MD321T MDX321T Turbo Advice
18 October 2012, 10:05 PM
#1
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MD321T MDX321T Turbo Advice
Hi All,
Can someone tell me exactly what the difference is between the MD321T & the MDX321T.
After deciding to upgrade my RCM400 I had a short list of MD321T or H or SC46 or 42.
However my mappers opinion is that only the 42 on my list would be suitable, but he has advised me to consider the MDX321T. Car is 96STI 2L CDB fully forged.
I'm inclined to go with my mappers choice as he's always right about my car, but just after other opinions & info on the MDX.
Can someone tell me exactly what the difference is between the MD321T & the MDX321T.
After deciding to upgrade my RCM400 I had a short list of MD321T or H or SC46 or 42.
However my mappers opinion is that only the 42 on my list would be suitable, but he has advised me to consider the MDX321T. Car is 96STI 2L CDB fully forged.
I'm inclined to go with my mappers choice as he's always right about my car, but just after other opinions & info on the MDX.
18 October 2012, 11:15 PM
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So the only difference is the billet wheel meaning it spools earlier & is less laggy meaning it would be suitable for a 2L. Has anyone tried the MDX & the SC42 for a comparison?
19 October 2012, 08:30 AM
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I would go slightly further from what KAS35RSTI has said and state that it can certainly be about the figures, but you really need to look at the area UNDER the curve and not just peak.
Based on those two graphs above I would say that the SC42 one is quite a bit better than the MDX321T in the lowdown area. However the graph below (which is mine on a OEM 2ltr JDM with AVCS) is better than both, using the Billet LM450. It has the spool of the SC42 (mine has pretty amazing torque for a 2ltr) and the top end to match the MDX321T.
All peak figures are around the same, but it just highlights what you REALLY need to look at when comparing graphs.
Based on those two graphs above I would say that the SC42 one is quite a bit better than the MDX321T in the lowdown area. However the graph below (which is mine on a OEM 2ltr JDM with AVCS) is better than both, using the Billet LM450. It has the spool of the SC42 (mine has pretty amazing torque for a 2ltr) and the top end to match the MDX321T.
All peak figures are around the same, but it just highlights what you REALLY need to look at when comparing graphs.
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19 October 2012, 07:37 PM
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Not familiar with the LM 450 will try to do some research on it. Iv been told that the MD 321T can have a billet conversion. Will this make it an MDX321T, & is this worthwhile & cost effective?
19 October 2012, 08:41 PM
#12
Price for conversion is £295 plus VAT,but for actual prices would ask Turbo Dynamics or Lateral Performance
https://www.scoobynet.com/trader-ann...et-turbos.html
Jura
20 October 2012, 12:43 AM
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Based on those two graphs above I would say that the SC42 one is quite a bit better than the MDX321T in the lowdown area. However the graph below (which is mine on a OEM 2ltr JDM with AVCS) is better than both, using the Billet LM450. It has the spool of the SC42 (mine has pretty amazing torque for a 2ltr) and the top end to match the MDX321T.
All peak figures are around the same, but it just highlights what you REALLY need to look at when comparing graphs.
All peak figures are around the same, but it just highlights what you REALLY need to look at when comparing graphs.
20 October 2012, 01:02 AM
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This is true. Cheers Jura.
Mine is also using a Sports Cat from RCM.
Going by Shauns graph that deffo picks up lovely torque. I assume this is due to the Twinscreen getting the gasses up quicker etc?
Personally for me the older version MD321T over the MDX321T Billet
is like night and day.
Steve
20 October 2012, 01:05 AM
#16
This is true. Cheers Jura.
Mine is also using a Sports Cat from RCM.
Going by Shauns graph that deffo picks up lovely torque. I assume this is due to the Twinscreen getting the gasses up quicker etc?
Personally for me the older version MD321T over the MDX321T Billet
is like night and day.
Steve
Mine is also using a Sports Cat from RCM.
Going by Shauns graph that deffo picks up lovely torque. I assume this is due to the Twinscreen getting the gasses up quicker etc?
Personally for me the older version MD321T over the MDX321T Billet
is like night and day.
Steve
Jura
20 October 2012, 01:28 AM
#18
Fuel lines Steve,you are running braided lines or not?
Race fuel is expensive and really not sure if its worth the extra outcome,we are never tried put our wagon on the rollers after NOS mapping/tweaking
As Duncan and Neil said with better heads we should break 500bhp,which we are never tried
You will see how you get on and good luck
Jura
22 October 2012, 01:06 PM
#23
To be honest, no! I had almost settled on the SC42 but wondered how much more it would give, over what I've already got. I was also told that the billet 321T was now fast spooling enough for the 2 litre with VVT It would also be a bit more 'future proof' should the lure of a 2.1 and multi maps etc become too much for me!
JohnD
JohnD
23 October 2012, 07:44 AM
#28
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I'm a huge fan of both the SC42 and SC46.
Used them aplenty on 2.1 strokers and they always deliver the goods.
Used them aplenty on 2.1 strokers and they always deliver the goods.
23 October 2012, 08:38 AM
#29
