Always choose SAE correction for your dyno runs
	click turbo name to jump to the results section for that turbo
	the best A/R is subjective - the value chosen by me in my opinion minimizes lag while minimally (or not at all) sacrificing top end

 

Turbo	approx. calculated max rwhp	achieved rwhp (noted if nos or non SAE)	Manufacturer	Compressor			Turbine			optimal A/R or (offered)
				Wheel	Inducer (inch /mm)	Exducer  (inch / mm)	Wheel	Exducer (inch / mm)	Major (inch / mm)
CT-12	?	485	Hitachi		2 @ 1.535 / 39.0	2 @ 2.283 / 58.0		2 @ 1.732 / 44.0	2 @ 2.047 / 52.0
GT35	390		Garrett	52 trim	2.016 / 51.2	2.795 / 71.0	84 trim	2.453 / 62.3	2.677 / 68.0	.58
	475				2.157 / 54.8	2.992 / 76.0
TS04	500	489	Turbonetics	TS04	2.300 / 58.4	3.304 / 83.9	O trim	2.296 / 58.3	2.922 / 74.2	.58
							P trim	2.544 / 64.6	2.922 / 74.2
GT37	460		Garrett	52 trim	2.157 / 54.8	2.992 / 76.0	84 trim	2.614 / 66.4	2.854 / 72.5	.58
	530				2.327 / 59.1	3.228 / 82.0
TO4E 62-1	580	505	Turbonetics	T04E 62-1	2.441 / 62.0		P trim	2.544 / 64.6	2.922 / 74.2	.58, .70
TO4B 60-1	580	473	Turbonetics	T60-1	2.324 / 59.0	3.000 / 76.2	P trim	2.544 / 64.6	2.922 / 74.2	.58, .70
SP57		550	Sound Performance				GT35 84 trim	2.453 / 62.3	2.677 / 68.0	(.58)
SP60		560	Sound Performance				P trim	2.544 / 64.6	2.922 / 74.2	.58, .68
GT35R	580		Garrett	56 trim	2.416 / 61.4	3.228 / 82.0	84 trim	2.453 / 62.3	2.677 / 68.0
GT40	520		Garrett	50 trim	2.283 / 58.0	3.228 / 82.0	73 trim	2.591 / 65.8	3.031 / 77.0	.7?
	600			54 trim	2.547 / 64.7	3.465 / 88.0	84 trim	2.547 / 64.7	3.031 / 77.0
T61	630	626	Turbonetics	T61	2.382 / 60.5	3.544 / 90.0	P trim	2.544 / 64.6	2.922 / 74.2	.58, .70
		637 (non)
PHR1	~630	628 (std)	Powerhouse Racing
TO4B 62-1	665	670	Turbonetics	T62-1	2.441 / 62.0	3.000 / 76.2	P trim	2.544 / 64.6	2.922 / 74.2	.70
PHRS	~665	569* (a/f, std)	Powerhouse Racing
PHR2	~665	537	Powerhouse Racing
T64	662	660*	Turbonetics	T64	2.490 / 63.2	3.670 / 93.2	P trim	2.544 / 64.6	2.922 / 74.2	.70
SP63	650+	683	Sound Performance	SP63	2.496 / 63.4	3.315 / 84.2	P trim	2.544 / 64.6	2.922 / 74.2	.68
T51R KAI	671		HKS (Garrett)	GT 42 56 trim	2.768 / 70.3	3.701 / 94.0	GT? 76 trim	2.811 / 71.4	3.228 / 82.0	(1.00)
T66	710	696	Turbonetics	T66	2.580 / 65.5	3.584 / 91.0	P trim	2.544 / 64.6	2.922 / 74.2	.70
PHR2+	~710	680 (std)	Powerhouse Racing
SP66	~710	563	Sound Performance	SP66	2.596 / 65.9	3.601 / 91.5	Q trim	2.693 / 68.4	3.111 / 79.0	.68
T78	~700	630	GReddy (Mitsubishi)	33D	2.598 / 66.0	3.543 / 90.0	T78	2.559 / 65.0	2.913 / 74.0
		686 (non)
T68-1	715	?	Turbonetics	-
T70	765	?	Turbonetics		2.720 / 69.1	3.850 / 97.8	Q trim	2.693 / 68.4	3.111 / 79.0
T76	831	?	Turbonetics		3.020 / 76.7	4.030 / 102.4	Q trim	2.693 / 68.4	3.111 / 79.0
TO4R	645	729	HKS	GT 63 trim	2.626 / 66.7	3.307 / 84.0	GT 76 trim	2.547 / 64.7	2.921 / 74.2	(.81)
PTE67		712	Precision Turbo				P trim	2.544 / 64.6	2.922 / 74.2	.68
PTE67H		759					Q trim	2.693 / 68.4	3.111 / 79.0	.68
SP70	?	679	Sound Performance	SP70	2.770 / 70.4	3.585 / 91.1	Q trim	2.693 / 68.4	3.111 / 79.0	.70, .81
T72	877	804 (70)	Turbonetics	T72	2.840 / 72.1	4.030 / 102.4	Q trim	2.693 / 68.4	3.111 / 79.0	.81
2835	756	782	HKS	48 trim	2 @ 1.941 / 49.3	2 @ 2.799 / 71.1	84 trim	2 @ 2.039 / 51.8	2 @ 2.224 / 56.5	.61
				52 trim	2 @ 2.016 / 51.2
				56 trim	2 @ 2.091 / 53.1
2835R	774	?	HKS	56 trim	2 @ 2.091 / 53.1	2 @ 2.799 / 71.1	90 trim	2 @ 2.110 / 53.6	2 @ 2.224 / 56.5	.61
T88	~860	?	GReddy (Mitsubishi)	33D	2.598 / 66.0	3.543 / 90.0	T88	2.846 / 72.3	3.346 / 85.0
T88		?		34D	2.744 / 69.7	3.740 / 95.0
T88H		815
T51R SPL	838	862	HKS	GT? 56 trim	3.012 / 76.5	4.024 / 102.2	GT? 76 trim	2.811 / 71.4	3.228 / 82.0	(1.00)
GT42	760	749	Garrett	56 trim	2.768 / 70.3	3.701 / 94.0	84 trim	2.961 / 75.2	3.228 / 82.0	.81?
	877			53 trim	2.925 / 74.3	4.016 / 102.0
SP74	~877	900	Sound Performance	GT 42 53 trim	2.925 / 74.3	4.016 / 102.0	Q trim	2.693 / 68.4	3.111 / 79.0	.81
T88	1150		Turbonetics	T88	3.460 / 87.9	4.600 / 116.8
SP88	1200+	1040	Sound Performance				SP88	3.425 / 87
T91	1150		Turbonetics	T91	3.580 / 90.9	5.000 / 127

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