Mopar guys chime in!!!..70 roadrunner help?? - Team Camaro Tech
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post #1 of 25 (permalink) Old Nov 16th, 09, 04:09 AM Thread Starter
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Mopar guys chime in!!!..70 roadrunner help??

Ok, here is the deal, i got hired buy a guy who lives in my town to check out his car for him.. Here is the low down on the car, it is a 70 roadrunner, 440 six pack with a 4 spd and a 8.3/4 rear probally a 3.42 ish rear posi..he bought this car from nashville, tn two years ago off of ebay and drove it back to hendersonville, nc ..a 600 plus mile trip..the car did fine, a little under powered he said but did good..since he bought the car he has installed msd 6sl set up..its had problems starting back up..and he has replaced the carb set up with a 3 2bbl demon set up which i cant freaking stand??..all the problem is - it is under powered???..--what is initial timing suppose to be at and total timing at??--(7-8 initial and 32 total??)..the carbs seem to be dialed in and responsive..the car starts back up when hot and does run ok and will pull a hill but is 50% under powered??..advice??..the secondaries are working and coming in...my gut instinct on the car is that somebody just dropped in a motor out of a rv and put a cam in it??..the car looks and sounds great and is detailed good but the engine is not original to the car??.(1)i guess the first thing to do is check the timing(2)check the carbs to make sure they are dialed in and the throttle is adjusted ok(3)run the numbers off the block to see what it is...i wonder if someone has the timing at the timing chain 2 degrees back??..this guy has a ton of coin hanging around and he is kinda wanting me to tell him that he needs a moto,r so he can buy a 440 from indy for 8500.00 and dump it in there..he has his normal mopar guys that work on his car, he just wanted an outside honest opinion on his car from somebody that would shoot him straight..i drove up to his house sunday in my 67 chevelle ss!! oh yeah, she was looking good and wasnt under powered(lol)..hahaha..had to rub it in to the mopar guys a little!!

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post #2 of 25 (permalink) Old Nov 16th, 09, 04:54 AM
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Re: Mopar guys chime in!!!..70 roadrunner help??

Put a GM 502 crate motor in it. It will run awesome then... Keep the six pack set up though, would want it to be Bud set up of course...
Dont pick on them with the Chevelle... Hurts their feelings...

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post #3 of 25 (permalink) Old Nov 16th, 09, 06:37 AM
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Re: Mopar guys chime in!!!..70 roadrunner help??

The Road Runner uses a 383 short block and 440 heads and intake as delivered from Chrysler. Camshaft wasn't very big, but a step above stock. A Mopar Perf '509 cam would wake it up, kindda.

One thing Chrysler did was to cast the CID on the side of the block, you might look to make sure its not a 361 CID.
Check the dashboard for broken padding - every fast shift to 3rd has your middle finger smashed.

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post #4 of 25 (permalink) Old Nov 16th, 09, 06:40 AM Thread Starter
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Re: Mopar guys chime in!!!..70 roadrunner help??

this casting says 440 ho or hp on the top side by the dist, flat part of the intake on top of the water pump area??
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post #5 of 25 (permalink) Old Nov 16th, 09, 08:46 AM
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Re: Mopar guys chime in!!!..70 roadrunner help??

Restamp, I bet. Pass side of the block casting numbers shows original CID.

Remind me later this evening and I'll check my 1974 Motors Manual.

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post #6 of 25 (permalink) Old Nov 16th, 09, 09:26 AM Thread Starter
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Re: Mopar guys chime in!!!..70 roadrunner help??

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Restamp, I bet. Pass side of the block casting numbers shows original CID.

Remind me later this evening and I'll check my 1974 Motors Manual.
ok,... thanks!!!!
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post #7 of 25 (permalink) Old Nov 16th, 09, 11:02 AM
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Re: Mopar guys chime in!!!..70 roadrunner help??

Bill....According to my Direct Connection racing manual, the 361-383-400 "B" engines can be identified by the cubic inches stamped on the right side of the block deck adjacent to the distributor.....The 413-426W-440 "RB" engines can be identified by the engine size stamped on a pad at the left front of the engine adjacent to the front tappet rail....The 440 would have block casting number: PN3698828.....The 68-70 383-440 would have a head casting number of: 2843906....A true 440-6 would have a heavy duty forged crank with a specially balanced damper (PN3512017)....Let me know what numbers you find on the block and heads.
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post #8 of 25 (permalink) Old Nov 16th, 09, 11:05 AM Thread Starter
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Re: Mopar guys chime in!!!..70 roadrunner help??

ron, so are the numbers i need on the drivers side down by the pan??..thanks..
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post #9 of 25 (permalink) Old Nov 16th, 09, 11:19 AM
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Re: Mopar guys chime in!!!..70 roadrunner help??

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ron, so are the numbers i need on the drivers side down by the pan??..thanks..

I can't remember exactly where it is....Just look for a 7 digit number.
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post #10 of 25 (permalink) Old Nov 16th, 09, 11:28 AM Thread Starter
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Re: Mopar guys chime in!!!..70 roadrunner help??

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I can't remember exactly where it is....Just look for a 7 digit number.
got it ,im going back over tonite to check it out again!..ill post them when i get them
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post #11 of 25 (permalink) Old Nov 16th, 09, 12:23 PM
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Re: Mopar guys chime in!!!..70 roadrunner help??

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got it ,im going back over tonite to check it out again!..ill post them when i get them

Cool!
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post #12 of 25 (permalink) Old Nov 16th, 09, 04:49 PM
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Re: Mopar guys chime in!!!..70 roadrunner help??

From the book (1974 Motors Manual) Left side rear of block near oil pan flange.
Engines are identified by CID and prefixed by letters PM or PT.

440-3X2, 390 HP, 490 ft/lbs torque,10.5:1 CR,
Need distributor number for point setting, dual point set, and timing, 5į BTDC, 14.2:1 air/fuel ratio.

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post #13 of 25 (permalink) Old Nov 17th, 09, 04:00 AM Thread Starter
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Re: Mopar guys chime in!!!..70 roadrunner help??

thanks Everett, the car has a msd billet dist and a 6 al box..he was sick last night have to try again tonite!!..
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post #14 of 25 (permalink) Old Nov 17th, 09, 04:03 AM
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Re: Mopar guys chime in!!!..70 roadrunner help??

Okay, you're welcome. Hate being sick......
Pictures?

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post #15 of 25 (permalink) Old Nov 17th, 09, 04:22 AM Thread Starter
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Re: Mopar guys chime in!!!..70 roadrunner help??

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Okay, you're welcome. Hate being sick......
Pictures?
ill bring the digital with me..
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