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View Full Version : Throttle Body for 5.7

tman4024
05-31-2009, 08:58 AM
Anyone have one on their Jeep? Are they worth it? I see a lot of the SRT8's have aftermarket ones.
hemi.jon
05-31-2009, 09:01 AM
theres not to much of a gain alone with them, at least not really independently confirmed. most people do them when they plan on bigger mods, so they can get the extra airflow.
DirtyBlackJeepSRT
05-31-2009, 11:37 AM
The people I've sold them to, have said nothing but great things. I got 1 left I was going to put on eBay next week, but I'll hook you up instead. PM me. :)
Scottina06
05-31-2009, 01:47 PM
who does your work Chris? I bought an F&B and it didnt fir my 06 4.7 V8.
DirtyBlackJeepSRT
05-31-2009, 05:09 PM
The Fastman, of course. If you're looking for one to work on a 4.7L I'll inquire.
ducks unlimited
05-31-2009, 05:22 PM
are these worth the money
DirtyBlackJeepSRT
05-31-2009, 05:27 PM
I sold 4 of these and have heard great things. I can't wait to test it out on the track to get some times.
hemi.jon
05-31-2009, 05:38 PM
are these worth the money


from what ive seen with the vettes and some other vehicles, is you wont notice a real HP gain, but there will be a slight increase in throttle response..as far as worth it? i would say if your doing some real modding i would do it.
robpp
05-31-2009, 05:42 PM
i already talked to Fastman, he can do a core exchange for the 4.7 for sure. I would bet the 5.7 as well.

its about 150 for the work plus shipping. and a core deposit of course.

i got one done in preparation for the 08 intake manifold.
Scottina06
05-31-2009, 11:35 PM
The Fastman, of course. If you're looking for one to work on a 4.7L I'll inquire.


yes...2006 4.7 WK
TeamCherokee06
06-01-2009, 09:52 AM
I had the fastman's throttle body on my 4.7L 'Kota,and I can say nothing but good things!I most definitly recomend them....

http://www.thefastman.com/
tman4024
06-01-2009, 10:03 AM
^^ How much of a difference in power/gas mileage did you notice?
TeamCherokee06
06-01-2009, 10:12 AM
I couldn't really gauge the correct gas mileage because my foot was always pressing the pedal to the floor lol.My butt dyno definitly felt a soild power change because with a CAI and exhaust I had the TB just added to the fun.
Harrison@Stage6
06-01-2009, 08:29 PM
From what my buddy says on his 6.1...... it's the poo. Huge throttle response difference. Not sure what it will be like on the 5.7's but, it's been a good thing for the SRT's. It WILL BE my next mod. Hopefully I should have one next week if all goes to plan.:D
Dylans3960ccs
06-01-2009, 08:38 PM
Can any one hook me up with a 70mm throttle body for my 4 liter?

I'm having a really hard time finding anything over 63mm which isn't much of an improvement over the stock 60mm.
TeamCherokee06
06-01-2009, 08:53 PM
Dylan,You don't have a supercharger or any force induction so why would you want something so big,I think the Fastman's 62MM is more than enough.His TB are true bore with maxinum air flow,you get the best for a great guy that knows his stuff!

http://www.thefastman.com/Throttlebodies40.asp
Dylans3960ccs
06-01-2009, 09:44 PM
Dylan,You don't have a supercharger or any force induction so why would you want something so big,I think the Fastman's 62MM is more than enough.His TB are true bore with maxinum air flow,you get the best for a great guy that knows his stuff!

http://www.thefastman.com/Throttlebodies40.asp

b/c I hear you get a lot more power with a bigger throttle body even on a stock motor and oh idk I might turbo mine.
TheBackRoads
06-01-2009, 09:53 PM
are the srt/ hemi ones still going for about a grand?
TeamCherokee06
06-01-2009, 09:59 PM
b/c I hear you get a lot more power with a bigger throttle body even on a stock motor and oh idk I might turbo mine.

I think that a 70MM bore is going to be overkill and it's gonna suck in to much air and your going to lose lower end torque.I'd go with the 62MM and most free flowing cold air intake you can buy or make and get the thing as far from the motor and that will give and good combo.
Dylans3960ccs
06-01-2009, 10:09 PM
Ok fine I guess your right over kill FTL

well are there at least some decient cams for the 4 liter?
TeamCherokee06
06-01-2009, 10:12 PM
If you saw my XJ thread,I might be owning a 4.0L and I will learn and be able to help you more.Your learning Dylan and becoming a better Jeeper,just listen(or read lol) and learn!
Dylans3960ccs
06-01-2009, 10:14 PM
ok thanks I guess I'll just do some more searching ( which I have not done in a long time).:thumbsup:
Harrison@Stage6
06-08-2009, 06:53 PM
are the srt/ hemi ones still going for about a grand?

That's for the Arrington 90mm. Personally, I think it's overkill for a mildly modd'd SRT. If you're running like a Stage 3 or 4 heads/cam package with a P/P Intake manifold THEN I can see it making sense. They're a PITA to tune.