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69SSConv


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Dyno Day Tomorrow!
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Tomorrow I am taking the engine for my father/son project to Wheeler's to have it dyno'd.  Hoping it will put out at least 300hp.

It is 1980 vintage 350 block bored .030, built with:

Speed Pro Hypereutectic Pistons w/.180 Dish (to keep compression down for 87 oct, should be 8.75-9:00:1)

Vortec Heads (thank you Bryan)

Edelbrock Performer Intake

Lunati Cam & Lifter kit - 60101K 213/219, .454/.468

Comp roller tip rockers, & guide plates

Balanced assembly

Edelbrock 600 cfm carb.

 

Do you think I will get to 300hp?



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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
67ss


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I would think you should be close to that. The 290hp GM crate engine cam is close in specs but you have much better heads on your engine. I am guessing 300-325 horse.



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Chris P
East Central, Mn

66 Chevelle 300 deluxe
Chris R


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I was also going to guess about 325 horses as well.



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Chris - Ramsey, MN.

Dear Optimist, Pessimist, and Realist.

While you guys were busy arguing about the glass of water. I drank it!

Sincerly,

The opportunist.
SShink


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Where are you taking it to dyno?



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Stan S.-Twin Cities 'South Metro'

1972 Malibu Convertible 2nd time around 

2001 Mustang GT Convertible 

Forum influenced terms: 'Link Paste', 'Stanitized', & 'Revolving garage door...' 

 
69SSConv


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Taking it to Wheeler's in Blaine.

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
69SSConv


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Not a good day at the Dyno, no ones fault but mineI had my lower timing gear in wrong position and it was off by 120 deg.  Good news is we only spun it over by the starter, never did fire it up.  Bad news, bent some pushrods, and some exhaust valves.  Brought it home and pulled the heads, to have new exhaust valves put in.  Be a couple weeks before I can get it back to the Dyno.



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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Lost in the 60s


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 Ouch..............that hurts. Sorry to hear it. Might want to have the pistons checked for cracks in the dome too. Pushrods bend pretty easy but valve stems don't. That had to be a hard impact on aluminum.



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
69SSConv


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It does not look like there was any significant damage to the pistons, a very slight scuff to the surface on the outside edge of the dish.  Impact was on the very edge of the exhaust valve less than 1/8" surface area that impacted the piston?  There is no noticable bend in the valves, we pressurized the cylinders with air and had a very slight airflow through the exhaust port.



-- Edited by 69SSConv on Thursday 14th of April 2011 04:49:38 PM



-- Edited by 69SSConv on Thursday 14th of April 2011 04:50:40 PM

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Lost in the 60s


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Probably OK.



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
SShink


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Sorry to hear that Loren.  Hazards of the hobby I guess... I can personally vouch for destroying a functional 700R4 trans in an '88 Camaro just by trying to put a shift kit in myself about 10 years ago... I 'paid' for an education on that one! 



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Stan S.-Twin Cities 'South Metro'

1972 Malibu Convertible 2nd time around 

2001 Mustang GT Convertible 

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Chris R


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Thats too bad Loren. Sounds like minor damage but make sure they check to make sure the valve guide and cylinder head pocket didnt get any damage near that valve.



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Chris - Ramsey, MN.

Dear Optimist, Pessimist, and Realist.

While you guys were busy arguing about the glass of water. I drank it!

Sincerly,

The opportunist.
bowtie


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That sucks. At least you know the cause and can track the damage.

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Bryan-NW 'burbs
1972 Malibu
Vaguely stock appearing, and the opposite of restored.
1999 std bore 5.7, Vortec heads, Holley Stealth Ram, GM cam
700R4, Viking coilovers, 12 bolt 4.10 posi, and a whole bunch more
69SSConv


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Back to the Dyno this afternoon.  I am sure I will have much better results this time.  I will provide details tonight.

 



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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Enganeer


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Good luck! 



