After hauling this kit around for 10 years I finally found the time to install it , followed the instructions to a T and everything seems to be working like it should except for an over heating problem . I recently drove it 25 miles , 45-55 mph and no problem went up to 1/4 on the guage came out from shopping after 45 min. started it up and it went up to 1/2 and stayed there almost home , went down a bit after I fan the heater full blast !!
I took this run after putting in 1 gal, of anti freeze , water wetter, and distilled water , this did seem to help as I always ran 100% or close to it as I once was told anti freeze had a higher boiling point but have been corrected , I think .
Think I need someone that knows more then I do and Paxton never got back to me

 

You might have better luck in the FI forum.

 

I don't have a Paxton - I have an ATI but I am not following your problem. I have a 90 also and my temperature guage goes about half way as that is about 195-200 degrees (roughly) which is the normal range for my 90. Why do you think it is overheating again?

However, assuming I misunderstood, I installed a DeWitts radiator, Edlebrock hi volume water pump and went with a 180 stat, and, most importantly, went with a tune that turned on the fan earlier to match the stat.

If you are running the stock tune, your A/F ratio can be too lean which would lead to overheating. I recommend a Moates Ostrich to help with your tuning needs. I know that when I ran the stock program, it seemed to run fine for shorter trips put a 2 hour drive it overheated VERY badly for me.

You definitely need a BIN file that enriches the fuel. Larger injectors might also me necessary.

How much boost you getting out of it?

 

Adding boost to a car without checking the Air Fuel Ratio and Knock readings is only ever going to end in tears.

Things to consider that will create heat -

Fuel to lean
Timing Retarded
Heatsoak from hot components
Air lock in the cooling system

 

I have a new stock rad
Hi flow Stewart water pump
ajustable fuel preasure regulater set at 38 lbs
new 24lb injectors

I was running a 160 thermostat never went over a 1/4 on the guage , also never had heat but no big deal here in FL
Paxton's kit was for 1990 & 1991 vetts
it came with its own thermostat housing and double thermostat installed this is how it works thermostat is installed in a T center comes from motor to the top of the rad then the other smaller out let with a 75 degree thermostat ( 2 in one ) goes to a T installed on the bottom hose with a hose ( size of a heater hose ) goes to that T .
I put it back to stock but did not help so reinstalled it and tried the water wetter and 4 quarts of anti freeze topped off with distilled water and that has helped .
it does seem to cool down after the fans kik in but I think they are coming on late , don't know how to fix that other then a hot wire and a switch in the car .
The kit also came with a water alcohol injection system think something is wrong the water bag was filled up with air when i got home .
think they said 6-8 lbs bost .
I have a friend with a OBD1 scanner and have been told I need to do this but he has been busy , I have a cable for my lap top and down loaded a couple of free programs but could not get them to work

 

6-8lbs of boost, you think?
Whats your air fuel ratio when cruising? at WOT?
The H20/Alc setup will be to help with Knock. Is it safe to run without that working correctly?

I'm not trying to be an *** but these are questions that really need answering if you don't want to end up breaking things.

 

fuel /set at 38 lbs 24 lb injectors
Timming retarted /was set at 10 degrees BTC kit calls for 5 degrees BTC
Heatsoak from hot components/not sure what you mean
Air lock in the cooling system / I have run it off and on several times let it cool down and refilled it to the point it does not go down any more .

 

You're in Florida. Freezing shouldn't be a problem. Run distilled water with a bottle of water wetter. It'll run cooler than with your gallon of antifreeze.

 

Well I have considered doing without the antifreeze but one of the fellows on here was able to get my laptop hooked up to scan whats going on ,
Timming is to high at WOT
running way to rich at WOT
suggesting a good tunner nere by here in FL. nere the Villages and someone to burn me a new chip

 

Someone must have tuned your car and jacked up the timing and fuel.

 

Well ya never know what a previous owner might of done , I did a lot of bolt on stuff but have removed most as to the Paxton instructions ! had a hyperchip but removed that ,car ran well but they can always be better I kind of lost intrest when my friend installed a 502 in his 86 , hooked everything up including AC with no body changes 200 MPR, car has a tag, the ZR1 they should have built ! he loves to spank Porsche

 

I'd take it to a tuner and have them check it out.

 

I managed to get Joe hooked up with tuner pro.

Fueling at idle and cruise. Infact at all times other than when on boost is super rich with BLMs of 108.

He's getting maximum knock retard of 11degrees when wot.

Fueling seems to be reasonable WOT as the O2 sensor was showing steady 850mv or so.

I advised that he stays off the throttle thats if he has to drive it at all!

 

I don't know if this might through a munky wrench into the findings but I did have problems with the 02 sensor so I installed a 2 wire pre heat 02 sensor it is threaded into the collector pipe of the headers as they where not getting hot enough to operate the stock 02 sensor.
Is there a tunable ECM that would work for me or is that big buck stuff ?