buddiee

bradley23150

iTrader: (10)

On my IROC with a 357, I use a stock camaro v6 fan, with an aftermarket fan controller, and it works great.

RED86Z28

You should have no problem with the stock single fan cooling a 305. I had one and it cooled a 355 decently and never overheated. How is your fan controlled? There is probably more to your overheating than the fan.

buddiee

Im not trying to swap clutch for electric by the way.
My car is already set up for electric fans. I just had mine burn out on me, and threw it out without making any measurments first. All i do know is that it was an ACdelco


So im trying to find out where to get another.

Blown84Bird

Junkyard. Autozone sells a new motor

buddiee

can you elaborate a little more please?

Blown84Bird

You said You threw away the stock fan go to the junkyard get a fan assy and get a new motor for it. Stock 305 with stock fan should do just fine If Not you have problem else where ie.Rad t stat water pump

buddiee

Blown84Bird

Still no luck on a fan set up. What is your budget? And have you replaced any parts of the cooling system?

buddiee

All i need to know is how many cfms i will need for my v8 305.

8t2 z-chev

not sure of the exact specs,but i recon the stock single
fan pulls around 2000-2200 cfm,beware that the rating
of many aftermarket electric fans seem to be exagerated
the thinline style with long,thin blades of shallow
pitch just don't move much air.Also if the fan you have
on the car now is ineffective,check that the blades are
properly pitched for use as a puller-flat or inward curved
surface should be toward engine,rounded surface
toward front.

monster 91

I think it's best to keep the 16" fan you have if it works! My car over heated quick too with out a fan at all! And I also think that twin fans are cool to look at, but don't do the same amount of cooling that your current 16" fan could ever do! The 16'' fan is hard to beat for cooling! But dose not look as cool, as a twin fan set up! Just some honest advice to read I guess!

monster 91

I found a cfm out of a TBI 88 truck that worked for me! But I tried 12 different cfm's before I got it right!

travis401

iTrader: (1)

ive got my stock 305 electric fan taking up space in the bed of my truck. works perfectly fine. pay for shipping and its yours.

deadbird

You could have solved your problem in two ways w/o making a post.

Replace the motor on the stock fan

or,

measure the stock fan size (before discarding it) and order an equivalent sized aftermarket.

There's no need to get upset at members suggestions because you missed the obvious.

FYI, the stock 305 TBI fan won't run until 238°F (no a/c on) anyways, making it almost useless to begin with.

Blown84Bird

If you want cfm 2000+ should do it

500+hpta

It might seem stupid but have you checked to see if the fan is pulling air through the radiator. If not check that the air should be blowing into the enging bay.

buddiee

I thought about replacing the motor... but i dont know how to do that.
And like i previously mentioned, i threw out the old fan without even thinking... im an idoit... lol. anyways, i orderd a new fan. Check it out!

http://cgi.ebay.com/ebaymotors/ws/eB...=STRK:MEWNX:IT

deadbird

Sorry for coming off as harsh.

The fan you ordered will most likely be alright for your application. The general problem I've ever seen with fans like that is, they advertise great CFM but, that is for open air.

The blade pitch is so weak that they cannot draw air through resistance. There is a huge difference between open air flow cfm and cfm against static pressure (like the fan in your house air handler).
Some fans are designed to move alot of air unresticted (light pitched bladed fans)
Others, a lot with restriction, heavy pitched blade fans (belt driven, shaded pole, etc)

For the the price you paid and it a stock motor, I don't think you'll have an issue. The only thing may be a bit slower cool down times if you have a/c.

mikesanto70

I have a bone stock 91 RS 305 auto but I live in Phoenix and gets hot in traffic, Everything is new, rad, wat pump, therm, hoses, etc... Fan at stock settings, will making the fan come on earlier solve my problem, I would like to stay cool in 110* weather w/ a/c on parked, is this possible?

Blown84Bird

LOL good luck best bet big Rad and big fans

henryd3

iTrader: (128)

Yeah, it can happen. Well, I've got a bone stock 92 RS 305 5sp and I live in Bakersfield, Ca where it gets to 115 in the summer sometimes. Radiator is newish, everything else just in good shape. My car stays cool enough with a stock fan switch. I have a 180 thermostat, but that only slightly delays the inevitable temps. Cooler fan switches can help with that, but so far any aftermarket ones I've tried don't last as long as AC/Delco ones. Lots of folks on here like them though, depends on what you want. Only my experience, others may have different luck.

