Why a 76? Compressor map question...
07-05-2006, 08:22 AM
#1
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Why a 76? Compressor map question... So, I am starting to think about going turbo.
I keep seeing everyone using gt76s. People are making great power with them but it seem like an inefficent choice.
The GT4088 is the one I have my eye on...seems like even this is border line efficent.
I have been using this a a way to figure out air flow...
Basically, I am wondering why the 76 is a more popular choice then an 88 or even bigger...
I keep seeing everyone using gt76s. People are making great power with them but it seem like an inefficent choice.
The GT4088 is the one I have my eye on...seems like even this is border line efficent.
I have been using this a a way to figure out air flow...
Code:
PSI 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 rpm\PR 1.00 1.07 1.14 1.20 1.27 1.34 1.41 1.48 1.54 1.61 1.68 1.75 1.82 1.88 1.95 2.02 3400 20 21 22 24 25 26 28 29 30 32 33 34 36 37 38 40 3500 20 22 23 24 26 27 28 30 31 33 34 35 37 38 39 41 3600 21 22 24 25 26 28 29 31 32 34 35 36 38 39 41 42 3700 21 23 24 26 27 29 30 32 33 34 36 37 39 40 42 43 3800 22 23 25 26 28 29 31 32 34 35 37 38 40 41 43 44 3900 23 24 26 27 29 30 32 33 35 36 38 39 41 42 44 45 4000 23 25 26 28 29 31 33 34 36 37 39 40 42 44 45 47 4100 24 25 27 29 30 32 33 35 37 38 40 41 43 45 46 48 4200 24 26 28 29 31 32 34 36 37 39 41 42 44 46 47 49 4300 25 27 28 30 32 33 35 37 38 40 42 43 45 47 48 50 4400 25 27 29 31 32 34 36 38 39 41 43 44 46 48 50 51 4500 26 28 30 31 33 35 37 38 40 42 44 45 47 49 51 52 4600 27 28 30 32 34 36 37 39 41 43 45 46 48 50 52 54 4700 27 29 31 33 35 36 38 40 42 44 46 47 49 51 53 55 4800 28 30 31 33 35 37 39 41 43 45 47 48 50 52 54 56 4900 28 30 32 34 36 38 40 42 44 46 48 49 51 53 55 57 5000 29 31 33 35 37 39 41 43 45 47 49 50 52 54 56 58 5100 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 5200 30 32 34 36 38 40 42 44 46 48 50 52 55 57 59 61 5300 31 33 35 37 39 41 43 45 47 49 51 54 56 58 60 62 5400 31 33 35 38 40 42 44 46 48 50 52 55 57 59 61 63 5500 32 34 36 38 40 43 45 47 49 51 53 56 58 60 62 64 5600 32 35 37 39 41 43 46 48 50 52 54 57 59 61 63 65 5700 33 35 37 40 42 44 46 49 51 53 55 58 60 62 64 66 5800 33 36 38 40 43 45 47 49 52 54 56 59 61 63 65 68 5900 34 36 39 41 43 46 48 50 53 55 57 60 62 64 67 69 6000 35 37 39 42 44 46 49 51 53 56 58 61 63 65 68 70 6100 35 38 40 42 45 47 50 52 54 57 59 62 64 66 69 71 6200 36 38 41 43 46 48 50 53 55 58 60 63 65 67 70 72 6300 36 39 41 44 46 49 51 54 56 59 61 64 66 69 71 73 6400 37 39 42 44 47 50 52 55 57 60 62 65 67 70 72 75 6500 38 40 43 45 48 50 53 55 58 61 63 66 68 71 73 76 6600 38 41 43 46 48 51 54 56 59 61 64 67 69 72 74 77 6700 39 41 44 47 49 52 54 57 60 62 65 68 70 73 76 78 6800 39 42 45 47 50 53 55 58 61 63 66 69 71 74 77 79
07-05-2006, 01:41 PM
#6
Originally Posted by 70Stang
hmmmm
Can you post a link to a map for the 76 people are using?
THANKS!
Are these GT42 76s or what? I must be confused...
Can you post a link to a map for the 76 people are using?
THANKS!
Are these GT42 76s or what? I must be confused...
I was using a GT42-76... no one has a compressor map for it...... from what we know about it it will work very well with a 346ci LS1.... in the upper RPM it will run out of steam...on a 370.
I wouldnt use it though........ im a little pissed at Precision right now
Kyle
07-05-2006, 02:06 PM
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Originally Posted by NA$TY-TA
I was using a GT42-76... no one has a compressor map for it...... from what we know about it it will work very well with a 346ci LS1.... in the upper RPM it will run out of steam...on a 370.
I wouldnt use it though........ im a little pissed at Precision right now
Kyle
I wouldnt use it though........ im a little pissed at Precision right now
Kyle
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07-05-2006, 02:37 PM
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Originally Posted by NA$TY-TA
I was using a GT42-76... no one has a compressor map for it...... from what we know about it it will work very well with a 346ci LS1.... in the upper RPM it will run out of steam...on a 370.
I wouldnt use it though........ im a little pissed at Precision right now
Kyle
I wouldnt use it though........ im a little pissed at Precision right now
Kyle
Did your new toy come in? 
07-05-2006, 02:56 PM
#13
For reference, a standard Garrett part number like GT4088, GT4202, etc lists the size of the compressor wheel EXDUCER.
you need to know the compressor wheel trim, and you can find the size of the inducer on the compressor.
IE, my GT4202's are 74mm inducer, 102mm exducer. Thus the 02 in the part number.
you need to know the compressor wheel trim, and you can find the size of the inducer on the compressor.
IE, my GT4202's are 74mm inducer, 102mm exducer. Thus the 02 in the part number.
07-05-2006, 04:24 PM
#18
Originally Posted by longrange4u
Jose has a Map for it I think... think I saw it on his site. I wish I could use a GT42-76 but I dont have enough room for that big *** housing. That is why I am going with a 76MPS