What years of the B15 Sentra's came with SR20DE's?

[2_Liter_Turbo]

I know 2000 and 2001 SE's came with SR's, just curious if there are any other years? I'm new to the sentra world, so I'm a noob Also is there a difference in weight from the SE's to the SE-R's ?

[nametakennow]

Just 00-01 SEs had the SR. Keep in mind that the B15/P11 SR is a different animal than previous generations.

SE's weigh in at 2674lbs, while SE-Rs weigh a little over 2700 and Specs nearly 2800.

[2_Liter_Turbo]

Just 00-01 SEs had the SR. Keep in mind that the B15/P11 SR is a different animal than previous generations.

How so?

[RED_DET]

They have Roller Rocker motors. Different valve train. REdline is a little shorter than the non R.R. motor. They are said to not be able to handle as much boost as the non R.R. motor too.

[nametakennow]

Yes, roller rocker valvetrain leads to a 6750 redline. When modded to rev higher, they are more likely to throw rocker arms past 7000rpm. Additionally, it's said that the pistons and rods are slightly weaker.

Thus, while they make a little more power stock, they need reinforcement and other help sooner when modded. Specifically, past 12psi it's usually recommended that you get new internals. Over 7000rpm you'll need rocker arm stoppers and some patience in case they decide to take a ride.

[2_Liter_Turbo]

So wouldnt it be better to just throw on a low port b14 head on it?

[nametakennow]

You could, but it'd be a bit of a waste.

Any SR head, without modification, may have issues past 7000 rpm, the RR SR is just more likely to.

Additionally, the B14 head would have more miles on it and you wouldn't know how well it'd been taken care off.

I mean, if you're building an NA SR up, sure, swapping heads would be to your benefit. However, IMO, a heavily NA modified DE is a bit pointless. It's doubtful you'll make even 200whp and moreover you can make much more power than that for the same amount of money with DE+T, DET, or VE setups.

[2_Liter_Turbo]

Well, I plan to build an n/a setup on my B13 (my S13 is turbo'd). I was just going to use the standard highport DE because (at least with honda's) the only difference between VVL and a standard setup (when it comes to heads) is that you can have a nice high cam profile at higher Rpm's and a nice "idle" profile, well, at idle. So when building a strong motor, wouldn't it be better to just have no VVL since you wouldn't be worried about Idle, and that is just less crap to worry about breaking under a heavy load? I was going to put in the SR16VE pistons into the SR20DE (heard it raises the compression to around 13:1) and run some JWT cams, and some strong rods/bolts/bearings and call it a day as far as the internals go (also RAS, cam gears, and a good headgasket). My goal is about 230 whp, but with a good tune, I believe that this would be fine. I'm pretty new to FWD SR20's and N/A builds as far as they go, but I have worked for a few years doing honda's, as well as about 3 years doing S13 related car "Stuff". The highport heads do flow better, so I really don't see the advantage of the VE SR's unless you want a nice idle. Please inform me if I am mistaken, because I am still new to this area of Nissans. Lol

[2_Liter_Turbo]

I got to thinking, and I might just buy a GTI-R block and head. This way to get beefier internals, and solid lifters. I can just swap out the pistons for the SR16VE pistons and retune the ecu (have a SAFC also) to run it. Would that be a better solution (mainly for the solid lifters)?

[nametakennow]

Honestly, I doubt any DE setup with some regular NA mods plus SR16VE pistons will do the trick to get 230whp. A full SR20VE will hit that with some mods, but just a DE I don't think so.

Even with solid lifters, you'd have to have a crazy rpm limit to take advantage of such a high compression.

I could be wrong on all of that, but 230whp is asking quite a lot from an NA SR. Plus your powerband would suck, I'd think.

[RED_DET]

Good luck getting 230whp out of a NA setup, to include a VVL setup. YOu better start with the 20v, it has 205bhp stock. But you would need a real good tune to push that 205bh to at least 270bhp. I personally don't see it happening without the help of N20. Hell if you really want some power, goes this route here:

Straight from Andrea Miko"Here is a cheap VE-T combo that will clear 450-480 WHP easily at 20 PSI.

SR16VE motor $1000

SR20 cam gears set at -5 In, +5 Ex

SR20DE crank $100

SR20DET rods $100

SR20DET pistons about 9.3-1 compression New with rings $280 or used $120

SR20VE steal head gasket from Mossy $85

New Crank and Rod Beaings $270.

N1 intake and TB from Mossy $450

740cc side feed injs $540 on EBAY

T3T04 Turbo .63 turbine, stage 5 wheel with 60 trim or larger compressor wheel.

Turbo Manifold Log or equal length $400-$800

That will net 450-480 WHP at 20 PSI all day with no stress.

This comes from the assumption that DET guys make 400-420 WHP at 20 PSI. The VE with better head and bigger cams will net an xtra 50 WHP while costing less to build"

[2_Liter_Turbo]

Ok, what is the 20v? Also, I have my S13 for Turbo, I want to stay all motor with the B13. I don't see why people think 230whp is so unattainable with an SR. My buddy has 210whp with his B20Vtec, and he's on stock internals and cams, so why would an SR20 with SR16 pistons, cams ect not produce similair results?

[RED_DET]

The 20v is a very very rare motor that was produced for only 1 yr. Apparently it drops into the B15 chasis with ease, but requires alot more wiring fab to work in a b13-14 chasis. So, with that in mind, don't even bother with the 20v. I'm sure the VE can probably put out 230whp, but it is no small leap. It will require every trick possible to extract that type of power. If you can get 190whp out of one, I would be very happy with that. From all the numbers I have seen, 180-190 is the average. Some are even lower. I myself can't see spending the cash for that type of power on a NA motor, when turbo can be done cheaper and endless amount of power. I know you have one turbo car and don't want another. In that case by a JDM NA Highport motor, stick some S4 cams in there with header and exhaust and spray a 50 shot and make just as much or more power than the VE all day long, alot cheaper once again. Me personally, I'm wouldn't drop over 2500 for 190whp. Just doesn't make since.

p.s.The VE head flows alot better than the DE head, all day long. Thats why it makes more power stock for stock.

[nametakennow]

That pretty much sums it up.

Why the SR would not produce as much power as a B20 vtec is an interesting question. I'm honestly not sure, but I suspect it has to do with the SR being designed to have more torque than Honda motors, the trade off being less peak hp.