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This SE Now Belongs to my 18 year old daughter now LOL

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g3chevy / Mr Pontiac
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This SE Now Belongs to my 18 year old daughter now LOL  - Page 14 Empty Re: This SE Now Belongs to my 18 year old daughter now LOL

Post by Limey SE Tue Feb 23, 2021 6:14 pm

Remember Guys this was From this Behemouth in 1987 I added the 781 Heads casting is a 73 Casting date




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___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
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Post by g3chevy / Mr Pontiac Tue Feb 23, 2021 10:11 pm

Well it looks like my factory heads from my 75 El Camino are the small port heads. Guess it would be pointless to use my RPM Performer intake with this motor???

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Post by REVINKEVIN / Mr. 600+HP Tue Feb 23, 2021 10:34 pm

That second picture speaks volumes about the port differential.
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Post by Limey SE Tue Feb 23, 2021 10:43 pm

Could them 236 heads been switched over before you Bought El Camino ?

Them are what were on my 1987 Mark IV 454 from the RV is why I ask

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Post by g3chevy / Mr Pontiac Tue Feb 23, 2021 11:02 pm

Limey SE wrote:Could them 236 heads been switched over before you Bought El Camino ?

Them are what were on my 1987 Mark IV 454 from the RV is why I ask

No, these are the original heads. The engine was untouched when I tore it down. Still had the original factory steel shim head gaskets and my machine shop confirmed that all the measurements (bore, crank, rods) were standard size. The cast mark indicates "74" which would be correct for a 75 engine. Here's a pic of the casting marks.

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Post by bracketchev1221 Wed Feb 24, 2021 8:00 am

I would still put the intake on. It’s no worse than the rectangle port intake on and oval port head.
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Post by Iggy Wed Feb 24, 2021 8:40 am

The 236 castings are the best flowing of the Peanut Port heads, the runner size is 209cc where the typical Peanut Port is 195cc. In comparison the Vortec 454 head is 235cc and the 781/049 are 256cc - the 781/049 are almost identical, the 781 has a slightly better intake port and the 049 has a slightly better exhaust port.

The 236 would be an excellent head on a mild 396/402, they are not bad on a mild 454 but give up about 1500 RPM sooner than a stock 781/049. By adding 2.19/1.88 valves to a 781/049 you pick up 50 HP, and can get another 50 HP by blending and mild cleanup porting!
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Post by Limey SE Wed Feb 24, 2021 9:32 am

Keep filling my brain Guys I need this !!

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Post by g3chevy / Mr Pontiac Wed Feb 24, 2021 10:19 am

Yes, great info guys!
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Post by bracketchev1221 Wed Feb 24, 2021 10:21 am

Iggy wrote:The 236 castings are the best flowing of the Peanut Port heads, the runner size is 209cc where the typical Peanut Port is 195cc.  In comparison the Vortec 454 head is 235cc and the 781/049 are 256cc - the 781/049 are almost identical, the 781 has a slightly better intake port and the 049 has a slightly better exhaust port.

The 236 would be an excellent head on a mild 396/402, they are not bad on a mild 454 but give up about 1500 RPM sooner than a stock 781/049.  By adding 2.19/1.88 valves to a 781/049 you pick up 50 HP, and can get another 50 HP by blending and mild cleanup porting!

I wouldn't waste the money on changing the exhaust valve on these heads. I ran 2.35/1.88 valves on my 1000 hp 565. If it can flow enough on a 7500 rpm engine, a 1.72 can flow enough on a street engine. The exhaust is under high pressure so the gases WANT to get out of the valve. I have run the 781 heads on a .060 over 396(408) with 2.19/1.88 valves because I had them out of my old race heads and made 500 hp at 6500 rpm with them. This was with a small flat tappet cam of .574/.588 lift.
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Post by Limey SE Wed Feb 24, 2021 10:56 am

781 is what I have on my 454 now and went with the SUM1031 cam 502/501


Basic Operating RPM Range:1,700-5,200
Intake Duration at 050 inch Lift:218
Exhaust Duration at 050 inch Lift:228
Duration at 050 inch Lift:218 int./228 exh.
Advertised Intake Duration:277
Advertised Exhaust Duration:287
Advertised Duration:277 int./287 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.502 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.501 in.
Valve Lift with Factory Rocker Arm Ratio:0.502 int./0.501 exh.
Lobe Separation (degrees):114


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Post by bracketchev1221 Wed Feb 24, 2021 5:10 pm

It’ll be a good engine to 5500.
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Post by Limey SE Wed Feb 24, 2021 5:27 pm

bracketchev1221 wrote:It’ll be a good engine to 5500.  

