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too much cam????? kinda long-please help!!!!!
#723406
06/13/10 08:27 PM
06/13/10 08:27 PM
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Joined: Apr 2005
Posts: 281
las vegas
70challenger408
OP
enthusiast
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OP
enthusiast
Joined: Apr 2005
Posts: 281
las vegas
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need some opinions guys. During the winter, I lost 2 cam lobes on my racer brown hydraulic cam(242@.050 543 int/510 ex). decided to rebuild with a solid roller cam this time. I called COMP CAMS, and they sold me grind 20-740-9(248/254@050, 616 int/582 ex 110 LSA. I also changed the intake to a victor 340, and had the dynamic converter reworked to 4200 stall(was 3800). long story short, took it to the track, and lost 1 full second. best with old motor was 12.7 @105mph. so, have been told too much cam is the fault. sorry, car is 1970 challenger, 3800# 408Ci, oob indybrock heads, 10.7cr, 727 and 3.55 rear gears. help me oput here guys. 
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723407
06/13/10 08:31 PM
06/13/10 08:31 PM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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you have to start with the basic..
was the cam degreed? advanced?
timing set correctly?
Last edited by 70AARcuda; 06/13/10 08:32 PM.
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723408
06/13/10 08:34 PM
06/13/10 08:34 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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i had to reread that 2 x full sec?? hard to believe racer brown really good stuff thats not the total reason has to be something going on not enough info say fuel related best guess right now 
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723410
06/13/10 08:39 PM
06/13/10 08:39 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Its not really that big... but with the gear you have it might be a touch slow reving... give us the whole low down on your engine... do your heads have any port work done on them... need info... also like was asked.. did you degree it 
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Re: too much cam????? kinda long-please help!!!!!
[Re: forphorty]
#723412
06/13/10 08:41 PM
06/13/10 08:41 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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Re: too much cam????? kinda long-please help!!!!!
[Re: S/ST 3040]
#723418
06/13/10 08:59 PM
06/13/10 08:59 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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unless it was retarded bad those wouldn t do it unless they were all bad??@@ something hes not telling  
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723419
06/13/10 09:01 PM
06/13/10 09:01 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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there ya go  now theres some really good info mmmm my first was ? ? 
Last edited by dennismopar73; 06/13/10 09:02 PM.
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723420
06/13/10 09:01 PM
06/13/10 09:01 PM
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Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
dusturbd340W5
master
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master
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
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1st problem really need to degree the cam.
The cam that is in my motor right now when I put it in strait up and then checked it with a degree wheel it was off 6 degrees.
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723423
06/13/10 09:09 PM
06/13/10 09:09 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
ok mr p-body, the engine is a 408 10.7:1CR
heads are oob IndyBrock(reworked like TA heads with pushrods moved over) no porting done. has 1.6 roller rockers on intake, and 1.5 exhaust. intake is a port matched victor 340 topped with BG 750 mighty demon. ignition is a MSD 6a firing a stock distibutor(recurved by don gould at 4secondsflat.com. Initial timing at 20deg advance, with 34 total at 3000rpm. still have stock jetting in carb. fuelpump is a holley hp150 billet pump. I think the pump may be a problem(flow tested after the regulator, an d found 31 secounds to pump 2 gallons.) ohh-cam was not degee'd-did not have the means at the time-installed strait up. did notice that the plugs were white, and the color on the ground strap started close to the threads---too lean?????
Ok next ... give us the time slip numbers(all of them)
need to find out where its bad at.... you didnt degree
it in so that could be a MAJOR problem... you really
dont know where its at... and its lean from what you
said.... you have plenty of supply with the 2 gal
at 31 sec... also did you flash the converter or is
that the number it was suppose to be... if your cam
is way off you wont make the torque to work the
converter
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Re: too much cam????? kinda long-please help!!!!!
[Re: dennismopar73]
#723424
06/13/10 09:11 PM
06/13/10 09:11 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
straight up will run!!
wont kill a full sec
Straight up dont mean nothing... what happens if the
dots are off... is it still straight up.... NOT
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Re: too much cam????? kinda long-please help!!!!!
[Re: 70challenger408]
#723425
06/13/10 09:15 PM
06/13/10 09:15 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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with the combo i see a little tinkering i think you could very well see 11 sec car there?? but i see you drive it alot?? so the 355 is a great gear i ran 391 for years on the street, i wasnt trying to be rude so looks like you have this in hand have a  
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