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John E - Rogers, MN

Instructions? All I need is the exploded view.
70 El Camino soon to be ls1/t56
64 Malibu SS
Chris R


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Good luck. Your probably watching it run on the dyno as I type this.



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Chris - Ramsey, MN.

Dear Optimist, Pessimist, and Realist.

While you guys were busy arguing about the glass of water. I drank it!

Sincerly,

The opportunist.
69SSConv


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Update.

Dyno day went well, had a minor hiccup but OK all in all went well.  Used the shop carb, engine started immediately and ran it through the 20 minute break-in period without a hitch.  Then the engine just died.  Turns out that my rotor in my GM HEI distributor came apart?  Ran down to Auto Zone to get a new rotor, installed and nothing?  At that point we dropped in a shop distributor and made some pulls on the motor.

Drum roll................

With the shop Holley 750

Peak hp 319hp

Peak torque 391

switched to my Edelbrock 1406 (unknown condition carb, came with motor)

Peak hp 303

Peak torque 379?


Forgot my sheets on the counter at Wheelers, will get from Jeff later this week.



-- Edited by 69SSConv on Wednesday 27th of April 2011 03:57:14 PM

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Winston Wolf


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How high were the peaks, and when did it start to fall off?



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Chris R


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Looks like you lost over 15 HP by swapping the Holley for the Edelbrock. Sounds like it was a good day. 



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Chris - Ramsey, MN.

Dear Optimist, Pessimist, and Realist.

While you guys were busy arguing about the glass of water. I drank it!

Sincerly,

The opportunist.
Lost in the 60s


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That's a decent cruiser engine.....

You'll never notice 15hp/lbs ft torque difference in a street car.....



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
69SSConv


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Don't remember where the peaks were, when I get the printouts, that I left there I will post.

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
69SSConv


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Think the module might be the problem with the GM HEI distributor? No apparent broken wires, grounds all seem to be OK? Any ideas?

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Lost in the 60s


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If it's an older one with vacuum advance, the tiny wires break right where they come out of the pick up coil from flexing. They can be hard to see if the plastic insulation is still holding them together.



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
69SSConv


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I am also wondering if there is too much play in the distributor? When the rotor came apart it appeared as though the contact hit inside the cap and tore the contact off the rotor? Inside the cap looked fine, no unusual edges, etc. Think I might just need to pick up a new distributor?

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Winston Wolf


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For the price of a new dist, I would just pick one up and avoid all the headaches.  Also, if that Edelbrock is jetted/tuned correctly, you should lose nothing to a Holley at the HP level you are at.  They are good carbs and work well.



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Bungy L-76


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Congrats Loren! Sounds like it was a good day overall. I agree that you shouldn't lose 15hp from the carb swap. The dyno sheets should tell you if the Edelbrock was running lean or rich and you can swap in some metering rods to get back the 15hp. Maybe need a rebuild kit in it also.



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1964 Malibu Convert
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www.worldracingleague.org 

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69SSConv


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I plan on going through the carb, as I did not before the Dyno, linkage was a little sticky, so I am sure if I go through and clean it up it should give back some of the lost hp.

I am also planning to ditch the distributor and install a MSD Streetfire or something along that line.

 



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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
Lost in the 60s


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69SSConv wrote:
I am also planning to ditch the distributor and install a MSD Streetfire or something along that line.

 

Good plan. I was hoping you weren't going to get one of those $59 Chinese pieces of junk off ebay...

 

 

 



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
SShink


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Loren, if I could rebuild my Edelbrock and have it perform almost identical to the dyno shop Holley that had been VERY tricked out, you can do it too!  This was the first Edelbrock carb I had ever rebuilt, and it turned out great.

Agree with Winston and Bungie that there shouldn't be that much of a HP drop by changing carbs if they are both functioning properly.  IMO 



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Stan S.-Twin Cities 'South Metro'

1972 Malibu Convertible 2nd time around 

2001 Mustang GT Convertible 

Forum influenced terms: 'Link Paste', 'Stanitized', & 'Revolving garage door...' 

