CRG Discussion Forum
Camaro Research Group Discussion => Originality => Topic started by: chris69ssx11 on October 14, 2013, 03:45:50 AM
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Hi,
We purchased a 1969 Camaro off of eBay about two months ago... from all indications it appears to be a SS after reviewing the info on CRC?
Here's the specs, vin number and cowl tag info... is this a true SS? any help or insight would be appreciated... thanks.
Specs...
350 small block, M-21 Muncie 4-speed, 12 bolt posi, multileaf springs, power front disc with rear drum brakes, power steering, center console with factory gauges, in dash 7k tachometer w/55k RPM red line, 2" cowl induction hood, dual fuel lines (primary with vapor return).
Note: The motor has been replaced with a zz4 crate engine with aluminum angle plug heads... don't know if the original motor was a small block or big block... the car sits a little high in the front so maybe the front coils were to support a big block?
Vin number... 124379N598xxx
Cowl tag info... ST 69 12437 NOR259593BDY
TR 723 59 59 PNT
02B X11
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Might be an ss350 but with x11 cant be a big block.
Read about x codes here http://www.camaros.org/numbers.shtml#XnnCodes
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Did you get any documentation with the car? (p.o.p., original invoice?)
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If you don't have any origianl paperwork for the car, get the partial VIN stamping off the transmssion and see if matches the last 6 digits of the VIN of the car. You might post a picture of the stamp so the experts can confirm whether or not is an origianl stamp, or restamped. If it matches your car, is an origiinal stamp, and is a Muncie, it sounds like it could be an SS.
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1 or 2 fuel lines?
trans code?
axle code?
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M21's didn't come in small block SS's, sure its not just an M20?
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reinforcement plate for dual exhaust on rear driver side frame rail (in wheel well) ?????
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Mark,
What kind of 4 Speeds came in SS cars?
VT
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Small blocks got M20's, big blocks and Z28's got M20, M21, M22 depending on axle ratios. and engine combintations.
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Mark,
What kind of 4 Speeds came in SS cars?
VT
From http://www.camaros.org/trans.shtml#4speed:
The wide-ratio Muncie M20 was available with any of the high-performance engines, except the L78 and Z28 in 67 only came with the M21. The M20 was the only 4-speed available with the SS350 and the SS396/325 hp (L35) engines.
The close-ratio M21 was available only with the SS396/350 hp (L34) engine and the solid lifter engines (Z28, L78, and COPO).
The heavy-duty M22 was limited to just the solid-lifter engines, starting in Camaros in 1968.
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Ok, what was the reasoning behind not having the M20 as an option on those? I was told on another thread that running the M20 actually gave you a lower 1st gear, to low for the big blocks, and they would just spin the tires and not be able to hook coming out of the hole?
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Not following.
> The wide-ratio Muncie M20 was available with any of the high-performance engines (except in 67)
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ok I get it, why was the M21 only available with specific combos then?
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ok I get it, why was the M21 only available with specific combos then?
It had to do with rear axle ratio and an engine's useable RPM range.
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Close-ratio is better when you want to be in the power band of the engine when you shift 3-4.
More important when racing, esp road-racing.
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That makes sense, I just didn't think there was a significant difference between the two transmissions. I know the gearing is different, just wasn't night and day for me when I have driven both. I understand what you are saying though when shifting you want one gear right on top of the other to stay in the power band.
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Does the 2 Fuel line rule apply to also 7-8 ss's ?
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Does the 2 Fuel line rule apply to also 7-8 ss's ?
No.
Paul
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What does 68 have Paul?
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It was my understanding, and correct me if I'm wrong, that all the solid lifter cars (L78, Z/28, COPO), received a single 3/8" fuel line and the other small and big block cars had two 5/16" lines. One fuel and 1 return.
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What does 68 have Paul?
All 68 Camaros had a single fuel line.
Paul
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I always thought or understood if it had a 4bl q-jet it had 2
Lines. L48s and BB. All only in the SS's. ??
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I always thought or understood if it had a 4bl q-jet it had 2
Lines. L48s and BB. All only in the SS's. ??
Not in '68, single fuel line for all engines.
Paul
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Sorry, I was referring to 69's. ::)
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It was my understanding, and correct me if I'm wrong, that all the solid lifter cars (L78, Z/28, COPO), received a single 3/8" fuel line and the other small and big block cars had two 5/16" lines. One fuel and 1 return.
Sorry, I was referring to 69's. ::)
1969 only: All V8 cars received a single 3/8in fuel lines 6 cyl= 5/16in.single . All Q-jet equipped cars LM1, L48, L35, L34, had an extra 1/4 in return line
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Sorry, I was referring to 69's. ::)
Yes, in '69 all engines equipped with QuadraJet carburetors had two fuel lines.
Paul
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I heard that the 4bl Q-jet had a perking problem that this helped to correct.
The needle/set/float could not hold the pressure and would flood or overfill
The vent relieved the pressures especially when hot.
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It was my understanding, and correct me if I'm wrong, that all the solid lifter cars (L78, Z/28, COPO), received a single 3/8" fuel line and the other small and big block cars had two 5/16" lines. One fuel and 1 return.
Sorry, I was referring to 69's. ::)
1969 only: All V8 cars received a single 3/8in fuel lines 6 cyl= 5/16in.single . All Q-jet equipped cars LM1, L48, L35, L34, had an extra 1/4 in return line
OK, thanks appreciate the information. I learn something new here everyday!
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I heard that the 4bl Q-jet had a perking problem that this helped to correct.
The needle/set/float could not hold the pressure and would flood or overfill
The vent relieved the pressures especially when hot.
Here's JohnZ's explanation...
"Most Q-Jet applications use the fuel return line from the filter to ensure that there is no fuel pressure to the carb once the engine is shut off. Q-Jets depend on heavy fuel flow to keep the bowl full, as there's only one needle and seat feeding both the primaries and secondaries; they use a single large (.110"-.135") needle and seat, and with that much valve surface, it's hard for the float to keep the needle closed when fuel pressure between the pump and the carb rises due to underhood heat-soak after shutdown. Another issue to look for is if you use a windowed needle and seat like the stock GM one on the higher-performance Q-Jets, you should have the fuel filter with the check valve to prevent the fuel level from dropping in the bowl after shutdown; the "windows" are below normal fuel level, and as the fuel level drops and pressure rises as fuel evaporates, the needle and seat opens, and the fuel back-flows through the "window" and out through the return line. Then you have to crank and crank when you start it until the fuel level comes back up."
Paul