RB and SRDET

Post by **batty** » Wed Jun 30, 2004 7:12 am

What are the major differences between these two engine types. The RB and the SRDET. Obvious they are from different cars. Skyline RB and the Silvia for the SRDET but whats the differences in reliability and engine in internals. I am ready to purchase a S15 motor but i want to make sure its the best choice for me (engine , reliability and mod friendly wise).

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

SR == 4 banger, turbo, all aluminum engine. Came in the Silvias and the 180s. It's a good stout little engine with forged internals from the factory. There were three generations of the engine the S13 had a high flow head and a T-25 turbo. The S14 and S15 motors came with a low port head, but had VTC integrated into the intake cam. They both had T-28 turbos. They also had a revised water pump and oil pump design that improved cooling effeciency of the motor. The S14 had the strongest transmission of the group, and the S15 came with a relatively weaker 6 speed transmission. The S13 and S14 motors came with 370cc injectors and the S15 had been bumped up to a size that I can't remember.

Any SR is reliable up to 450 horsepower on the stock bottom end. I think secret services was pushing nearly 500 on the stock bottom end not too long ago.

The RB is an inline 6 motor that came in 3 sizes. 2.0 liter, 2.5 liter, and a 2.6 liter. The 2.0 liter was found in the cefiro and had one T-28 turbo. The 2.5 liter was found in the base skyline with a single turbo. The 2.6 was the GT-R's engine and came mated to a 6 speed, AWD transmission and had dual turbo setup. The RB is definitely a more stout block than an SR due to it's cast iron make (aluminum head), and takes to modifications easier than an SR. If I were building a car for straight line performance, an RB would be choice.

Post by **batty** » Wed Jun 30, 2004 7:12 am

very good information thank you.

Post by **batty** » Wed Jun 30, 2004 7:12 am

i am looking for decent power some in 300whp range. use for track and drift . Just a little undecided right. s15 seems like a good choice

Post by **SeVa-S13** » Wed Jun 30, 2004 7:12 am

The SR is very capable of 300, especially the S15 (if you can wire it), plus it's easier to fit than an RB.

S15 SR's had 400 somthing CC injectors.RB20DET's came in R32 Skylines, Cefiros, and Z31 200ZR's.RB25DET's came in R33 and R34 SKylines. (and the Stagea, but we won't get into that pimpster)RB26DETT came in the R32-R34 Skyline models with slight changes between each.

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

300 HP is very attainable on any nissan engine. The only thing I don't like about S15 motors is how much they cost. You will plunk down a lot of change on that motor set. Also wiring it is very hard. I haven't found a complete wiring diagram for it yet.

Blake: I'm digging tah_Hammer. He's dancing to dirtty vegas perfectly right now

Post by **SeVa-S13** » Wed Jun 30, 2004 7:12 am

Can't touch it.

Post by **D1SR240** » Wed Jun 30, 2004 7:12 am

S15 SR has 480cc injectors. Can anyone actually prove that the six speed S15 transmission is weaker, I have heard quite a few times that it is, but have never actually seen anything notable to that theory. So if anyone can actually prove why it is weaker please let me know.

Post by **240kindaguy** » Wed Jun 30, 2004 7:12 am

hey, i dont actually own a 240 but have been studying them for quite some time. for 300rwhp straight lines and drifting i would go with the s-14 if an engine swap is what you are doing. However, save yourself a little time without your car and just turbo your ka, they have displacement on the sr and its around the same to turbo the ka as it is to swap.

Post by **240kindaguy** » Wed Jun 30, 2004 7:12 am

http://www.xatracing.com/RB_SWAP_info.html

i found this, maybe it will help you.

Post by **240kindaguy** » Wed Jun 30, 2004 7:12 am

i found this, maybe it will help you.

http://www.xatracing.com/RB_SWAP_info.html

Post by **MECPInstaller** » Wed Jun 30, 2004 7:12 am

the six speed transmission weaker is new to me to. Would love to learn more about it. Also how come the s15 sr is so hard to wire compared to its earlier models? Back when I was going to do a swap I was really intrested in the s15 engine because of the six speed transmission and increased stock power output.

Post by **240kindaguy** » Wed Jun 30, 2004 7:12 am

april 2004 car of the month has the turbo ka and obviously it works.

Post by **easymmkay240sx** » Wed Jun 30, 2004 7:12 am

Why would an RB only be good for straight line? PSshaw. Ever seen an RB25 powered S13 in action? I have and it's just plain awesome. I believe someone had done some corner-weighing with an RB25 vs stock a while back and it hardly dented the weight distribution.

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

MECPInstaller wrote:the six speed transmission weaker is new to me to. Would love to learn more about it. Also how come the s15 sr is so hard to wire compared to its earlier models? Back when I was going to do a swap I was really intrested in the s15 engine because of the six speed transmission and increased stock power output.

