what do you think for a 1995 plymouth neon sohc should i go with a 52 or 55 mm throttle body. i am going to be opening up the exhaust too.

 

The 55 is the automatic throttle body right?

I say go with the bigger one, more air = more power.

 

wrong....

more air will only equal more power if you add more fuel and have mods to support it all...

there is no need for anything larger then a 52mm until you start making big power

 

exactly... change the injectors, put a exhaust header... that gonna be better!

 

if the motor is still almost stock, bigeer injectors will not be good for it either

 

well i bid on a 52 mm tb on ebay and it ends in one hour and the bid is at $9 and $8 shipping

 

well i purchased it for 17 dollars figured not a bad deal seeing there are no good junk yards around here closest is 25 miles. i got the 52 mm throttle body they said it came off of a 95 manual transmission but they said it is 52 mm. dont know if someone added it onto their manual, but anyways we will see.

 

Overall, I'd say you'd get 5 hp and a meaner sound with a 55mm throttle body, judging from these two sites.

http://www.sportcompactcarweb.com/pr...t_2/index.html

http://www.allpar.com/neon/performance.html

 

All tb's are 52 at the top? The manuals funnel in, atx's dont. I would do the jeep tb swap. Cheap. I seen the dyno for a 52mm over a 49, it was 2hp? maybe it was 3 but doubt it.

 

I am running with a 55mm TB, I could not tell you any diffrence because I never drove the car without it. I am sure I will notice a diffrence when I replace the intake with the ported and polished one I have.

This weather needs to get warmer here before I can start anything.