2.5 wrangler tbs

ABES-XJ

ABES-XJ

New Member
Joined
Jun 7, 2009
Location
morganton nc
just about everyone i talked to said a tbs was a waste of money. well i got one anyway. i be the first to tell ya that is the best 35 bucks i ever spent on my jeep. its not like i put a bigger motor in it but for 35 bucks, it was def worth it. i would say i gain idk 5hp. normaly when i stat up a hill on the road it just slows down bad, now its not so bad it still slows down but no where near like it did. just thoght i would let yall know incase you wanted to get one. and that was in a 2.5 i cant tell ya how it do in a 4.0
 
My best friends mom has a 2.5 yj when she bought it someone had already put a cold air intake, borla header and full exhaust, tb spacer for a 4.0, 4.0 tb with intake bored to match, electric fan, custom head work and mastercraft suspension seats front and rear!. Its the most random thing because it has no lift no lockers and stock wheels and tires!! Anyway its pretty peppy
 
I know what they say but when I put mine on I could hear the difference and I "thought" I could feel the difference and I don't think it hurt anything. If you really want to make it effective you need to bore the intake too. That was my next project then I sold the jeep and got a 4.0.
 
2.5 tbs

If I am thinking straight, a tbs is really a heat reducer, so that with a cold air intake should give you plenty of extra hp in the 2.5L. :driver:
 
like adam said i have read that the tb on the 97 and up 2.5 and 4.0 are the same. if that is so no need for bigger tb or intake bore.
 
adam greene said:
isnt the throttle body on a tj 4.0 and 2.5 the same
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brandonabee said:
like adam said i have read that the tb on the 97 and up 2.5 and 4.0 are the same. if that is so no need for bigger tb or intake bore.
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The 2.5 is 60mm and the 4.0 is 62mm

some website said:
why would one want to do this swap? Well, here are some real life dyno numbers taken from the 4 Bangers United board;
The base line is a 2.5L stock throttle body without a spacer (i.e. stock set-up)
1) Poweraid Helix throttle body spacer - +2 HP, 8% less airflow. Evidently, the helix bore has lips that extend beyond the intake and throttle body openeings and actually cuts down on airflow. But, the spacer does cool and extend air volume, hence the horsepower increase.
2) 4.0L throttle body only - +6 HP, 16% more airflow.
3) 4.0L throttle body and grind out the intake opening to match the throttle body opening - +13 HP, 29% more airflow.
4) 4.0L throttle body, Poweraid throttle body spacer, and grind out intake opening - +16 HP, 27% more airflow. The spacer is cutting off some airflow, but like in #1 it is cooling the air resulting in an increase in horsepower.
5) 4.0L throttle body, grinding out opening in Poweraid spacer, grinding out intake opening - +24 HP, 39% more airflow.
After install, tested results were; at 2800 RPM, torque was up 16% and at 1800 RPM, torque was up by 14%.
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Link to whole write up on it

Pretty good power increase
 
thanks. the spacer i got said 2.5 and 4.0 so thats good. but now i guess i need to grind out my intake and get a tb. burrel you think you could help me wit that? we can get us a tb for 65 bucks.
 
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