Better throttle response
Can someone tell me what size throttle body i should use..i want to install some 12 hole injectors and i am going with a 62mm throttle body...but my buddies said i can go larger..how large can i go with my tb...and does anyone have a part number for a correct set of 12 hole injectors..there for a 97 xj with a 4.0L eng..
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A 62mm is fine. 12 holes are not going to add any power that wasnt already there with good working stock injectors. You could save your money on those 2 items and put it toward an ECU tune that will probably net you more gains.
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Many people have better throttle response after switching to 4 or 12 hole injectors. I have 12 hole injectors, APN header, 62 MM throttle body, and a 2.5" exhaust with no cat and my throttle is very sensitive.
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Originally Posted by 00t444e
(Post 3549902)
Many people have better throttle response after switching to 4 or 12 hole injectors. I have 12 hole injectors, APN header, 62 MM throttle body, and a 2.5" exhaust with no cat and my throttle is very sensitive.
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Originally Posted by Cummins93
(Post 3549900)
A 62mm is fine. 12 holes are not going to add any power that wasnt already there with good working stock injectors. You could save your money on those 2 items and put it toward an ECU tune that will probably net you more gains.
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62mm is the biggest you can go without opening the opening in the intake itself.
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Originally Posted by 97grand4.0
(Post 3549954)
Disagree with the injectors, I added 4 holes and the response off the line was immediate and noticeable.
The price I got from the mods above comes out to $600-700. I would bet that more power and responsiveness can be had with a 89 octane tune for less money. Those gains would be backed with objective data from the tuner. |
Who makes tunes for our computers, and can they tune it so it will make more power but still run regular 87? There is no way I am paying for premium fuel.
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JTECs can be reprogrammed. Syked ecu, Flyin Ryan and maybe Chris tuned if he is still at it. 89 is mid grade but allows more advanced timing. I run premium 93 on my set up and for what I get out of it it's worth it to me.
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Everything I had seen pretty much said that 4.0s are tapped out from the factory and a tune doesn't really change much on them. I've never very seriously looked into a tune though.
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Originally Posted by SatiricalHen
(Post 3549978)
Everything I had seen pretty much said that 4.0s are tapped out from the factory and a tune doesn't really change much on them. I've never very seriously looked into a tune though.
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I tried contacting Flyin Ryan a few months ago about tuning my Dakota but never got a response.
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Try him again. He got right back to me not long ago or contact syked ecu.
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If u need a throttle body. I'm your man
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What he said^
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