Mongoose hits it right on the head. We are seeing 10+ hp gains just with a tune. And 25+ with tune plus good CAI. They test a "bone stock" car, then throw on the TB and they see these 15 hp gains... The 5.0 article claims that no tune was used at least.

What I want to see is a car running a good intake (JLT, MMR, etc) WITH a good tune (Doug's or Brent's) used as the baseline. It will probably require some tweaking on the baseline tune IF the TB is actually increasing air flow, but the final run needs to be with TB, CAI and custom tune back to the same A/F as the baseline.

Then and only then can we even begin to say "the TB is worth x HP and y lb-ft".

 

Somewhere I read the stock throttle body can supply over 100% the air flow needed for a stock 4.6. Even one with a CAI & tune would not require much more in terms of CFM. So what is it about these things that is supposed to add HP/TQ over the entire RPM range? It can't be more air flow if the engine is seeing enough already with a stock TB.

If the motor is just getting more air at a shallower blade opening angle then that's akin to just opening the throttle faster. Still not a performance benefit since not many of us race at part throttle (1/4 mile that is).

 

What about a supercharger?

 

I kinda understand that. It's useless to try to outflow the heads. If we knew the cfm that the heads were capable of, then we would know the limits we could go to on the throttle body. I had a 99 GT and upgraded to a 70mm Ford Racing TB. A few years later, a guy with an 03 Mustang told me his stock TB was now 70mm, which was the size of the opening of the intake.

 

Without ported heads this cant be any good.Just another adds 10HP joke.If everything I have done provided its advertised HP gain I would allready have a 10 second time slip.

 

bbk has backed out the date and will not be releasing their new Throttle body. I was told by an employee at Brothers Performance in Corona that they are going back to the drawing board because that cant make more than 4 - 5 hp on the dyno with it. So 300 bucks is not worth 5 hp. They are going to re design it again. good luck on getting something better than the stock one. That is not the most restrictive part of the chain.

 

Perhaps they'll discover its a lost cause to develop a throttle body upgrade.

-Dan

 

Maybe they should just go back to the prototype from last year that the magazine "tested" at what, 15rwhp or something silly like that???

 

No doubt. I also want someone to release those magic 45hp long tube headers that a lot of the magazines covered a year or so ago...

 

The truth is,Ford did there homework when they designed the new 4.6.And made good power for what guidelines they had to follow.So we are not going to see crazy gains from small gimmicks.They need to make there money and they also are in bed with the Magazines.So dont always believe what you read.Pretty strong marketing tool to have a Mag praise your part.I am sure the praises go to the highest bidder.You can bank on that.

 

Well I ordered one from LMPerformance.com . It should be here this week. Even if it doesnt help performance much it will give me a excuse to work on my stang.

Question, will my TB Spacer work with the larger throttle body?

 

so now these things are not being released? WTF. well the LFP one did suck, so maybe they are having the same probs?

 

IMO, they all suck...

 

waste of money,just buy a tb spacer.

 

Cancelled my throttle body order, I think I'll put my money into a Doug tune.

 

no it will not work!

 

and I think the money that i was saving on my next part will either be the GMS Coil On Connectors or Headers,.........hmmmmm

 

I did pick up about 10hp at the tire when I got the lfp TB. But it made the car idle a little weird and the gears would bind sometimes, causing failsafe

 

We found no power gains testing several different size combinations on several different cars. This is the reason we decided to not carry larger throttle bodies for the 05/06 ourselves.

Gus

 

Would be neat to have Steeda test the GMS throttle body in a totally independent test to see what results they would get. I know JR will stick by their claim of substantial horsepower gains from their unit but I would like to see someone of Steeda's reputation test these other brands. I believe Gus has just told us what these larger throttle bodies are worth on the 05/06 Stang.
Scott