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Topic Review (Newest First)
10-04-2013 04:29 PM
h0trod let me just say that in my unprofessional opinion, pontiacs are one of the most well designed engines. hands down.
sure theres always someone faster, who makes more power. but how many other manufacturers can you take a 326 head, slap it on a 455, keep in stock, a water pump, a distributor, fuel pump, oil pump, oil pan, valve covers, among other items, and slap it on my 326 my 389, my 400, or my 455?

when i was a super novice, please note that after 15 years, i am still a novice, i was plagued with a 1968 pontiac lemans sport. 354,th350,10bolt, and a bent frame. i bought that car for 500 bucks, drove it almost 50,000 miles with little or no problems, besides tires and brakes. after that car got me so far, i fell in love.

now i am the proud owner of a
42 4 door pontiac with a cadi clip, pontiac 400 th400 12 bolt
42 2 door pontiac on a 71 caprice frame, 400, ST-10 and a 9"
64 2 dr hardtop bonne 389 and a th400,
68 lemans sport, 354 m-21 9" and early 60's truck arm rear sus.
68 tempest convertable with a 389, m-22, 12 bolt
66 Hallett v-drive flatbottom with a soon to be 421.
30 olds 5 window with a worked over 354 edel heads, st-10, solid cam, 9"
and soon to have a full framed 63 ranchero with a pontiac 440

PONCHOS FOREVER!

oah, and can you chevy freaks change intakes without moving the distributor???
10-04-2013 02:58 PM
LATECH
Quote:
Originally Posted by GMCTRUCKS View Post
Hey guys I have a set of 15 heads with exhaust manifolds someday I would want to built a engine for a 74 GTO I would love to get my hands on.
The #15 heads from the 400 were 75 CC -small chamber BUT if they were from a 455 (1970) they should have 87 CC chambers PERFECT size for a street 400 on pump gas. And with the big valves they are sought after. Of course you need to check them (cc them)
10-03-2013 09:47 PM
WDCreech
Quote:
Originally Posted by GMCTRUCKS View Post
I also ha d a 76 Firebird 5.7 well my brothers 74 5.7 Firebird would eat me up untill I put a different cam, lifters and 4 barrel carb oh I used the stock heads it had. Hey guys I have a set of 15 heads with exhaust manifolds someday I would want to built a engine for a 74 GTO I would love to get my hands on.
A 350 Pontiac is actually a 354, so it would be 5.8L.
10-03-2013 08:05 PM
GMCTRUCKS
Quote:
Originally Posted by GMCTRUCKS View Post
wallaceracing.com has tons of good info.

Back in high school I had a 1970 GTO boy could it move.

I wonder if a Poncho engine could fit in a 93 F/S GMC truck and how much trouble it would be? I have a set of 1968 15 casting number heads that have never been touched they were off a big Catalina.

My dream would be to have a 400 in a 69 Firebird.
I also ha d a 76 Firebird 5.7 well my brothers 74 5.7 Firebird would eat me up untill I put a different cam, lifters and 4 barrel carb oh I used the stock heads it had. Hey guys I have a set of 15 heads with exhaust manifolds someday I would want to built a engine for a 74 GTO I would love to get my hands on.
11-03-2012 03:28 PM
GMCTRUCKS wallaceracing.com has tons of good info.

Back in high school I had a 1970 GTO boy could it move.

I wonder if a Poncho engine could fit in a 93 F/S GMC truck and how much trouble it would be? I have a set of 1968 15 casting number heads that have never been touched they were off a big Catalina.

My dream would be to have a 400 in a 69 Firebird.
11-03-2012 12:49 PM
MouseFink
Quote:
Originally Posted by E.Furgal View Post
I'm a pontiac guy.. on a bowtie budget..

they didn't have what they have for pontiac when I defected..
forged rods where huge money.. alum heads unheard of, unless you had deep pockets..
A 389/400 Pontiac is under-cammed from the factory. I had a new 1969 Firebird 400, 335 HP, 4-speed, 3.36:1 cogs. When I purchased the car in 1970, it had 4,000 miles on the odometer. I had the Firebird for 6 months and 6,000 miles and blew the clutch, rear end and bent the drive shaft.

A Pontiac Representative from the Dallas Zone Office came 200 miles to my home town and agreed to replaced the rear end and drive shaft under the 50,000 mile drive line warranty. He told me to get a new drive shaft out of a Firebird that was siting on the new car sales lot and install it. I bought a Schiefer Rev-Loc clutch and pressure plate at J.C. Penney. What is a miracle, he knew I had been drag racing the car with 11" Goodyear wrinkle wall slicks!

The dealership installed a 4.33:1 4-pinion Saf-T-Track because the open 10-bolt 2-pinion differentials were too weak for drag racing with good bite. The 4.33:1 would cause the stock hydraulic camshaft in the 400 CI engine to run out of breath at 4,000 RPM , just like a rev limiter.

I re-built the OE #48 heads, roller rocker arms, BB Chevy valve springs, Crane ZIP-510 solid flat tappet camshaft, and 1965 Corvette edge orifice restricted lifters. That woke that engine UP!!!! I raced at Dallas International Motor Speedway in Lewisville Texas, turning 13.80 -14.0 ET with 1969 Firebird HO exhaust manifolds and chambered exhaust. In 1970, at DIMS, I was beaten in the first round of D/S by a 1969 American Motors 390 CI AMX, with a mid-13 ET.

