Forums
New posts
Search forums
Image search
Shop
Amazon Store
T-Shirts
Stickers
Members
Current visitors
Supporting Member Upgrade
Sponsors
About
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Image search
Search
Search titles only
By:
Search titles only
By:
Menu
Install the app
Install
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Jeep Wrangler YJ
YJ General Discussion
Any performance advice for 2.5 4-cylinder?
Reply to thread
Message
<blockquote data-quote="deadpool1" data-source="post: 441085" data-attributes="member: 21229"><p>ever do Iron head milling by hand (called porting)???? not easy work nor CHEAP (IRON =hard) and risks damage to the head, or breaching the water jackets there. or who knows what.? there are custom rockers for the engine that are called high lift but must not cause valve to smack top of pistons.</p><p>add more or bigger valves?, you tell me how? , there are no custom heads for this engine to that level of extreme. (that I have seen )</p><p>FYI</p><p>you do not know that? when you go WOT (wide open throttle) the PCM now goes to open loop ( wot throttle max or fast right foot are both PCM full <strong>ENRICH mode events</strong>) even pushing throttle fast does this too. on all EFI cars actually.(gasoline)</p><p></p><p>and is no longer 14.7:1 AFR but goes to like 13:1 and 13:1 is<strong> max power</strong> , 100% free and EPA legal. free of costs, amazing no?</p><p>Maybe CAT removed will make more power (bolt on CAT option? and bypass pipe) (NSA is reading my post now and telling EPA what I said)</p><p>13;1 is called PCM ENRICH MODE (aka open loop) below.</p><p> the higher flow injectors will not make more power, lacking more air.</p><p>The air intake path is not restricted here. exhaust is.</p><p>I see no racing heads sold for any 2.5L jeep engine,</p><p>pure physics after all its 13.1: 1 now WOT, in fact perfect if FPR is not dead is it. I told you low power (1 of 50 cause) FPR bad does that.</p><p>(more displacement or boost)</p><p>or custom heads not sold but sure any shop will port it at $150 per hour and no warranty if it cracks the head day2.</p><p>if the O2 is bad and it goes way too lean power will drop but never at WOT the O2 is OFF LINE AT WOT.</p><p>AT WOT THE MAP +ECT + iAT + RPM , SETS INJECTION RATES. GOING TOO RICH POWER IS LOST. DUE TO<strong><span style="color: rgb(184, 49, 47)"> UNBURNED FUEL.</span></strong></p><p>THIS answers are for warm 180f engine not cold, this is hot mode proformace, 5 gas physics. the STOICH is 02 closed loop cruising.</p><p>[ATTACH=full]122480[/ATTACH]</p></blockquote><p></p>
[QUOTE="deadpool1, post: 441085, member: 21229"] ever do Iron head milling by hand (called porting)???? not easy work nor CHEAP (IRON =hard) and risks damage to the head, or breaching the water jackets there. or who knows what.? there are custom rockers for the engine that are called high lift but must not cause valve to smack top of pistons. add more or bigger valves?, you tell me how? , there are no custom heads for this engine to that level of extreme. (that I have seen ) FYI you do not know that? when you go WOT (wide open throttle) the PCM now goes to open loop ( wot throttle max or fast right foot are both PCM full [B]ENRICH mode events[/B]) even pushing throttle fast does this too. on all EFI cars actually.(gasoline) and is no longer 14.7:1 AFR but goes to like 13:1 and 13:1 is[B] max power[/B] , 100% free and EPA legal. free of costs, amazing no? Maybe CAT removed will make more power (bolt on CAT option? and bypass pipe) (NSA is reading my post now and telling EPA what I said) 13;1 is called PCM ENRICH MODE (aka open loop) below. the higher flow injectors will not make more power, lacking more air. The air intake path is not restricted here. exhaust is. I see no racing heads sold for any 2.5L jeep engine, pure physics after all its 13.1: 1 now WOT, in fact perfect if FPR is not dead is it. I told you low power (1 of 50 cause) FPR bad does that. (more displacement or boost) or custom heads not sold but sure any shop will port it at $150 per hour and no warranty if it cracks the head day2. if the O2 is bad and it goes way too lean power will drop but never at WOT the O2 is OFF LINE AT WOT. AT WOT THE MAP +ECT + iAT + RPM , SETS INJECTION RATES. GOING TOO RICH POWER IS LOST. DUE TO[B][COLOR=rgb(184, 49, 47)] UNBURNED FUEL.[/COLOR][/B] THIS answers are for warm 180f engine not cold, this is hot mode proformace, 5 gas physics. the STOICH is 02 closed loop cruising. [ATTACH type="full" alt="AFR-GAS.JPG"]122480[/ATTACH] [/QUOTE]
Verification
Post reply
Forums
Jeep Wrangler YJ
YJ General Discussion
Any performance advice for 2.5 4-cylinder?
Top
Bottom