1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought Home



Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » March 21st, 2015, 10:36 am

grumpyvette wrote:http://providence.craigslist.org/cto/4939093125.html

Brian, I saw this and thought you might want to look it over

What a surprise Grumpy.
Just logged on.
Ok. look now.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » March 21st, 2015, 10:47 am

Kinda neat Time Capsule Grumpy.
I have to pass.
I no longer have $7 k cash put away.
1970 Bird man will like it also.
1975 455 engine has thinner main webs like 1976 455.
General concensious among long time Poncho guys is 500-550 safe HP levels with those blocks.
1970-71 455's like I have, the 3 of them good for 800 HP without Hardblocking.
6H heads used 1975-76 455 had huge volume combustion chambers. 124-128 cc.
7.6:1 static compression raio. Did that so engines would run on 87 octane safe forever.
Killed HP though.
Have a set of those 6H 455 heads. Need to clean up this year.
Smog era Pontiac heads getting hard to find now also.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 16th, 2015, 5:28 pm

I Ultrasonic Cleaned my 1970 RAM AIR 4 "614" Heads today & Crower pushrods, Crower Enduro Stainless Rocker arms & Titanium valves.

Been cleaning all.
Couple of more engines to clean up.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby philly » April 16th, 2015, 11:15 pm

when are you gonna start slappin parts together and making some noise brian?
-phil

There's never enough money to build it right, but there's always enough to build it twice!
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby DorianL » April 17th, 2015, 2:37 am

philly wrote:when are you gonna start slappin parts together and making some noise brian?


X2
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 17th, 2015, 7:41 am

philly wrote:when are you gonna start slappin parts together and making some noise brian?

June - July 2015.

1970 Trans Am & 63 Grand Prix both back & burning rubber street racing.
Couple of side jobs going now. $$$.
Race work should start again for me in Joliet. 5.0 Mustang guys.
EVERYONE HAS TO RACE HELLCATS :mrgreen:
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby NOT A TA » April 17th, 2015, 9:08 am

Only another couple months! Looking forward to seeing it come together.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 19th, 2015, 9:22 am

I found the Canton Remote Oil Filter adapter block for Pontiac V8's Grumpy.
# 22-589. $70.00 Summit Racing.

What is available for Dual Oil Filter remote kits ?
I want Parallel oil flow.
More oil is flowing by the Pontiac V8 oil pump than SBC.
About on par with BBC.
12-13 Gallons per minute stock
18-19 gallons per minute Butler Blueprint Pro.

Or I want Top Fuel Dragster style single Huge large oil filter.
Have lots of free room in T/A Engine bay.
No electronics.
Just the VERTEX AC Output Magneto.

Full Race Grumpy.
Not slow and lose against Hellcats.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 19th, 2015, 2:30 pm

Well this is a Real interesting topic specific with Pontiac V8 engines Grumpy.
Using the stock oil filter adapter with bypass valve,
The oil always bypasses the Filter no matter what filter is used.
At 4,000 Rpms Engine oil is always unfiltered .
Bypass valve Fully open.
Many block off the bypass valve. Myself included.
Use K& N HP 2003.
MANY ARGUMENTS ON THE PONTIAC FORUMS.

THE PONTIAC OIL PUMP IS THAT GOOD.
FLOWS ALOT OF OIL STOCK.
NO STOCK OIL FILTER CAN FLOW ENOUGH .
RESTRICTION SEEN AND BYPASS VALVE IS ALWAYS FULL OPEN ON THE GAS HARD.

SOME HAVE RAN NO OIL FILTER RACING.
WORKS TOO.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 19th, 2015, 2:39 pm

Since the T/A has always been RACE Not going to worry about 5 micron dirt.
Stupid Shit to me.
Want an oil system that can flow 20-30 gallons per minute.
Hold 100-150 psi without failure .
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 19th, 2015, 8:30 pm

Using the Butler Pro Oil pump M54F & M54D, 80psi & 60psi that both flow 18-19 gallons per minute with stock oil filtration and oil filter adapter bypass intact or blocked not a good move my conclusion tonight Grumpy.
No convential off the shelf oil filter exists to keep flowing freely at large volume rates.

Use what has worked for me in the past.
Or plumb custom remote oil filter layout
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby NOT A TA » April 19th, 2015, 8:40 pm

20-30 GPM is a lot of oil!
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 19th, 2015, 8:45 pm

NOT A TA wrote:20-30 GPM is a lot of oil!

The Pontiac V8 oil pump is superior to the SBC.
AT LEAST GOOD AS BBC BLUEPRINT RACE HIGH VOLUME.

WE WERE ALWAYS TOLD BY CHEVY GUYS PONTIAC. IS NO GOOD.
BAD OILING.
OPPOSITE IS TRUE. EXCELLENT .
THE STOCK OIL FILTER IS THE PROBLEM BIRD MAN.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 19th, 2015, 8:48 pm

Figure Remote oil filter layout will cause 2-3 gallon per minute free flow loss.
Oil cooler stacked plate RACE EARLS Another 1-2 gallon per minute less.
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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby 87vette81big » April 20th, 2015, 7:52 am

Image

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Re: 1971 Pontiac GTO 455 RPO L-75 325HP & 455Ft/lbs Brought

Postby NOT A TA » April 20th, 2015, 1:48 pm

I put in a Melling standard pump with a 7 Qt Canton RR pan on my 400 when I put it in the bird and been using standard Wix filter. Thinking about going remote 1 or 2 filter setup because the Hooker Supercomp sidepipe headers I'm putting on will make it harder to get at the filter.
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