I still have the Pontiac Crane ZIP-510 solid lifter camshaft:
Single pattern, solid flat tappet
.534" valve lift w/1.5 rockers
310 deg. duration @ .004" lift.
254 deg. duration @ .050" lift
84 deg. overlap
.028" I - .032" E lash
108 deg. LSA
102 deg. LCA (5 deg. advanced)
11-03-2012 11:31 AM
chevy302builder18
Quote:
Originally Posted by LATECH View Post
Looks like the OP got scared off. Too bad, we could handle a few more pontiac fans around here. We also need a couple good Mopar guys and some ford guys. Everyone is such the fan of the bowtie, which is fine, but variety is the spice of life, even in cars.
Im considering finding a 351 ford engine and camming it up. the problem is, how to find the older ford trucks.
11-02-2012 08:25 PM
69 widetrack
Quote:
Originally Posted by LATECH View Post
I love Pontiacs. They are awesome.
Lots of good stuff available for pontiacs nowadays.
I have a 350 in my 64 now.
Have a 389 punched to 400 that will be completed in a few more months.
I also have a 400 that is all stock, just for a spare.
I also have a 428 from a 68 bonneville that needs a complete rebuild, not because it is worn out, just from setting so long

Contrary to what some of the posts here say....375 horses on pump gas is easy with a pontiac 400.Without breaking the bank.
Knowing what to do is key.
Waiting for the OP to come back so as to help him out.


I agree...your 428's got the 375 HP and more with just a diligent rebuild, cam, headers and intake (some where factory rated at that). I've built a few with great results.
11-02-2012 06:13 PM
LATECH I love Pontiacs. They are awesome.
Lots of good stuff available for pontiacs nowadays.
I have a 350 in my 64 now.
Have a 389 punched to 400 that will be completed in a few more months.
I also have a 400 that is all stock, just for a spare.
I also have a 428 from a 68 bonneville that needs a complete rebuild, not because it is worn out, just from setting so long

Contrary to what some of the posts here say....375 horses on pump gas is easy with a pontiac 400.Without breaking the bank.
Knowing what to do is key.
Waiting for the OP to come back so as to help him out.
11-02-2012 06:03 PM
E.Furgal
Quote:
Originally Posted by LATECH View Post
Looks like the OP got scared off. Too bad, we could handle a few more pontiac fans around here. We also need a couple good Mopar guys and some ford guys. Everyone is such the fan of the bowtie, which is fine, but variety is the spice of life, even in cars.
I'm a pontiac guy.. on a bowtie budget..

they didn't have what they have for pontiac when I defected..
forged rods where huge money.. alum heads unheard of, unless you had deep pockets..
11-02-2012 05:25 PM
hcompton
Quote:
Originally Posted by LATECH View Post
Looks like the OP got scared off. Too bad, we could handle a few more pontiac fans around here. We also need a couple good Mopar guys and some ford guys. Everyone is such the fan of the bowtie, which is fine, but variety is the spice of life, even in cars.
I love ponchos but they cost me too much fun money. the cars are great i loved the 455 ho one of gm's classics. Find me a cheap machinest or good block i will put one in my vette just to drive the chevy guys nuts. But got to say the bowties go 500 hp with almost no effort. An LT or LS is even easier. poncho will cost a lot more. But can make alot more almost as easy. If your going to 800 hp poncho is good choice as all blocks will need lots of work and expensive parts. Offsets the cheap cost fo the chevy engine.

Hopefully the O/P is just reading Butlers website. His rotating assembly page requires a few minutes alone time.
11-02-2012 04:50 PM
LATECH Looks like the OP got scared off. Too bad, we could handle a few more pontiac fans around here. We also need a couple good Mopar guys and some ford guys. Everyone is such the fan of the bowtie, which is fine, but variety is the spice of life, even in cars.
11-02-2012 02:22 PM
cobalt327
Quote:
Originally Posted by woj's72lemans View Post
okay so i just bought a 76 pontiac 400 engine that i am aiming to build up for power that will eventually be put into my 72 lemans. now as far as thi motor i heard it is a slug but can be built up. i am looking to bore it .30 over, cam it, headers, edelbrock performer or air gap manifod, and i am just unsure of the ebst way to achieve my goal. please help me ith any information, tips, advice, or part suggestions thank you
A Pontiac 400 can be made into a very strong running engine. If you have the desire and money, you can put a 455 stroke crank into the 400 block (takes a crank w/400 sized main journals) for even more torque. Heed what was said above about which block to avoid if building a 400 into a "455".

But even at 406 ci (400 w/a 0.030" over bore), a Pontiac can shine. My way of building it would use basically a stock crank, forged rods, cast pistons, and casting 12, 13, 16, 62, 670, or similar heads or if the budget allowed, aluminum Edelbrock or KRE heads. An engine built w/these parts and a streetable cam could make an easy 450-500 hp and as much torque, w/enough vacuum for power brakes and an idle that wouldn't shake the fenders off the car.

Arm yourself w/info if you plan on getting into Pontiac engines.
Pontiac engines
Pontiac info and sites
11-02-2012 09:26 AM
E.Furgal Quick Tech Video: How to Degree Your COMP CamsŪ Camshaft - YouTube
"> Quick Tech Video: How to Degree Your COMP CamsŪ Camshaft - YouTube
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11-02-2012 09:07 AM
hcompton Chevy is much cheaper. You can make twice as much power with chevy for the same money. I love ponchos but they cost too much money to build. They do make massive torque nothing will move a big car like a big cube poncho.

But that being said dont build it buy it. Butler is the master and his engines are built right and cheaper than you can do it yourself. A lot cheaper.

Butler Performance - Specializing in Pontiac Engines Heads and Performance Parts
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