Hey guys, New here, I have questions ,my maverick:)

Hey guys this is my first post ont his forum and I dont know why I didnt join a maverick forum before but whatever. My question is.. does anyone know what the specs are for a 1972 maverick 302. Like what kind of horsepower and torque it really made? And also if any one knew the specs on the head combustion chamber, intake ports, valve size, etc ???

 

specs

Here is a few specs. HP 143@4200 Net brake HP.

heads: combustion chamber 58.2cc valves: I =1.78 E =1.45

not sure of the torque or intake port flow.

these specs are based on a bone stock original 1972 302

 

The exhaust valves were not 1.54. They are 1.46...

 

my bad

sorry my bad they are indeed 1.45 not .46 according to tom monroes book "how to rebuild small block ford engines" pg. 28

 

They are 1.45 "point something". A lot of people just round them up to 1.46...

 

Re: specs

What is exactly net brake horsepower ? wheel horsepower flywheel horsepower what ? Do you know what the compression was ?

 

net brake hp

net brake is at the flywheel with all engine accessories.

compression ratio is 9.5

 

Re: net brake hp

Jeez I cant believe that power was so low..I wonder what they did to the motor in 72 which brought it down so much. I have a april 1971 Hot Rod magazine here that shows a test thet did on a comet and a grabber. They ran a horrible 17.1 @ 81 mph they say for both cars that it has 210 hp @4600 & 296 lb-ft @2600. They added some parts to the comet which included Headers, an intake, and a four barrel carb. That brought the time down from a 17.4 @79mph to a 15.4 @90mph

 

The answer to this question is posted in other threads although at the moment I do not have the ambission to go looking for it.
Summed up they changed the cam and the deck hight as well as cramming on all kids of emisions control crap that sucked up horse power. This is supposed to be some sort of side affect of the war and the gas rationing and all that type of garbage.
I am not entierly sure I have that straight but that is what I understood.

 

There seems to be some discrepancy in the specs.

My Chiltons says that a '72 had 9:1 (not 9.5) compression and made 210 HP at the flywheel (not the rear wheels).

I think '73 was the first year that they started measuring the HP at the rear wheels.

My '73 had 8.0:1 compression and 138 HP at the rear wheels (stock).

I am assuming (someone please correct me if I'm wrong) that the '70-'72 302s had taller pistons, as the combustion chamber sizes are listed at the same from '68-'76...

 

I have never heard of companies rating them at the rear wheels in any year or type of car but I always thought it did make sence seeing some of the numbers from the maverick.

 

Basically it's because everything that is stock on the motor was designed for reliability, smog emissions, and fuel consumption. Power was their last priority with Mavericks and Comets as they were economy cars, not classic muscle cars. Putting a new set of heads, intake, dual exhaust with headers, four barrel carb, better cam would easily be worth over 100 hp, depending on what you pick it could be two or three hundred horsepower over the stock number.

 

anyone have any suggestions on heads for my motor? I would think edelbrock rpm or something like that which ever gave me the most power for the money I guess

 

It was 1972..

...when manufacturers changed the way that they report HP.
There was some tuning diffences in the 302 between '71
and '72. I believe the compression did drop a little bit according to some of what I have read.

In reference to the previous post, I don't think 9.5:1 compression is correct, it should have been less than that. I don't have docs here to verify.

The 302 2V was never intended to be a performance engine. The strongest 302 (boss not included) was the 4V of '68(1st yr.) and '69.
It was rated at 250 HP. The 4V was dropped after that and other changes made as Ford got out of performance. The 302 in your car is reliable and fairly efficient, exactly what Ford intended. It can be awakened using aftermarket or factory parts if you wish.
As far as performance, you have already discovered that it was no street brawler.

The 4V carb reappeared in 1983 on the HO Mustang with a different firing order (changed in 1982 to 351W firing order) and then was dropped forever after the 1985 models.

Seth

 

comp

Tom monroes book "how to rebuild small block ford engines" on pg. 38 claims the 302 from '68-'72 with a 2bbl and 58.2cc heads was 9.5 compression the 4bbl engine was 9.4 in 1973 till 1976 it was dropped to 8.0