View Poll Results: choose and post why.
1.6 turbo
11
36.67%
1.8 turbo
11
36.67%
sub 300whp
10
33.33%
300+ whp oh shit
11
36.67%
Multiple Choice Poll. Voters: 30. You may not vote on this poll
Best turbo?
10-21-2006, 02:57 PM
#4
none is better than another... it's all about application, cost, and what you already own 
Personally I'm shooting for roughly 300-350 whp on mine, but I need cash first. Megasquirt will be on order when I return my basement full of bottle deposits (10 cents each in MI and I have several thousand). N/A still at the moment.
Personally I'm shooting for roughly 300-350 whp on mine, but I need cash first. Megasquirt will be on order when I return my basement full of bottle deposits (10 cents each in MI and I have several thousand). N/A still at the moment.
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voted for less than 300 hp
10-21-2006, 04:58 PM
#9
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The T3 60 trim or S60 rocks. Flipside just got done switching out a greddy setup that was making 225 whp at 12 psi for a T3 S60. No dyno numbers yet but the owner reports better spool and the car is much faster at only 10 psi.
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10-21-2006, 09:39 PM
#11
Junior Member
Join Date: Oct 2006
Posts: 312
Total Cats: 0
T3 60 trim if youre on a budget. Small (stg 1) 48 trim turbine gives great spoolup and the 60 trim has enough flow for the stock bottom end. Just run it at 12 psi and be happy about all the money you saved. You can make mid-high 200s at the wheel with this turbo and they are super cheap as well.
If you want to start doing a buildup and go for 15+psi, go straight to a T3/T04E 50 trim with a stage 3 48 trim turbine side. I went for a stage 1 turbine and a t04b s trim compressor and it is OK for 15-18 psi in cool weather, but above 85F, the intercooler heatsoaks very quickly due to the low compressor efficiency. I'm gonna upgrade in a few weeks once I finish selling my house.
edit: oh and in case it wasnt common knowledge, all of the turbine housings hook up the same, so you can start with a T3 60 trim and upgrade to a bigger turbine and a T4 compressor later on without redoing your manifold, DP or intercooler pipes.
If you want to start doing a buildup and go for 15+psi, go straight to a T3/T04E 50 trim with a stage 3 48 trim turbine side. I went for a stage 1 turbine and a t04b s trim compressor and it is OK for 15-18 psi in cool weather, but above 85F, the intercooler heatsoaks very quickly due to the low compressor efficiency. I'm gonna upgrade in a few weeks once I finish selling my house.
edit: oh and in case it wasnt common knowledge, all of the turbine housings hook up the same, so you can start with a T3 60 trim and upgrade to a bigger turbine and a T4 compressor later on without redoing your manifold, DP or intercooler pipes.
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10-21-2006, 11:10 PM
#16
Junior Member
Join Date: Oct 2006
Posts: 312
Total Cats: 0
The T04B is better than the 60 trim, but that is about it. The stall range is too high for the miata, the efficient range is just too small and the area outside the efficient range is too inefficient. The little island is like 73% and falls off to 50% by the time you hit about 7-8k at 15-18 psi.
The TO4E spools sooner, has a much broader efficient range and when it isnt in the high efficiency island, the efficiency only drops to about 74%. So you can take it all the way up to 400+ whp and it is still pushing cooler air than the T04B-S at its best.
None of this really matters as much if it is cold out, but it often isnt. On the highway, the increased airflow through the IC seems to cancel out a lot of the hot air generating tendencies of the T04B. Theoretically it is capable of 350hp, but you would need a very efficient intercooler and some cold ambient temperatures to accomplish this. Most of that airflow on the right side of the compressor map is hot air.
The TO4E spools sooner, has a much broader efficient range and when it isnt in the high efficiency island, the efficiency only drops to about 74%. So you can take it all the way up to 400+ whp and it is still pushing cooler air than the T04B-S at its best.
None of this really matters as much if it is cold out, but it often isnt. On the highway, the increased airflow through the IC seems to cancel out a lot of the hot air generating tendencies of the T04B. Theoretically it is capable of 350hp, but you would need a very efficient intercooler and some cold ambient temperatures to accomplish this. Most of that airflow on the right side of the compressor map is hot air.
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what a nice friend.it comes off a nissan s15 sr20det motor.its a t28 and ball bearing dont really know what one its excatly.went on garrett.com they all look similar.
