This post focuses on the results of adding turbochargers to an otherwise naturally aspirated Z32. We look at two setups, one of which a full blown NA-T build stock internals and stock turbos . The other is a a budget minded NA-T conversion. Both had interesting results on normal 93 octane gas however we were completely surprised by what E85 could do on a NA-T setup with full breather mods. We will be testing several such combinations in the near future and will post them up

The Budget NA-T

This car simply had all the stock twin turbo setup bolted on to a NA block. The only upgrades were

2.5 inch turboback exhaust

Single Pop JWT intake

The stock TT components were

Stock Intercoolers

Stock Intercooler piping

Stock 370cc twinturbo injectors.

Stock twinturbo pump

What we found rather quickly was that even running a fairly lean 12:1 AFR we were maxing out the 370 cc injectors at wastegate pressure of around 7 psi or so. The car made decent power topping over 300whp while remaining extra conservative on timing. I feel at the very least anyone venturing a NA-T swap should definitely consider upgrading injectors if the want to take full advantage of the upgrade. We found that the power builds progressively and does not fade at all. We hit target boost rather quickly by 2800 rpm. We also found as the revs increased we had a bit of boost creep with the boost climbing by 2.5 psi by redline. since there was no boost controller in play I assume this is simple creep due to the efficiency of the high compression setup.

Dyno

The full breather NA-T

This car has it all. Fresh built NA compression Z32 motor with the following upgrades as listed below.

Stock NA bottom (pistons and rods) with TT wrist pins.

Stock 48 P heads gasket matched

Stock cams d egreed with bde exhaust cam gears

Nissan Stanza throttle bodies

Ash planar intake piping

Ash 2.5 IC piping

Ash massives intercoolers

Nismo 740cc

Greddy Profec 2 boost controller

Selin dual intake

D w300 e85 fuel pump

S tock manual turbos

MSP manifolds

3inch Downpipes

3 inch test pipes

3 inch catback

Max pump gas vs E85 and same boost as max pump gas

Pump gas topped out around 408 whp and 382 ftlbs at 13 psi. That’s the max we could run before knock. E85 on the same boost allowed us to feed back timing and pick up plenty of power are evidenced above. 460whp and 406 ftlbs. Interestingly torque stayed a bit low at the lower boost levels. In my opinion that maybe due to the Greddy profec 2 boost controller which has documented issues controlling boost on twin turbo Z32’s.

With the boost turned up on E85

This was the result that shocked us. I knew we would make power but to blow away the stock turbo record by a mile was astounding. Its a shame the single fuel pump we were running was not capable of supplying more fuel otherwise with a little tweaking we would have broken the 600 whp mark. Regardless 581 whp and 600 ftlbs was beyond what we expected. It took a well put together motor and a little out of the box thinking to crack this barrier. The owner will be back with additional fuel upgrades to crack 600whp level. As you can see the turbos are unable to keep up with the airflow requirements with the boost dropping quickly after 5500 rpm.

In conclusion, it appears with E85 here to stay NA-T setups are going to be more common and should be here to stay. Stay tuned for more results