AKA Street driver LOL

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Post by Iggy Wed Feb 24, 2021 5:59 pm

Consider the stock 454 cam has 193* intake duration and 203* exhaust duration (@ .050") the Summit 1301 is a big step up. Stock cam with Peanut Port heads only makes noise above 3500 RPM - torque is long gone. The Summit 1301 is an RV cam meant to make torque, not high end HP, your setup should yield close to 400 HP and 500 lb/ft of torque - tires will scream for mercy!
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Post by Limey SE Wed Feb 24, 2021 8:27 pm

THAT SOUNDS LIKE A PLAN TO ME

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Post by Limey SE Tue Mar 09, 2021 12:12 am

Well I have finally decided on the scoop to add on I have a glass hood I am bonding it to its a pin on hood BUT gonna use Camaro 3rd gen hood supports if it Holds a steel Camaro hood it will have no issues with a fiberglass Hood.

Also the glass hood has no rear Cowl vents on it, So the scoop will get all the Air from the G SPOT of the windshield, Also Have to get the Other Cragar Style wheels mounted I needed rotors anyways why I wasn't worried about snow being packed around a bare rotor


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___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
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Post by Limey SE Tue Mar 09, 2021 12:28 am

Corvette Stinger style hood my friend in PA put one on an Impala and I knew this had to be the scoop for the SE Not to tall not to short and will be going on my fiberglass hood

I DESPERATELY NEED A NON ORNAMENT HEADER PANEL NOW PLEASE HELP ... I am loosing the Ornament as it doesn't fit well with the scoop

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Post by Joe73 Tue Mar 09, 2021 11:18 am

Maybe either weld up the ornament hole or fiberglass it closed when you do the hood. Very easy.
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Post by Limey SE Tue Mar 09, 2021 12:01 pm

Prob what I will do Joe because Looking on Evilbay and Groups people are crazy on these prices for one ...... Starting at $100 and evilbay is topping the scale at $275 for a NOS its just a piece of short metal for gosh sake LMAO

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1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
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Post by Joe73 Tue Mar 09, 2021 5:23 pm

Cool
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Post by Limey SE Thu Apr 01, 2021 10:59 pm

FELT GOOD TO WORK ON IT FOR SURE

Well More progress is Progress, Only took 4 hours With My portable Oxygen to do One side Between hunting tools down from Shed and tool box ( I need organization in my tools LOL )
Any who seals, bearings, rotor on one side is done Tomorrow is outer side and also installed Gorilla Locking Lugs on the wheels
Man does it feel good to be able to work on this Vehicle and Thankful I still Can !!!


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___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
Limey SE
Limey SE
Management
Management

Street Cred : 97

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Post by Limey SE Sun Apr 04, 2021 1:23 am

Well Felt good Enough to Finish Passenger Side Seals Bearings Rotor today Slow and steady wins the race is what they say... Any thank you for the Continued Support from y'all means Alot.

I did a switchup on the Lug Nuts though I found some Black Gorilla Lugnuts Locally for 25 bucks to me from Chicago area so Gives a little different but Cool look I think


My 11 year Old Elizabeth even helped me Today she thought that was the cats Meow even Helped me Put on Sisters Turbines (insert sad face here) Yes she won the battle of the wheels

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___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
Limey SE
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Management
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Post by Limey SE Sun Apr 18, 2021 10:47 pm

Well finally after 3.5 years of well NOT being able to work on car Today I was able to without oxygen for 3 hours to get the Chevelle SE fired up and move it under her own power what a good feeling that was to hear and see it run after 3.5 years 305 sounds pretty good ya ask me


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This SE Now Belongs to my 18 year old daughter now LOL  - Page 14 20210418







Last edited by Limey SE on Sun Apr 18, 2021 11:09 pm; edited 1 time in total (Reason for editing : Added video)

___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
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Post by Limey SE Sat May 15, 2021 7:39 pm

Now if I can stay Healthy enough to finish the 454 up and Install it after the June 5th Car show here I have wheels tires to run at track NOT GONNA break any land speed records for sure BUT 16 seconds will be fun LMAO LOL

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___________________________________________
1977 Chevelle SE x2
One Mild original
one Wild NON original
Anthony
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Post by REVINKEVIN / Mr. 600+HP Sat May 15, 2021 7:55 pm

As of right now your car is faster than mine. Have fun at the show.
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