The "Safe" Limit, cutting out all the crap.

[Werkedperformance]

The 2.3L ecoboost safe limit is around 400ftlb MAX with considerations for longevity..... 350-360 ftlb is where the respected tuners are cutting the torque off, specifically under 3500 RPM because of cylinder pressure. You can make more but it will expose any weakness in the system. Torque is the result of cylinder pressure, but it also lifts heads, bends rods, and exposes weak gaskets. I've been trying to find the limits of the longblock, because that will kinda determine what upgrades are worth the increased performance ceiling they offer, or what upgrades are the best value.

Reference 1:
https://www.focusrs.org/threads/how-much-is-too-much-torque-conflicting-info.49713/

Some hidden gems in that thread. Like:
1. How Ford controls excessive torque with throttle valve and wastegate control.
2. How Ford builds computer control systems in "module format" to work across platfroms, IE trail control.
3. Vaguely describes how the "torque curve" below 3500 is harder on the engine than the curve shifted higher in RPM with less cylinder pressure.


Reference 2:
https://www.thedrive.com/news/30310...le-684-hp-from-2-3-liter-ford-focus-rs-engine

Major points:
1. ALL DI. ALL DIRECT INJECTION. http://www.xtreme-di.com/ Is the supplier here.... This is running E30, but its all DI no IDI or port injection. If you follow me you know. DI systems struggle to FLOW the fuel for the insane HP applications.
2. "Lag" the big turbo for the high HP takes longer to fully spool. Listen close to the soundtrack, the turbo isn't fully "lit" until about 4500 rpm, IMO.
3. E30...... even High test octane isn't enough knock control, meth is needed.....
4. Street or trailability of 1-3...... depending on your application.

Reference 3:

https://www.speedperf6rmanc3.com/pr...-long-block-for-ford-rs-2-3l-rated-700hp.html

1. This is a "700 hp" bottom end build.
2. 2.0L block...(solid deck)
3. Balance shaft delete
4. Keyed Crank, Timing Gear & Crank Pulley

Cross Reference 2.7 TT on big turbos:
https://www.autoevolution.com/news/...-rwhp-shows-off-at-the-drag-strip-137912.html


7MTI550 is the Manual transmission going into the Bronco. Its only rated for 400 lbft.

Love to hear thoughts on the topic from others in the know.

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[IfIHMadeA2021Scout]

The "safe limits" on the 2.3 are probably right where the 2.7 get interesting.



I don't know but I'm watching what should be an informative discussion.

 

[mC.242]

Sounds like I won't bother tuning my 2.3L then since I can already get 325 stock with premium fuel.

 

[HBTFD]

Just get a 2.7. Or a superduty with a power stroke so you can really tune it up.

 

[Squatch]

I don't know but I'm watching what should be an informative discussion.

Informative? Which one of us is on the wrong forum?


Thanks for the link @Werkedperformance

 

[Tricky Dick]

Livernois has a deck brace that is supposed to take the HP limit to about 800. 2.0L blocks are preferred by a lot of serious builders.

 

[Werkedperformance]

Livernois has a deck brace that is supposed to take the HP limit to about 800. 2.0L blocks are preferred by a lot of serious builders.

Updated with mo' links.

 

[Herbie]

You guys might as well be speaking Urdu.

 

[Werkedperformance]

Informative? Which one of us is on the wrong forum?


Thanks for the link @Werkedperformance

You have more reading to do. Updates added

 

[Nickp]

I really hope there’s a tuner Bronco scene. I personally am not into that whole crowd but:

1. I would laugh my ass off watching a little 2 door base 2.7 on drags slicks running like crazy in the 1/4 mile
2. It would offer a ton of upgrade parts for off road racing too.

 

[Werkedperformance]

I really hope there’s a tuner Bronco scene. I personally am not into that whole crowd but:

1. I would laugh my ass off watching a little 2 door base 2.7 on drags slicks running like crazy in the 1/4 mile
2. It would offer a ton of upgrade parts for off road racing too.

These engines are "old" it's all figured out. How much do you want to make? the transmissions are the unknowns.....

Mickey ET streets front and rear? why not? I'll build it for ya. I think we can hit high 10s on a 2.7/ auto.....

 

[Montana Bronco]

I would laugh my ass off watching a little 2 door base 2.7 on drags slicks running like crazy in the 1/4 mile

 

[JoeSpeed]

Im more concerned about the transmission, always internals to deal with factory limits if need be.

Arent these the same engines in the Mustang? Sure itll be fine, though I was just thinking FMIC+Charge Pipes/HFC/CAI/Wastegate Actuator/DV/Catch Can/Tune at most

 

[Werkedperformance]

Im more concerned about the transmission, always internals to deal with factory limits if need be.

Arent these the same engines in the Mustang? Sure itll be fine, though I was just thinking FMIC+Charge Pipes/HFC/CAI/Wastegate Actuator/DV/Catch Can/Tune at most

''Rougly'' the same as the mustang/ ranger/ focus RS.... there are variances in there we can pick apart if necessary.

 

[JoeSpeed]

''Rougly'' the same as the mustang/ ranger/ focus RS.... there are variances in there we can pick apart if necessary.

Btw, is there an exhaust/DP combo that doesn't drone when not in use. Problem with my Audi is did a Turbo back and while I'm fine with it now, dont wanna'nother droney 4banger when Im cruising on the highway

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