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RB20DET vs. SR20DET

S13 Silvia

By S13 Silvia,
in Engines & Forced Induction

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S13 Silvia Enthusiast

S13 Silvia

Posted
Posted

From your personal experience, what normally comes out on top? What's better in low-range and top-range? What pulls off the line better and what normally wins in the end?

I'm asking this because I am considering doing a RB20DET conversion in my auto ca18de because RB's are heaps cheaper than SR's.

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BOOSTMEISTER Mentor

BOOSTMEISTER

Posted
Posted

Here is a good comparison

My R32 gtst (rb20det manual)

fmic

3.5" turbo back exhaust

filter

cold air box

15 psi

vg30 turbo

s-afc

bigger fuel pump

My friends 180sx (sr20det manual)

fmic

3" turbo back exhaust

filter

13 psi

gtr fuel pump

Basically both cars are pretty much even up to 150km/h then the skyline gets about 2 car lengths on the 180 up to 220km/h

ALL TESTING WAS PERFORMED UNDER CONTROLLED CONDITIONS BY EXPERIENCED DRIVERS. IT IS NOT RECOMMENDED THAT THESE ACTS BE DUPLICATED ON OPEN ROADS. ALWAYS WEAR YOUR SEATBELT WHEN DRIVING AND HAVE A NICE DAY

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U WERE MINE Veteran

U WERE MINE

Posted
Posted
Originally posted by BOOSTMEISTER

ALL TESTING WAS PERFORMED UNDER CONTROLLED CONDITIONS BY EXPERIENCED DRIVERS.  IT IS NOT RECOMMENDED THAT THESE ACTS BE DUPLICATED ON OPEN ROADS.  ALWAYS WEAR YOUR SEATBELT WHEN DRIVING AND HAVE A NICE DAY

hahahhaha *cough* bullshit *cough*

well think of this .. with the money u save on gettting the rb20det, u can get a new turbo or ecu or whatever u want.. then which will be quicker??

engines both have there good and bad points.. sr20det is an alloy block adn the rb20 is the cast iron... sr20det has a timing chain rather than a belt.. rb20det is a 6cyl thus more torque

both engines are bloody awesome.. but it always goes down to money in the end... :P

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BOOSTMEISTER Mentor

BOOSTMEISTER

Posted
Posted

That's the big factor in all things I recon...bang for your buck... if you go the rb then you need a engineer cirt because you go from 4cyl to 6cyl......I have personally done this conversion so if you need any tips let me know.

I would probably go for the rb for the torque...

URMINE hows your heater going?

Cam

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S13 Silvia Enthusiast

S13 Silvia

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Posted

Thanks for all your help guys. On the High Performance Imports video Vol 3. (currently being borrowed by me off a friend ;) ), they show a S13 Silvia with a VG30DETT in it. Pretty PHAT I reckon!

And I'm not going to spend the money on my current ca because it is non-turbo. Spending 2k on my current engine, would that bring it up to scratch with a rb20det (serious question)? And I definantly won't be putting a rb25det into it because of the cost.

Also, boostmeister, what has to be fabricated/welded/altered to put the rb20 in the S13? I've heard that the heater hoses have to be altered and besides everything in the halfcut, you'll need a rb tailshaft and a bigger fuel pump in the tank. Is that it?

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REDGTT Grand Master

REDGTT

Posted
Posted

Guys stock for stock The Rb has less toque than the sr20det and will always be less torque. six 8 or ten cylinders dont matter as the stroke on the Rb20det is very very short. Good for revving but thats about it.

Rb25det is the way to go.

Sr20det has a timing chain and roller rocker arm style setup.

Alloy block is light but there is so much alloy there that it doesnt make a big difference.

Rb20det is a tough motor. But so is the sr20det.

I say different strokes for different folks. LOL

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