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Help my doggy 383 #680155 04/25/10 08:30 PM 04/25/10 08:30 PM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	Dont have all the specs but i bought this motor used about 6 years ago. It was rebuilt and runs great,but just feels underpowered. I have had it in my roadrunner for about 3 years. Its a 383, SRP pistons?, mopar hydraulic purple shaft unknown lift/duration, 906 heads,eddy perf intake,Bigs 780 vac carb, headers. msd ignition,timing at 38 total. Its an auto,2800 converter,4.11 gear. Car runs great, besides it feeling underpowered. it doesnt have the pull that puts you back in the seat. I just got done building a smog 440 with the a summit cam it it will destory this mild 383. Is this just the nature of a mild 383 with (im guessing) low compression? Anything you guys reccomend doing/checking? thanks!

Re: Help my doggy 383 [Re: 440challenger] #680156 04/25/10 09:02 PM 04/25/10 09:02 PM
Joined: Feb 2003 Posts: 10,218 Someplace you aren't S SomeCarGuy I Live Here
SomeCarGuy I Live Here S Joined: Feb 2003 Posts: 10,218 Someplace you aren't	If the engien really is runnign OK, then there is little you can do short of putting in a bigger cam and/or aftermarket heads. CR might be a bit low though for aluminum heads. I would say look at things to lighten up the car, it will make it easier to get moving and might even help you out a bunch if you have manual steering. I know it sure made my 69 RR MUCH easier to live with when I was albe to cut some wieght with aluminum WP and housing, alng with a mini starter and ditching my iron intake. Aluminum master is next when the time comes. Short of that, not much you can do. My RR had more grunt with the 440, but the 383 is fine for my use. Just will never have the pop the big engine did. Of course I get better MPG now... I want my fair share

Re: Help my doggy 383 [Re: 440challenger] #680157 04/25/10 09:08 PM 04/25/10 09:08 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Anything you guys reccomend doing/checking? thanks! Get a baseline on what you have now: compression test/leakdown test/idle vacuum/initial timing/slot curve/mixture. I'd advance the cam 4 deg for a start to effect some gain that you can feel keeping in mind that it'll decrease the PV clearance on either the intake or the ex valves (not sure which). live every 24 hour block of time like it's your last day on earth

Re: Help my doggy 383 [Re: SomeCarGuy] #680158 04/25/10 09:09 PM 04/25/10 09:09 PM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	I have alum master w/ maunual brakes. maunual steering. Alum rad. It cruizes good, Just it not fun to drive without that grunt. I dont know if im used to driving my challenger (low 11 sec street car) or if i can get more out of this 383 combo. Im going to check my inital timing tommrow and see where im at. I found a video on you tube that kind of shows how my motor acts. its not as slow as the one on youtube but it resembles the same traits as how it takes for ever to wind out and doesnt go anywhere http://www.youtube.com/watch?v=5g6M9daFPh4

Re: Help my doggy 383 [Re: 440challenger] #680159 04/25/10 09:16 PM 04/25/10 09:16 PM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	I was thinking about advancing the cam. I see mopar preformance makes a bushing kit. How does that work on a big block?I have used the woodruff keys before but not a bushing.

Re: Help my doggy 383 [Re: RapidRobert] #680160 04/25/10 09:21 PM 04/25/10 09:21 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Quote: Quote: Anything you guys reccomend doing/checking? thanks! Get a baseline on what you have now: compression test/leakdown test/idle vacuum/initial timing/slot curve/mixture. I'd advance the cam 4 deg for a start to effect some gain that you can feel keeping in mind that it'll decrease the PV clearance on either the intake or the ex valves (not sure which). at least 4 deg on a purple shaft maybe 6 will really wake it up.

Re: Help my doggy 383 [Re: Dodgem] #680161 04/25/10 09:37 PM 04/25/10 09:37 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars top fuel
Dougsmopars top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	Them cars would put you back in the seat bone stock. If yours is doggie i'd look into the combo and find whats not matching up. Check cam timing. I've seen people install them 4 degree retarded car was a stone dog. 4 degree advance will give a boot to bottom end. I don't use offset keys i use timing sets with advance notches. If your gonna pull it apart to degree the cam thats the time to throw a new chain in.

