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Re: What went wrong? [Re: Shatar4] #2470010
03/21/18 09:41 PM
03/21/18 09:41 PM
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Howell, Mi
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Originally Posted By Shatar4
Originally Posted By EV2Bird
Wondering what you used for push rods and lifter preload?


Do ya got a vid of this dyno session or of the car running, id think it probably dont sound well when running either.

I do have a video but have no idea how to post it here

https://youtu.be/0TVC1dn6SwI

Re: What went wrong? [Re: Shatar4] #2470014
03/21/18 09:47 PM
03/21/18 09:47 PM
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Romeo MI
MR_P_BODY Offline
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I really think your cam timing is retarted..
check the crank zero mark first.. I wouldnt
pull the engine yet.. pull the timing cover
and check the cam timing again
wave

Re: What went wrong? [Re: Shatar4] #2470015
03/21/18 09:47 PM
03/21/18 09:47 PM
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pittsburghracer Offline
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Very nice car!!!!!!!!!!


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: What went wrong? [Re: MR_P_BODY] #2470019
03/21/18 09:50 PM
03/21/18 09:50 PM
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Howell, Mi
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Originally Posted By MR_P_BODY
I really think your cam timing is retarted..
check the crank zero mark first.. I wouldnt
pull the engine yet.. pull the timing cover
and check the cam timing again
wave

Would that make me lose half the hp? I was thinking cam lobe's or something. To lose that much hp, it has to be affecting all the cylinders.

Re: What went wrong? [Re: pittsburghracer] #2470020
03/21/18 09:50 PM
03/21/18 09:50 PM
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Howell, Mi
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Originally Posted By pittsburghracer
Very nice car!!!!!!!!!!

Thanks

Re: What went wrong? [Re: Shatar4] #2470025
03/21/18 09:53 PM
03/21/18 09:53 PM
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Romeo MI
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Originally Posted By Shatar4
Originally Posted By MR_P_BODY
I really think your cam timing is retarted..
check the crank zero mark first.. I wouldnt
pull the engine yet.. pull the timing cover
and check the cam timing again
wave

Would that make me lose half the hp? I was thinking cam lobe's or something. To lose that much hp, it has to be affecting all the cylinders.


A retarted cam will act just like that.. I check
the cam 3-4 times when I put them in and it'll
be slow reving
wave

Re: What went wrong? [Re: Shatar4] #2470027
03/21/18 09:55 PM
03/21/18 09:55 PM
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baldwinsville new york
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Are you sure it's getting full throttle ?

Re: What went wrong? [Re: a493demon] #2470030
03/21/18 09:58 PM
03/21/18 09:58 PM
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Howell, Mi
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Yes. It gets to around 4600 rpm and drops like a rock

Re: What went wrong? [Re: Shatar4] #2470033
03/21/18 10:01 PM
03/21/18 10:01 PM
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Porter67 Offline
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If you missed it, what are you using for pushrods?

Re: What went wrong? [Re: Shatar4] #2470034
03/21/18 10:02 PM
03/21/18 10:02 PM
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Fredericksburg Va
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plycuda Offline
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check to see if your balancer timing mark is right.

Re: What went wrong? [Re: MR_P_BODY] #2470038
03/21/18 10:04 PM
03/21/18 10:04 PM
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Mt. Vernon, Ohio
dartman366 Offline
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Originally Posted By MR_P_BODY
Originally Posted By Shatar4
Originally Posted By MR_P_BODY
I really think your cam timing is retarted..
check the crank zero mark first.. I wouldnt
pull the engine yet.. pull the timing cover
and check the cam timing again
wave

Would that make me lose half the hp? I was thinking cam lobe's or something. To lose that much hp, it has to be affecting all the cylinders.


A retarted cam will act just like that.. I check
the cam 3-4 times when I put them in and it'll
be slow reving
wave
i have to agree with Mike, sounds like its laboring untill it get's up so then it liven's up after that.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: What went wrong? [Re: Porter67] #2470041
03/21/18 10:10 PM
03/21/18 10:10 PM
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Howell, Mi
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Had them made. 3/8 chromemoly

Re: What went wrong? [Re: Shatar4] #2470053
03/21/18 10:22 PM
03/21/18 10:22 PM
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Howell, Mi
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Here are the dyno sheets. First one is before they changed the jets. Second is what the car sits now.

35B111A6-5F8E-49B4-AD84-D0F3D254978D.jpeg49A0C234-5B82-497C-9630-7C1589ECAB74.jpeg
Re: What went wrong? [Re: Shatar4] #2470064
03/21/18 10:38 PM
03/21/18 10:38 PM
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Romeo MI
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Could you hear the engine surging
wave

Last edited by MR_P_BODY; 03/21/18 10:39 PM.
Re: What went wrong? [Re: MR_P_BODY] #2470075
03/21/18 10:44 PM
03/21/18 10:44 PM
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Howell, Mi
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Originally Posted By MR_P_BODY
Could you hear the engine surging
wave

No. The only way they knew the jets were off is by the laptop.

Re: What went wrong? [Re: Shatar4] #2470078
03/21/18 10:46 PM
03/21/18 10:46 PM
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Romeo MI
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There is a lot of ups and downs in the pulls
wave

Re: What went wrong? [Re: MR_P_BODY] #2470080
03/21/18 10:50 PM
03/21/18 10:50 PM
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Howell, Mi
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Originally Posted By MR_P_BODY
There is a lot of ups and downs in the pulls
wave

There was then he changed the primary jets and it cleaned it up.
The last sheet is after the jet change. Was at Jakes for 5 hrs trying to figure this out.

Re: What went wrong? [Re: Shatar4] #2470093
03/21/18 11:10 PM
03/21/18 11:10 PM
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Oregon
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AndyF Online content
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Oregon
If it won't pull past 4000 rpm then I'd suspect that it is a valve train issue. Lifters are probably collapsing. Put a solid flat tappet cam in it and it will probably pull hard to 6500 rpm and give you 500+ hp.

Re: What went wrong? [Re: Shatar4] #2470138
03/22/18 12:23 AM
03/22/18 12:23 AM
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Cotati, CA
Dave Hall Offline
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FWIW, the graph looks like the car has a throttle stop on it! I agree with Andy and others that the valves aren't opening or at the wrong time. If you're going to go solid lifter, make it a solid roller.

Re: What went wrong? [Re: Shatar4] #2470256
03/22/18 10:16 AM
03/22/18 10:16 AM
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Marion, South Carolina [><]
an8sec70cuda Online content
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Nothing wrong w/ the parts list IMO. Definitely something stupid holding it back. The lifters could be an issue, but there's no reason a hydraulic shouldn't pull to 6k+ rpm. Might need different lifters if those are bleeding down. A solid roller would be my choice too, but the hydraulic you have should work.

Check things like where the cam is in at, verify the TDC mark on the balancer is where it should be, verify you don't have lobes going flat, etc.

FWIW...my old stock stroke 440, 10:1, basically stock 906 heads w/ the 509/292 purpleshaft (w/ stock stamped rockers and stock pushrods) made 340 hp on the chassis dyno and ran 11.80s at 112 mph at 3700 lbs.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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