SR20DET - Definately NOT Impressed
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Joined: Dec 2003
Posts: 123
On the RSX Type-S, that version of i-VTEC combines normal VTEC (third lobe and rocker, locking pin) with up to 50 degrees of cam phasing. Traditional VTEC doesn't alter anything except lift/duration. That lift and duration depends on how the VTEC lobe is ground.
It's VTEC. Vee-Tee-Eee-See.
Nissan's SR16DE with VVL is the closest thing to Honda's VTEC system. It has variable lift, but I'm not quite sure how it gets the extra lift. Toyota's VVTL-i has a slider that bumps the second slightly-lower lift cam to the same height as the other valve.
VVT, VVT-i, VarioCam, Double-VANOS, etc. are all cam phasing devices. I don't know what brand of Voodoo the Japanese use, but the Germans put a helical gear that telescopes with oil pressure to change the cam phasing.
It's VTEC. Vee-Tee-Eee-See.
Nissan's SR16DE with VVL is the closest thing to Honda's VTEC system. It has variable lift, but I'm not quite sure how it gets the extra lift. Toyota's VVTL-i has a slider that bumps the second slightly-lower lift cam to the same height as the other valve.
VVT, VVT-i, VarioCam, Double-VANOS, etc. are all cam phasing devices. I don't know what brand of Voodoo the Japanese use, but the Germans put a helical gear that telescopes with oil pressure to change the cam phasing.
Thread Starter
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Joined: Dec 2002
Posts: 578
From: Arizona
Oh Christian - we are going to Nevada tomorrow, so I won't be at the shop....Derek will be there, but he doesn't have the mounts. I should be back in town around Thursday evening or so...sorry I couldn't follow through with tomorrow.
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Joined: Aug 2003
Posts: 249
From: QUEENZ, NYC
Originally posted by PROJECTRB240SX
WEAK CAMS (NA CAMS ARE SIMILAR TO THE RB20'S)
TURBO IS WEAKER THAN THE RB20'S
THE RB20 IS JUST AS GREAT OF A CHOICE AS THE RB25.
WEAK CAMS (NA CAMS ARE SIMILAR TO THE RB20'S)
TURBO IS WEAKER THAN THE RB20'S
THE RB20 IS JUST AS GREAT OF A CHOICE AS THE RB25.
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Joined: Feb 2004
Posts: 167
From: GILBERT, AZ
MY GTECH READS 238.... SO I'M GUESSING AROUND 200HP TO THE GROUND. KEEP IN MIND MOST PEOPLE SEE A 10HP DIFFERENCE BETWEEN GTECH AND REAL DYNO. ALSO MY MOTOR MAY NOT BE STOCK, IT MIGHT HAVE HIDDEN GODDIES ON THE INSIDE.
YEAH YOU CAN JUST REPLACE THE CAMS BUT THATS ANOTHER $600+ ONTOP OF THE MOTOR COST THAT WITH THE RB20 YOU WONT NEED TO DO FOR AWHILE.
THE RB25DET T28 TURBO IS SIGNIFICANTLY WEAKER THAN THE RB20'S..... THE RB25 TURBO HAS BEEN KNOWN TO BLOW AT 11PSI WHILE THE RB20DET TURBOS CONSISTENTLY SEE 13-15PSI. NOT EVERY TURBO IS THE SAME AND SOME ARE STRONGER THAN OTHERS, SO THESE AREN'T ALWAYS THE RESULTS.
YEAH YOU CAN JUST REPLACE THE CAMS BUT THATS ANOTHER $600+ ONTOP OF THE MOTOR COST THAT WITH THE RB20 YOU WONT NEED TO DO FOR AWHILE.
THE RB25DET T28 TURBO IS SIGNIFICANTLY WEAKER THAN THE RB20'S..... THE RB25 TURBO HAS BEEN KNOWN TO BLOW AT 11PSI WHILE THE RB20DET TURBOS CONSISTENTLY SEE 13-15PSI. NOT EVERY TURBO IS THE SAME AND SOME ARE STRONGER THAN OTHERS, SO THESE AREN'T ALWAYS THE RESULTS.
