VN S1 VS's S2

[VryNeat]

just wondering what the difference between the s1 and s2 vns are if this has been posted previously feel free to send me in the right direction

[VryNeat]

im talking about the buick nots the 304s cheers guys

[LordMayhem]

radiator setup and where the thermostat is on the intake manifold apart from that not alot i think (thermostat on an S1 is at the rear under the throttle body S2 it is at the front.....S1 has a pressurised overflow tank and no radiator cap on radiator S2 has a radiator cap)

[STEALTHY™]

No difference. No such thing as a series 1 or series 2 VN.

Theres early and late (aswell as a 3rd different 'update' (lol series 3))

[VryNeat]

No difference. No such thing as a series 1 or series 2 VN.

Theres early and late (aswell as a 3rd different 'update' (lol series 3))

fair enough but i heard the early models were a bit more torquie under early revs causing the old people to do burnouts and shit so they retuned them true or false?

[INNAWE]

I may well be way of track but from what I can recall the 88 vn had a different motor.
And yes I can say they were pretty well know for breaking traction. I had one for my second car.

[VryNeat]

I may well be way of track but from what I can recall the 88 vn had a different motor.
And yes I can say they were pretty well know for breaking traction. I had one for my second car.

it was still a buick i just think it was either tuned differently or the compression was different cant remember tbh

[immortality]

the early VN's have a different cam and tune. for the later VN's they changed the cam to a slightly longer duration but with less lift. the net result was the same power but a slightly different torque curve that starts higher in the RPM range. on the early VN's the rockers use a different size bolt, the cam uses a different flange, the timing cover is slightly different (coolant passages/water pump) the obvious differences of the intake manifold/cooling system and PVC. there are also some slight wiring changes including the DFI and coil pack, the CAS and the harmonic ballancer (later VN's onwards they become a press fit)

infact Holden changed things right through the production run of the VN. check the VN/VP history thread. it details all the production changes with dates etc

[VryNeat]

out of curiosity if planning on doing forced induction on one what would be better and dont say a v8 im just curious

[immortality]

2tenths of **** all differnce when you add FI

[VryNeat]

lol fair enough in that case ill just find an 8 ^^ dont know why i was expecting much of a difference really

[VNracer34G]

Different block - S1 dog turd (rope) rear main seal
S2 one peice seal - you can hook it out without dropping the
sump and taking off the rear main cap. EV6 cast on side of block

Different cranks- S1 six bolt rear flange, different man/auto.
S2 eight bolt rear flange, same man/auto.
(covered here V6 Crankshaft Info )

Different Heads - extra passage on S2 intake face, double springs on S1 singles on S2

Oil pressure relief spring - stiffer on S2

Hideous factory 'headers' on S1, cast manifolds S2



and as mentioned in previous posts , no doubt theres more too

[STEALTHY™]

Different block - S1 dog turd (rope) rear main seal
S2 one peice seal - you can hook it out without dropping the
sump and taking off the rear main cap. EV6 cast on side of block

Different cranks- S1 six bolt rear flange, different man/auto.
S2 eight bolt rear flange, same man/auto.
(covered here V6 Crankshaft Info )

Different Heads - extra passage on S2 intake face, double springs on S1 singles on S2

Oil pressure relief spring - stiffer on S2

Hideous factory 'headers' on S1, cast manifolds S2



and as mentioned in previous posts , no doubt theres more too

like i said, technically theres no difference, cause neither exist

[rob drag racer]

my s1 vn has alot more torque than my old vp race car YouTube - vnminispool

[VN Wagz]

VN S1 engine- torque monster with different shape intake manifold (plenum and runner shapes are different, but visually hard to tell from above), different cam, no restrictor into manifold from TB (which S2 had). Generally ran outta puff about 4500, whereas the S2 motors were good to make power to approv 4800-5000ish.

Small piece of trivia (cant remember where from tho? LOL) >

The original 88 vintage VN V6 made more power and torque than the VL 3L turbo engine everywhere until its 4400rpm peak, after which the silky smooth RB kept pulling. to make the additional 25kW (125kW vs 150kW respectively).

And if i remember, the VN manual was credited with some very fast 1/4 times in both auto and manual form in its initial testing- mid 15s? Which was the same as the VL turbo.

Oh, and the tune in the ECU for the S1 was a bit more aggressive in its low-end fuel and ignition mapping> im running the ECU from my brother's 88 Vn in my S2 VN wagon, when it was jsut n/a it did give her a bit more "snap" down low (i got from a 16.2 to a 16.03 at WSID just from installing the S1 ecu).

[savage1987]

Plenty of changes along the way, plenty of places to read about them too. Do a search, although luckily some people have covered it quite well here. If planning FI, it won't matter which engine you get, so just take a later one for ease of changing plugs on the driver's bank (very annoying on the early models)