Randi came to us with a 400 Pontiac project for his 1968 Firebird. He didn't want to go crazy on the build but he wanted something that would give him performance that is better than original.
With that goal in mind Scott did some custom porting on his heads, upgraded his valve train and went with a Custom COMP cam and lifters and aluminum roller rockers. We maintained his complete original rotating assembly but had to re-balance his crankshaft, it had been poorly balanced sometime in the past and was out by 127 grams on one end and 181 grams on the other. A single plane intake with a 780 Quick Fuel carb got it breathing and the fire is lit with a Flamethrower ignition package. Custom cut and fitted 8mm plug wires are standard equipment here at Sehr. Headman custom coated headers will be added at installation time.
The results were a satisfying 543.5 Hp @ 5500rpm and torque reading of 519.8 @ 5400rpm. Corrected to sea level the numbers are 577 Hp and 551 Tq with nearly 400 lb of torque at 3500rpm.
Pontiac 455 First Dyno Pull Hot Rod Tempest Lunati Voodoo Cam
My Pontiac 455 fresh build. Pro Gram Billet 4 bolt mains, Eagle H Beam
Rods, 6095 Lunati Voodoo Cam Valve Lift .527 INT 548 EXH; Duration 284 INT
292 EXH., Pro Form 950 CFM Carb, 1971 Super Duty Round Port HO "197"
castings #481768; Fully Ported; 2.11/1.77 valves; Milled .055; 103 cc's;
Lazer Valve Springs H-O Racing Enterprises) 1.770-1.785 installed height;
7/16 screw in studs; 11/32 pushrods; Pushrod Guide plate holes elongated
for clearance; 1.65 Harlan Sharp Roller Rockers; ARP head Stud Kit., Doug
Nash Warrior Intake port matched, JE forged pistons, 10.3:1 compression.
500HP 500 Ft pounds of torque. Built by Blackshear Racing, Brookfield, Oh.
Dynoed at Tubs,
Sehr Performance Machine / Ryan's 350 Pontiac
Ryan dropped off his 350 Pontiac long block along with a set of 400 Pontiac
Ram Air cylinder heads, an Edelbrock intake and his Holley carb. He wanted
us to put it together for his '69 Firebird. His engine came to us with
blow-by issues from a broken piston. First off the cylinders had to be
relieved to clear the valves on the Ram Air heads. The heads were milled
to reduce chamber size and valve to block clearance was checked one more
time. All of his parts were inspected and magnafluxed to be sure we were
starting off with serviceable parts and the clearances were brought back to
low side of factory tolerances, a new custom COMP cam and a distributor
curve kit were added along with some other touches, the engine was painted
Pontiac Blue and bolted to our Dyno. Ryan is very happy with
the end results and is looking forward to getting it back in his car and
having some fun with it.
389 Pontiac On Simtester
Watch John Edwards as he describes the Simtesting of a 389 Pontiac GTO
engine at Costa Mesa R&D Automotive Machine. (949) 631-6376 Be sure to
'Click' and SUBSCRIBE.
The First time my 400 Big Block got started.
Pontiac 400 break in
Number matching engine. Pontiac 400 cid. Break in of camshaft.
Formula 1973 with non stock color ( it supposed to be Burma Brown)
'68 Pontiac Firebird ...Pontiac 400...Built by Proformance Unlimited
http://www.customcrateengines.com/ Live run of a Pontiac 400 engine built
by Proformance Unlimited...engine will be run in a '68 Pontiac Firebird
You can view this engine package along with available upgrades at the
Our staff is available Monday-Friday 8am-5pm to answer any of your engine
Part1 1959 Pontiac 389 resurrection for "The Find" 1956 GMC 250 Dually
I HATE PRE-ROLL ADS! YouTube can't seem to get the code right. I've reset
the defaults to NO PRE-ROLL ADS 3 times now. Sorry for the pre-rolls. I'm
still working on it. Snagged a 1959 Pontiac 389 from an hour or so away.
Pig in a poke, really, but they don't get any easier to find as time goes
on. The 56 needs a heart transplant, and 389 cubes is the biggest direct
bolt-in you can get your hands on! I don't know how many parts there will
be. Just trying to get it edited and uploaded!
Cubes... Gotta have cubes...
