Thread: Autech GTi -SR20DE UPDATES

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2012-04-05 06:48:49

#111

Vex630

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Originally Posted by STRATTON

mike did it agian recently, with dai's car. i think he did 196 or something.

id have to search for the build, it may be on motoiq i remember talking to him about it when he posted it on face book.

stratton.

I thought Dai drove Mikes DE B14 car and Mike drove the VE B14?

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2012-04-05 10:38:28

#112

SR20-AUTECH Online/offline status of SR20-AUTECH is unknown

N15 Autech GTi

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Originally Posted by Vex630

I was talking about my DE. If I wanted the compression bump that the stock autech bottom end gives I'd be spending more money than you because I have a USDM DE with 9.5:1 compression. Also, I didn't know you got the Janspeed head for free.

Does the B18 header bolt up? I'd like to see 200whp out of a DE again. Haven't seen one since Mike K and his Dog Car.

Ref the Janspeed Head, you got me there! It wasn't free.

The B18 header needs a bit of work to make it fit. Its not just a case of swapping to an SR head flange as i'd hoped. Its also quite tight between the engine brace and sump, so i decided to modify the secondaries to group them closer togother in order to fit in that space.

Originally Posted by JimmyNX

Considering the head porting on the engine, the independent throttle bodies...

Please use the C6M cams. I had forgotten about these.

I want a 250whp DE. I would not worry about the idle, as you can just bump it up. If this is a daily driver, forget it. But if it is a street legal toy.. i dont see any reason not to.

Do you have any head flow test #'s from this head?

*edit * The only major limiting factor i see here with going all out on this is the compression and fuel availability. you are running VE pistons with probably no custom valve reliefs, so C6Ms may not even clear that. However if you ditched them and went to a 13:1 CR setup the C6MS might be worthwhile.

The car is used pretty much daily, so I don't think i'll be going to the C6M.
13:1CR on our UK 99RON with these JWT C3 cams should be okay.

I havent had this head flow tested, i would like to get some numbers..so we'll see.

The pistons i'll be using are a set of used CP 12.5:1 VE items, they have deep valve reliefs so no problem there.

Anyway, the main update here was the Tri-Y header fitment...the other plans with pistons and ITB's are a little while away. I will keep you guys posted as and when something happens.

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N15 Autech GTi
OLD SETUP - SR20DE -JWT C3's /JANSPEED Prepped Highport Cylinder Head / Mazworx Header - 13.8@100mph
OLD SETUP - SR20VE - SR16VE Pistons / Non N1 SR16VE Cams / Custom 4-1 Header - 13.6@102mph
NEW SETUP - SR20VE -SR16VE Pistons / N1 Cams / 421 header / Custom Centre Fed Manifold/ Q45 TB - 13.1@107

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2012-04-05 11:44:27

#113

TheSam

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YES!!

super glad to see you have picked up those throttle bodies

Are you going to use the plenum that was being made for them?

still going to stick with the Dastek?

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2012-04-05 11:59:30

#114

Doctor G

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Looking forward to the new numbers. Good luck. Loving this DE. My brother in law has a pretty kick as built DE with ITB's too and it's right up there wiht N1'd VE's.

I will be keeping an eye out for your results if you don't mind. I have a custom 4-1 on my built ve now and my primaries look almost the same lenth as those in your pic. If you get good gains with this I will remove my 4-1 merge, and make up 2 x 2-1 merges there to basically convert to tri-y.

ps, are those primaries equal lenth exactly? and what diameter are the primaries and secondaries?

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2012-04-05 13:53:19

#115

jagy

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Originally Posted by Viprdude

I also believe the Nismo cams you order from the Nissan Motorsports catalogues are nothing but JWT S3 cams. (Check the part number and you will see S3 in the part number) Same with the Nismo sway bars. They are Suspension Techniques. Common practice for Nissan to use something else someone already created, slap Nismo on it and collect a premium.

No, you are comparing something totally different...

US Nissan Motorsports
US JWT

and

Japan Nismo

He propably has real Nismo cams. Good thing about JWT cams for DE is, that it doesnt matter if its mild S3 cams or big cams like C3, all for same price... and stiffer valve springs are really cheap for DE. This setup has potential to be really good.

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2012-04-05 20:20:40

#116

TheSam

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Its really good right now, its an animal of a car

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2012-04-05 22:06:40

#117

SR20-AUTECH Online/offline status of SR20-AUTECH is unknown

N15 Autech GTi

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Originally Posted by Doctor
Looking forward to the new numbers. Good luck. Loving this DE. My brother in law has a pretty kick as built DE with ITB's too and it's right up there wiht N1'd VE's.

I will be keeping an eye out for your results if you don't mind. I have a custom 4-1 on my built ve now and my primaries look almost the same lenth as those in your pic. If you get good gains with this I will remove my 4-1 merge, and make up 2 x 2-1 merges there to basically convert to tri-y.

ps, are those primaries equal lenth exactly? and what diameter are the primaries and secondaries?

Cheers dude, would like to hear more about that ITB DE setup and management.

With the Tri-Y, when modified and routed this way, Primary 1 and 4 end up being slightly shorter by around 2-3" i believe.

The big tube Tri-y header has stepped primaries that are 1.75",1.875", 2.0" O.D.

The secondaries are 2.1".

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2012-04-06 02:38:04

#118

Kyle

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lol

Originally Posted by jagy

http://www.nissanusa.com/nismo-web/Nismo-Motorsports-Catalog-2010.pdf

Page 55.

13020-SR20S3 -- Camshaft set with .442"/260* high performance for the SR20DE; improves mid-range.

I understand that is the US catalog.

From JWT....

Jim Wolf Technology website

If someone could give out some specs or a part number, that would certainly help, wouldn't it, jagy?

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2012-04-06 11:26:06

#119

jagy

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Did you read it? I did said nothing about JWT/Nissan Motorsports cams. I was talking about Nismo cams, no rebranded JWT cams sold by Nissan Motorsports USA. It has nothing to do with Japan Nismo cams.... got it?

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2012-04-06 15:15:52

#120

niZmo

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