Blown84Bird

My car stays 210 in traffic and standing still so I'd think a 305 would stay cooler I have two fans and big aluminum Rad I just put in

camaronewbie

Stock replacement fan and mount is available from Autozone/Advance/whomever - they seem to be rated at ~1200 cfm as a stock replacement. Anyaftermarket fan that pulls more and fits in the space would be a good idea - for about $130 you have have a single that is double at 2500cfm. You can see lots of options at www.the-fan-man.com

Blown84Bird

Wow I would have never guessed 1200cfm LOL I always thought 800 tops lol

mikesanto70

Wow, thank you everyone for all of the replies, I feel so loved, LOL... just kidding, but thanks, really though, I'm going to check out fanman's sidewinder that pulls 2200 cfm, that might do it, or a fan switch to turn fan on at 195 and off at 180. Jet has one specifically for my Camaro, but someone said the A/C delco's are the only ones that last. Does anyone know for sure the CFM of the stock elec. fan on the 91 RS 305 TBI auto as well? Feel free to comment again folks, any advice is appreciated.

camaronewbie

You have a TBI car - nothing ECM related has anything to do with the fan. My recommendation is to skip the fan switch in the head, leave the old one there as a plug, and get an aftermarket fan controller. I tried the AC Delco, a cheap autozone, and an expensive one (Jet or Thermaster, I don't remember), and none of them performed longer than 3 months. I absolutely hate the stock fan switch - having to lose coolant (and getting it all in your face) everytime the stupid thing stops working is just stupid.

I got a Flex-a-lie controller over 3 years ago, it probes the radiator between the fins, was a breeze to wire, is fully adjustable temp wise, has provisions for dual fans, a/c, and in-cabin manual on. Mine also is variable - when it reaches temp, it runs the fan at 65%, if temp doesn't decrease in a few minutes, then it goes to 100% - saving that instant high amperage draw from the charging system. It was about $80 - check them out at summit or jegs if interested. I really love mine! Always works as I set it without fail!

mikesanto70

Is that flex a lite controller easy to mount?, how does it mount?, and i do not need to mess w/ the factory fan switch with this? Please let me know ASAP, it's getting quite hot here in what I call, "Hell on Earth" Phoenix, AZ in the summer time.
Thanks a bunch!!

camaronewbie

it's about 3in x 5in and maybe 3/4in thick. This looks like the one that I have:

http://www.summitracing.com/parts/FLX-31165/

Price has gone up in last few years - there are other brands with different price points and different bells/whistles.

slangdon

I have just put a long block 350 into my sons 1986 Camaro Z28. Left off all emission junk. I have a Holley Street Dominator intake manifold with an Edelbrock carb. My problem is over heating. Shop that installed engine for me put a new thermostat in due to the overheatring, however it is still overheating. Mechanics can't figure it out. They think it could be the radiator or the intake manifold. They think because this particular manifold doesn't have rear cooling ports. Any suggestions???? My first thought is change out radiator then work to the more expensive parts. Oh and the same intake manifold was on the old 305 with now over heating problems.

camaronewbie

Slangdon: If the stock radiator was fine before the swap, it's fine now I'm sure - stock radiator plenty enough to cool a 350. Is it overheating in town or at highway speeds? Electric fan? Is it running?

slangdon

camaronewbie- My thoughts exactly. If it work fine in the 305 why not fine in the 350? Electric fan is working and running. It blew the drain plug out on the highway. Replaced that and still overheated. Overheated just driving a coupel miles up the road. I should say it is a remanufactured water pump. But I'm going to try replacing the radiator with a brand new one and see if that works.

Zepher

iTrader: (1)

I've got the stock dual fans on my 305 and the drivers side fan keeps the engine at under 160* in 95* heat in stop and go traffic.
Got stuck in traffic yesterday for 20 minutes due to an accident 2 miles ahead, closed 2 of the 4 lanes so everyone was trying to merge at the last minute holding everyone up.

I probably sweated off a couple of pounds, black interior and no AC and no breeze.

camaronewbie

With the swap, were water pumps changed? V-belt system has standard rotation pumps, serp system has reverse rotation - did you switch belt systems with the swap?

slangdon

camaronewbie- Yes. I put a new (remanufactured w/ warranty) water pump on. I did not switch belts. I am going to replace the radiator, thermostat, and temp sending unit first. If that doesn't work I'll R&R the waterpump. I hope there is not a blockage in the engine. This is a brand new long block bought from a reputable company.

Mikeee91camaro

If the A/C is on... what do you think the engine temp. should be for the fan to now start cooling down the engine ??? I'm having a problem with the car overheating ..240/260 and the fan wasn't turned on
Then again it was working ok
Seems to be a intermittent prob.

