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Vg30DET information


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#1 New 2 z

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Posted 28 July 2015 - 12:01 PM

This is all the information i have been able to gather for a VG30DET not a vg30et not a vg30dett. I'm making this thread to help future vg30det people and future swaps this information is mostly shrouded in mystery and information for the single turbo twin cam monster is seriously scarce.

There 2 types of vg30dets series 1 and series 2.

Series 1s have black intake manifolds and red valve covers, they don't have knock sensors, they dont have recirculation valves, some turbos are journal bearing or ball bearing depending on model. However they are bigger then rb25 turbos and vg30et turbos i will post specs when i have a chance and when I get home. These motors are believed to make 230hp at the crank despite what wiki says however theres no hardcore evidence. Most of these motors came in luxury nissans in Japan ans they are just hard to get ahold of.

Series 2; they have a black intake manifold cover with a unpainted upper intake manifold and silver valve covers with knock sensors and they do have recirculation valves. These motors are believed to make 250hp crank again there's no evidence behind this statement they can make 120 crabk hp for all i know though i doubt it.

The series 1 and 2 share the same cylinder heads. 45v regardless of year. Upper and lower intake manifold are also the same, the vg30det's use a top side feed fuel rail setup like the 87-89 z31 300zxs na/turbo. Vg30det's also run 270/260cc injectors stock. Impedance has not been confirmed yet i will get to that. (I have a series 1 and 2 vg30det)

All vg30dets have bigger intake ports then z32 vg30de/dett from 89-1999, vg30dets have a unknown compression ratio i have speculation that series 1 is 8.3:1 and series 2 is 8.5:1 with makes sense considering the power drop with series 1. Vs series 2.

Vg30dett/de vs vg30det the blocks are different vg30 twin turbo and na blocks have a casting of 30p the det is a block casting of F65 whether its stronger or not I'm not sure. I know nissan doesn't change casting numbers unless a change was made like non turbo 30p heads vs twin turbo 40p heads vs 48p tt heads vs 45V det heads.

Vg30det have a side mounted starter just like the z31s.

I will get more information and pictures as it comes
1984 Z31 GL- aka the white gost; HX35, S13 2 row radiator, 250MM flywheel, ACT clutch kit, 450CC injectors, intercooler, poly bushings ALL around, new engine, MSD ignition, tuning system, more to come.

#2 Pdfflyer

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Posted 26 February 2016 - 06:08 PM

We look forward to your continued documentary on the

       RARE VG30DET Dual Overhead Cam, single Turbo V6

Who in the US is capable of maintenance on this engines heads, and valves ?

Can these engines be serviced by the US Nissan Dealers network ? or JDM Sources

    Any specific dealers of which you are aware ?

There are a few US Contributed videos on YouTube, but no one ever replies with usable information.

   Best kept secret is where you can find an uncut wire harness, and a suitable ECU to couple with these engines.

 Most wire harnesses were cut in Japan ? 

What are the ECU Numbers available for these VG30DET Engines ?

Any information    would be appreciated.

  Regards,  PDF


Paul 300ZX Cars

#3 260DET

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Posted 17 March 2016 - 10:46 PM

I played seriously with a VG30DET about ten years ago, the most important differences between them and the VG30DETT are obvious visually, there are no real secrets. The heads are good, some say better than the DETT's, the stock exhaust manifolds are also good. The inlet manifold setup is rubbish, mine was all custom including the top feed injector rails which were an absolute nightmare to get right and fit, with that and a GTX35/82R turbo did 420hp at the wheels on 15psi boost.

 

Good luck to anyone who plays with these, they are basically an excellent engine but it's the external detail that will drive you mad if you want real power.


Edited by 260DET, 18 March 2016 - 02:38 PM.


#4 JelmerPatrol

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Posted 20 October 2016 - 01:28 AM

I can get my hand on one of those very cheap. Do they have variable cam timing?


83 Datsun Laurel L24--->VG30DET in progress

84 Nissan Patrol L28E--->L28ET in progress

 

http://www.patrol4x4...holland-314225/


#5 Stano71

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Posted 28 October 2016 - 03:04 AM

I can get my hand on one of those very cheap. Do they have variable cam timing?

They DO have variable cam timing. 



#6 Stano71

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Posted 28 October 2016 - 03:24 AM

The chopped harness is the biggest hassle, dropping this one in my z31 at the moment nearly there just need to sort wiring. using a z32tt auto  harness and ecu and airflow, z32 na flywheel to fit 71c gearbox(bellhousing) and 4.11 diff .it is impossible to find a wiring diagram but I have almost completed tracing all the wires out. Will share MY wiring config/ diagram when engine is running correctly as it seems like nobody else has documented it .

maybe others who did this swap had a good harness to start with?

anybody got more info they would like to share? Wiring diagram would be great  :)

Attached Files


Edited by Stano71, 28 October 2016 - 03:33 AM.


#7 JelmerPatrol

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Posted 29 October 2016 - 07:18 AM

I'm going Megasquirt with mine so no wiring diagram.

83 Datsun Laurel L24--->VG30DET in progress

84 Nissan Patrol L28E--->L28ET in progress

 

http://www.patrol4x4...holland-314225/


#8 Stano71

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Posted 29 October 2016 - 06:09 PM

I found some good info at this Japanese(translated link) site for the CIMA which had VG30det .Has info for Early and Late models, series 1(red covers),

mine is series 2(silver covers) . ECU PINOUTS for ecu with 4 separate plugs(early) AND  ecu pinout for ecu with one large Blue plug(late) same as z32 etc

plus info on other sensors etc .well worth a look for VG30DET info  :D

 

https://translate.go...1cima/index.htm


Edited by Stano71, 29 October 2016 - 06:10 PM.


#9 JelmerPatrol

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Posted 19 November 2016 - 11:55 AM

This is from a Japanese book with al the JDM cars from 1995-1996

 

31113855975_ab0ae76ca6_b.jpg


83 Datsun Laurel L24--->VG30DET in progress

84 Nissan Patrol L28E--->L28ET in progress

 

http://www.patrol4x4...holland-314225/





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