156 GTA Tuning

Just wondering today what mods work well on a GTA? Bar going bigger cc or forced induction.

What kind f gains can you realistically see on a gta?

cheers
-pablo

If you were willing to go to 3.8L then serious power is possible (ie 400bhp), but that is a bit much for FWD!

LOL looking for more power pabs ??? Thinking much the same myself...If mine works out i am sure we could do you a good deal

aye well does no harm to think about these things

Originally Posted by pablo

aye well does no harm to think about these things

Your not wrong mate

the full stainless steel exhausts paired with a CDA cold air intake and a ecu remap are popular mods. depending on your budget really.

£4k would get you a supercharger conversion and 320bhp for example... or 300 for ecu remap could free up to 10, full exhaust another 5-6bhp and intake system 5-6bhp, total around 270bhp which lets face it is mean. that setup your looking about £1k maximum

My GTA now runs 311.5bhp on the rolling road and thats with a gsr induction kit full supersprint exhaust and a bespoke remap and it works very well

and probably doesnt cost much less than a supercharger kit..... only with less power

About £3500-£3750 but can still add a supercharger to take it further

Plus the nesessary suspension upgrade to coilovers- around £1500 fitted?, brake upgrade (unless you already have 330mm discs/calipers) - another £1500 fitted?. LSD? another £1500 fitted? Better radiator and cooling?, better oil cooling?

Suddenly your £3k upgrade needs another £4.5k to £5.5k spend in order to make what you have done to the engine useable!! It's probably better tospend on the handling and stopping first, and then look at making the engine more powerful!

Cheers

Per

Originally Posted by Darth Vader

About £3500-£3750 but can still add a supercharger to take it further

Id add an SC first. Nothing beats forced induction

Originally Posted by Darth Vader

About £3500-£3750 but can still add a supercharger to take it further

311bhp would be nice but thats a bit rich for me mate.

as for brakes etc 330mm brembo 4pots surely are enough?

True Per the best mod i have had done is def the kw coilovers already got 330mm brakes but moving up to 355mm and an atb quaiffe diff is being paid for today

One thing to bear in mind is that any induction kit & re-map becomes redundant if you go the supercharged route ( or at least that's what it looks like to me ). The supercharger replaces the air intake and the engine needs bigger injectors and another re-map.

I was very sceptical of the supercharger until I happened to see a red supercharged car on the ramp at Autodelta. The car was partially dismantled and you could see all of the various components that get installed. Quite impressive.

I've had the induction kit and the re-map for about a year now, and am looking for the next step. I was thinking of a full supersprint exhaust, but that's about £3,000 so I really don't know what to do.

BTW, I'm in full agreement - coilovers first.

what kind of power does the ind kit and remap get you? 15bhp?

I'm not entirely sure what the power increase is as I haven't done the rolling road thing but it's much nicer to drive now.

It doesn't seem to have changed the top speed though, I managed 155 ( indicated ) before the re-map and couldn't get over 155 after ( both done outside the UK )

Originally Posted by ukoldschool

and probably doesnt cost much less than a supercharger kit..... only with less power

Would you really fit a super charger without upgrading the exhaust? I would have agrred in the days when Alfa built exhausts to the exhaust ports. Now they fit bodged pipes that scream out for upgrading.

are there anyy cost effective alternatives to the supersprint exhaust?

which bits are most important? headers, cats etc?

The whole is important, as leaving 1 bottleneck in the line isn't going to be nearly as effective as a complete upgrade.

Removing (some of) the cats seems to be the #1 thing to do though

Originally Posted by ukoldschool

Id add an SC first. Nothing beats forced induction

Yeah mate, but nothing compares to natural aspirated

Originally Posted by Cuore_Sportivo_155

The whole is important, as leaving 1 bottleneck in the line isn't going to be nearly as effective as a complete upgrade.

Removing (some of) the cats seems to be the #1 thing to do though

does anyone sell a proper decat rather than the hugely expensive cat replacements?

be nice to free a few ponies, get a bit more sound and still look stock

Originally Posted by pablo

does anyone sell a proper decat rather than the hugely expensive cat replacements?

be nice to free a few ponies, get a bit more sound and still look stock

A properly designed cat housing with the right cat in it will not loose anything noticeable compared to a decat pipe.

Also you will have to deal with the problem of more frequent road side checks, where VOSA will stick an gas tester to your pipe. It is almost sure that you will fail emission requirements and will get a hefty fine plus the inconvenience of sorting it and MOTing the car. This works out more expensive than buying the cat.

problem is the cat is the guts of a grand!

Originally Posted by CPH

Would you really fit a super charger without upgrading the exhaust? I would have agrred in the days when Alfa built exhausts to the exhaust ports. Now they fit bodged pipes that scream out for upgrading.

Not really what I was trying to say - Of cours ethe exhaust would need sorting after an SC conversion, just saying really that the supersprint system as nice as it is is designd around a standard engine. It wouls need opeing up to get the best out of a supercharged engine so why buy one in the first place unless you specifically want to stick with NA power? Id rather spend the £4k on the SC conversion, then get a system built to spec - and even that would probably cost less than the supersprint!

True, SuperSprint is kinda expensive, but imho you can get a very decent 320HP from the engine and still keep it NA, I higly doubt you'll need more power than that.
For me, tuning the GTA engine would mean :
-full SuperSprint exhaust
-CDA or similar(I've seen some japanese stuff that looks great and not so expensive)
-new cams
-polished intake manifolds(whatever that gives you I have no idea)
-obviously new chip program
Eventually, if you do need more power but would like to keep it NA, you can go for larger injectors, and so on, or even the larger engine capacity, 3.7 or so.