5,200 rpm stop making power on dyno

[CAMTWO1070]

Heres some screenshots of the internals of an EEC...

Notice on the injectors its very very comprehensive especially the injector High and Low Slopes....

Injectors have very specific on an off times/etc and must be entered into the EEC correctly to worl correctly...Theres no magic into trickingthe EEC other than having the injectors youre using upgraded.......

Thats just thetip of the iceberg....The MAF transfer must be fixed too...

Now a days they sell yellowtop 19's upgraded to 24's on Amazon and ebay but Id invest in a chip and a tuner at this point...

Good Luck OP

 

[96pushrod]

Putting 210lb injectors on a 302 and saying it will still run is highly false...

Before I get into that dont forget that an EEC is setup for the injector size its supposed to use and if you stick in a different injector the EEC doesnt recognize any injector you put in wont flow right and if the OP doesnt know he can pull a sparkplug and see the burn or add a lambda gauge and see his efficiency..

When I rebuilt my old f250 16yrs ago I tried putting bluetop 24lb/hr injectors to compensate for the 1.7 rockers I put in...The engine ran but the EEC didnt recognize the injectors as being yellowtop 19's so it ran limited,....

I sent the 19's out to be upgraded to 24's and put them in and the engine ran again but not as good as it should of so I sent the EEC to Kenne Bell and had it reprogrammed at the same time Mustang Magic was putting a KB supercharger in my 2001 Bullitt w/4.6 as they were the ones that suggested it and it worked out killer even with a speed density computer..

Now for the 210lb statement...Holley sent me 120lb injectors in a 36lb box and I didnt realize when I installed them.Theres no way low impedience injectors can be controlled in a high impedience environment without overheating the injectors and even with my chip I had giant issues getting it tuned until I realized the issue and I had them injectors in with a Terminator X setup that I thought was junk then ripped it out and put a Ron Francis harness and after debugging the harness still had major tuning issues with fouled sparkplugs and very gas loaded oil until I noticed the injector size was way off the mark..

Holley made good on sending me the right injectors but didnt respond to my gaswashed cylinders I had to rehone,pistons I had to rering or bearings I had to replace either and comes to show they dont stand behind their BS...........

Let me tell you my engine didnt run very well and sparkplugs lasted 10-15 mins idling and not even driving............

These plugs have literally 10 minutes of runtime on them........They look like they ran alot longer...............LOL

The exhaust was so rich even outside with a slight breeze it made my nostrils sting badly and it gaswashed the hell out of my cylinders too.........

Good Luck getting ahead with this issue OP

You guys fail to see what I’m getting at. OF COURSE you can’t put 210lb injectors on a stock eec tune and expect it to work. It would be entirely foolish to even attempt.

What I’m saying is if you have an injector that is large, it can be tuned to work - with almost any size. You want to run a deka 80? Easy. Fic 1200? Yep, that’ll work too on a eec4 with a quarterhorse. You get to a certain point on a eec4 where it makes entirely no sense to do, but a program with more control it’s easy.

 

[TOOLOW91]

Could be a multitude of things . For what it’s worth I have made over 720 through a aod with a stock 89 coil . My tuner Brian made 1200 with a 6al and a stock coil . They are more potent then you think .

Stops at 5200 - does it hit a brick wall and lay over ? Is it breaking up ? Are the valves floating ?

.234/.232 .555/.565 on a 112 I wouldn’t consider big . It’s decent for sure but duration is on the smaller side I’d think . How high you think it should be going ? Will it even make power there is another question

 

[Bullitt347]

I have 220 lb/hr Precision Turbo FI on my engine, it idles just fine and has great part throttle response. Am I using a stock ECU? Oh, Hell No!. Lol.

 

[General karthief]

Need some answers if anybody is going to help.
@vipsymbol ?

 

[vipsymbol]

A good dyno operator should have been able to tell what the reason for the lack of RPMs, I think he wasted his money on the run if the operator didn't discuss issues but without the graph showing more info we are stabbing in the dark.

 

[KZGUNS]

Are you sure your timing is correct, advancing etc? I had a situation where the car fell flat around 5k and i had messed up my timing. this was on megasquirt but if your balancer slipped before you timed it could be off enough.