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Joined: Jan 2004
Posts: 95
From: Toronto
What a mess this is turning out to be. It's the battle of the SR20's V.S. the RB's 
I like the SR20det s13/s14 red top and black top but I find that in order to make them impresive you must put money into them. The RB25det and the RB26dett are great engines they have more stock horsepower then the SR20 series engines so stock v.s. stock the RB series are better motors. Personaly thoe I am going with the SR20dett S15 black top, 250 horsepower with vvt and a 6 speed transmission. It doesn't have as much power as the RB26dett but it's as close as you can get with a stock SRseries motor to a stock RB26dett. And from what I have found is that althoe the RB series is cheaper to buy, it is cheaper to get parts for an SR series motor then is is for an RB series motor and not only that, sometimes it's hard to get some parts for the RB motors, you have to order them and the RB has not prouven it self to be as reliable as the SR series. So as for me SR20DETT S15 Black top is my weapon of choice.
I like the SR20det s13/s14 red top and black top but I find that in order to make them impresive you must put money into them. The RB25det and the RB26dett are great engines they have more stock horsepower then the SR20 series engines so stock v.s. stock the RB series are better motors. Personaly thoe I am going with the SR20dett S15 black top, 250 horsepower with vvt and a 6 speed transmission. It doesn't have as much power as the RB26dett but it's as close as you can get with a stock SRseries motor to a stock RB26dett. And from what I have found is that althoe the RB series is cheaper to buy, it is cheaper to get parts for an SR series motor then is is for an RB series motor and not only that, sometimes it's hard to get some parts for the RB motors, you have to order them and the RB has not prouven it self to be as reliable as the SR series. So as for me SR20DETT S15 Black top is my weapon of choice.
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Joined: Oct 2002
Posts: 2,603
From: Raleigh, NC
Originally posted by TORONTO240sx
What a mess this is turning out to be. It's the battle of the SR20's V.S. the RB's I like the SR20det s13/s14 red top and black top but I find that in order to make them impresive you must put money into them. The RB25det and the RB26dett are great engines they have more stock horsepower then the SR20 series engines so stock v.s. stock the RB series are better motors. Personaly thoe I am going with the SR20dett S15 black top, 250 horsepower with vvt and a 6 speed transmission. It doesn't have as much power as the RB26dett but it's as close as you can get with a stock SRseries motor to a stock RB26dett. And from what I have found is that althoe the RB series is cheaper to buy, it is cheaper to get parts for an SR series motor then is is for an RB series motor and not only that, sometimes it's hard to get some parts for the RB motors, you have to order them and the RB has not prouven it self to be as reliable as the SR series. So as for me SR20DETT S15 Black top is my weapon of choice.
What a mess this is turning out to be. It's the battle of the SR20's V.S. the RB's
I like the SR20det s13/s14 red top and black top but I find that in order to make them impresive you must put money into them. The RB25det and the RB26dett are great engines they have more stock horsepower then the SR20 series engines so stock v.s. stock the RB series are better motors. Personaly thoe I am going with the SR20dett S15 black top, 250 horsepower with vvt and a 6 speed transmission. It doesn't have as much power as the RB26dett but it's as close as you can get with a stock SRseries motor to a stock RB26dett. And from what I have found is that althoe the RB series is cheaper to buy, it is cheaper to get parts for an SR series motor then is is for an RB series motor and not only that, sometimes it's hard to get some parts for the RB motors, you have to order them and the RB has not prouven it self to be as reliable as the SR series. So as for me SR20DETT S15 Black top is my weapon of choice.
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Joined: Dec 2003
Posts: 123
I used to think an SR20DETT existed. But that notion lasted for about three hours until I found out about that extra T. I don't see why anybody would think the S15 has a twin-turbo. On an Japanese 3S-GTE, it reads "Twin Entry Turbo" so I can see why people get confused on that motor...
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Joined: Aug 2003
Posts: 6,587
From: Socal, 909/626
Originally posted by TORONTO240sx
I like the SR20det s13/s14 red top and black top but I find that in order to make them impresive you must put money into them. ...So as for me SR20DETT S15 Black top is my weapon of choice.
I like the SR20det s13/s14 red top and black top but I find that in order to make them impresive you must put money into them. ...So as for me SR20DETT S15 Black top is my weapon of choice.
BTW, if you find another SR20DETT once you get yours, let me know so I can buy it right away.
Wait. NM there is no such thing
not stock anyways
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Joined: Dec 2003
Posts: 123
Originally posted by -HyJynX-
A 4 cylinder TT....doesnt sound right at all
A 4 cylinder TT....doesnt sound right at all
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Joined: Aug 2003
Posts: 249
From: QUEENZ, NYC
ok lets say rb25 turbos blow at around 11 psi. wont a t28 bb turbo flow better and provide more power than a t25 at slightly higher psi? and i thought ball bearing turbos were suppose to be better than umm the kind of turbo a t25 is (i dont remember)?
