TonyJ

Hey guys, the new buildup is done and we've got the car running great on the LTCC. Floor it and at 4400 rpms, it acts like it's hitting the rev limiter. It's not a sputtering, cut the fuel limiter, it is a very friendly limiter that just seems to hold the revs at 4400. I sent the LTCC box back to Bob, who updated the software and checked it out. Put it back on the car today and it's doing exactly the same thing. Stock computer, 42lb Lucas injectors, racetronix walbro in-tank pump. The only thing I know of that's a little funky is that when we relocated the battery to the trunk, it's reading lower voltage. It doesn't get into the red, but with all the power accys on, it gets close to the red.

Has anyone experienced something like this?

The PCM has been programmed for the injectors and the car runs really well up to 4400.

Tomorrow we're going to put it back on the dyno and watch the LTCC LEDs and see what they do under load. I'll try to get a fresh batch of codes.

Racetronix

At 4400RPM is your g/s upwards of 415-425?

TonyJ

Sorry Jack, I'm feeling dumb here this morning...

Please explain g/s and where it's measured/read.

The fuel pressure holds firm and slightly rises from 42 to around 44 at 4400.

The car is running a '93 intake without an adjustable FPR.

TJ.

grygst76

when you relocated the battery, what gauge wire did you use and what about the ground? Relocating the battery should not cause such a drop in voltage unless the wire is not thick enough or it is too long you added resistance.

TonyJ

Used one gauge and sweated all the connectors. It's also got the cutoff switch. The ground is from the battery to a spot on the sheetmetal in the trunk that we ground off and used star washers on.

grygst76

When I relocated mine I used the original ground plus the trunk body. Ground matters more then power IMO most of your electronics are up front of the car and they also need a ground source. Try running another ground to the original up front

TonyJ

Yea, that's a good idea. I'll give it a try.

TonyJ

Figured out what the problem was and thought it was worth letting everyone know.

Because we built everything at once, we had the supercharger belt off to break-in the motor and seat the rings. It was the supercharger itself that was restricting the inlet air and holding the engine to 4400 rpm. Duh...

It was so consistent we thought it had to be ignition/pcm related.

Oh well, I'm back in business!

Later, TJ