Accufab 70mm plenum/throttle body.
 

I saw this on a web site. They were claiming "the NEW Accufab 70mm plenum + 70mm throttle body, for the ultimate intake combination! Combined power of 10HP / 15TQ on bolt on GT!"

Its around 450 for both before shipping and is only 10 rwhp.

Can anyone vouch for these numbers? and is 10 hp good for $450 bucks? Anyone know of a better brand/better results/lower price?

I'm still looking around, but I am going to get the steeda shifter, some "show" items, and am still looking into a few other things. I also saw on the same site that the mustang gt had 252 hp baseline. I know the 260 claimed is crank hp. has anyone dyno'd a stock gt? what was your hp?

also the steeda underdrive pulleys. Do they really give you 8-10 hp as claimed?

I know it this is getting long... so i will stop here for now

Stock GT's tend to dyno in the neighborhood of 230 rwhp with a 5-speed.
If you do a search on corral.net, there is alot of discussion and dyno results there on the various upper intake plenums made for 2V's (Accufab, C&L, Trick Flow, Dragon, etc.). They seem to be a good bang for the buck mod.
As for underdrive pullies, they are definitely high up there on the bang for the buck list and from what I have seen they do give you the gains they claim.

I second Blue GT.

One nice thing about the TB's and the plenums is that they can support additional mods down the road. I mean to say, they can help them work better. Also, they improve torque nicely through the power bands too.

Re: Accufab 70mm plenum/throttle body.
 

Anyone tried the Ford Racing 70mm T/B?

I don't believe that TB's differ too much. Some companies make a polished on...but that's just an appearance thing.

Yea Tb's differ. You get what you pay for, I have heard more negitvie things about the mac TB then positive. You can score one for 120 on ebay brand new, looks good, sounds good but I heard more people complain then say it was quality.

I heard the same thing, something about it not fitting right?

Definitely get the pullies, A good bang for the buck.Make sure that you get the ones that replace the damper, not the piggy back style.

Thanks guys for the TB response...I never realized there was much of a difference.

i like the Accufab T/B
 

here's mine
not the 70mm 2V model, but i can vouch for the quality

http://robwegner.mystarband.net/images/engine.jpg

I have only seen pully's that "piggy back". Who makes ones that do not?

Steeda does.

Is there a difference in application between the 70mm and 75mm T/B and plenum? There seems to be no price difference. Why would you choose the 70 over the 75? Is more not always better in this case?

Anyone???? I would like to know as well.

Changing to bigger intake and exhaust parts will only gain you power if they are a restriction. If you go too big, you will lose a ton of torque down low and maybe gain an inconsequential amount of hp on the top end. Without changing the plenum or adding forced induction I wouldn't go over stock or 70mm TB at most, and you won't see any gains with the 70mm without other mods.

aren't 02 and 03 stangs stock 80mm ? i have been told that my a few people. if i chose to go with a C&L 85 mm MAF, 75 mm TB and plenum, would thisinconsequently leed to downed torque down low?
by the way, the steeda underdrive pulleys are everything they're cracked up to be

Yes, the MAF on '02 and '03 stangs is 80mm - I was talking about the TB.
There is nothing wrong with going with the 75mm if you are getting the plenum and MAF also. People have seen 20+ rwhp on the dyno with these mods along with an aftermarket intake elbow.

The latest issue of MM&FF had dyno results on the 70 mm and 75 mm TB and the C&L Plenun. The 75 mm TB had the best gains when used with the plenum. 12+ HP and 14+ Torque. The author stated that the "car pulls like a train in 4th geer" with these mods. I believe the 70 mm TB with the plenum put up 9 HP, but I don't have the article in front of me.

Good gains, but not quite as advertised.

thanks for clearing that up i was a little confused. those gains seem good enough for me. thanks for the info

Yes! Thanks much.

I have some direct interesting input on this subject. I added the C&L Intake and 70 mm AccuFabTB with a custom tune. The car lost power for a fact, however the dyno didn't show this. I might have opened things up too much as I also did a 90 mm MAS and fuel system upgrades to match the extra air (42 pounders and Cobra Fuel pump). Officially my dyno #'s went up 16 rwhp, to 340 rwhp, however I LOST a solid 1-2 mph at the track. Prior to upgrades I ran 109 mph to 111 mph, 12.7 to 12.8 ET's in the middle of Florida summer and my track runs a few weeks ago in 60 degree temps were very consistent upper 12.9's at 108's with the new TB and Intake Plenum. The track doesn't lie. Anywho, I've got SC setup, and maybe my car is off for what ever reasons, but man am I freaking PO'ed, as I spend about $1500 FOR A SLOWER CAR!!!!!!!! Man did it hurt to type this response.