Re: Help my doggy 383 [Re: 440challenger] #680162 04/25/10 09:39 PM 04/25/10 09:39 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I see mopar preformance makes a bushing kit. How does that work on a big block?I have used the woodruff keys before but not a bushing. you wouldn't happen to have some SB offset keys on hand would you . Heres my BB ones. You drill out the locating pin hole so the round BB bushings will fit and pick the one you want/install it and turn it to offset it to make it turn the cam sprocket CW then stake it/epoxy it in place 5947230-offsetSBkeys.jpg (52 downloads) live every 24 hour block of time like it's your last day on earth

Re: Help my doggy 383 [Re: 440challenger] #680163 04/25/10 09:47 PM 04/25/10 09:47 PM
Joined: Oct 2007 Posts: 846 Illinois moparmattkos mopar addict
moparmattkos mopar addict Joined: Oct 2007 Posts: 846 Illinois	Quote: Car runs great, besides it feeling underpowered. it doesnt have the pull that puts you back in the seat. Anything you guys reccomend doing? Hope this helps ,I have enclosed a pic of my last motor that felt underpowered! I just put a small nos kit on it and it woke up quite a bit! 5947247-lotsanazz.jpg (102 downloads) www.sikosracing.net Heads up Drag racing

Re: Help my doggy 383 [Re: moparmattkos] #680164 04/25/10 09:51 PM 04/25/10 09:51 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars top fuel
Dougsmopars top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	WOW!!!! thats a lot of fittings. lol

Re: Help my doggy 383 [Re: Dougsmopars] #680165 04/25/10 10:04 PM 04/25/10 10:04 PM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	LOL! Ok if i get a new timing set which one do you guys reccomend? With an adjustable timing set would i just be able to put the motor on tdc and then set the sprocket to the 4deg advance dot or do i need to get pretty involved and get a degree wheel ?

Re: Help my doggy 383 [Re: 440challenger] #680166 04/25/10 10:07 PM 04/25/10 10:07 PM
Joined: Feb 2003 Posts: 10,218 Someplace you aren't S SomeCarGuy I Live Here
SomeCarGuy I Live Here S Joined: Feb 2003 Posts: 10,218 Someplace you aren't	I used to run only Comp Cams chains, now I don;t know if I would use them based on the problems I see posted here with all of their current offerings I had a Roll Master set a couple of years ago that was really tight. Really tight. I would think it would hold up well. Sold the engien, so??? I want my fair share

Re: Help my doggy 383 [Re: 440challenger] #680167 04/25/10 10:08 PM 04/25/10 10:08 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: LOL! Ok if i get a new timing set which one do you guys reccomend? With an adjustable timing set would i just be able to put the motor on tdc and then set the sprocket to the 4deg advance dot or do i need to get pretty involved and get a degree wheel ? both, cant assume ANY part is correct live every 24 hour block of time like it's your last day on earth

Re: Help my doggy 383 [Re: RapidRobert] #680168 04/25/10 10:23 PM 04/25/10 10:23 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars top fuel
Dougsmopars top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	I use the Summit true roller chain and gear set. Yup TDC drop it in on the 4 degree advance notch. Car runs super. Now if this were a big dollar Hemi roller motor or a motor for an all out race car i'd go the degree wheel root. For a street car dot to dot is fine. Repair shops have been replacing timing chains for 50 years just doing dot to dot. Yes it may in reality be 1 degree either way but runs fine.

Re: Help my doggy 383 [Re: 440challenger] #680169 04/25/10 10:53 PM 04/25/10 10:53 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	I'll guess it's you convert/cam combo. Purple shafts cams need some stall. swap the cam on the converter [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Help my doggy 383 [Re: Mr.Yuck] #680170 04/26/10 08:40 AM 04/26/10 08:40 AM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	Heres what i found. http://www.summitracing.com/parts/SUM-G6604-B/ Are most the hydraulic purple shafts 1 bolt or 3 bolt or could they be either? I'd like to order the parts before i rip everything apart.

Re: Help my doggy 383 [Re: 440challenger] #680171 04/26/10 08:55 AM 04/26/10 08:55 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	most of them are one bolt! you should look at one of these http://www.summitracing.com/parts/SUM-G1056/ You would need one solid lifter too and a solid pushrod is nice to run up to the dial indicator one of these is real nice http://chucker54.stores.yahoo.net/crtusowidewh.html summit http://www.summitracing.com/parts/CCA-4799/ in use nice the degree whee goes right in it I did put a couple extra set screws in as you use the small keyway and the set screw is hard to get at 5947683-Cranksproket5.JPG (120 downloads)

Re: Help my doggy 383 [Re: Dodgem] #680172 04/26/10 08:57 AM 04/26/10 08:57 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	another 5947685-Cranksproket1.JPG (117 downloads) Last edited by Dodgem; 04/26/10 08:58 AM.

Re: Help my doggy 383 [Re: Dodgem] #680173 04/26/10 08:59 AM 04/26/10 08:59 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	back 5947688-Cranksproket2.JPG (117 downloads)

Re: Help my doggy 383 [Re: Dodgem] #680174 04/26/10 08:59 AM 04/26/10 08:59 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	alone on crank 5947689-Cranksproket3.JPG (121 downloads)

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