Ford GT-Who has opted for tuning-dyno results?

[steveirl]

I am thinking of pulling the trigger on some tuning upgrades for my GT. Specifically a supercharger pulley change and ECU flash (the Ford Racing program option), Accufab sport exhaust, and Accufab thtwinblade throttle body. Revolve state this will give approx 650bhp, but reading on the Ford Racing website and the Ford GT Forum, many owners seem to say that this will result in up to 630 RWHP, which would put the BHP nearer 700!
Also apparently, Ford's official 550bhp figure for the GT is conservative, and most cars make more than this straight from the factory.
Any GT owners here shed some light on the above, or have experience of the tuning upgrades available?
Cheers
Steve

[kds keltec]

I have been lucky enough to work on and passenger ride in a ford GT from london to wilton house , its also had the pulley / exhaust etc and is around 650 bhp as said by the owner after it had been on a rolling road .

I do remember him saying that the figures could be as higher after these mods as some made more power than others and all seemed higher than claimed from factory i think

I will contact him

Kelly

[ThatPhilBrettGuy]

steveirl said:

...but reading on the Ford Racing website and the Ford GT Forum, many owners seem to say that this will result in up to 630 RWHP, which would put the BHP nearer 700!

That'll be American horses which seem to have shorter legs than UK ones.

[dealmaker]

You want:

Heffner CAT back exhaust (not the Accufab X pipe) - better flow and nicer sound - also looks better

Accufab SIngle Blade Throttle Body (or the twin blade if you don't want to go for extra power in future)

Mafia Sensor

Predator Programmer

Whipple 4.0L SuperCharger

Inlet pipe stiffeners

Hello 800+ HP ! (+ significantly more if you want to run more than 19/20PSI and add a Boost-a-pump to get more fuel in to maintain A/F ratio)

Ford Racing headers will release another 20-30 BHP but are very, very, VERY loud!!

Some guys are gunning for 1000RWHP with this set up in the USA - there will be a new cold air inlet kit in the market soon to remove the current greatest "bottleneck" in the inlet system (the restrictive air box)

[steveirl]

dealmaker said:

You want:

Heffner CAT back exhaust (not the Accufab X pipe) - better flow and nicer sound - also looks better

Accufab SIngle Blade Throttle Body (or the twin blade if you don't want to go for extra power in future)

Mafia Sensor

Predator Programmer

Whipple 4.0L SuperCharger

Inlet pipe stiffeners

Hello 800+ HP ! (+ significantly more if you want to run more than 19/20PSI and add a Boost-a-pump to get more fuel in to maintain A/F ratio)

Ford Racing headers will release another 20-30 BHP but are very, very, VERY loud!!

Some guys are gunning for 1000RWHP with this set up in the USA - there will be a new cold air inlet kit in the market soon to remove the current greatest "bottleneck" in the inlet system (the restrictive air box)

Cheers for that
On the Heffner vs Accufab, do you think it is worth over double the price?
The throttle body, I believe the twin blade will be the best bet, that the single blade is really only suitable if you decide to go with much higher power levels. Even stock, these cars are very very fast.
Mafia sensor? can you explain, and predator programmer too please.
Whipple 4.0 I am familiar with, and that would be taking me to 800hp levels, kinda scary to be honest given the huge torque output too.
The Ford racing headers are no longer available from Ford Racing, they are now out of production, I have a Pantera, which is loud, really loud, and the GT is too quiet for what it is, how much louder will the Heffner cat back be?
I have heard of the cold air kit on the way too, that will be interesting.

[dealmaker]

steveirl said:

dealmaker said:

You want:

Heffner CAT back exhaust (not the Accufab X pipe) - better flow and nicer sound - also looks better

Accufab SIngle Blade Throttle Body (or the twin blade if you don't want to go for extra power in future)

Mafia Sensor

Predator Programmer

Whipple 4.0L SuperCharger

Inlet pipe stiffeners

Hello 800+ HP ! (+ significantly more if you want to run more than 19/20PSI and add a Boost-a-pump to get more fuel in to maintain A/F ratio)

Ford Racing headers will release another 20-30 BHP but are very, very, VERY loud!!

Some guys are gunning for 1000RWHP with this set up in the USA - there will be a new cold air inlet kit in the market soon to remove the current greatest "bottleneck" in the inlet system (the restrictive air box)

Cheers for that
On the Heffner vs Accufab, do you think it is worth over double the price?
The throttle body, I believe the twin blade will be the best bet, that the single blade is really only suitable if you decide to go with much higher power levels. Even stock, these cars are very very fast.
Mafia sensor? can you explain, and predator programmer too please.
Whipple 4.0 I am familiar with, and that would be taking me to 800hp levels, kinda scary to be honest given the huge torque output too.
The Ford racing headers are no longer available from Ford Racing, they are now out of production, I have a Pantera, which is loud, really loud, and the GT is too quiet for what it is, how much louder will the Heffner cat back be?
I have heard of the cold air kit on the way too, that will be interesting.

