Performance intake for SR20VE 20V?

[Roman@SRC]

Hi,

Do you guys have any advice on getting 20V intake to perform better than OEM one?

I have 20V on rails to be installed in my NX in a short time. I will put lightened flywheel and carbon clutch at first, then I want to change cams to N1 grind.
After that, I will rise a compression a bit.

I look into 9-9,5K rev limiter setting, so I can run 1/4 as quick as possible with my short (4.4:1 final drive) SR16 transmission.

Ok, any thoughts on intake side?

Roman

[Jason@JGY]

We have not even had a 20v in the building before. I really don't have any advice for it. Stateside here..........the 16v is about the only one available.

Could you post some pictures for us to see?

[Roman@SRC]

Sure, the photos following.

BTW, it is still 16 valves design. It is known under 20V nickname because of it is found only on JDM Nissan Primera P12, "20V" model modification. It is rare modification 08/2001 - 04/2002 model year.

Internally it is the same as SR20VET engine, the only difference are NA pistons which brings CR to something like 11:1.

Ok, photos of engine head (not mine) and photos of intake (mine) are followed.

[Jason@JGY]

...............question...............

In all my years of selling these motors................I don't know how many times that we have been asked if they are 20 valve motors.........after we answer, they say that they will get it somewhere else.

...........so are they 20valve VVL?'s is not, that is just great! not

[Roman@SRC]

Jason, they are 16 valve VVL motors. But they are much advanced than usual SR20VE.

[Jason@JGY]

that's funny

I bet I have personally talked to about 60 people that have wanted a 20 valve VE, and I have lost the sale because we don't have them. I always wondered how Nissan drastically changed the head design to get an extra valve in there..........it's funny to hear that all those people were wrong

that's what internet forums can do to people.........give them wrong info

so to set the record straight..........are there any 20 valve 4cylinder SR's out there?

[Roman@SRC]

There is NO 20 valve SR's at all.

Remember, ALL SR20 engines are 16 valve design.

SR20VE 20V modification has a really advanced head design and a huge headflow vs original SR20VE head.

SR20VE 20V has individual coil packs vs distributor on regular SR20VE.

SR20VE 20V has morse chain vs regular chain on SR20VE.

And many many little modifications which leads to more reliable, more advanced engine specs.

[NathanM]

I spent a lot of time looking for one of these motors and could really find anywhere to get one, where did you find it?

Are you confused Jason or just making a point?

[Roman@SRC]

Nathan,

I found it at a junk yard in Vladivostok city, it is Russian city situated near Japan.

BTW, I live in Ukraine, it is many thousands miles from US, it is many thousands miles from Vladivostok also... :)

I have no reasons to confusing Jason. If you have any questions regarding this engine - just ask me.

[NathanM]

That's very cool man. When is it going into a car and what are you putting it into?

[Roman@SRC]

It is going to car as soon as lsd driveshafts and fidanza flywheel to arrive to me from JGY.

It will be installed in my Nissan NX2000.

[Jason@JGY]

It is going to car as soon as lsd driveshafts and fidanza flywheel to arrive to me from JGY.

It will be installed in my Nissan NX2000.


What is the difference between the normal SR chain and the chain on this motor?

I would not think that an intake would help on that motor. On the SR's, I think that the intakes really only help much on the turbo'd SR's. If money was no object and I could make an intake for you for $1k and it made you .2 HP, then you would like it, but in my opinion, you could be faster by just eating less fatty foods.



I wikipedia'd it and this is what it said "The second variant of the SR20VE is found only in the 2001 and up, P12 Nissan Primera (http://www.jgyforum.com/wiki/Nissan_Primera). This version of the SR20VE makes 204 hp (152 kW), and 152 lb/ft torque. This engine is commonly known as the SR20VE '20V'. Although, in automotive terms, '20V' would normally be interpreted as having twenty valves, this is incorrect. The name '20V' is the name of the trim level of the Nissan Primera that it is found in. It is also a shortened version of the name SR20VE (http://www.jgyforum.com/wiki/Nissan_SR_engine#SR20VE). This engine has 16 valves like the rest of the SR20 engines. This newer '20V' engine, is the only SR20 (http://www.jgyforum.com/wiki/SR20) engine to get a restyled valve cover (http://www.jgyforum.com/wiki/Valve_cover). It also has an upgraded intake manifold (http://www.jgyforum.com/wiki/Intake_manifold), which has longer runners and a larger 70 mm (2.8 in) throttle body (earlier SR20VE has 60 mm)."

read more here: http://en.wikipedia.org/wiki/Neo_VVL

I wonder if the cams are different? If they are the same, I would be surprised if it made more power than the normal VVL with just an intake and TB. The normal is a good size. Also............what about the valve springs? Are they stiffer than the factory ones?

[Roman@SRC]

Ok, the chain is morse drive chain, it's more like drive belt in your CVT unlike usual bike-chain in old-school DE or VE.
http://217.34.53.228:9876/uploads/chain.jpg

The cams are different, as far as I know:
SR20VE SR20VE 20V SR16VE N1

Intake cam
Low lobe, mm lift @ duration 8.40 @ 220 10.10 @ 228 8.40 @ 220
Low lobe center angle, deg 110 114 110
High lobe, mm lift @ duration 10.70 @ 264 12.00 @ 278 12.00 @ 288
High lobe center angle, deg 104 114 104

Exhaust cam
Low lobe, mm lift @ duration 6.60 @ 244 8.30 @ 244 7.95 @ 244
Low lobe center angle, deg 122 106 122
High lobe, mm lift @ duration 10.34 @ 268 11.15 @ 280 11.90 @ 288
High lobe center angle, deg 114 108 110

It has not just restyled valve cover, the head casting is different. The older SR20VE and SR16VE has the same casting. But 20V gets improved head casting, it is proved by some headflow data people post in internet.

I don't know about the valve springs, but the valves much lighter and the cams slightly bigger. Anyway, I'm planning to put N1 cams to test.

PSSSS: I don't eat fatty foods. My weight is 130 lbs, so I'm tuned! :)

[Jason@JGY]

that's really good info! yeah, with the different cam specs, I can see where the extra power comes from

thanks for that info!

the chain is interesting..........what is your theory on it? less HP loss? less stretch?

[Roman@SRC]

This chain is much reliable than old-school one. My goal is climb in rpm range as high as possible, because our gearbox ratios is far from ideal, so reliability is the key to hold that rpms.

BTW, I have broken my NEW (old-school) chain in my built DE a couple of years ago. So I hate these chains, I hate these old-school rocker arms (in DE they always fail).

[Roman@SRC]

BTW, SR20VE 20V is the first native 2.0L VVL motor built by Nissan.

Like someone said The VE motor was designed from intake to timing events to header to be a 68mm stroke. The 20VE is an afterthought and it shows in the lack of power.

[NathanM]

Is there any chance that JGY will stock a few 20V motors? I want to put one in an NX2000 this summer.

[Jason@JGY]

doubt it........it may happen, but I am not sure..........the motor market changes all the time

[NissanCrazyEric]

I have a set of the 20V cams on my shelve.....

[Jason@JGY]

what's that mean?

[Jason@JGY]

crazyeric............you alive?