95_TA_USMC

iTrader: (4)

i was lookin through an older car craft mag today, and came across this place called professional-products out of california... and was wondering if anyone has used or heard of these products workin out well? im lookin at the 58mm throtte body for my lt1... thanks in advance for the help and advice!

96lt1m6

iTrader: (31)

had a few friends with them a few minor issues with PP series but most others have issues ...... what mods do you have to need a 58mm?

Elliott's94Z

iTrader: (12)

Ran one with no issues. A few of some well known guys on here are running them with great luck as well. My vote is try one out...you should have good luck

robsquikz28

iTrader: (246)

they are awesome I would get one again

MasterTomos

iTrader: (15)

a 58mm is way too big for a stock or mildy modified motor...you wont see any power gains...some people even claim a loss in horsepower from a 58mm TB...

With full bolt ons and a tune u'd MAYBE want to upgrade to a 52mm...

58mm is waaay too big.

RamAir95TA

iTrader: (2)

I partly disagree. There's a difference between a 'claim' in HP and actual proven dyno info. Are you speaking from experience or internet hear-say? I'll go with the latter because you don't have one listed in your mod list.

Depending on your mods, a bigger throttle body may not be worth the extra coin. If you have the money to spend, just go with the 58mm. On a fuel injected application it's almost impossible to go too big, if you're tuned for it. Lots of guys just throw one one without tuning and hope for the best. Fact is, a 58mm won't hurt you. While it may not be the best HP per dollar modification, it will still add a few HP on a stock/mild application (and more on heavier modified engines).

~BuMps AloT~

iTrader: (5)

I have a professionals product 58mm tb on my bolt on car, but i am planning on doing a set of LE2 heads and cam. Let me know if you end up wanting one i found a pretty good place to buy them new for a dang good price.

Fuels94

Running a 52 on my set-up (1.5 years) with zero problems.

StealthFormula

iTrader: (35)

I've been running a Professional Products 58MM TB for over a year now and it has worked flawlessly. About 2 years ago I sold a brand new P.P. 52MM TB to a member here who hasn't had any issues with it either. Can't say the same about my previous $400 Holley Shame because it was a beautiful piece of billet which I'd rather have than a chinese product.

itSSlowZ28

iTrader: (5)

not trying tp change the subject, but how about the summit 52 and 58mm throttle bodies? anyone have experience with one yet?

chevyjeff59401

iTrader: (1)

Haven't bought one yet but all my research says it's best bang for buck. So if i can find out where that good deal is I'd be very greatful. If you dont mind bumpsalot. Thanks Jeff

Badazz 97 TA

iTrader: (18)

the summit brand TB's are made by professional product. fyi.

i have a 58mm PP on mine. Just a couple small little bugs had to be worked out. It liked to stick closed after cooling down. it took a minute for it warm up and open and close normal. It seems to be better after a 2-3k miles. Also, the return spring isnt as strong so it makes the pedal feel real light. other then the normal tuning i really hadnt had a problem with it.

i didnt really gain anything at the track. it might of made my 1/8th mile stronger but its hard to say. There was a nice throttle response difference that i like.

Camaro350z2897

iTrader: (2)

there was just a thread on this comparing it to the holley 58mm. and 52 is worthless. if you get anything get 58, and you need nothing bigger than stock on a otherwise stock or all bolt on car really. not much of a difference.

heads/cam, stroke, just step to 58

myltwon

iTrader: (1)

I like my PP 58mm zero problems, can't say the same for alot of the other brands out there

RamAir95TA

iTrader: (2)

I must have the only Holley 58mm throttle body with no issues.

grn95t/a

iTrader: (10)

i ran that 52mm for about a year with no issues, sold it to a buddy who has it on his now for awhile with no issues. i now have the pp 58mm on my new setup with no issues after 300 miles. so i say hell yes to them! i paid like 230 shipped for a new polished 58mm one off ebay.