I just had a little advice from one of my freindy LT1 members here on LS1 tech on not to use the Holley 58mm Throttle body. Why? i dont know. I have already have the trottle body but mayby if it is no the one needed for my setup, only then will I return it from where I bought it. What is the best throttle body for the LT1 and what do you fellow LT1 fanatics run on your ride.
Thank you,
Jeremy Brown, AKA ZEX-Z
396 LE3, Le4cam LT1 in progress

 

Arizona Speed and Marine 58mm. Havent got to drive it yet though so I cant really tell you if it makes a difference!:-(

 

Running a 58MM BBK

 

i would go with the 58mm

 

58mm bbk

 

Are there any horsepower losses between different 58 mm throttle bodys?

 

Probably negligible.

 

Bbk 58mm

 

has anyone used the summit racing brand 52mm or 58mm throttle bodies?

 

Im running a 58mm BBK, but the idle quality is crap. - when bbk made the TB's they drilled the IAC passage wrong and so the IAC always changes the idle speed no matter what you set it in the computer..- usually a 3-400rpm variance.

AS&M's is much better and so is TPIS's but TPIS only makes a 52mm but people say you dont notice between it and the 58.

 

Holley's have problems is why. They stick. I ran a BBK on my TPI and had zero problems. I'll be using the same one on my LT1 once I get it bored to 58mm.

 

I have a ported 93 LT1 intake...

 

Can't comment but those are priced great.

 

i had 52mm bbk 4 years and a 58mm holley 4 years no ploblems with either.i still run the holley.

 

I really wish I had money :\ Like, all I have is $40 lol

 

I have a 52mm bored stock TB. It has never been an issue, I did not have to bore my manifold, and it fits up perfectly because it is the car it came off of.

 

Most say 52 is all you need anyway to like 500 hp.

 

No but I plan on getting one. I would have to say that bigger here is better.

 

NO idle issues in my 1995(Vette) with a 58mm BBK, however, a buddy returned his BBK and went back to stock becuase of idle issues( 93 vette).

 

I agree but some Head Cam packages have 58mm tb and LT headers listed as supporting mods.