country, something that will pull all the way through the rev range, i'm not chasing figures at all. Torque is something that is probably just as important. It needs to pull from say 3000 rpm all the way through the rev range.
I'm not gonna push things any further than the mods i have, plus a replacement Turbo, FPR and maybe a set of headers (although talking to Harvey it sounds as though fitting say GT Spec will slow the spool and only have noticeable benifits at higher rpm which for road use seems to be a backward step)
The GT2871 is a older Garret that's being sold on here, it is a standard position, although it would need modifying to fit a Newage STi. I Think the new version is a 2876???
I'm looking for a quick car across country, something that will pull all the way through the rev range, i'm not chasing figures at all. Torque is something that is probably just as important. It needs to pull from say 3000 rpm all the way through the rev range.
I'm not gonna push things any further than the mods i have, plus a replacement Turbo, FPR and maybe a set of headers (although talking to Harvey it sounds as though fitting say GT Spec will slow the spool and only have noticeable benifits at higher rpm which for road use seems to be a backward step)
The GT2871 is a older Garret that's being sold on here, it is a standard position, although it would need modifying to fit a Newage STi. I Think the new version is a 2876???
Last edited by RA-grant; 16 March 2009 at 08:04 PM.
16 March 2009, 08:02 PM
#48
An MD321H turbo will be £400-500 more expensive than one of Harveys HS380's though and if you can get 409bhp with a HS380 on a 2.0 with good characteristics then why the need to spend any more if thats the guys target, that extra cash could go on other mods, FMIC and some thermal management etc
HS380 is £850 + postage
I stand to be corrected
16 March 2009, 08:14 PM
#50
sorry guys the 71 or 76 bit refers to the compreesor size meaning 71mm or 76mm.
and the turbo i am selling isnt that old at 6 months and 1000 miles
compaired to the other turbos you are discussing its a bargain.
and the turbo i am selling isnt that old at 6 months and 1000 miles
compaired to the other turbos you are discussing its a bargain.
16 March 2009, 10:20 PM
#52
Harvey says the HS380 is enclosed inside american made machined TD05 cover but has all new parts inside. Unsure if it's based on either a 18G or 20G but it would make sense that the 380 is a 18g variant and the 420 is a 20g variant as has been said
17 March 2009, 01:04 AM
#54
Std V7 STI + MD321H + the usual bits made 390 bhp on BP Ultimate.
I honestly believe this turbo is crying out to be let loose on a forged motor....
dunx
P.S. ECU only able to cope with 1.55 bar as std. JGM suggests 1.7 with an AVCR is possible. It managed 2 bar with no boost control....
I honestly believe this turbo is crying out to be let loose on a forged motor....
dunx
P.S. ECU only able to cope with 1.55 bar as std. JGM suggests 1.7 with an AVCR is possible. It managed 2 bar with no boost control....
Like you, I'm planning on a forged 2.1 stroker soon and I will run the 321H at 2.1 bar for lovely quick spool and some serious midrange grunt
17 March 2009, 12:29 PM
#57
I'm running a 321H with an AVCR - 1.7bar mid tailing to 1.6 bar top end and it's very potent (415bhp and 369lb/ft on Zen's conservative rollers) - you will enjoy
Like you, I'm planning on a forged 2.1 stroker soon and I will run the 321H at 2.1 bar for lovely quick spool and some serious midrange grunt
Like you, I'm planning on a forged 2.1 stroker soon and I will run the 321H at 2.1 bar for lovely quick spool and some serious midrange grunt
It Makes a very rapid car indeed,
I have driven an Ra with a 20g and it was good but not a patch on the 321H