Proformance Unlimited Pontiac 400 Motor Dyno Test
Engine package specs:
A seasoned 400 Pontiac block
Bored And Honed With Deck Plate
Mains Have Been Align Honed
Block Has Been Decked
Dura Bond Cam Bearings Installed
Brass Freeze Plug And Oil Galley Kit Installed
Block painted with 3 coats of high temp ceramic engine paint customers
choice of color (have your engine custom painted to match your vehicle for
an additional $300)
A Precision Ground Micro Polished Cast Iron Crankshaft
Clevite P Series Rod And Main Bearing
Eagle I-beam Connecting Rods w/ARP rod bolts
High Performance Pistons (Speed-Pro, Keith Black, SRP, Or Mahle)
Performance Rings Hand Filed To Match Application
New three piece true double roller timing set
Comp Cams Custom Ground High Performance Street Camshaft With A Muscle Car
Set Of Tie-Bar Hydraulic Roller Lifters
Edelbrock Performance Aluminum Cylinder Heads
A Set Of High Performance Valve Springs And Retainers (To Match Camshaft)
7/16 Screw In Studs And Hardened Guide Plates
ARP Head Bolts
Manley Chrome Moly push rods
Scorpion aluminum roller rockers
Engine will be assembled with all new bolts
High volume oil pump and screen
Chrome oil pan
Chrome dip stick and tube
A new valley pan
Professional Products performance balancer
Fel-pro performance gaskets
The complete rotating assembly will be balanced
Edelbrock Performer RPM intake manifold
New chrome thermostat housing
Edelbrock carburetor w/ electric choke
New chrome air cleaner
MSD Pro-Billet distributor
MSD Blaster II coil and bracket
MSD 6AL Ignition Control Box
Auto-Lite spark plugs
Custom fit Taylor 8mm ignition wires (color of choice black, red, blue,
yellow, green, orange no extra charge)
High flow water pump
Chrome valve covers
New chrome breather
Fel-Pro Performance Gaskets
Flex plate (for auto transmission)
Engines are photo documented during the building process so you can see the
quality of parts and workmanship that goes into your engine
Each engine is tested, timing set and carburetor adjusted for optimum
We video tape your live run engine and send you a copy
GTO First Start Up
Having a conversation with Darrel Arvizo, AKA "Slo-Moe", about his sweet
GTO build and NOT getting a straight answer out of him on anything. I'm
sure that engine puts out over 1000 horse power, who's he tryin to kid...
LOL. Anyway, this is what I do know.... The chassis was built by Rob
Lindsay at R.J. Fabrication, engine build by Rock & Roll Engineering and
NHRA Super Stock Indy winner Bruce Fulper, body work done by Tony "Cricket
Fingers" Griffin, C&R Radiator, APS-Racing carb spacer, CCP control arms,
MSD Ignition and a lot of hard work by Slo Moe. Hurry up and Git-R-Done!
HOT ROD TV: New Old Goat
A team of Southern California restoration experts are going to build a
super car? No! The kings of restoration are restoring a 1968 Pontiac GTO
400 to its original stock condition. They are taking this Old Goat and
turning it back into the Gran Turismo Omologato.
Sehr Performance Machine / 229 cid V6 for Costa's Repair Lihue, HI
Our customer called all over to find a shop that would do a Chevy 229 V6
for his 1980 Malibu. He had to go 3800 miles to find a shop that was
We have really enjoyed the relationship that has developed during the
coarse of this build. It's fun to work with someone who gets excited about
what their doing.
With a lot of custom head work, a custom COMP roller camshaft, and some
other trick parts and machine work we were able to develop 474 lbs of
torque and 503 horsepower.
Pontiac Performance Tips from Butler Performance V8TV
http://www.v8tvshow.com - 314-783-8325 - Certain engine builders specialize
in specific brands, and for Pontiac power, Butler Performance is in the
forefront. We visited Butler to get the lowdown on the latest in hi-po
parts for Pontiac V8s and to spec out a motor for project "Splitter."
Here, David Butler takes us through the shop and brings us up to speed on
the latest in Pontiac performance.
Sehr Performance Machine / Marvin's 460 Ford
Marvin brought his engine to us to 'hop it up a bit' but still keep it
legal for class that he pulls in and keep it reliable as well. Starting in
the heads, we boiled them out cleaned and magnafluxed them before shot
blasting. Next was a clean mill just to get things straight. A 5-angle
valve job, fitting the guides and installing new Viton seals were next in
the order of business.
While we were at it we cleaned and magged his block and shot blasted the
rods and block. His mains were out of wack and his crankshaft was bent so
we did a line bore on the mains and fixed him up with a new crankshaft.
Next in line was a clean mill on the deck surfaces and lifter bore grooves.
Every part that went into Marvin's Ford was completely checked and those
that didn't pass muster were replaced with quality new parts. No headers
allowed in Marvin's class so we ran his iron Exhaust.