1badchicken

iTrader: (47)

I have a stock 52 mm intake would it hurt if I know I want to go 58 in the future and I just buy the 58 now and wind up porting to a 58 later. Would putting a 58 take away from the torque. What is the difference or am I just better off just buying a 52 for now.

wrd1972

iTrader: (12)

A 52mm and especially a 58 will do NADA unless you have ported heads and a bigger than stock cam.

What are your specs?

streetwarrior96

Isn't stock 48 mm????

plaf713

iTrader: (8)

tis true

buffman

iTrader: (9)

Yes but he said he has a 52mm intake, which in that case he's correct, the bores on the intake for the TB are 52mm

Formula350

iTrader: (3)

I cant comment on how a 58mm TB does COMPARED to a 52mm, but on my TPI motor I noticed a nice gain when I went to 58mm (with ported upper plenum to match).

Personally, I would get a 58mm NOW if you plan to do ANYTHING more in the future. You won't lose anything by using a 58mm over a 52mm. If you plan to spray, boost, or go big bore N/A, you'll be set in that department at least.

You'll want to bore out the intake from it's 52mm to 58mm, which is what has prevented me from installing my 58mm :\ (Yea, it's listed I know).

Here's the site someone here has followed, and I plan to, for porting it on the car. (Let the bashing begin!)
http://www.bfranker.badz28.com/96ss/58porting.htm

Read it ALL before you do it. The end lists some better ideas that the top doesn't, like using gear lube as well.

buffman

iTrader: (9)

just remember any larger Tbs installed on a a4 car requiring Tuning..!!

koolaid_kid

iTrader: (21)

The stock manifold is 52mm. The stock TB is 48mm. Unless you want to bore the manifold (not that big a deal, I have heard) 52 is all you need.

94 F-body

iTrader: (1)

I would suggest any type of headders that are not stock, so shortys, mid's, long's. the engine has to breath, keep that in mind

97Lt1TA

iTrader: (54)

why waste money on mids or shortys when pacesetter ceramic coated long tube headers go for around 400 dollars. its the best bang for the buck dont waste your money on shortys and mids, you get the most power out of lt's

Formula350

iTrader: (3)

Correction: 94 and NEWER A4 cars I can't tune my tranny via PCM, since I don't HAVE a PCM

koolaid_kid

iTrader: (21)

I cannot agree with this. I installed a Hooker catback system on my car. Little change in performance. I installed a K&N filtercharger. Little change. I installed a bored stock TB. HUGE change. No tuning ever used. Personal experience. IMO, you must open the system up intake and exhaust. Tuning is only required if you install something that radically changes things, such as H/C, FI, etc.
If you want to go 58, get the intake bored, and install the larger TB. All else will follow, IMHO.

burnzilla

iTrader: (3)

https://ls1tech.com/forums/showthrea...=724583&page=3

....

buffman

iTrader: (9)

Formula350, yea might want to mention that. 94+ Forgot we have the 4l60 crowd in here.

koolaid_Kid it's your trans burn the damn thing up if you want. If proper tuning hasn't been done for your TB choice (a smaller 52mm, a transgo kit byitself, usually will do) you can burn the trans up. You're moving more air at less throttle angle. So since TPS is one of those sensors that help dictate line pressure, you're going to have less line pressure. Not good.

Formula350

iTrader: (3)

Yep, blasted 700R4s I was all happy to get my 93, I was about to go out and buy the B&M skift box, just temp, and then later on tune my trans up a bit. No dice :\ Makes me REALLY wish I had my built trans from my 91 now

Oh well, moving on. Line Pressure = GOOD. Trans, factory, ease (slip) into gear. So when you put more power to them, that's why they tend to last a lot less longer. A shift kit gives it more pressure, so it jumps (slams) into gear. As we all know, slipping = bad And thus, line pressure = good

Puck

iTrader: (17)

That thread is fairly useless IMO. There should be no debate that longtubes are better. The links to quick cars with mids or shorties mean nothing - I can post vids of stock suspension z28s running 9's and 10s, but does that mean we should all ebay our LCAs and Torque arms because we do not need them?

Every bit helps - if you are not lowered, go for the longtubes. If you cannot hack up the extra 100 bucks or so, wait a bit and save your pennies or find a new hobby - cars are expensive!!!

Back on topic - IMO for the TB go 58mm and bore the intake if you are planning on going H/C or FI in the future. If not, then throw on a 52mm. Either way, get a good quality tune, and you will be happy with the results.

infinitebird

iTrader: (11)

It's not how big of a change it is. It's the fact that the auto is calibrated to shift based on TPS % vs RPM and MPH. When you install a larger TB a given TPS % will not be the same as stock and you will be at a different RPM and MPH, so the trans will not know when to shift properly. I have heard of some people getting away with upping to the 52mm without tuning but I wouldn't consider that a good idea, and you're definitely going to need it with the 58mm.

buffman

iTrader: (9)

^^ I said the same thing mere posts above a transgo kit will do just fine for the pressure increase needed for a 52mm, but with a 58mm you'll need to bump the line presssu.re