3S-GTE JDM 3rd Gen Turbo Engine GT2860RS vs ct20b

Geogak · 11-23-2009, 10:47 PM

Ok heres the scoop. I just picked up a 3rd gen swap for my mr2, which already has a 2nd gen turbo with a slightly used GT28RS. Now I was orignaly planing to just move the GT20RS over to the Gen3 but I was told the Ct20b will perform better. I am not doubting this statement just want more info (Hard data) on the ct20b. But basically my options are use the used ct20b, or use the basically new gt28rs (which I just dished out some serious $$ for not to long ago). Of course if I use the ct20b I will sell the GT28. Before you start flaming me, here are my goals I want to make about 300-350hp and get a pretty fast spool up. Maybe the Ct20b can deliver this too, but will the gt28rs spool faster. will neither turbo ever realize my dreams of 350 hp. I am not gonna by another turbo I already have both of these turbos just wanna keep one.

I will mostly appreciate actual data rather than guesses but if a guess is all you got I'll take it.

rapier469 · 12-11-2009, 08:54 AM

Well I just recently made 305 whp, 303 ft/lbs on a cammed built 2.0 on the CT20B at approx. 17 psi. Based upon what I have heard about the GT28RS and some dyno charts I have seen, I would expect it to make slightly more power (on my setup) with the same or mildly better spool. I know for a fact that on SR20s, the 28RS is good for 350 whp...

STLMR2na · 12-11-2009, 10:20 AM

Bak@EMSPowered · 12-11-2009, 01:34 PM

Both of them are going to perform very similarly. The GT28RS has the advantage of having a metal turbine wheel, whereas the CT20B has a lighter weight ceramic turbine wheel that is more fragile, but should spool up faster.

I'll call you in a few minutes George. Been swamped all morning.

MuMan · 12-22-2009, 10:04 AM

The gt28rs will perform a little better and spool a little faster than the ct20b. I'm not aware of any ct20b that will spool faster than 2900. Both are capable 300whp turbo's on a gen3. The gt28rs would probably make 330whp with the right mods and fuel. The ct20b suffers from shaft flex, and as pointed out has (mostly) a ceramic turbine.

11-23-2009, 10:47 PM	#1 (permalink)
Geogak No Skills Join Date: Nov 2007 Location: Clifton NJ Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	GT2860RS vs ct20b Ok heres the scoop. I just picked up a 3rd gen swap for my mr2, which already has a 2nd gen turbo with a slightly used GT28RS. Now I was orignaly planing to just move the GT20RS over to the Gen3 but I was told the Ct20b will perform better. I am not doubting this statement just want more info (Hard data) on the ct20b. But basically my options are use the used ct20b, or use the basically new gt28rs (which I just dished out some serious $$ for not to long ago). Of course if I use the ct20b I will sell the GT28. Before you start flaming me, here are my goals I want to make about 300-350hp and get a pretty fast spool up. Maybe the Ct20b can deliver this too, but will the gt28rs spool faster. will neither turbo ever realize my dreams of 350 hp. I am not gonna by another turbo I already have both of these turbos just wanna keep one. I will mostly appreciate actual data rather than guesses but if a guess is all you got I'll take it.

12-11-2009, 10:20 AM	#3 (permalink)
STLMR2na DrivingStraight=Overrated Join Date: Oct 2009 Location: St. Louis, MO Posts: 1,053 Thanks: 25 Thanked 14 Times in 13 Posts iTrader Rating: (3/100% )	0.0

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12-11-2009, 08:54 AM	#2 (permalink)
rapier469 No Skills Join Date: Nov 2005 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (2/100% )	Well I just recently made 305 whp, 303 ft/lbs on a cammed built 2.0 on the CT20B at approx. 17 psi. Based upon what I have heard about the GT28RS and some dyno charts I have seen, I would expect it to make slightly more power (on my setup) with the same or mildly better spool. I know for a fact that on SR20s, the 28RS is good for 350 whp...

12-11-2009, 01:34 PM	#4 (permalink)
Bak@EMSPowered Banned Seller Join Date: Oct 2005 Location: Austin, TX Posts: 5,925 Thanks: 30 Thanked 193 Times in 165 Posts My Google Map iTrader Rating: (49/93% )	Both of them are going to perform very similarly. The GT28RS has the advantage of having a metal turbine wheel, whereas the CT20B has a lighter weight ceramic turbine wheel that is more fragile, but should spool up faster. I'll call you in a few minutes George. Been swamped all morning.

12-22-2009, 10:04 AM	#5 (permalink)
MuMan Nothing is forever.. Join Date: Sep 2006 Posts: 348 Thanks: 0 Thanked 21 Times in 14 Posts iTrader Rating: (0/0% )	The gt28rs will perform a little better and spool a little faster than the ct20b. I'm not aware of any ct20b that will spool faster than 2900. Both are capable 300whp turbo's on a gen3. The gt28rs would probably make 330whp with the right mods and fuel. The ct20b suffers from shaft flex, and as pointed out has (mostly) a ceramic turbine.