2001 Nissan S15 200SX Spec-R

[bahaimus]

Have to admit, Jon's engine bay work on Australia's forgotten muscle car was a big inspiration for the bay work I did on Kermit. Can't wait to see this thing disrespecting the neighbours. :D

The ET?

[psi999]

I don't mind the Nissan cover if you can get rid of the white v6 3000 turbo on it. Otherwise option c

Yeah, just not too sure. Think its all a bit too large….. Certainly looked a lot better in my head before I cut it all up.

When I get the Merc back, feel free to come around and help me work some detailing magic on my engine bay!

Sure, happy to help.

Have to admit, Jon's engine bay work on Australia's forgotten muscle car was a big inspiration for the bay work I did on Kermit. Can't wait to see this thing disrespecting the neighbours. :D

Cheers mate, few things I learnt on that car have made a reappearance on this car

option z find a big factory airbox to stuff in there

In a perfect world that would be fantastic, reality is the air filter is massive (from a truck) so very doubtful id find anything fit for purpose (taking into consideration the MAF placement and BOV return).

[Dimi]

looks farken good mate, but everything is jammed in there so tight!

i see you have used braided flex for your crossover pipe. i hope for your sake it doesn't decide to incinerate/melt on the internal side and lunch the turbine wheel. as i have seen on a few cars over time.

the SS bellow you used for the gate would be better suited to use in the runner

[dab.of.oppo]

I don't mind the Nissan cover if you can get rid of the white v6 3000 turbo on it. Otherwise option c

I think this. Remove lettering and paint the same black as the other piping.

[psi999]

And engineered :D

Dimi, i'm using a Nissan factory braided flex (as used in the stock turbo crossover pipe), not a shitty aftermarket one - hopefully this will hang together!

[piss98]

Woot - where's da skid pics bro!

+1 on engine bay tidy up help. You could start a business! :p

[psi999]

So still chipping away at this POS.

Next step- fire the ECU properly and get laptop connected

To get this sorted I had to run an extra wire to the Nissan CONSLT plug, the Australian delivered 200SX’s for some reason (and the only Nissan I believe) only run the following 4 wires.

- TX
- RX
- Ground
- 12V

Every other Nissan also requires an additional ‘CLK’ / clock synchronisation wire, so I ran this from the ECU to the plug and fired up the laptop – she connected straight up and was able to start pulling the ECU maps.

Testing all sensors it became apparent the XF falcon TPS I had installed was faulty (not smooth in operation, output voltage jumped around a little), so swapped for a spare (well one of tim510’s spares) – was faulty as well. Not surprisingly though as even when new XF falcon TPS’s were regarded as shit…. 25 years on certainly a hard task to find a decent one (as a new one is over $200).

But I had bigger problems. The output of the stock Nissan TPS (and all Nissan TPS’s) should run from about 0.4v to 4 – 4.5v (less than ~0.5v will throw the ECU into ‘idle’ mode – pulling off the main fuel map).

The XF TPS bolted up as standard gave an output range of 1.3v – 5.1v. As Nistune has no TPS recalibration the ECU would have never found ‘idle’. To resolve this I lengthened the TPS bolt holes to allow the TPS to rotate for the sensor to kick the idle map at around 0.4v. Whilst this worked the TPS at full throttle would only see 3.3v, not the 4v as required – even a new sensor was not going to resolve my issue.

So decided to try and adapt the stock sensor to the XF throttle body.

Firstly I removed around 10mm from the end of the throttle shaft then drilled out the stock pin and replaced with a much larger diameter / longer pin…. Trying to replicate the stock throttle setup.

Then made up two plates, one plate to bolt to the throttle body (with recessed M5 screws) and an other much larger plate to house the Nissan TPS. Both plates were joined with 2 M6 bolts.

After much grinding, drilling / tapping holes here she is.







Perfect 0.4v at closed throttle and 4.01v at WOT. Probably the best thing I’ve ever made in my garage... Really happy with how it turned out and works a treat.

[tim510]

Looks good! How did you cut the alloy?

[piss98]

Looks pro Jon nice work!

[psi999]

Cheers mate, im pretty surprised how it turned out - never really made anything like this before so kind of designed it in my head as i went.

Looks good! How did you cut the alloy?

With my 5" angle grinder in the backyard holding it with vice grips - LOL.

[denmaster]

nicely done and very shiny for 5" grinder!

[I'm DJ!]

Looking sensational mate!

[psi999]

So after an epic week of sorting (re-welding fuel rails due to leaks), unable to get oil pressure (thankfully sorted now) and wiring completed, well enough to start - SHE RUNS!!

Starting off the key (epic fan belt sequel due to coolant overflow)



Idle, 14.7:1 on the meter - loving those cams, sounds infinitely different than a stock cam VQ30 (230 deg Vs 265 & about another 1mm lift)



And a bit of a rev, no tune so bit of fuel on over run



Freaking stoked!!

[clutch-monkey]

sounds sweet, will sound tits under load no doubt!

[TD302]

Good stuff. Looks awesome love it.