making hp with an N/A 6cyl?

[208_Fireball]

Okay, simple mod number 1:

First of all, a vk efi head flows more than a vh blue 202 head (have proof on my site, provided by YT), and costs the same as a blue head from most wreckers, so that should be your first step. If you know someone with a die grinder, give the head a bit of a cleanup also.

Cheers,

Dave

[Feenix]

Yes the VK EFI head has more flow. Because of the efficiencies of EFI holden were able to open up the port volume near the short side radius, without a idle/off idle performance drop.

However, some of the holden castings suffered from pretty bad core shift. If you're just going to go the quick touchup and reco of a head then slap it on go with the EFI head, if you're going for the big full on port job get a VC-VH blue head with as little corrosion as possible.

'nix

[208_Fireball]

Am shortly about to find out how a cleaned up vk efi head plus 60thou oversized pistons, shaved top of block, dynotec st2 cam (217 degrees@50thou, 0.4275" lift - reasonably mild) and exhaust go on a 202 i have at home. Will inform of the results.

Current stage - calculating CR, so i can get it to around 9.6:1.

Cheers,

Dave

[NOS388]

making hp

How effective is an Yella Terra head for an EFI engine?
Where can I get an stroker kit for an 202ci?
Does anyone know of an engine builder who has done engine work for an HQ racer?

[Feenix]

Ok a few things.

HQ racers are very stock in terms of equipment, so their tuning experience would be of limited help unless you want to run a single barrel strommy and hal around a 2 tonne car at speed.

I wouldn't recommend stroking the 202. Its already stroked enough. You will find that 186s because they rev a lot more freely can actually make more power.... obviously at a small bottom end torque sacrifice. The ultimate compromise is a 192 which is a 186 + 60. I would use a HP block for this.

208_Fireball's engine sounds like a good combo. I reckon it'd go well. Except in the HP blocks (and I believe 173 red) +60 is a touch risky in really worked motors.

'nix

[NOS388]

running 12's

I would like to be able to run 12's with an 202, backed by an trimatic in "80"vc commodore!
Would i be able to get an 202 to make enougn power to run these number????????????????????????????????????????

[Com_VC]

I doubt you be able to run 12's in N/A but with turbo it shouldn't be a problem. There are toranas out there which are running 9's!

[Feenix]

Turbo, supercharged, or Nitrous. the ole VC's a tad heavy for 12s.

'nix

[Pushrod]

finally you have told us what your car is, as for running 12s with a 202 in it, "tell him he's dreaming"

You could run 12s but it would cost a lot more to do it with a 202 than with another engine.. look at the (latest?) zoom mag with the yellow celica on the cover, there is a vk doing 11's in there powered by a turbo efi 202 but there is none of the original parts left on the engine !! they comment in the article about how expensive it is/was.

Your 80's como will also need some major drivetrain work to lay down a 12 as your diff is a piece of crap, plain and simple.


You should at least drop a 308 into it rather than spend a shitload in the 202 just to have it be beaten by a stock VL commodore or something similar.

[NOS388]

Ok I will admint that 12's was an over estimation, but I was told by my brothers friend that his brother inlaw had run an N/A 6cyl in to the twelves(You know what it's like with second hand information).So what would be actual 1/4 pass then????????/

[AzzurrA]

sure, you could get a n/a 202, worked off its tits, into the twelves..... in a 600kg car

[NOS388]

????????????????????

:p :D Would I be able to an 6cyl commodore to run 13/14 sec pass's(on street rubber and slicks).

[Feenix]

I was talking to a mate of mine that used to race a lot with 6 cyl holdens.

He got low 12s with a worked 186 in his LJ torana XU-1. It was street driveable, too.

He also used to have a 6cyl altered that ran much quicker.

I asked about getting 12s in a VC, he said it could be possible if you had short gearing, and stripped as much weight out of it as possible. 14s or even maybe high 13s were possible if you didn't want to go to such drastic measures.

So, there is hope for you out there haha

'nix

[NOS388]

stripping ?????how much??????????

Hey feenix, how much stripping would be required e.g removing stero system, back steat, door trims, console, changing seats(to lighter raceing seats).
Could you tell me if your friend did this time on street rubber or slicks?
What did he have done to the engine to do 12's?
I would ask about the altered but it seems that it would be a total monster!

[Feenix]

The XU-1 had a 12 port head (extensively ported) triple carbs (weber I think) and upgraded ignition etc.

The altered... ran on methanol. Big compression, forged pistons (honda motorbike pistons with a few slight mods), ridiculously worked heads. It used to leave the line at over 5000rpm and redlined at 8500. He ran a clutchflite transmission thats about all I know.

'nix