Heffner is definitely worth double the price - the Accufab looks like something I could make in my garage with some old scaffold pipe and a welder - the Heffner is engineered to a different level - I am told it sounds a lot nicer but have no personal experience of this (as I have never had the Heffner fitted to an otherwise stock car - only to a modified version).

Twin blade is probably best if you have no aspirations to go for big power in future. off-idle and throttle transitions should be smoother.

Mafia sensor = after-market Mass Air Meter voltage controller - so you can make adjustments to the A/F ratio etc.

Predator = Flash Programmer - so you can flash different map's to the engines ECU

You can pick up used racing headers generally - I have them on mine - it is loud - think NASCAR open pipe loud - with flames to match

Yes...it is scary with the Whipple 4.0 ....very scary.....wet roads become err.....interesting........actually it's a bit lively on dry ones come to that!

Heffner cat back on it's own will release some of the pent up V8 roar I think without being obtrusive - whereas the Accufab X pipe just makes it's loud but not melodious IMHO

Cold air kit will be totally pointless for you if you aren't going for the Whipple - more than enough airflow through current system to cope with increased PSI on stock s/charger

http://www.diablosport.com/index.php?module=htmlpa...

http://www.diablosport.com/index.php?module=htmlpa...

Edited by dealmaker on Wednesday 22 September 13:21

[steveirl]

Thanks again for your input, greatly appreciate it.
I do not have any aspirations to go with the Whipple 4.0 its just a bit over the top for me, and the way i use the car. For what it is worth, I think Ford done a great job on this car with regard to power/torque delivery at low revs, it is easy to get away quickly in the first two gears without getting sideways yet still giving it some stick, you need to be respectful of the torque yes, but not to the extent that you end up feathering the pedal or backing off. I dont want to stray too far from that.
On the heffner cat back, are there any UK based sellers of that? or would I have to buy from the US direct?
As far as the tune/mafia options go, I just want to wake her up a little more, and leave it at that, and have no desire to alter ECU maps, as I do not really understand the principles behind mapping! Well used to tinkering with the Holley and timing on my Pantera when needed, but that is as far as my practical knowledge stretches.

[dealmaker]

steveirl said:

Thanks again for your input, greatly appreciate it.
I do not have any aspirations to go with the Whipple 4.0 its just a bit over the top for me, and the way i use the car. For what it is worth, I think Ford done a great job on this car with regard to power/torque delivery at low revs, it is easy to get away quickly in the first two gears without getting sideways yet still giving it some stick, you need to be respectful of the torque yes, but not to the extent that you end up feathering the pedal or backing off. I dont want to stray too far from that.
On the heffner cat back, are there any UK based sellers of that? or would I have to buy from the US direct?
As far as the tune/mafia options go, I just want to wake her up a little more, and leave it at that, and have no desire to alter ECU maps, as I do not really understand the principles behind mapping! Well used to tinkering with the Holley and timing on my Pantera when needed, but that is as far as my practical knowledge stretches.

Revolve usually have stock of the Heffner. You will need a "map" when you change pulley anyway - otherwise your A/F ratio will be to pot.

[steveirl]

Yep, the plan is a map, pulley, twin blade throttle body, and exhaust. Been talking to Dave Jones in Revolve and the plan is to bring the car to him in October, in the meantime I will decide on the exhaust. IF you hear of a set of FR headers in the meantime, maybe you would pop me a message.
Steve

[ThatPhilBrettGuy]

steveirl said:

IF you hear of a set of FR headers in the meantime, maybe you would pop me a message.
Steve

Just to confirm though, they are loud, very very loud. I'm bored of it now sort of loud to my taste.

I've got the Accufab and like it but it is a harsh sound I'd agree. Mine seems very well made so maybe they come out differently now. I've had mine for 3 years or so.

Oh and talk to Dave about KW3

[steveirl]

KW3???

[dealmaker]

steveirl said:

KW3???

New suspenders - a must have.

Mine's running about two inches lower! - and stiffer - makes a HUGE difference

[Buford T Justice]

Dave Jones is a good guy I found him to be very helpful. My car had the pulley upgrade and Accufab and that did me very well. For me there was no point going any further not to mention when you want to sell it will be harder as the car has been "messed with".

[Jason GT 650]

My mods consist of the pulley change, bumper delete and a Tubi-style exhaust (not quite as loud as the Accufab but better looking and a much better sound IMHO). All fitted by Roush.

I'll probably go for the suspenders on next service......

oh and Dave Jones @ Roush/Mountune (cant bring myself to call them Revolve!) is a very helpful chap for advice on all of this stuff......

Edited by Jason GT 650 on Friday 24th September 17:38

[Shadow62]

I have a heffner exhaust fitted to a stock GT. Fitted by Revolve, looks and sounds great.

[steveirl]

Thanks for the input guys, it is much appreciated

[steveirl]

I have decided to go for a full sports system including long tube manioflds, in stainless steel from Stainless Works Inc. in the US. Dave at Revolve will fit it for me, going to send the GT over next week for a service, general health check, pulley upgrade and ECU tune, and Accufab throttle-body. It will push the power and torque up by at least 20%.
Really looking forward to it now that I have decided what to do. All easily reversed too if needs be in the future.