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#181
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Quote:
Dennis |
#182
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Right now. A gold (?) 1970 Lemans 4 door hardtop at Frank's Pontiac Parts:
https://www.facebook.com/74458142901...type=3&theater Someone please save it.
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1970 Lucerne Blue Firebird Trans Am, deluxe blue interior. Original Ram Air III, M-21, 3.73. Being built as a 4" stroke "434" with SR 614 Ram Air IV heads 1972+ Lucerne Blue 4-door hardtop "what if" T-41 Le Mans Sport GT/Grand Am concepts. Equipped with future 3" journal "455 HO"/"what if" prototype "SD 455". What if GM had continued production of the 1970-72 GM A body somewhere in the southern hemisphere? |
#183
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yeah, I saw that;
It's probably a gonner.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#184
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Might be a faded "Keylime Green Poly". Intriguing color.
Could be of interest for any of the people who have expressed interest in "more door" "GTO" variants, etc.
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1970 Lucerne Blue Firebird Trans Am, deluxe blue interior. Original Ram Air III, M-21, 3.73. Being built as a 4" stroke "434" with SR 614 Ram Air IV heads 1972+ Lucerne Blue 4-door hardtop "what if" T-41 Le Mans Sport GT/Grand Am concepts. Equipped with future 3" journal "455 HO"/"what if" prototype "SD 455". What if GM had continued production of the 1970-72 GM A body somewhere in the southern hemisphere? |
#185
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Finally got the Lemans' engine transplant completed and running well. We had to change back to the 7040264 auto carb from the previous motor as we had some problems with the 7040263. We changed the primary side to 74 jets with 44 metering rods, D hanger and CC secondary rods. It idles at 750 rpm at 12 inches of vacuum with a 041 RAIV copy cam from Bullit cams ground at 112 lcl with regular hydraulic lifters, now drives smoothly without bucking and lean surging.
Now it's the GT-37's turn for attention to make road worthy. Dennis |
#186
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It's been a week already since driving down to Norwalk and the weather couldn't have been better...low to mid 80's and lower humidity than the usual past. The new motor ran cool and got 15.5 mpg average on the trip down & back (driving the back roads through lots of little towns). Even with the RAIV cam and 3.08 rear gears, it had plenty of torque and could pull away easily from 1200 rpm in any gear of the wide ratio M-20 4-speed. The only problem was the brake master cylinder starting to leak and will need a rebuild (original).
The picture is of the cars parked in the town square of Milan, OH just north of the race track. Dennis |
#187
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Cool car! I saw it at Norwalk.
I read through the 10 pages of this post kinda quickly. When you were talking about a 400, 4 brl, 4 spd Lemans were you referring to a 70 model? I have a 72 Lemans that is optioned that way. |
#188
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this car is/was originally a 400-4spd car;
Dennis just increased this car's engine's displacement because he could
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#189
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It was my understanding that the 70 4 door was originally a 350/2, 4 spd car from the first post.
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#190
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oh!?
I guess I forgot this. Whoops, my mistake.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#191
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Quote:
Dennis |
#192
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I forgot to mention that the LeMans averaged 17.5 mpg driving the back roads through the small towns of rural America with the new 462 engine backed with the original M-20 4-speed and 3.08 12-bolt rear end. The engine is a 4.25" stroker 400 block with the SD Performance CNC ported 6x-8 heads (260/210 cfm) 9.6 to 1 compression, RAIV clone cam from Bullit w/1.5 rockers, std. RA exhaust manifolds, std. cast iron 4-bbl intake and a 7040264 Q-jet. It ran great and cool for the 600 mile trip. This was driving very conservatively, btw.
I really think the smaller 3" main cranks less friction really helps efficiency quite a bit. My 455HO formula with 3.42 gears and pure stock only managed 15.2 mpg best...with 14-15 mpg the usual not getting into the secondaries. Dennis |
#193
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great!
I did once just barely exceed 20mpgs (I double checked my calculations); in my car with 3.55:1 gears, but running a bone stock 77-P350 carb, and keeping it to 50mph - to keep the rpm's down.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#194
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That's really good Jonny! Our driving was 55-65 mph between the towns and stop & go in the towns...they all had 2-3 traffic lights and we seemed to catch every red light! I imagine at a steady state of 60 mph, it would do 18-19 mpg...20 would be wishful thinking.
Dennis |
#195
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you had better gearing than me for mileage, but you also had a much more powerful engine... I'd think that even while not under load, your engine would have vastly different fuel requirements than mine.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#196
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True, there is only so much you can expect from a RAIV style cam. It has an LCA of 112 degrees, so a little tighter than the factory cam. It still has plenty of grunt down low, actually more than the 8.5 to 1 455HO in my Formula with the M22 close box, 3.42 rear (7.7616 A-body vs. 7.524 F-body) and the 2801 cam.
Dennis |
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