upgrade throttle body - 4th F-Body

2fast4u · July 20th, 2010, 08:41 PM

can anyone give a step by step on this,,, is it all common sense?... do i need anything special??... and does it need tuned as soon as it goes on??? i just bought a 52mm bbk used from a swap meet for $100... the stock 48mm is on this motor.... and can anyone tell me if it was worth spending the money...?

JamesZ28 · July 20th, 2010, 09:11 PM

Stock tb are good to around 500hp! That is a good price for a bbk throttle body, but unfortunatly you will see little to no gains in hp, just slightly better throttle response... You will not need a tune, it will be fine

BenSS · July 20th, 2010, 10:08 PM

Quote:

Originally Posted by JamesZ28

Stock tb are good to around 500hp! That is a good price for a bbk throttle body, but unfortunatly you will see little to no gains in hp, just slightly better throttle response... You will not need a tune, it will be fine

I'm going to agree with James here. I put on a new 52mm about 2 months ago and didn't really see or feel a whole lot of difference. If you do internals youd prob notice though.

RrCoX22 · July 21st, 2010, 02:55 AM

that's a decent pick up for cheap price... as every little bit helps. don't know how many bolts are on the LT1 but it's no more than a 10 minute job probably... and agreed that no tune will be needed

PNISSHR · July 21st, 2010, 05:11 AM

To swap the throttle body, disconnect the main inlet hose, all the vacuum lines, electrical connectors, and the throttle control cable. Remove the four mounting bolts, scrape the gasket material off the manifold, and swap over the factory throttle position sensor onto the new BBK throttle body. Installation shouldn't take more than 20 minutes.

got that from a carcraft article

ZEEMAN · July 21st, 2010, 01:03 PM

A throttle body upgrade by itself, you wont see much of a difference in power but combine this with a few other upgrades like cam, rockers, and tune... you will notice a big difference!

2fast4u · July 21st, 2010, 05:44 PM

Ok thanks everyone... the only bolt ons on this car are just a cold air kit and an exhaust system.... thanks again for everyones input...

BenSS · July 21st, 2010, 10:57 PM

While your swapping throttle bodys, look into maybe doing a coolant bypass as well. It takes maybe about a minute.

2fast4u · July 21st, 2010, 11:52 PM

coolant bypass??

PNISSHR · July 22nd, 2010, 12:54 AM

Quote:

Originally Posted by 2fast4u

coolant bypass??

There is an inlet and outlet where coolant runs through the TB that is not needed if you live in a climate that doesn’t have harsh winters. The whole idea is to actually prevent the TB from freezing shut. Most people don’t drive there F-body in these conditions even if they do live in such a climate. In the summer all it does is run hot coolant through the TB that heats it up, which in tern heats the air coming in. All you have to do is disconnect the inlet and outlet and put a brass hose connector in-between the two hoses that takes the place of it running through the TB. Just make sure to secure it out of the way therefore it doesn’t get caught in the belt.

RrCoX22 · July 22nd, 2010, 03:40 AM

Quote:

Originally Posted by PNISSHR

Just make sure to secure it out of the way therefore it doesn’t get caught in the belt.

this is the key to keep the lines real sturdy and stiff as it's normally hanging approximately 1 inch above the belt which would love to eat those lines

don't recall on an LT1 but I suppose it similar setup to the LS1's?

2fast4u · July 22nd, 2010, 01:23 PM

Ohh... ok thank you... I will try it... I do live where the weather gets kind of harsh in the winter but the car is kept in a heat storage unit.... thank you....

2fast4u · July 22nd, 2010, 09:12 PM

ok so i put the 52mm tb on tonight... and i gotta say,, i think the car ran better with the stock tb... just the reaction timing was better and now i have to hold on the pedal on the floor for a few seconds for it to kick into passing gear,,,,

PNISSHR · July 22nd, 2010, 10:26 PM

Quote:

Originally Posted by 2fast4u

ok so i put the 52mm tb on tonight... and i gotta say,, i think the car ran better with the stock tb... just the reaction timing was better and now i have to hold on the pedal on the floor for a few seconds for it to kick into passing gear,,,,

really? weird... Did you make sure the cable was hooked up right and that the screw was adjusted right to where it is opening 100%?

RrCoX22 · July 23rd, 2010, 02:41 AM

Quote:

Originally Posted by 2fast4u

ok so i put the 52mm tb on tonight... and i gotta say,, i think the car ran better with the stock tb... just the reaction timing was better and now i have to hold on the pedal on the floor for a few seconds for it to kick into passing gear,,,,

you should have any issues with loss of pedal response with a throttle body swap, if anything since you went larger you should have less hesitation... like mentioned you should over look that you have the throttle cable setup correctly and that your sensors are properly installed

2fast4u · July 24th, 2010, 08:13 AM

Checked over everything... everythings right... I changed the tps and now its got a high idle... so I checked the adjuster screw to turn the idle down and its not evening touch the stop... so I dunno... I'm about to give up on this junk

ZEEMAN · July 24th, 2010, 09:10 AM

Is the car OBD1 or 2? Maybe a vacume line?

2fast4u · July 24th, 2010, 10:42 AM

Ill be honest.... I don't know what obd1 or 2 means..... I did the coolant delete do I have to plug the holes where the hoses origanlly go on the tb? Could that be it?

PNISSHR · July 24th, 2010, 11:32 AM

Quote:

Originally Posted by 2fast4u

Ill be honest.... I don't know what obd1 or 2 means..... I did the coolant delete do I have to plug the holes where the hoses origanlly go on the tb? Could that be it?

Obd1 and Obd2 are the 2 different types of computers that were used on the these cars. I believe in 96 they switch over to the obd2 with a select number of the last 95 cars being obd2 as well. I know that my 95 had the obd2 plug port but still had the ond1 computer under the hood.
Don’t worry about plugging the coolant inlet and outlet. They are only for flowing coolant therefore do not affect the vacuum of the motor.
I am not sure what exactly the issue is but I am relatively certain that it is something little that may just need to be adjusted or fixed. Did you scrape off the old gasket and use a new one? are all vacuum lines hooked up in the right areas?

Edward-T · July 24th, 2010, 11:38 AM

could try unhooking the hot post of the battery for a few minutes, this will reset the computer, i always unhook it when changing the TPS, had issues with high idle until i started doing this so it couldnt hurt to try it, unhook the hot post, unhook the TPS, let it sit for a few minutes the plug the TPS back in and hook up the hot post, solved my problem.