what kind of work can be done on our throtle bodies? are there any aftermarket ones? how well do/can ours flow? who has info on this subject?

 

correct me if im wrong, but a bigger throttle body wont do anything, at the most very little, because the v6 just doesnt have the air requirements of a larger engine. a bigger throttle body would probably just throw the tune of the engine out of whack because it was designed to have a certian air passage and your going in and changing it.

 

I believe very few people make aftermarket TB's for the V6's at this time, HOWEVER I think there was a foreign company that made them..it was discussed on here before...I'm wanting to say they're Swedish but I think that's wrong. I know SOMEONE has to still have the link...

A larger throttle body WILL add power, but so little that it's hardly worth the cash to fork out.

 

i forgot to mention that i do have a highly modded 3.1. i don't think that a larger/better flowing TB will hurt it, it should help a fair amount.

 

a better flowing throttle body shoudl help anyone, granted we don't need a double butterfly throttle body like the ones found on TPI v8's but bigger is still better. I would however consider porting and polishing the intake plenum while you're at it. That'd be the spot of true concern in making a bigger TB because you don't want the plenum to bottleneck the whole idea, and reduce what lil' flow you had, not to mention disrupt the airflow and make things more turbulent. But i too remember seeing some company who made and sold aftermarket TB's for the v6, but there was only one company.

 

Try Canadian.

http://www3.sympatico.ca/fjpeters/throttlebodies.htm

 

i have ported everything...heads, full intake, and cleaned up TB (also running headers) but was considering doing more to it. i also have the full setup for a 4 barrel carb which i am considering going to. what do you guys think would be best? remember, i have a highly modded engine (including big cam). right now i'm running the TPI with the stock chip and i'm guessin that is probably holding back the power in my little 3.1. also, for the vacuum advance distributor, can i use the same coil that the 3.1 tpi setup uses (the dual plug coil)?

 

I dont see where the coil would matter if your using elec, or vacume advance. But I have never dealt with it.

A bigger more TB would most deff help on your engine since its so radical.


I myself am wondering, since the stock TB is 52mm, and these damn 62mm are so expensive, im wonding what the effects of adapting a 75mm would be.

 

Dale, When you crack open the throttle with a TB that large, what happens is the airflow will slow down so rapidly and cause a bobble or hesitation and hurt throttle response. Then when air velocity picks back up, there is only so much CFM that these little six cylinders will draw- even modified. To there largest draw a 62mm will be adequate in size.

62 is too big for my semi-stock 2.8- hence why I haven't even bothered installing my 62mm on it- bought it for the tweaked 3.4 I am slowly building.(My house comes first, then kid, then wife, and if any time and money is left I tinker with one of the cars when I get a chance )

 

Darn, cause I knew where I could get a 75mm for 50 bux. Then modify my new 3.4l intake to match. I guess I will have to wait tell the 62mm is made, then cut my arm off to get one.

 

My understanding is
trying to increase the need for volumn of increased injested air.
These 60* engines do not spin fast enough.
Like a Honda at 10,000 RPMS
IF ya increase outside air flow to engine, you win better, right away.
IF ya can increase exhaust flow, you also win.
Go that route first, then see if ya still feel need for larger TB.
Kinda doubt it.
Look at it this way.
The stock 93-95 3.4 TB size, is exactly the same as the old 2.8/3.1 size.
Sez something.
The 3.4 intake is a one piece seamless intake. That says something about the 2.8-3.1 design.
No the 3.4 upper intake does not exactly properly fit the older 2.8/3.1 lower intake.
No a Feiro TB does not exactly properly correctly fit the F body upper intake.