Strange dyno results - Team Camaro Tech
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post #1 of 73 (permalink) Old Aug 27th, 14, 01:59 PM Thread Starter
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Strange dyno results



Look at the end of the graph. What is going on there? Looks like scribbling. Was told its probably timing and or fuel(smells rich).

So I'm asking the experts, where do I start? I can post a full list of all known mods and parts if you guys think it will help.

541ci V8 block (IA-II by Butler Performance)
Roland Racing CV-1 heads fully ported
Roland Racing (high rise) intake
Harland Sharp aluminum roller rockers
Ultra Dyne Racing Cams custom cam
--duration at .050 intake:270 exhaust :280
Duration at .020 301 314
Gross valve lift .710 (both)
Lobe lift .4176 (both
Oliver Racing Connecting Rods
Holly Dominator 1150 Carb
K&N filter and Xstream lid
March Performance Pulleys serpentine system
Be Cool Aluminum radiator with dual electric fans
MSD Digital Ignition system with Digital 6 Plus control box
MSD Coil (matches the Digital 6 Plus)
PQx flexplate
Aeromotive A1000 fuel pump
Aeromotive adjustable fuel pressure regulator

PS:
Turbo 400 performance build with 3500 RPM stall convertor(see trans section for post about low numbers because of the stall?) https://www.camaros.net/forums/showth...25#post2625425

Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ
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post #2 of 73 (permalink) Old Aug 27th, 14, 02:14 PM
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Re: Strange dyno results

Any chance your MSD chip preventing you from going higher? Lots of good stuff here.

Don
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968

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post #3 of 73 (permalink) Old Aug 27th, 14, 02:33 PM Thread Starter
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Re: Strange dyno results

Quote:
Originally Posted by zdld17 View Post
Any chance your MSD chip preventing you from going higher? Lots of good stuff here.
The MSD rev limit is 6600, just looked at the digital 6 box and here are the settings, since you probably can't see in the pic:
6. 9. 9. 3. 0. 6. 4.


(Step retard is 9.9, RPM 2 Step Rev Lim is 30(3000), rpm max rev lim is 66 (
(6600)

Retard seems a little extreme, wondring if it it's as never changed after blower was removed(or if maybe Nitrous was on after the blower was removed)

Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ

Last edited by SnakeEyes; Aug 27th, 14 at 02:44 PM.
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post #4 of 73 (permalink) Old Aug 27th, 14, 02:46 PM
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Re: Strange dyno results

WoT is a rich mixture anyway.....do u have the O2 /rpms graph numbers?
This will tell u if it is timing, a miss in the timing or very excessive mixtures
The break down starts about the 5300/ 5400 rpms.
The suggestions above, or maybe as simple as a Spark plug or HT lead....someone has pulled a HT lead off by the lead, that once, or dropped a spark plug on the ground...and not thrown it away.

My Spelling is not incorrect...it is creative

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post #5 of 73 (permalink) Old Aug 27th, 14, 03:11 PM Thread Starter
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Re: Strange dyno results

Quote:
Originally Posted by Steptoe View Post
WoT is a rich mixture anyway.....do u have the O2 /rpms graph numbers?
This will tell u if it is timing, a miss in the timing or very excessive mixtures
The break down starts about the 5300/ 5400 rpms.
The suggestions above, or maybe as simple as a Spark plug or HT lead....someone has pulled a HT lead off by the lead, that once, or dropped a spark plug on the ground...and not thrown it away.
There are A/F ratio number on the bottom of the graph. That's all I have, I'm not sure where where they put the sensors.

I recently checked the plugs, and a terminal came off the wire and stayed on the plug. I had to pull the boot and crimp it back, on the wire, is that what your talking about? It still idled and ran fine on the street after that.


Here is a video, sadly hit the record button a little late, but I got most of the run.

1967 Firebird 541 V8 Dyno Pull: http://youtu.be/Xt_-wAXVcDM

Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ
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post #6 of 73 (permalink) Old Aug 28th, 14, 08:07 AM
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Re: Strange dyno results

What diameter pushrods are in the engine?

Chris

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post #7 of 73 (permalink) Old Aug 28th, 14, 08:36 AM Thread Starter
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Re: Strange dyno results

Quote:
Originally Posted by cstraub View Post
What diameter pushrods are in the engine?
The invoice I have just has a PN, which is for " Custom" reverse dome pistons. If you search the PN on butler it says the same thing.

But the piston rings have a size:
4.380


I asking on another site also, was given a new set of settings for my Digital 6 box, he said what I said, 9.9 retard doesn't seem right with no blower, probably leftover from the blower and never changed.

