Getting The Fg To Run 0-100

[Arkayne]

Hi guys!

So I haven't updated much about my car the past few months, and thought I'd let you guys know what's been going on, but also to get some opinions on what can be done / should be done.

I have a semi-experienced tuner working on my car. He's done LOTS of tuning for Fords, Holdens, and ofcourse the rice burners, but it's the first time he touched an FG falcon.

Last year, we removed the air box and fitted a better CAI kit - a bit of growler buy keeping the original FG air intake pipe (other then replacing it with an FG F6 one). I had the rear muffler removed, and a twin pipe for the back. We also did a tune using VCM Suite.

Through this, I got approximately ~297rwkw according to his dyno (his dyno also read that I was getting 245rwkw from factory, so it MAY be off quite a bit).

So, it's back in there today, and we're working on a few things. Firstly, I wanted a few mufflers put on the rear pipes, since it's a bit loud. I know this will cut performance a bit, but the exhaust is WAY too loud. Secondly, we're finally getting rid of the restricted CAT and replacing it with a high-flow one. And thirdly, we're installing 60lb injectors.

I'll go into detail about a few things:

The CAT. Unfortunately, because of his lack of experience with FGs, when I requested for a 4" high-flow CAT, he insisted we didn't because of the restricted room under the car. I know djkice has put a 4" CAT on his, so I'm assuming the tuner is wrong about this - we're going for a 3"-3.5" (depending what will fit) high flow, which will still be better then the factory (as he states).

The Injectors. Someone told me there was a difference between injectors for a standard car, and one that is forced-induction. Something about positive injectors vs. negative ones. I asked the turner, and he said that the person was talking sh*t. I didn't hesitate to believe him because the other person doesn't even own a turbo car, let alone be a mechanic. What do people think about this?

And finally, VCM Suite re-tune. We're reworking the tune to get more low-end power. Originally it was running 10psi and hit around the 11psi on higher revs, but I noticed NO difference in the 0-100km/h timing, and thus, this post.

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So getting back to what this post is really about, I want a faster 0-100km/h timing. I LOVE the high end speed, but to be honest, I never get there since the car has never been to a 1/4 mile. I'd love high end power, but mostly, I want the low end speed to be dramatically different.

What should I do or expect for a faster 0-100 timing? And not just a few .seconds out (like 4.8 to 100), but like a 4.5 or 4.0 0-100km/h speed? Has anyone got this with their FG's? And is it possible by keeping your original turbo?

Thanks for any feedback / help.. I'm very grateful to get some knowledge on this, as unfortunately, my tuner isn't 100% sure...

(and yes, before you say it, it will be taken to someone else once I KNOW what's going on. Without that knowledge, I don't know if what my tuner is saying is right or wrong, and I don't want to have to drive my car all the way to Adelaide to get a tune that is no better then the one I have now).

Thanks!

[Benji_vs]

Hey, im not sure what that guy was going on about positive and negative injectors but yeah injectors for a turbo'ed car are usually higher flowing than a NA car as you would expect.

To be honest mate I wouldn't be leaving your FG with an inexperienced tuner as these cars can and will destroy themselves if not tuned properly as is common with the generic flash tunes. But if your comfortable and you are careful then all the luck to ya.

The stock cat is a restriction so any hi-flow cat will be better, as for size im not sure of any benefits of a 4" over a 3.5". A larger dump pipe will probably be needed as well.

0 to 100 times can be a bit sketchy in my opinion and is usually a number used to sell cars. I would think 5 seconds is very possible but remember that tyre spin can be a problem when your make a lot more power and will affect for time. Remember that 4 or so second 0-100 times are super car territory which is possible because a huge number of factors.

Good luck with it.

Edited 25/05/10 05:45 AM by Benji_vs

[Arkayne]

Thanks for the reply Benji!

Yeah, I'm quite uncertain about his experience with FGs, but he's definitely tuned and dealt with many BA and BFs before..

I can definitely do a 0-100km/h in 5 seconds from the stock tune, and managed the same time with my current tune. But with all this work done, can I expect a easier, more fluent 0-100 time? Or will it still be the same (yes, I do lose traction off the line and there's a bit of wheel spin, but when it sits right, it does 0-100km/h in 5.0secs)?

He didn't mention a dump pipe at all - what should I talk to him about with this? Is it a definite requirement when changing the CAT?

Thanks again!

Edited 25/05/10 10:45 AM by RHR
No need to quote above post. USE FAST REPLY

[Gee]

If your looking 4 a quick 0-100 spend some money on wider rear rims and a good set of rear street tyres. Then if you have some money left over speak to a suspension expert to see if they can give you more rear grip.

[Benny]

Personally I think the more power you make the less likely you are to reduce your 0-100 times. With 0-100 being such a short period of time and being able to get traction is a real hit and miss, especially on the street. My money would be on soft wide rubber on the rear with the current power you have and practice practice.

Benny

[Worm]

Agreed... 300rwkw should see a 4 second 0-100 time with awesome tyres...

There isn't that much noticable difference in a 14 second and 13 second 1/4 mile car... But when you get down into the 10s, it's launching... Much more force...

You would need to stall it up a bit to get up to 100 quickly but this would make you look like a cock at traffic lights!!!

I would say if you are gonna get injectors and a cat, you definitely need a tuner who knows what they are doing... But if he has tuned heaps of ba's and bf's, this shouldn't be an issue...

[Gloo]

As far as I know stock fg zorst with upgraded cat are good for mid 300's, they out perform the smaller turbo so you wont need a dump unless you upgrade the turbo. 290kw off standard injectors is exelent. FG phoons injectors are good for mid 300's so that's an option if you dont plan on upgrade the turbo.

[ronburgundy]

Official claim and/or Wheels magazine tested is 5.1 from factory I believe.

Of course given everyone here thinks Wheels has red lion, rather than blue oval, running through its veins, maybe that 5.1 is on the high side

[Arkayne]

Thanks for the feedback guys!

What sort of tyres should I be looking at? 275's? I'm looking to upgrade to a set of Dark Argent 20" in the next few months, will this particular rim size offer 275's? Or am I better off sticking to my stock 18" with 275's?

What particular brand am I looking for?

@Worm - What sort of rev range am I looking at when you say "stall it up"? I launch it at usually 2,000 revs, but even that spins the tyres and usually loses traction with my current power (297rwkw).

I currently have the factory 18" rims with factory tyres (Dunlop Supersport).

Edited 25/05/10 11:06 PM by Arkayne

[RAP1D]

Don't be too concerned with kws if you looking at faster 0-100 times... torque and how it is delivered through the rev range will make a huge difference to how the car jumps off the line.

FG's with the small turbo & ZF dont really need to be stalled up much on the street, usually stalling up ends in wheelspin on stock tyres.

With the correct offset, you can fit 295s in the rear without any mods, but choose a decent tyre.

Its no easy feat making a 1900kg 2wd car jump off the line fast, power/responce/torque isnt the hard part, its getting it to the ground that's the hard part... and smart throttle use