PowerHungryBill

Need some insight guys,, never been much of a rotory guy due to lack of knowledge but I have tackled one. 93 with a single Greddy T-78 upgrade. If all the solenoids that control the twins are done away with and not pluged in, will the engine run GOOD ? I am having problem with acceleration. It idles good and will accelerate slowly but if I punch the throttle it boggs bad and will start back firing like the timing has gone wacky. HELP !!!!!

Davin

iTrader: (14)

if you took out the solenoids, but still have the double throttle in the UIM, then that is your problem.

we need more info man...

PowerHungryBill

I dont have any of the solenoids connected.. I ran the fp regulator straight to vacuum and plugged all the other lines. This thing has been messed with before and has no check engine light in function but the bulb appears to still be in place.. unable to pull codes unless you know of another way

Mahjik

iTrader: (1)

What ECU are you using?

PowerHungryBill

stock ecu... dont know the numbers off of it if that is what you are needing to know

Mahjik

iTrader: (1)

Removing some of those solenoids will throw the car into full limp mode. The ones which control emissions don't cause a problem, but some of the others will.

PowerHungryBill

which ones do I need to keep on the engine...Is it ok to just have them plugged into the harness.. with no emissions and single turbo, I really dont know that there is a need for the solenoids.... unless you can give me info I dont know and I dont know much about this engine

Mahjik

iTrader: (1)

What you need is a programmable ECU like the PFC from Apexi.

PowerHungryBill

would that be the ony way??? does it plug into the factory harness

Mahjik

iTrader: (1)

Well, you need something programmable. The stock ECU does not adjust. So it's mapping will be for the stock twins.

The Apexi does "plug in".

PowerHungryBill

I am really trying to just get this back on the road for now.. even stock boost for now would work... enough money out of pocket..need to stop the bleeding for awhile. Nothing mentioned with the turbo upgrade but all the writing is in Japanese also.

Mahjik

iTrader: (1)

10 PSI on a T-78 is not even close to the same thing as 10 PSI on the stock twin turbos. Apples and oranges. The manifold pressure is just that, pressure. It's not measuring the amount of airflow which a T-78 is going to provide a lot more of even at the same pressure...

If they both provided the same power at the same pressure, there would never be a need for a different turbo now would there?

PowerHungryBill

oh I know there is more power there,,that is the reason for the upgrade, I have a wideband on it and I will monitor that closely,, but I would just like to get it running if possible. Does everyone who upgrades the turbos to just one have to change the ecu ???

PowerHungryBill

does limp mode on this car just not allow you to quick accelerate.. most other Japanese cars will not allow the motor to rev over a certain rpm like 2k or 3k

Mahjik

iTrader: (1)

While I'm telling you this is a bad idea, you have two choices:

1. Put the solenoids back (except for the ones controlling emissions). Just hook them up to the harness, don't bother with vacuum lines.

2. Wire in 330 Ohm 1/2 watt resistors where the solenoids "should" be.

Mahjik

iTrader: (1)

Limp mode keeps you from destroying the engine, which is the path you are on right now.

PowerHungryBill

ok. I will try that.. now with the power fc and stock injectors,, what is reasonable boost that others have seen as safe with that set up???

Davin

iTrader: (14)

dude, you are going to have to do your research. everything has been discussed in other threads over and over and over again.

PowerHungryBill

pretty much all the solenoids that control the original turbos have to reconnected ??? just to keep limp mode away

Davin

iTrader: (14)

http://www.turborx7.com/images/Techn...e_diagram2.jpg

this is the diagram. anything emissions, you will need a block off plate. for the double throttle, you need a block off plate for that and take out the butterflies too.

PowerHungryBill

I will do more research also but thought I would get direct feed back if someone was out there..

Davin

iTrader: (14)

well, you essentially disconnected your solenoids that control alot of your car that is still on there without the block off plates. plus the fact that your disconnected your turbos too by doing that and out of whack. hopefully you did not destroy your engine by doing what you just did.

PowerHungryBill

so actually remove the butterflies for the double throttle control from the throttle body ???

PowerHungryBill

Have not been able to even rev the motor unless done slowly..I have block off plates on the air control valve

Davin

iTrader: (14)

as stated in the FAQ: http://robrobinette.com/double_throttle.htm

every other question you will ask will be here... in the FAQ's: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/