Nissan crammed a 6 speed gearset into the same size gearbox as the 5 speed. The gears got cut a bit thinner, IIRC. The S14 is considered the strongest because it got slightly beefier bearings and synchros than the S13.

S15s are hard to wire into S13s because of ODB2. If you've ever noticed, it's harder to wire in engines that do not match up to the generation of the chassis.

Post by **MECPInstaller** » Wed Jun 30, 2004 7:12 am

ahh thanks for shedding some light on that, good info.

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

easymmkay240sx wrote:Why would an RB only be good for straight line? PSshaw. Ever seen an RB25 powered S13 in action? I have and it's just plain awesome. I believe someone had done some corner-weighing with an RB25 vs stock a while back and it hardly dented the weight distribution.

Ok. Do this. Go get 180 pounds worth of weights and find someway to anchor them in your engine bay. Now, take the car and try to flog it. The car will definitely be front biased in weight distribution. That will help in activities that you want weight transfer to happen (drag and drift) but on a road course, a lighter, more even distributed car will own an RB powered 240.

Post by **MikeLHP** » Wed Jun 30, 2004 7:12 am

i cant say how long ive been wrenching on 240's and quite some time with the SR as well the RB. it just depends on the person. though if I had a nickel for everytime this was asked I would have enough to pay off my tuition. lol.

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

MikeLHP wrote:i cant say how long ive been wrenching on 240's and quite some time with the SR as well the RB. it just depends on the person. though if I had a nickel for everytime this was asked I would have enough to pay off my tuition. lol.

If I had a nickel for everytime I've SEEN an SR v RB thread, I'd be rich.

But I agree, the ultimate decision rests in the person and what he thinks will suit him best. If you can get a chance to sample what a swapped car can do (for any of the swaps), then you'd be ableto make the perfect choice for what you want. I get kids asking me all the time if they should put an SR in their 240. What I do is take them out somewhere, let them drive around and come up with their oqn conclusions.

Post by **Nismo_Freak** » Wed Jun 30, 2004 7:12 am

easymmkay240sx wrote:Why would an RB only be good for straight line? PSshaw. Ever seen an RB25 powered S13 in action? I have and it's just plain awesome. I believe someone had done some corner-weighing with an RB25 vs stock a while back and it hardly dented the weight distribution.

Don't confuse cornerweighting and actual static weight balance.

With adjustable coilovers you can lower the rear to redistribute excess frontal weight to the rear. With enough adjustments you can effectively cornerweight an RB powered S13 quite easily.

However cornerweighting doesn't eliminate the added weight from the RB engine, nor does it eliminate the requirement for adequate suspension travel. So in the long run cornerweighting only attempts to minimize the effects of the added weight, but does not make it equal. It is silly to think that an RB powered S13 will ever be equal with an SR powered S13, ceteris paribus. To do so would be to deny the estabolishment of physics and reality.

Post by **SeVa-S13** » Wed Jun 30, 2004 7:12 am

Ok, why didn't I gets to drive it when you was here?! *cry*

Post by **Nismo_Freak** » Wed Jun 30, 2004 7:12 am

SeVa-S13 wrote:Ok, why didn't get to drive it when you was here?! *cry*

English, do you speak it?

Post by **[Zero-S]** » Wed Jun 30, 2004 7:12 am

:owned

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

SeVa-S13 wrote:Ok, why didn't get to drive it when you was here?! *cry*

i hope that was aimed at me

and the answer. Cause you were too lazy to get it running while i was there

EDIT: if that was to ask why you didn't get to drive my car. I was in a hurry to go get drunk at Kristen's friend's birthday party.

Post by **SeVa-S13** » Wed Jun 30, 2004 7:12 am

tenkawa_akito wrote:EDIT: if that was to ask why you didn't get to drive my car. I was in a hurry to go get drunk at Kristen's friend's birthday party.

Bingo.

What ain't no country I ever heard of.

Post by **PantherRacer** » Wed Jun 30, 2004 7:12 am

I'll jess leave dis one alone lol

Post by **D1SR240** » Wed Jun 30, 2004 7:12 am

tenkawa_akito wrote:Nissan crammed a 6 speed gearset into the same size gearbox as the 5 speed. The gears got cut a bit thinner, IIRC. The S14 is considered the strongest because it got slightly beefier bearings and synchros than the S13.

Thank you for the info tenkawa-akito. But if it is the same size then why can't it bolt up to an S13 or S14 SR engine. Also sinve the S14 transmission is stronger than the S13 one can the S14 transmission bolt up to the S13 SR?

Post by **Hijacker** » Wed Jun 30, 2004 7:12 am

I thought the S15 bellhousing shared the same bolt patterns as the other generation SRs. I've heard of people (never actually seen it first hand) swapping S14 trannies over to their S15 blocks. My friend has an S15 block sitting in his garage, so I'll take a look one day at the bolt pattern and compare it to an S13.

RB and SRDET

RB and SRDET

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