bigals87z28

Ok, ive tossed several ideas around about what do to reguarding the speedo.

I have an 87 Camaro, so I do not have an electric speedo like the firebirds.

I was looking at all my options to make my stock guages work, and the only way I can see it happening is if I swap out the electric pick up and swap on the gear in the tail shaft.
I believe some Jaguar conversion company makes a set up, but cant I just use the gears off my 700R4?

ls6iroc

iTrader: (1)

this is another way.


http://www.hawksthirdgenparts.com/el...ometerbox.aspx

Pocket

iTrader: (24)

The PCM still wants the electric VSS input from the trans. If you did convert it to mechanical output, the very first thing that would have to be done is use a mechanical to electric inline adapter

Give this a read
https://www.thirdgen.org/forums/ltx-...auges-lsx.html

Ramair21

iTrader: (3)

five7kid

iTrader: (14)

The cable drive box would be a lot easier (and probably cheaper in the end) than swapping in a 4th gen LS1 dash. The advantage of the 4th gen dash is it allows you to maintain the vapor recovery system with a 4th gen LS1 fuel tank, along with the fuel level gauge. Using a 4th gen tank and sender is problematic with a 3rd gen fuel level gauge.

Obviously, there's more than one way to skin a cat.

Ramair21

iTrader: (3)

Are you refering to the complete 4th dash or the 4th gen cluster? I did the cluster swap for maybe no more than $150. Much cheaper than getting that cable converter which I still can't see why it cost so darn much.

five7kid

iTrader: (14)

4th gen cluster requires 4th gen tank.

There are lower priced cable drive boxes out there.

Ramair21

iTrader: (3)

This is true. I thought he was doing the whole 9 yards with his swap.

bigals87z28

I am doing a 4th gen tank swap as well.
Im not really a fan of the 4th gen guages. I love the look of the current gauges.
Why do you need the 4th gen dash in order to keep the emissions stuff?

five7kid

iTrader: (14)

The PCM uses the fuel level as input for the vapor system. The fuel level signal goes directly to the PCM. The PCM output to the fuel gauge is serial. The 3rd gen fuel level signal is analog. To the best of my knowledge, no one has yet come up with a way to convert the serial signal to analog. And, you can't split the 4th gen fuel level signal.

From what I understand.

bigals87z28

So let me get this straight...I cannot use the 4th gen tank unless I get a 4th gen dash?
Or at least not the emissions stuff mounted on it?
Ugh, you gotta be kidding me!! I hope I didnt break anything reguarding my emissions stuff that I pulled out of the car!!

Pocket

iTrader: (24)

You can use the physical tank regardless of the dash. Its the emissions stuff that requires a serial input from a digital cluster that youll be lacking

five7kid

iTrader: (14)

You can't use the PCM-commanded vapor recovery system and use the 4th gen fuel level sender unless you use a 4th gen dash.

You can change the resistance of the fuel level sender and use a stock 3rd gen fuel gauge (documented in a thread on this sub-forum). You can keep the vapor stuff on the 4th gen tank and just leave the vapor line unhooked and it'll vent the tank fine (at least it has for me so far).

The vapor recovery system and fuel tank pressure were disabled from my PCM.

bigals87z28

Ahhhhhh ok well then I guess Ill leave everything else be. I assume this includes the evap solinoid mounted near the driver side fuel rail?

I thought about a 2nd route, swapping out my speedo and tach with AutoMeter Sport-Comp 1's. They cost about the same as the Cable X box after everything is said and done. Thoughts?

five7kid

iTrader: (14)

The solenoid on the engine is commanded by the PCM. It'll be inop if you don't provide the pressure and level signals to the PCM. I just removed it and didn't provide a line from the tank.

I did programmable electronic speedometer and fuel level gauge with 4th gen tank/pump/sending unit on the LS1/T56 swap. With the upcoming LS1/4L60E swap, I'm sticking with a 3rd gen tank, so the stock fuel gauge will still work. But, my speedometer is cable drive - I'll probably be getting a cable drive box and use all stock gauges.

bigals87z28

Hrm...well I guess my next question is if I keep the third gen tank, do I keep the stock charcol canister?
I would really like to go with the 4th gen tank, but I think that there might be more problems.

Ramair21

iTrader: (3)

If you dont have to worry about smog, You will be fine with a 4th gen tank. All you have to do is swap in a 0-90ohm fuel sender and your all good.

bigals87z28

I do have to worry about smog.
My old 305 TPI with no air or EGR, with a ZZ4 cam, just a cat passed inspection.
Are there any dangers by not connecting the evap line? If I remove the solinoid off the driver side of the engine, can that cause problems, emissions or otherwise?

Ramair21

iTrader: (3)

Just dont run a line to the engine and do what five7kid said. let it vent out at the tank. What type of smog do they do?

bigals87z28

Sniffer test in the tail pipe. But im really not sure exactly how purge and evap help in all that to be honest.


As for the Speedo problem, I puchased an AutoMeter Sport Comp guage that looks as close to stock as possible. In the future, Ill replace it with a full AutoMeter set up.

Ramair21

iTrader: (3)

I live in cali so in order to get the car legit i had to have all smog stuff put on. They even went under the car and check to see if it was there. But you can delete it using any tuning software. You should be fine man! The LS1 uses a single gas line for fuel deliver and return. You just need a T in the fuel line. The LS1 donor car will have this. Good luck man.

bigals87z28

Thats not a problem, Im gunna keep a cat on it. My old 305 TPI with a ZZ4 cam, no EGR or AIR passed NJ, so the LS1 should be at least as clean as that. The PCM has already been tuned out for a lot of stuff such as EGR, and rear 02's.

scooter

iTrader: (11)

I thought in another thread someone said as long as you have the proper VSS input into the PCM and the correct fuel level resistor (stock 4th gen) that it would work? I could easily add the wires for the pressure sensor and evap inside the car and run them to the 4th gen bulkhead at the back of the car. But if this isnt going to work I wont bother with any of it.
When I did my 4th gen tank I swapped the resistor board but I kept everything I took out/off the 4th gen tank so I could put it all back on in the future.

bigals87z28

James, you and I have to have a sit down and go over everything.
Im picking up my trans today.