S14/15 SR20DE cams in a S14/15 DET

[Tom N]

Anyone ever experimented with using non turbo SR cams in a turbo SR?
Exhaust cam is the same but intake has more duration and lift but valve timing is different.
S14 DE cam is 248 duration at 10.00 lift with 130* timining vs DET cam which is 240 and 9.2 lift with 126* timing.

I noticed on a S14/15 DE the VCT stays active till 8k rpms instead of 5700 like the DET. Thats all ecu controlled though.

Any opinions on using the non turbo intake cam? Obviously the added duration and lift is good but what about the timing separation?

Stock cam profiles
Factory Camshaft specs (http://www.tomei-p.co.jp/_2003web-catalogue/e090_camshaft-specs.html)

[Noobles]

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-ash3/7906_202981023225381_632300991_n.jpg

DE Cams in a s15 sr20det
TD06-20g and 20psi on E85

On a Apexi Power FC - VCT was switched off @ 6800 RPM

*43.8 degree ambient temperature that day**

[Tom N]

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-ash3/7906_202981023225381_632300991_n.jpg

DE Cams in a s15 sr20det
TD06-20g and 20psi on E85

On a Apexi Power FC - VCT was switched off @ 6800 RPM

*43.8 degree ambient temperature that day**

Did you happen to do a comparison to the DET cams?
I have a S15 with a 20g also but it made almost 400hp with 93 octane and meth injection at about 23-24 psi with the stock DET cams.
I couldn't tell you the ambient temperature but it was here in Florida where it's hot most of the time. I wish there was a way to switch the VCT off later in the rpms with a rom tune. I have the factory S15 ecu.

[Noobles]

No comparison sorry, it's how it came to the shop.
Holding on the VCT helped keep the power curve up top.

There was more room to go, but the clutch didn't want to go any further... hopefully in a few more weeks it will come back for some more boost.

It's also externally gated on a standard SR manifold.

https://www.facebook.com/photo.php?v=10152136734452095&set=vb.174484729408344&type=2&theater

[Tom N]

No comparison sorry, it's how it came to the shop.
Holding on the VCT helped keep the power curve up top.

There was more room to go, but the clutch didn't want to go any further... hopefully in a few more weeks it will come back for some more boost.

It's also externally gated on a standard SR manifold.

https://www.facebook.com/photo.php?v=10152136734452095&set=vb.174484729408344&type=2&theater


Keep me updated. I have the same 20g turbo. Mines still on internal gate though. That's changing soon.
I can't believe my clutch is still holding up. Car has a SilkRoad clutch with full face disk that's holding 400lbs tq so far.

[Noobles]

No worries will keep you posted.
This car just has a Exedy HD replacement in it at the moment.

[Noobles]

Hi,

Similar setup as previous car, except smaller rear wheel, but billet compressor wheel.

Mamba GTX T518z core in Trust housing, 10cm rear, externally gated.
S15 SR20DET
Z32 box
ARP head studs and Tomei head gasket.
Autech Intake cam only.
E85.

Would really wake up on 25psi, but the customer didn't want to push factory bottom end any more. I would be keen to see this thing on 25psi, as it went from 197rwkw on 11psi, to 269 [360hp] on 20psi

The MAMBA cores we have used with the GTX wheels are great.... they are responding a lot better as well compared to Kando/Trust etc..

http://puu.sh/gglzj/d1876b0d76.jpg