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Topic: Falls flat on its face at redline (Read 769 times) previous topic - next topic

Falls flat on its face at redline

I did the LA3 swap in my 86 TC and car is very responsive but I am still having a problem when I hit red line 6000-6500rpm( car parked in driveway). The car shakes and sputters and does not want to continue to accelerate. It has new 255 walbro fuel pump, kirban adj fpr, new flowed and cleaned injectors, plugs gapped at .34, new fuel filter, new ranger cam and I replaced one bad HLA that took forever to pump up. I didnt replace the other ones which may be as old as the car.

Am I experiencing valve float? Are the old HLA's giving out at high rpm? Whats up?
Motorsport FMIC, Boport 1.5, Boblee header, gutted upper, profiled lower, phenolic spacer, Accufab fpr, LA3, Boport stage 3 big valve head, 57 trim/stage III Perfromance Techniques custom turbo, stinger 3" DP and custom 3"exhaust, AEM wideband, custom aluminum carnk pulley, Merkur custom A/C setup, PA performance high output 3G alt, dual oil catcj cans, Motorsport Valve cover,full Motorcraft tune up kit, 22psi of LOCO!!

Falls flat on its face at redline

Reply #1 –
You're hitting the factory set redline in the LA3 computers programming. I believe its set at 6250 or there abouts. Unless you modify the computer with a J3 chip or something, it isn't going to rev any higher no matter what you do to the motor. Also, I did the ranger cam swap in my 88, and it simply isn't a high rpm cam.  You can adjust it's power band with an adjustable cam gear though.  As soon as finances permit, I'm replacing it with something better, which is just about anything else, LOL.
88 TC 5speed, 168000+ miles, stock 2.3T long block, ported RFE6 exhaust, Evergreen T3 running 15#'s.
Up next: FMIC, fresh air intake, ported intakes, ported big valve head.

Falls flat on its face at redline

Reply #2 –
Are you saying that you are reving it to the redline in park with no load?  This is not a good thing for any engine.

TED

Falls flat on its face at redline

Reply #3 –
Quote from: RDOG;291988
I did the LA3 swap in my 86 TC and car is very responsive but I am still having a problem when I hit red line 6000-6500rpm( car parked in driveway). The car shakes and sputters and does not want to continue to accelerate. It has new 255 walbro fuel pump, kirban adj fpr, new flowed and cleaned injectors, plugs gapped at .34, new fuel filter, new ranger cam and I replaced one bad HLA that took forever to pump up. I didnt replace the other ones which may be as old as the car.

Am I experiencing valve float? Are the old HLA's giving out at high rpm? Whats up?


You mean the engine doesn't want to goto 7k, 8k, or 9k RPMS.. LOL I wonder why... Seriously do you think it makes any more power above 6500?
[SIGPIC][/SIGPIC]

Falls flat on its face at redline

Reply #4 –
Factory EECs have a 6250 fuel cut, it ain't going to rev higher without a chip or EEC tuner to raise the limiter...
 

Falls flat on its face at redline

Reply #5 –
I think I now know why the factory did this.

TED