 
69SSConv


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Got my Dyno sheets today. (Holley Shop Carb)


Peak torque is at 3900 rpm = 391.0

Peak hp is at 4900 rpm = 318.5

AFR Ratio @ 4900 = 12.4

 

Edelbrock, which has not been rebuilt and linkage is sticky, not sure secondary's even opened up all the way??

Peak Torque at 4000 rpm = 373.0

Peak hp at 4900 rpm = 303.1

AFR Ratio at 4900 = 11.8



-- Edited by 69SSConv on Thursday 28th of April 2011 07:37:44 PM

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
SShink


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Loren, that's a torquey engine for what I would call a 'warmed over' small block! That should scoot that Camaro right along! 

It's torque is similar to how my mostly stock 407 BBC dyno'd other than being at a higher rpm (mine was 382 ft. lbs. at 4200 if I remember right).



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Stan S.-Twin Cities 'South Metro'

1972 Malibu Convertible 2nd time around 

2001 Mustang GT Convertible 

Forum influenced terms: 'Link Paste', 'Stanitized', & 'Revolving garage door...' 

 
Lost in the 60s


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Yes, that's a great street engine with a 5000 rpm shift point. Once you have the Edelbrock working correctly, it will match the Holley and be less finicky with temp changes........and THIS from a lifelong Holley fan....



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS/RS 350 M20
Winston Wolf


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69SSConv wrote:

Got my Dyno sheets today. (Holley Shop Carb)


Peak torque is at 3900 rpm = 391.0

Peak hp is at 4900 rpm = 318.5

AFR Ratio @ 4900 = 12.4

 

Edelbrock, which has not been rebuilt and linkage is sticky, not sure secondary's even opened up all the way??

Peak Torque at 4000 rpm = 373.0

Peak hp at 4900 rpm = 303.1

AFR Ratio at 4900 = 11.8



-- Edited by 69SSConv on Thursday 28th of April 2011 07:37:44 PM

 I would clean up the Performer carb, go one stage leaner in the primaries, and run it.  It it drives well then, leave it alone.  Be sure to tune the idle mixture screws with a vacuum gauge in drive, and you should be good to go.

 



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Scott Parkhurst


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Congrats Loren!


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Scott Parkhurst

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Bowtieman427


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69SSConv wrote:

Got my Dyno sheets today. (Holley Shop Carb)


Peak torque is at 3900 rpm = 391.0

Peak hp is at 4900 rpm = 318.5

AFR Ratio @ 4900 = 12.4

 

Edelbrock, which has not been rebuilt and linkage is sticky, not sure secondary's even opened up all the way??

Peak Torque at 4000 rpm = 373.0

Peak hp at 4900 rpm = 303.1

AFR Ratio at 4900 = 11.8



-- Edited by 69SSConv on Thursday 28th of April 2011 07:37:44 PM

 With an AFR of 11.8 the Edelbroock is running to rich @ 4900 RPM. Not sure if in primary or sencodary section. Your Dyno sheet may have AFR printed out at different RPM points. May see it running right on then start going  rich or it may be rich all the time or at certian points lean and rich. You should study your Dyno sheet and make carb ajustments against it.

Mechanial or vacuum advance ? Vacuum will only open to what demand is put on it. 

 



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Jim  -- Pine Island, MN
69SSConv


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It is a vacuum advance. I ordered some smaller jets for it today and rebuild kit. As part of the rebuild I will adjust the jets to bring things more in line.

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Loren B. - Princeton, MN

1969 Chevelle SS Convertible, Bright Torch Red, 396, 200-4R, 12 bolt 3.73 Posi

1969 Chevrolet C20, Orange/White, 350, 4-spd, 4.11

1980 Camaro, RS, Impulse Blue, 350, 200-4R, 3.73 Posi

1967 Chevelle Malibu 2-DR Hardtop.  In process
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