Hopefully verry soon i will have a ported/polished intake manifold and plunem, SLP large tube runners, #24 fuel injectors, Edelbrock headers, and now i need to know what size TB would be good. Right now i have about 275-285hp at the crank. Should i get a 52mm or a 58mm? Check sig for mods.

 

Do you have an air foil? You'd probably see more of a gain putting that in than a larger throttle body.

 

So i should stick with the stock 48mm TB and just get an air foil?

 

Air foils dont do a heck of alot. and the TB prolly is good for a few more HP. .But if u want one get the 52. the 58 is over kill IMO

 

The 58mm is overkill even with the mods i listed obove? How much of a small gain would i get from an airfoil?

 

Air foil will get u maybe two hp. for the 40-60 dollars they charge i dont think its worth it. ive seen some home made ones out there that do the same thing and are free. as for the TB i think that with the 58 u need it for 500 plus hp. in ur case the 52 should be more then enuff. correct me if im wrong here boyz!

 

is an airfoil even woth the price? I found one on Thunderracing.com for $46.

 

i say no but beauty is in the eye of the beholder. its ur call man. seems like a waste to me. 46 buxs for a fairly minimal gain. Ur choice man

 

its a pain in the ***, but if u really needed to u could have ur throttle body bored over to 50mm, get some 52mm blades out of a v6 throttle body, cut them down to 50mm and ur all set. 58mm is way to big even 52mm is kinda pushin it. 58mm is like a 116mm throttle body! 52 is like a 104mm and the 50mm is like a 100mm. there is another thread in here that has a CFM equation check it out, this will tell u what ur motor needs for air, unless its over 700 which i doubt, u wont need a 52mm throttle body.

 

I have been doing a little research on them and i am going to get one but im not sure wich one. Im thinking of this one off of yahoo. Air Foil Do you think this one is better than the one off of Thunderracing.com?


Also what does anyone think of TGR Cold Air Intake Kits ?

Thanks for all the replys.

 

I think they're both a rip off.

 

that TGR CAI looks like a real hack of a product. i would have expected a lot better peice from them, what were they thinking?hell i could make somethin like that myself.

dude u could make that CAI for like 20 bucks i bet

 

Dont waste ur money on an air foil and if u do there all the same. everyone does the same thing so get the cheapest one. and the CAI is a pretty shoddy job. go out make urself one. im doing my own this summer. they look easy to do and u'll save urself a wack of money and get just as good results. just take ur time on it

 

OK...since no one else has mentioned this yet:

S E A R C H....

There are many threads on this...

Look for one titled "BBK 52 or 58mm"...we hashed this out a lot on that thread...

I would make my own CAI (and intend to) as opposed to paying $150 for that one...

 

Check e-bay for an air foil if you want one, they are usually going very cheap
http://cgi.ebay.com/ebaymotors/ws/eB...category=33558

 

hell ill pay 5.50 for one!

 

I think unless your pushing ALOT more horsepower you really dont need anything above the 48mm, The LT1 305 err 315 HP WS6 used the same size as ours, for that matter so did the LT4 and they were making 335HP. I think you'll be alright.

 

i agree

 

Throttle bodies and air foils are both a waste of money. If you really feel the need to waste money, buy the air foil because at least then you'll be wasting less of it. The 48mm throttle body is sufficient until you get well over 300rwhp.

 

Ditto.

 

Ok thanks for the replys.

 

I'll have 350rwhp on the motor and and about 500rwhp on the gas. Should I go with a 52 or not?

My buddy has a 58mm on his 355 with Dart Iron heads and stock Manifolds. His car is quick but do you think he is taking a performance hit with such a large TB?

 

If uve maxed ur mods...the 52 might be ok for u. the factory one can handle quite a bit tho

 

Just for reference, the Ramjet 502 utilizes a 48mm TB. I am pretty sure it cranks at least 500 flywheel HP.

 

But wouldn't an airfoil help just a little bit by smoothing out the air going inside the TB? I have decided to stick with the stock 48mm TB but it makes sense that the airfoil would still help a little bit? Thanks again for all the replys, im learinin a lot.

 

Damn i'm in the wrong line of work.$150 for that ****???

 

Oh ***, not that again.

Will a 48mm TB support a 500hp 502? Yes.
Would the 502 benifit from a 52-58mm TB? Yes.

 

Thank you for reiterating my point.

 

:nono: :nono: :nono:

Still in denile. I tell ya what, the next time I go to the dyno I'll bring my 48mm and my 58mm TB. The only change that I will make between runs will be the TB. I will post the results. I have yet to see a dyno comparison between the two. If you have, please post your findings to support your conclusion.

I think a lot of people rely to much on engine theory instead of real life numbers.

 

Good luck doing that one. The plenum really should be setup for the 58mm TB in advance, which will affect the results with the 48mm TB slightly. If you just throw a 58mm on a stock plenum, you are wasting your time.

 

Free Bird has a ZZ4 with a comp 306 and a HSR. He can use a 58mm TB if he wants to.

 

I see.

Carry on.