78 Chevy Monza

[hotrodpc]

Thats pretty cool. No pun intended. Looks like some parts from Home Depot in the gardening section, but whatever works. It should bring in plenty of air.
You can get alot more than 16 degrees of mechanical advance. Your mechanical advance comes from your centrifical weights and springs on the dizzy. Thats why I like to set the initial timing to 4 or 6 degrees, then just set the centrifical/mechanical to come on sooner. It also avoids running warm issues, and hard start vapor lock type problems.

 

[66nova]

I'm not saying the timing is not the issue, but you are going to have to have it pretty far advanced before I can imagine it causing it to get too hot.

I have my distributor locked at 38 degrees advance and its a 11.5:1 compression 400SBC. It will sit and idle all day long and not get hot. Granted I do have a good electric fan and "Be Cool" radiator.

 

[63chevystepside]

I have a weight set on the dizzy i used the middle springs and i replaced the weights and i got the timing at 12 degrees before hooking up vaccum adv. then it does not advance till i give it gas then it advances.---Thats mo than home garden stuff lol i got it in the mail-lol.I have the stock raditor and running a steal fan-i tried electric fans before on a slightly smaller cam and they didnt work.i had to get a high flow themstate and a steal fan but not clutch fan to get it to work and it was all fine till i went to this bigger cam(other than the clicking)---i will try and back it to 4-6 and see what happens-i had it at 8 and it did it? It runs amd sounds ok and about 16 inches vaccum-im get oil through that lifter but im border line in being able to back it off and or tightening the bolt on that rocker any more matter of fact i put two small washers then the nut.-had to.

 

[hotrodpc]

I am not saying the timing is all to do with the heat issue either. What kind of guage are you using Allen? Guess I can't refer to you as 66 now, which 66? Did you ever get a bigger radiator? I find it hard to believe electric fans didn't keep it cool. Maybe not big enough. I sure like electric fans when I can use them.
Thats funny Nova, you probably have to be at 38 degrees just run with that cam you got in that one. Well, not really, but is sure not gonna idle at stock spec.

 

[66nova]

I am not saying the timing is all to do with the heat issue either. What kind of guage are you using Allen? Guess I can't refer to you as 66 now, which 66? Did you ever get a bigger radiator? I find it hard to believe electric fans didn't keep it cool. Maybe not big enough. I sure like electric fans when I can use them.
Thats funny Nova, you probably have to be at 38 degrees just run with that cam you got in that one. Well, not really, but is sure not gonna idle at stock spec.

With as much lobe seperation as I have, it is suprizingly mild. It will idle at 800rpm just fine, but I like it better at a 1000.

One time the distributor hold down did not get tightened all the way and the timing slipped down to like 26 degrees. It ran fine. You couldn't really tell just driving it around, but damn it was a dog out of the hole.

At 38*, I've never had an issue starting it either. That being said, you want a good battery and a high torque starter because I currently don't have a start re tard built in the ignition. But the car is very streetable. It sees around 3000-5000 mile a year on 93 octane.

 

[hotrodpc]

I am not saying the timing is all to do with the heat issue either. What kind of guage are you using Allen? Guess I can't refer to you as 66 now, which 66? Did you ever get a bigger radiator? I find it hard to believe electric fans didn't keep it cool. Maybe not big enough. I sure like electric fans when I can use them.
Thats funny Nova, you probably have to be at 38 degrees just run with that cam you got in that one. Well, not really, but is sure not gonna idle at stock spec.

With as much lobe seperation as I have, it is suprizingly mild. It will idle at 800rpm just fine, but I like it better at a 1000.

One time the distributor hold down did not get tightened all the way and the timing slipped down to like 26 degrees. It ran fine. You couldn't really tell just driving it around, but damn it was a dog out of the hole.

At 38*, I've never had an issue starting it either. That being said, you want a good battery and a high torque starter because I currently don't have a start re tard built in the ignition. But the car is very streetable. It sees around 3000-5000 mile a year on 93 octane.

That does sound very streetable. I ASSUMED you have a much bigger cam the way it ran. Nice !!!

 

[63chevystepside]

I am not saying the timing is all to do with the heat issue either. What kind of guage are you using Allen? Guess I can't refer to you as 66 now, which 66? Did you ever get a bigger radiator? I find it hard to believe electric fans didn't keep it cool. Maybe not big enough. I sure like electric fans when I can use them.
Thats funny Nova, you probably have to be at 38 degrees just run with that cam you got in that one. Well, not really, but is sure not gonna idle at stock spec.

With as much lobe seperation as I have, it is suprizingly mild. It will idle at 800rpm just fine, but I like it better at a 1000.

