Tick tick tick...

[91lxttrim]

I romped on it tonight against a buddy in his notch and afterward I hear a ticking sound coming from the engine. I still have stock injectors with all those mods listed below. If I blew a hole in a piston would it tick? could it be a bent pushrod, stuck lifter, or a rocker arm problem? I rolled in at about 2:00 in the morning so I couldn't let it idle to diagnose it tonight, but first thing tomorrow I will try listening to the valve cover. I'm bummin - this is my DD.


BTW, he had a good pull on me I couldn't close.

 

[stang8urimport]

Please tell me you are kidding about 19 lbs injectors with a god damn Trick Flow HCI package AND A T TRIM!? OMG... Please.. sell your Mustang.

 

[poneypower89]

HCI and a t-trim blower??? Geezz man... upgrade ur fuel system for crying out loud!

 

[bentley429]

Are you SURE they are the stock injectors? I really hope not...

 

[GearHd6]

HCI and a t-trim blower??? Geezz man... upgrade ur fuel system for crying out loud!

He has, the 255 fuel pump and top notch FPR. Injectors are not a major part of the fuel system are they?

 

[GearHd6]

By the way to answer your question. I dont think you'll get a tick from a hole in a piston plus it would burn oil through the hole. It sounds like a valve train problem to me. Maybe a loose rocker, colapsed lifter. Did you miss a gear and over rev it or put it in a lower gear than you were supposed to? Like a 2nd to 3rd shift became a 2nd to 1st shift? Or a 3rd to 4th shift became a 3rd to 2nd shift? Just trying to draw a picture here.

 

[5.0Droptop]

Its prolly just a header gasket. The stupid bolts loosen up and after a hard romp it burns the gasket and it ticks. Sounds just like rocker tick but I bet you blew a header gasket.

 

[5.0Droptop]

BTW he is proly using a FMU.

 

[91lxttrim]

Yes, I do have an FMU, and I know I should have bigger injectors. It sounds more like a metal tick than a header gasket, but I hope it's just a gasket. That's true about the burning oil, didn't think of that. Today I'm going to pull the valve covers and see what's up. Just looking for some advice or past experiences. Thanks

 

[5.0Droptop]

Before you pull it apart, Use a long screwdriver put you ear to the handle end and use it like a stethascope. Put the metal end to differnt areas and listen for the niose. I still think its only a header gasket. Try tightening all your header bolts before you take it apart.

 

[Mr. Rustypwnz]

Mine is doing the same thing, I blame the shaft mount rokers I have, all are tight, no bad lifters, no bent pushrods. Oh well I guess Ill live with it.

Josh

 

[91lxttrim]

Problem solved

http://forums.stangnet.com/showthread.php?p=6363949#post6363949

 

[stang8urimport]

Still.. HCI with a ****ing T trim? You could run 1000lph fuel pump and 4 FMU's.. the injectors only have a certain capacity, and are for sure maxed to the limit.

 

[jrichker]

Injector HP ratings: divide flow rating by.5 and multiply the result by the number of injectors. This uses a 100% duty cycle. These ratings are for naturally aspirated engines.

Example:
19/.5 = 38, 38 x 8 = 304 HP
24/.5 = 48, 48 x 8 = 384 HP
30/.5 = 60, 60 x 8 = 480 HP

The preferred duty cycle is about 85% maximum, so for a safety factor mulitply the final figure times .85.

304 HP x .85 = 258 HP
385 HP x .85 = 326 HP
480 HP x .85 = 408 HP

Remember that the above ratings are at 39 PSI. Increasing the pressure will effectively increase the flow rating. Example: a 19 lb injector will flow 24 lbs at 63 PSI, and a 24 lb injector will flow 30 lbs at 63 PSI.

A 19 lb injector at 90 PSI only passes 28.86 lbs. You can get to a point to where the pressure is so high that things start leaking & breaking very easily. It is time for new injectors.