Thermstat changed
relay changed
radiator new
new fan
sensor changed
New coolents in radiator

I ran OK with the thermstat out at 170/180 deg.
When it overheats the upper hose seems loaded with water and hard
which leads me to believe the therstat not open.
Temp was at 260degs

Mikeee91camaro

This is Mikeee91camaro ...my e-mail is perusich@att.net

camaronewbie

You can take the thermostat out and test it - put it in a pan of water on the stove and boil it and see if it opens.

The fan should run all the time with the A/C turned on, regardless of the temp.

Mikeee91camaro

I was told that the fan doesn't turn on till its 238Deg
I just couldn't believe that
the car is cooling off in the drieway and I plan on checking the hoses and radator cap
I have changed the thermstat out with a 195 ...2 times
Mike

camaronewbie

From the factory these cars were set to run hot - had to do with GM getting better emissions figures than anything I think - hotter engine burns off more fuel. Most of us would rather have a cooler engine, I know I do. That's why I installed the adjustable fan controller, and went with a 180 stat.

The standard factory fan switch is what is being mentioned - it's set for around 238 degrees. Alot of folks replace with a lower temp switch, so the fan comes on earlier. But, A/C increases load on the engine, thus creating more heat - All cars have the electric fans set to come on with the A/C regardless of the engine temps (all that I've seen anyway) - the manufacturers all know that the A/C is going to increase the engine temps alot and fast, so they just wire the electric fans to come on automatically with the A/C.

Mikeee91camaro

I took the camaro back to the place that did the repairs. It stayed at the 170 /180 deg on the road there for 6 miles. As soon as it got 3 blocks away from the auto place,,,it stated to heat up to the 240/260 deg mark.
What didn't happen was the fan did not turn on.
The switch and the fan replaced last week and for the most part... short trips indicated all was good. Till the wife drove it this morning. +
I felt the top hose and it was loaded with water / hard to press on it.
I also felt the bottom hose and it also was hard and not collaped.
Which is good....its the darn fan again thats not turning on ...
and like you say ..when in A/C mode that should be running...
I believe it to be the switch again. Will let you know tomorrow. thanks

Mikeee91camaro

Thanks Mikeee

camaronewbie

I hate the factory style fan switch in the head - I never got one to work well - I even spent big bucks on expensive brand name aftermarket switches that never lasted more than 60 days.

I spent $100 on a Flex-a-lite seperate adjustable fan controller, and never looked back. Best $100 I ever spent! Fully adjustable, probes the radiator so you don't have to remove the crap factory switch (leave it in as a plug), has provisions for A/C, manual on/off switches, easy to wire, and has worked extremely well for me for over 4 years now. Something to consider.

Mikeee91camaro

Mikeee91camaro

I THOUGHT I WOULD LET YOU KNOW THAT THE FAN MOTOR CRAPPED OUT AND WAS REPLACED AGAIN...ITS SEEMS TO BE DOING THE JOB ,,FOR THE TEMP. HAS BEEN AT 150 DEG'S
RUNS ALL THE TIME WITH THE A/C ON ...SO WILL SEE IF THIS DOES THE JOB

THANKS FOR ALL YOUR COMMENTS........MIKE

ikeepitreelz

This goes for everyone, I was pondering with Pinky, can it be possible that the motors spin less due to the age of the wiring (resistance), reason i said that is because my buddy has a 1987 GTA with less than 12k miles and the fans are noticeably spinning faster than mines, so i decided to change the electric motors but no noticeable change in speed which leads me to believe that maybe its the wiring? what do you guys think? can this be possible? will worn out relays (contact points inside) cause something like i mentioned, I noticed a lot of third gen cars suffer overheating problems, i have another gta and it overheats as well, even with a different engine i dropped in.

Brain

deadbird

The condenser has to have air moving across it for the A/C to work which is why the fan(s) turn on.

That doesn't make them all bad just because you have had poor personal experience with them. My '91 still has the factory fan switch (20 years, 219k miles) and it still works fine. They aren't flawless but, it is a simple, effective fan controller.
On my ex-'84, I put in a single electric fan and used a hayden fan controller from Summit. It lasted roughly a half year before burning up.
I put in a AZ sw505 (215°) fan switch with a relay and never had a fan issue afterwards. The TQ converter let go of the flywheel @ 286k miles at which point, I parted the car out.

Wiring going bad can slow the fan(s) down some.
Relay contacts either work, stick (arcs closed) or burn up (literally).

one92rs

iTrader: (5)

the flexalite controller works great. as well as turning the fans on at 60% first then ramping up if needed. it is a ghreat controller. i have been using them for the last 9 years on 4 different vehicles.