I have put them in and going for a drive soon

Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ
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post #8 of 73 (permalink) Old Aug 28th, 14, 08:42 AM
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Re: Strange dyno results

Quote:
Originally Posted by SnakeEyes View Post
There are A/F ratio number on the bottom of the graph. That's all I have, I'm not sure where where they put the sensors.

I recently checked the plugs, and a terminal came off the wire and stayed on the plug. I had to pull the boot and crimp it back, on the wire, is that what your talking about? It still idled and ran fine on the street after that.


Here is a video, sadly hit the record button a little late, but I got most of the run.

1967 Firebird 541 V8 Dyno Pull: http://youtu.be/Xt_-wAXVcDM
Change that wire and try it. Inner core may be damaged
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post #9 of 73 (permalink) Old Aug 28th, 14, 10:38 AM
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Re: Strange dyno results

Chris was asking about the pushrods, not the stuff about the pistons. Maybe call Butler. I would also ask them what valve springs are in it.

I think starting with a check of that one plug wire (and maybe all of them) is in order first.

So what is the history of this engine? Was previously setup for a blower?

What is the current static compression ratio? I know the camshaft may have been changed to compensate around that. Just curious.

68 Camaro SS 396 - 468 BBC now, M21, 12 bolt 3.73 coded housing but w/ 3.31 gears.
Looking for 68 Camaro with body number NOR 181016
CRG -
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post #10 of 73 (permalink) Old Aug 28th, 14, 10:57 AM
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Re: Strange dyno results

Quote:
Originally Posted by SnakeEyes View Post
The invoice I have just has a PN, which is for " Custom" reverse dome pistons. If you search the PN on butler it says the same thing.

But the piston rings have a size:
4.380


I asking on another site also, was given a new set of settings for my Digital 6 box, he said what I said, 9.9 retard doesn't seem right with no blower, probably leftover from the blower and never changed.

I have put them in and going for a drive soon
What is the PN on your invoice about the pushrods or do you know the size and type ? I am guessing 5/16" and 1.625 valve springs?

Butler is into Pontiac motors, Is this a Ponticac? Did they provide a dyno sheet with this motor or did you buy pieces?

Don
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968

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Last edited by zdld17; Aug 28th, 14 at 11:08 AM.
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post #11 of 73 (permalink) Old Aug 28th, 14, 11:57 AM
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Re: Strange dyno results

Quote:
Originally Posted by zdld17 View Post
What is the PN on your invoice about the pushrods or do you know the size and type ? I am guessing 5/16" and 1.625 valve springs?

Butler is into Pontiac motors, Is this a Ponticac? Did they provide a dyno sheet with this motor or did you buy pieces?
The engine is installed in a 67 Firebird
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post #12 of 73 (permalink) Old Aug 28th, 14, 12:09 PM
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Re: Strange dyno results

Quote:
Originally Posted by satz28 View Post
The engine is installed in a 67 Firebird
Yes, we know what motor is in. But is this a Pontiac bb or a chev bb?

OK, I just woke up , This is a Pontiac motor and CV-1 are canted valve heads by BP. Sorry my ignorance.

Don
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968

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post #13 of 73 (permalink) Old Aug 28th, 14, 01:04 PM
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Re: Strange dyno results

Quote:
Originally Posted by zdld17 View Post
Yes, we know what motor is in. But is this a Pontiac bb or a chev bb?

OK, I just woke up , This is a Pontiac motor and CV-1 are canted valve heads by BP. Sorry my ignorance.
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post #14 of 73 (permalink) Old Aug 28th, 14, 02:06 PM Thread Starter
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Re: Strange dyno results

Quote:
Originally Posted by zdld17 View Post
Yes, we know what motor is in. But is this a Pontiac bb or a chev bb?

OK, I just woke up , This is a Pontiac motor and CV-1 are canted valve heads by BP. Sorry my ignorance.
Nope, CV-1 are by Roland Racing. Butler uses Edelbrock heads on their engine packages.


Valve springs are 1.530", 7/16" Titanium Retainers

Do ng cups are 1.680" OD, .577" ----1.550" spring OD.

Give me a few minutes. Found another receipt in the stack I didn't really notice before. I'm sitting them and will out up pics shortly.

Edit: just found a order sheet also, stapled in some instructions for the block.

Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ
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post #15 of 73 (permalink) Old Aug 28th, 14, 02:27 PM Thread Starter
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Re: Strange dyno results

Here is everything, and what I just "found" in the instructions











Formers: 1969 RS 350, 700HP 1967 Flash-in-a-pan Firebird 400, 2002 Z28 M6 1SC/1SZ

Last edited by SnakeEyes; Aug 28th, 14 at 02:43 PM.
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