94 Track Car - T4M0 Questions

897 Views 7 Replies 4 Participants Last post by sluggish88, Jun 2, 2022

sluggish88

Discussion Starter · Jun 1, 2022

Building up my 94 GT. Will be a track only car. It has mechanical gauges and a Painless harness for the headlights, starter, alternator and taillights. I will be spraying it with nitrous. I have questions about this T4MO computer and if I will be able to use it for this build.

Will the T4MO computer still work and fire up the car if I:

- strip down the ECM harness to only run the circuits I need? (removal of CCRM, ABS, EGR circuit, ect...)

- run external relays to the ECM and Fuel Pump?

Will the T4MO computer still provide fuel enrichment if I spray it with a small dry shot (50 and under) in my hypothetical configuration above?

I have a Moates Quarterhorse to use as for tuning if I can do these things and get the car fired up.

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96pushrod

· #2 · Jun 1, 2022

The eec won’t really care if you remove those things if you’re tuning it with a qh. Abs has no bearing on the eec and the egr can be used through the qh as a 5v analog to wire in a wideband. Being as the ccrm is super small, I’d probably just leave it though. Unless it doesn’t currently work.

I also wouldn’t even bother ****ing with another factory eec if using nitrous. You can manipulate fuel pressure to compensate for the nitrous, but as far as there being a good way for the eec to retard timing and add fuel just when you’re spraying it, I don’t know.

Ditching the factory eec was the best thing I ever did. I’m sure others disagree, but if I could do it all over again, I’d do it sooner.

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Dwain

· #3 · Jun 1, 2022

Normally with a dry shot, the regulator is connected into the nitrous system. When the nitrous is activated, the regulator is pressurized increasing fuel pressure which increases fuel sprayed into the engine. I just looked over my CBAZA strat and I see some references to N20 but nothing specific to enrichment. I also dont know how the ecu would be triggered to go into N2O mode. Without the CCRM you will need to add fan relay(s), fuel pump relay and ecu relay, I dont know how beneficial it really would be to eliminate the CCRM because youre just going to have to add the relays back in. ABS can be disconnected or removed, egr can be removed but the position circuit is usually used for wideband monitoring.

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sluggish88

Discussion Starter · #4 · Jun 2, 2022

96pushrod said:
The eec won’t really care if you remove those things if you’re tuning it with a qh. Abs has no bearing on the eec and the egr can be used through the qh as a 5v analog to wire in a wideband. Being as the ccrm is super small, I’d probably just leave it though. Unless it doesn’t currently work.

I also wouldn’t even bother ****ing with another factory eec if using nitrous. You can manipulate fuel pressure to compensate for the nitrous, but as far as there being a good way for the eec to retard timing and add fuel just when you’re spraying it, I don’t know.

Ditching the factory eec was the best thing I ever did. I’m sure others disagree, but if I could do it all over again, I’d do it sooner.

I could use one of those Innovate LC2 controllers with a gauge for the wideband for now. But you make a good point about the timing retard. I have a dry kit jetted small but I also have a wet kit with larger noids jetted a little bigger and was wanting to potentially run both, each on a window switch. Figure like a 150 off the line and a 50 on the big end. I was thinking maybe 6-8 degrees locked in to see if it handles because last track outing it was handling the 125 at 10. Trust me man I want to ditch the factory computer as well but I can’t dish the coin for a standalone system on this car just yet so I’m trying to see if I can’t use the stock injector harness + ECM harness but stripped down and the Moates. I wanted to get a Holley terminator but they discontinued the product I wanted to purchase from them so now I’m looking elsewhere at MS2PNP or PIMP. Pro-M is too much for me.

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sluggish88

Discussion Starter · #5 · Jun 2, 2022

Dwain said:
Normally with a dry shot, the regulator is connected into the nitrous system. When the nitrous is activated, the regulator is pressurized increasing fuel pressure which increases fuel sprayed into the engine. I just looked over my CBAZA strat and I see some references to N20 but nothing specific to enrichment. I also dont know how the ecu would be triggered to go into N2O mode. Without the CCRM you will need to add fan relay(s), fuel pump relay and ecu relay, I dont know how beneficial it really would be to eliminate the CCRM because youre just going to have to add the relays back in. ABS can be disconnected or removed, egr can be removed but the position circuit is usually used for wideband monitoring.

I might be overthinking the baby shot. I’ve messed with a lot more but I’m just more concerned about the T4MO not working right if I de-pin all the circuits I don’t need.
I have the fans on a high/low switch + relay on their own and I could deal with the ECM and fuel pump relay on their own if it means running this antiquated nonsense how I want haha. Yea you make a good point about the ECM knowing when to go into nitrous mode. I’m pretty sure there isn’t a way to hold two tunes inside the Moates at the same time, but if there was, something like a circuit running off the nitrous arming switch would maybe work.

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Dwain

· #6 · Jun 2, 2022

You can use an f3v2 chip with rotary switch that can store more than one tune. Mine can store i believe up to 8 tunes. I also remember there being a way to use a rotary switch and adding a 4 pin connector to a QH allowing more than one tune.

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aurdraco

· #7 · Jun 2, 2022

By track, do you mean road course? If so, no tech inspector or legit sanctioning body will allow nitrous.

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sluggish88

Discussion Starter · #8 · Jun 2, 2022

aurdraco said:
By track, do you mean road course? If so, no tech inspector or legit sanctioning body will allow nitrous.

No, I meant the 1/8th and 1/4 mile track. You just need a blow down tube if running the bottle inside the cabin for the 1/8th and 1/4 mile. Nitrous on a road course car? Would be kind of inconsistent I'd think!

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