you get deep into the double digit fuel mileage ???




I havnt seen more than 12mpg since I got my car..
Aparently my gas pedal seems to have a problem staying off the floor...

 

I'm confused, some are saying the factory CMCV is for fuel economy and emisions. But you are running the delete plates and saw a 1-2 MPG increase?

 

I think what he's trying to say is that it's for low speed fuel economy where having a lot of air coming in, needs more fuel to go with it. At speed he's seeing 1-2 mpg more because although they are open all the way or a majority of the way, they are still causing a restriction. If you remove them, at freeway speeds he's getting 1-2mpg more...

1-2 isn't that much when you really think about it.

 

Hah, note the mpg I mentioned was on hiway..... when I'm not holding it steady cruising down the interstate, I'm ripping *** around town so my mpg ends up being around 16.


Yep, that's an accurate way of what I was trying to get across. Thanks BOOST .

 

1-2 mpg isn't a whole lot for 1 car, but when you factor in 300,000+ vehicles, 1-2 mpg goes a long way towards CAFE.

And BTW, it is CMCV: Charge Motion Control Valve.

If I recall, the older 4V 4.6L V8s had IMRC (Intake Manifold Runner Control) which did the same job and was supposed to boost low-end performance significantly and is more noticeable on heavier cars/trucks. The 3400 lb S-197 GT isn't going to need low end torque to push the car around at city speeds, but a 4200 lb Crown Vic or a 5500-6000 lb truck/van will need low end power.

 

Anybody know why the Steeda models are triple the price of the Ford? I know Steeda stuff is pricy, but that is quite a difference.

 

Scott, I live by lidios shop and frequent there often. He has the steeda plates on his car, and retuned it for them. He said he has support for cmcv's, but hasn't done a tune for frpp cmcv. Don't know if there is any difference, but I ordered the frpp cmcv's today and should have them next week for him to install and tune. I would call him either way. Hope this helps.

 

If you bought a Mustang thinking about the environment.. you picked the wrong car.

I think you would have been more suited to a hybrid electric......

 

Actually Ford is concerned about CAFE because of the hefty fines if they don't meet it. If they can squeeze 0.1% improvement in gas mileage, they will do it. Recall the switch to 5W-20 in 2001? Yep. #1 reason why they did it is because in the US, we have the fine folks at the EPA. Everyone else in the world uses 5W-30 or 5W-50 (Ford GT and GT500) in the Ford Modular V8 engines.

And for what it is worth, a 2005-up Mustang GT is considered a luxury gas-sipping car compared to my 2000 Crown Vic. The Crown Vic has spartan features and gets 11-13 mpg city and 18-20 mpg highway (factory 3.55s, did it w/ 16 miles on the odo, still gets the same crappy mileage to this day). The GT has: a tach, Shaker 500, cabin air filter, driving lights, power adjustable driver seat, real cupholders, tire pressure monitoring system, and gets 18/25!!!

 

I wouldn't be surprised if they are the same thing. I'll wait for the FAST intake manifold and let people "beta" test it first.

 

Thanks for your input...Please let us know how your install and tune goes next week. Do you know if he is going to do a before and after dyno pull to see what they are worth?
Scott

 

Lidio told me that from doing other customer cars, he typically sees a 6-8 rwhp gain throughout, not only peak. That is NA of course, and you would get more with a super or turbo charger. I will post results of install and tune at least, if not dyno, when I get it done.

 

First off because they are billet where the FRPP are stamped (right term?) Also, the Steeda's have bigger ports than the FRPPs however, without ported heads, the exact amount of air flows through both. If you're going with ported heads, the Steeda's are the way to go.

 

I already have Doug's race tune. Did it work as is with the plates deleted or did Doug have to modify it?

 

He will need to modify the tune. Do not, repeat, do not run the delete plates without a tune adjusted for those plates. You'll be doing 20mph all the way home on fail safe.

 

You can also port the FRPP plates to match your ported heads. FRPP are cast, not stamped. No way I am paying 2x for a plate with holes! Doug at Bamachips has great tunes for cars with the FRPP CMCV delete plates- my car runs Cadillac!

 

Thanks for the correction...I forgot the term.

 

Well I just put mine in today. I got 3.73s in on Thursday and it seems like the deletes made a bigger difference. Of course, I've been taking it easy since I got the gears since I am trying to break them in first. The car feels great now, I love it. It's definitely the best bang for the buck mod for our cars. I only paid $95 shipped for them.

 

Seems like ordering the CMVC Plates with a CAI and a Tuner is a great way to get 30-40 hp.

 

comment on the CMCV or whatever- way back when, during the months of waiting for my car, I did a lot of reading- dunno where I read it, but, had read the purpose of those butterflies was to divert 'low flow' volumes at small throttle opening to concentrate/accelerate airflow and direct it towards the fuel injector tip to add some swirl/atomization/whatever, mostly to aid in emissions...this and the annoying delay at lifting the throttle(to help prevent high vacuum conditions from increasing oil consumption slightly- even with 5w20) I guess were a couple of the tweaks that while not hindering performance too bad, still helped aid in keeping emissions down...supposedly these are some of the cleanest engines around, yet still run pretty freakin good

I imagine the plates do obstruct a bit of airflow, but kinda gotta guess a lot of the gains are from a good tune- would be neat to see some before/after from the exact same car(same tweaked basic tune- except for the deletes) to see the gains.
I dunno, but would have to guess the engine *might* run just a tad rougher(and a LOT 'dirtier' emissions wise) until warm without the plates, but all the above is just my 'bench racing' opinion

Question: My car has a big change in sound at somewhere around 2500 rpm- always assumed due to these plates opening up, allowing the intake to growl more, but wondered if it also could be due to the cam advance/retard shift...anyone with the deletes notice if their car sounds louder under 2500 rpm, and if the sound still shifts tone around there???