One time the distributor hold down did not get tightened all the way and the timing slipped down to like 26 degrees. It ran fine. You couldn't really tell just driving it around, but damn it was a dog out of the hole.

At 38*, I've never had an issue starting it either. That being said, you want a good battery and a high torque starter because I currently don't have a start re tard built in the ignition. But the car is very streetable. It sees around 3000-5000 mile a year on 93 octane.

That does sound very streetable. I ASSUMED you have a much bigger cam the way it ran. Nice !!!

Hugh!!! 66chevystepside-66nova-Hmmm!His is a bad to the bone rod-mine Hmmm-Lets just say its a working progress-any way stepside would work larry and sure nova would work for the other 66-But thats ok-no biggee. I have tried 1 14inch electric fan pulling on the front and 2-yes- 2 ten on front as pushers,one 16inch just on front as a pusher,2 ten on back as pullers-heck i tried it all and made for sure-i even put that stuff that suppose to cool it by 20degrees-tried a flex fan with a14inch on front as a pusher-i left NO stone un turned it did not cool-i pressure tested it-switched caps-tried different thermostates...NOTHING AT ALL WORKED-even had the stock 3 core high effecient raditior re rodded.Finally got a high flow thermostate(180) and a steal fan-Bam-snap-it stayed 180.Now i have a bigger cam-so im going to try and go with a reg. thermostate and a 15-17cap and see what happens.I use a electric gauge and it is mounted on the passenger side rear of the head.There is not much room under the hood on the monza-nova knows the pain thats why he is upgraded.I might try a 14inch on front as a pusher with the reg. steel fan---i know your probably thinking one pushing and one pulling might hurt and not help-it did help before but not enough-i know it might be best to go ahead and dish out 500.00for a raditor but heck might not need it if i do then...On the timing nova i think your right i can get alot more advance out of it and i will be trying to run more mechanical adv. and no vaccum adv.i was just referring to -with 91octane and at 900rpm 16*degrees max advance with vaccum still hooked up.im at 12* with the weight set and vaccum still hooked up-i have noticed like nova mentioned that he notice kind of a dog out the hole.

 

[63chevystepside]

I think i will have to take off that head and have it looked at-i think its a valve guide-valve-stud-type of a thing.Im going to do a compression test then go from there.

 

[63chevystepside]

I am not saying the timing is all to do with the heat issue either. What kind of guage are you using Allen? Guess I can't refer to you as 66 now, which 66? Did you ever get a bigger radiator? I find it hard to believe electric fans didn't keep it cool. Maybe not big enough. I sure like electric fans when I can use them.
Thats funny Nova, you probably have to be at 38 degrees just run with that cam you got in that one. Well, not really, but is sure not gonna idle at stock spec.

With as much lobe seperation as I have, it is suprizingly mild. It will idle at 800rpm just fine, but I like it better at a 1000.

One time the distributor hold down did not get tightened all the way and the timing slipped down to like 26 degrees. It ran fine. You couldn't really tell just driving it around, but damn it was a dog out of the hole.

At 38*, I've never had an issue starting it either. That being said, you want a good battery and a high torque starter because I currently don't have a start re tard built in the ignition. But the car is very streetable. It sees around 3000-5000 mile a year on 93 octane.

Would you think maybe why its getting hot cause i dont have enough timing in it? The cam is a 480lift-288duration-110lobe-rpm 2200-6200.

 

[hotrodpc]

Have you ever read this thread stepside?
http://forums.h-body.org/viewtopic.php?f=2&t=26662 The mystery of H body cooling? Good one of you to read. I still have the radiator out of my Monza, its either a 2 or 3 core, but I think its a good one. I know the tanks are good, so even if you wanted just for tanks, take it to a radiatior shop and have them put a 4 core in the tanks. Of course all that does is increase the cooling capacity a bit. Some people feel a 4 core is counter produtctive cuz only the front core gets cooled anyway. I think I'll disagree with that. I designed my own radiator for my 64 GMC with a biggo cam to sit in Los Angeles rush hour traffic and it would run at 200 with a 180 stat, where as before it would run at 230. Also, are you using a fan shroud? That is very important. But you oughta read that thread. IT also talks about timing 30degree full advance at 3000rpm. Of course that depends on your cam too. Are you sure of your power band range?? for a 480 lift, 288 duration, that seems a bit tall on the 2200-6200. For some reason I am wanting to say, and its just a guess, about 1800-5500. Espeically with a 110 lobe center. That oughta give you better low end range. 2200 is not all that low end and if thats the case, you may even be able to step up to a single plane intake if that is your powerband range. I prefer low end power, and dual plane intakes, but if you are gonna get up with their with the big boys in the higher rpm, you may be resticting yourself. Also what stall are you running in the trans?