VH Commy mods

[HighLife]

My mate has VH commodore 6cyclinder and wants to do a bit of performance enhancing.

Originally he wanted the Red triple carbed 6 that will be left over from my engine conversion but as far as I know dont think it will get passed due to the pollution requirements.

What budget bolt-on options does he have to squeeze some more oomph out a 202 of this era?

He's not a car tech head and is not going to go for major stuff like EFI engine conversions and big budget stuff - just wants to make his VH a little more exciting.

I dont know a lot about this era of engine and whats allowed with the pollution crap on the motor :confused:

[GTSBoy]

Basically, if you want it to be any more legal than the red 6 idea, then you can't do much at all. The carby is not allowed to be modified as it is part of the emissions gear. All the emissions gear must remain, so if you fit extractors, then they must have the EGR fittings.

You can open the motor up for a rebuild and put in the usual stuff, like higher comp pistons and a cam and some head work. Couple this with the sensible options like decent performance clearances in the bottom end, alloy timing gears and a better harmonic balancer, and the reliability should be OK. You should get the dizzy regraphed on a dyno too.

All this, if you stick with the standard carby will cost a few grand and will net you maybe 30 extra HP. It'll sound nice and go a bit harder, but won't really be worth the money.

If you want legal bolt ons....there really only is an exhaust. If you want to bolt on a supercharger then it would need to be low boost draw through using the standard carby, and this would not be worth the money or hassle of fitting either.

By far the best option, although more expensive and in the realms of transplant work that you ruled out in your post, would be an RB20DET or similar dropped in.

cheers

[karl_2ltGC]

VH Performance enhancement

As follows:

1. Sell VH
2. Buy a descent performer


Basically unless your gonna drop another motor in (holden v6/v8 or a nissan) its better off left stock.

My only advice would be go out and get new plugs, leads, dizzy cap and rotor, plugs, change oil and filters, tune ect...

Get it going as well as it can standard...youl most likely find there are some stuffed parts on it that are holding the car back.

[FastEHHolden]

Guys, quit being so negative..VH is his chosen weapon.


You can still get decent go out of the blue 202...and it doesn't have to cost thousands. If its budget your after...slip a new cam and lifters into it and put on extractors and a 2-2.25 inch exhaust system...leave the carby alone as they can support a decent increase in performance.

If you have a bit more dosh you can change the head to Yella Terra/Do up your head....add VK injection hardware and programmable computer....bump the compression with a piston change.

[FASTVP]

Street Machine ran a series of articles a couple of years ago, where they got the 202 to pump out about 160fwkw.
So it can be done...

If you are interested, I can try to dig up the mags and see what they did.

[maddnez]

ok performance mods fro the 202 :)

got a nice 202 in my vh as well.

go to a wreckers or similar and get a 2.8 blue head.

that will nett u higher comp.

get an open element air filter OR cut open the std box,
take the manual fan off and put a thermo on.
thet is around 20-30 KW in these mods alone! dyno proven.(sm article mentioned b4 got 20 KW from just the fan and filter)

get a decent set of extractors (VK EFI will be cheap at $50-100)
go a 2 1/4 or 2 1/2 zorst, go with 1 good back muffler and no resinator. will sound good there ;)

on the trimatic the shifts are controlled by vaccum
find the vaccum line and but a t piece into it and get a adjustable valve (put a filter on it of course) and let it vent a little vaccum, will make the auto hold gear for longer and shift harder. poor man's shift kit. :)

the std carb will support to around 125-130FWKW. these mods should see u near this limit.

also advance the timing 2-3 degrees from std as the extra comp will love this.

apart from going 3.08 or 3.36(if u can find them) thats about the limit for cheap mods

and b4 anyone says it wont work, i had this done on my old car and it embarased quite a few 'FASTER' cars.

Danny

[FASTVP]

Originally posted by maddnez
apart from going 3.08 or 3.36(if u can find them) thats about the limit for cheap mods



I have the 3.08 LSD from my VP for sale if you are interested.
I'm not exactly sure if it will fit the VH though, anyone done this before?

[Pushrod]

Fast VP, your centre will fit vn up 6's and 8's, also vl turbos..

its a 28 spline borg warner item..

I think most early commodores come out with a 3.08 ratio anyways.

[FASTVP]

If you want to see what a 202 is capable of, check out the latest Zoom magazine.
There's a turboed, fuel injected VK 202 with 421fwkw. It runs a low 11.

[pearlvk]

i have a set off triple su's u can have for 150

[goose]

Originally posted by maddnez
get a decent set of extractors (VK EFI will be cheap at $50-100)
go a 2 1/4 or 2 1/2 zorst, go with 1 good back muffler and no resinator. will sound good there ;)


VK EFI extractors won't fit with a carby manifold, though. The EFI pipes come straight out from the head and so don't clear the manifold.

[karl_2ltGC]

Originally posted by FASTVP
If you want to see what a 202 is capable of, check out the latest Zoom magazine.
There's a turboed, fuel injected VK 202 with 421fwkw. It runs a low 11.

Any motor is capable of crazy power gains ect...but whats after here is a good bang for buck mod...

maddnez what exactly did you do to your car?

Why didnt you change carb???

[FastEHHolden]

my guess is he didn't change it because there was no need...

RE: that turbo 202 in Zoom..I am going to place a call to the place that built his exhaust manifold....I was only hoping for around 320 hp (238 kw)....but I could live with it if I got more.
http://www.hometown.aol.com.au/fastehholden/myhomepage/auto.html

[maddnez]

the car actually had half these mods when i bought it.

i have scince gone to a efi VK manifold and a GRA carby.

my current setup is totally different.:P

YT roadracer head, acl sugs etc.

the holley 350 netts a power loss over the varijet, and even tho the 500 gets a little more power, would take extensive work to get the fuel economy anywhere near good.

i'd say use thae varijet until its useless then decide wether u want su's ,a webber ( or 2 or 3 ) or a holley.

its really a BIG thing to decide on cause if u only want mild then the varijet will go good and to improve things beyond its capabilitys isnt really mild anymore.

Danny

[AzzurrA]

its all well and fine saying 'use the varajet' however, i think you'll find the holley will give you more power (if set up right) and better fuel economy (if set up right)

I have a VaraJet II (VK Carby) on my STANDARD Vk, and i only get 6.5km/L (15.4L / 100km) and it only has 72hp.... it has been rebuilt, looked at, tuned, etc, and nothing fixes this shocking economy...

I'm putting a 320 holley on it in a couple of weeks, so i'll let u know if it makes more power, and what the fuel economy is like

[goose]

There's something else wrong too, then Toranafan. I got much better than that in the city with a Varajet (off a VK).

The holley 350 I had on it was about 3 mpg worse of in the city and about the same on the highway.

[FASTVP]

Originally posted by karl_2ltGC
VH Performance enhancement

As follows:

1. Sell VH
2. Buy a descent performer


Basically unless your gonna drop another motor in (holden v6/v8 or a nissan) its better off left stock.




Originally posted by karl_2ltGC
Any motor is capable of crazy power gains ect...but whats after here is a good bang for buck mod...



Errrr, yeah...