iroc-ice

Right now my car has a 305tbi. Im going to be putting a 350tpi in it (probably with a mild cam and new or ported heads). my question is, can I put 145mph gauges in and still have accurate readings?

Stekman

I think its a plug and play swap.

https://www.thirdgen.org/newdesign/tech/gauges.shtml

iroc-ice

Cool. Looks like my mph reading will still be accurate. All I have to do is change the oil and water sending unit. Thanx.

IROCtheRoad

I just did this yesterday! And yes, it is a the most direct swap there every was or will be. I was even able to use my original odometer. If you want to do this, unscrew the 3 screws on the face plate of the original speedo and slowely take the odometer out with some needle-nose pliars. Do the same with the one from the 145 speedo and then just swap them out. But be very careful. I attempted to take apart my 115 speedo and do it that way, but I ended up completetly destroying it. It now makes a nice wall decoration.

If that wasnt clear, feel free to PM me tomorrow. I'm waaay to tired!

ShiftyCapone

iTrader: (7)

The only problem you may have is people questioning the accuracy of the miles on your car. Otherwise it is plug and play. I had no idea that you could swap odometers like that. Now you can tell people you have the origonal odometer and replacment speedo.

88Camaro350

I had a 145mph speedo in mine for awhile. Everything worked fine except the speedo. It was 10mph off but I think it just needed calibrated. The speedo always read 10mph even when I was stopped lol.

I'd like to get another 145 cluster but I think I will go ahead and get a convan classics cluster thing and full it with autometer sport comp gauges

ShiftyCapone

iTrader: (7)

That sounds normal. Our speedos are horrible off especialy as speeds increase. You cannot really calibrate them.

Sitting Bull

Mine was also off by 10 mph when I switched to a 140 speedo. My buddy pulled the needle off and replace at the 0 mph spot on the gauge. Now it is pretty close to correct

88Camaro350

I'm hoping some autometer gauges will make it more accurate. I got a autometer water and oil pressure guage already. Stock oil pressure gauge showed 40 at idle at cold startup...autometer shows 65psi...

Water temp on stock gauge was 160 degrees...autometer is showing a steady 182 degrees.

iroc-ice

Thanx for the replies. I'll try this sway another time. My car is heating up WAY to fast ; think its the thermostat. So the gauges will have to wait. I'll probably get a 145mph cluster off ebay and some glow gauges from this one site.

IROCtheRoad

Wow! I had absolutely no problems installing mine. It is completely accurate, all the gauges work... works fine.