Author Topic: 135 series mustang intake manifold question  (Read 291 times)

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Offline wsu0702

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135 series mustang intake manifold question
« on: September 14, 2018, 10:35:03 pm »
 Which intake manifold was factory installed on the 135 series mustangs?  The info from the March 1968 Shop Tips list both the aluminum PI and the early cast iron 428CJ (C8OE-A) as "production" intakes.  So which one was it?  https://www.428cobrajet.com/drag-strip-mods

Offline sportyworty

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Re: 135 series mustang intake manifold question
« Reply #1 on: September 14, 2018, 11:32:11 pm »
I do not think there were any A intakes in 1967 so PI for 500 Alex ;D
Thinking early March on A perhaps Feb 68. Sidewinder was popular Drag upgrade
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Offline RoyceP

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Re: 135 series mustang intake manifold question
« Reply #2 on: September 15, 2018, 10:49:57 am »
The 135 cars used the C7AE - F intake, same one used on the '67 - 68 427-4V side oilers and on late 1967 and early 1968 428 PI engines.


Which intake manifold was factory installed on the 135 series mustangs?  The info from the March 1968 Shop Tips list both the aluminum PI and the early cast iron 428CJ (C8OE-A) as "production" intakes.  So which one was it?  https://www.428cobrajet.com/drag-strip-mods
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Offline wsu0702

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Re: 135 series mustang intake manifold question
« Reply #3 on: September 15, 2018, 09:14:56 pm »
Thank you Kerry and Royce.  I love learning the true facts about one of my favorite subjects (CJ Mustangs).

Offline wsu0702

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Re: 135 series mustang intake manifold question
« Reply #4 on: September 16, 2018, 03:46:50 pm »
Another question I have is when was the PI intake allowed by NHRA for the stock class 428's? 

Offline RoyceP

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Re: 135 series mustang intake manifold question
« Reply #5 on: September 17, 2018, 07:38:29 am »
Well it was always allowed on 428CJ's because it predated the availability of the cast iron intake.

Another question I have is when was the PI intake allowed by NHRA for the stock class 428's?
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Offline 161854

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Re: 135 series mustang intake manifold question
« Reply #6 on: September 17, 2018, 10:18:13 am »
   The aluminum intake was ONLY legal in superstock after the Pomona race in '68. NHRA knew there were only 50 "light weights" built and once "production cars" hit the dealers , the 135s were restricted to iron intakes "if" they were run in stock classes.
    Randy
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Offline sportyworty

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Re: 135 series mustang intake manifold question
« Reply #7 on: September 17, 2018, 11:09:13 am »
Now I understand why you're asking these good questions Jeff. Here is a copy of the original NHRA doc clearly illustrating the current PI Aluminum as well as the assigned A series Cast Intake Manifold.

There was a flurry of interest on the PI about 4 yrs back on the FE forum because they were legal for some stock classes. This tells me maybe they were not previously? I sold quite a few with the new uptick in interest and prices but not a racer and never really understood the back story. Perhaps it is related to your question but think you are looking for the original story from the day rather than whatever happened more recently? anyway this should light up the score board and Randy can translate for us :)
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Offline preaction

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Re: 135 series mustang intake manifold question
« Reply #8 on: September 17, 2018, 02:10:10 pm »
That's a very interesting document.
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Offline 161854

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Re: 135 series mustang intake manifold question
« Reply #9 on: September 17, 2018, 02:49:55 pm »
  Yes Kerry is right. Some years back , the aluminum intake was deemed legal. Same for Edelbrock heads. There were SO many modified iron intakes and heads NHRA had no clue as to what WAS legal and what was bogus. Now days the water pump can be aluminum and it can be driven by an electric motor instead of the fan belt. Cams are made to a "lift rule" only and those lifts have been adjusted. The current mid 10 second "stocker" is a FAR cry from the original '68-69 rules 12 second cars. NHRA is more concerned with sponsor/contingency money than the REAL way the cars were built.
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Offline geraldt52

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Re: 135 series mustang intake manifold question
« Reply #10 on: September 17, 2018, 03:55:36 pm »
... The current mid 10 second "stocker" is a FAR cry from the original '68-69 rules 12 second cars...

I think this sometimes gets lost, and people assume that today's racers are faster because they've gotten so much smarter over the years.

"Stock" cars were amazingly stock back in the day, so much so that someone could be reasonably competitive with little more done to the engine than a competition valve job and a set of headers.  There were cars driven in off the street every Saturday night, changed tires and unhooked the headers, and were running within a tenth or two of the "professionals".  I put professionals in quotes, because back then even they had real jobs, and their cars had "names" on the side, not a sponsor's logo.

I think it was a lot better back then, perhaps I'm just old, but it didn't put enough butts in the grandstand seats.  Today's "fans" just want to see cars go really fast and make a lot of noise, not two twelve-second cars running neck to neck.

Offline 161854

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Re: 135 series mustang intake manifold question
« Reply #11 on: September 17, 2018, 05:30:40 pm »
   I agree 100%. Back in the day the cars were as fast as they could be and stay within the rules. IF you take Richie Paulie's car back to STOCK iron CJ heads and intake , back to +.030 max bore cast pistons on nut and bolt rods , STOCK valves , valve springs , Iron water pump driven by a fan belt WITH a fan blade, No Cal Trac bars or $5,000 modified auto trans and it WILL be a high 11 low 12 second car. It takes OVER 600hp to go in the 10's. The "new rules" parts are responsible for the extra 200+ hp he now makes. He has done wonders to go as fast as he does but it not apples to apples with more knowledge applied.
    NHRA professional racing has become entertainment. The stands EMPTY when the nitro cars are done. YET if you go to a ''nostalgia race" the stands are packed. The racing is better and the racers are easier to talk to.
   Randy
68 1/2 CJ FB San Jose white/blue "C" stripe Foulger Ford
 66 GT350 Hertz SFM 6S 477 white/ blue side stripes 1  of 18
3 magazine covers- Car Craft July '77,  Modified Mustangs Feb '11 , and June '14 Mustang Monthly
'78 F350 Oleynik racecar hauler