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Fastman Throttle Body

18K views 64 replies 16 participants last post by  Scottina06 
#1 ·
I received the fastman throttle body today, cannot say enough good things about it. The work is top notch and there was an absolute difference in performance. fyi: i already had the Henessey CAI installed.

here is the difference that i noticed. for science sake i was not trying to get the best 0-60, but rather a consisted one. so my stock run i just put the truck in sport mode and simply slammed the gas. i did not do manual shifting as this might alter the 0-60 time and be less consisted. so this morning in 46 degree weather i did 0-60 in 4.6 with no wheel spin and maybe a slight chirp of the tires 3 times. engine temp was 190 degrees.

i installed the fastman throttle body, drove the truck 3 times through out the day for short errands to get the truck accustomed to the TB. I then went to the same road, same, direction. and did 3 more 0-60 runs. engine temp was nearly identical 190 degrees which seems to be operating temp. i again put the truck in sport mode and attemped my first 0-60, epic fail, i ran a 4.8 and tires were spinning as well as traction control light came on. the truck then missed the shift and fuel cut off kicked on.

i then ran the truck a second time same road, etc and same experience. for the third try i kept the truck in sport and just shifted manualy. the truck ran 4.3 which is by far the fastest i have had out of the truck. there was still excessive wheel spin and traction control kicked in again. but there is no question the TB added significant power and second i am confident i could get 4.0-4.1 0-60 with the 2012 jeep.
hope this helps others in making a decision. i have posted 2 photos demonstrating the difference in the bore of the stock vs fastman TB.
 

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#6 ·
I have the hennessey as well and my best 0-60 is 4.0 on a 20 degree morning, in track, TC off.....rev to 2000 rpm and drop the hammer
 
#9 ·
Thanks man! You running a tune of any kind? Only thing that has stopped me is is the TB just leaning your stock tune up or are you actually gaining hp. Dont want to spend the money when I can lean it up in my tune. Its gotta do something though, all I see is the 85mm on his site did you have to ask for the 87mm?
 
#16 ·
I bought a spare grill off of car-part.com and had it painted by scotts paint and perfromance here on the forums. BUT...you can get a new alpine grille from JG vendor justforjeeps.com Call them and ask for Peter.
 
#17 ·
If you are already running a custom tune; would this help provide anymore gains? I have the Hennessey CAI and ARH Headers/CAT Back Exhaust complete system. The Jeep was custom tuned on a dyno locally to ensure the air to fuel ratio was accurate. It's hard to find a good 0-60 test road here on Long Island, but my runs are usually between 4.3 and 4.4. Just in Sport mode smashing the gas; haven't tried shifting manually yet... If getting this will mess up my custom tune, not sure I would want to try it yet, unless I can understand what it is exactly improving over the stock.
 
#19 ·
The ARH headers are freaking awesome. I had the entire setup installed which included the headers, high/flow cats, xpipe, resonators and ARH mufflers. You get to keep the stock tips on as well. The sound is great, hardly intrusive in my opinion. Very deep low growl and screams at wot. Custom tune along with this setup produced over 40 hp delta compared to baseline runs.

My question still remains, should I bother with a different TB?
 
#24 ·
Looks like I will be calling Fastman today! In response to some of your other questions. I went with the 1 7/8 to 2 inch primary. I think that's the standard for the 2012 SRT8.

As far as video, I don't personally have a video captured yet, but there's a guy locally who had the same exact setup done as mine. I actually met him on Long Island prior to getting mine installed to hear it in person. The video sound is a good representation of what you should expect. Hope the link works; he also has a full write up on it on the other site...

2012 Jeep SRT8 American Racing Headers, Hennessey CIA, DiabloSport Trinity Tune - YouTube
 
#25 ·
Well I contacted Dan at Fastman and ordered one. Glad I talked to him, I didn't realize that the 2012 tb was different from the 2013. Went with the 847 oversized option, I think the 2013 is the 521; for some reason they went with different electronics housings.

One last thing I need to do is get a 180 Tstat - anyone have a recommendation on which one to get and where???

One last question I forgot to answer above is whether I got any codes after the headers install. Several people have not but I did, I threw a couple of codes on the bank 2 passengar side. P0153 and P2098 codes, I even had the O2s replaced. The custom tune fixed it though; I think he just basically turned the rear O2s off, which you can now do as of a couple of weeks ago...
 
#26 ·
Jet part# 10183

yes...the 13' is a different TB. I noticed this when adding my billet tech TB cover. 13's also have some other differences.....like 70/30 rear bias in track mode etc.
 
#31 ·
I did my install in two phases as I was a little hesitant in getting it all done at once. I ordered the headers/cats and had a local shop do the install. Cost of headers on the ARH site is $1,625 plus labor for install. I got my local shop to purchase them along with install for $2,000. I think that was an awesome deal given it took us close to 10 hours to do the install. ARH could probably do it in 8 hours, but it's a pain in the rear... My local shop said they would never do it for that price again!

I then went back directly to ARH to do the rest of the Catback setup, they did it for $1,750. Cost on their website is $1,695 - you always get a better deal if you work with them directly. So total for me out of pocket was $3,750 plus the cost for the custom tune...
 
#29 ·
which size headers you go with? 1 3/4".....1 7/8" or 2"?

Im thinking of the 1 3/4" and sticking wiht my Borla.....gotta wait on tuning for the 13's though
 
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