Project 350 build/It's finally done
May 11th, 2018, 04:39 PM
#1
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Join Date: Nov 2008
Location: Central Fl
Posts: 7,826
Project 350 build/It's finally done
Instead of burying this on the back page of the original thread, I thought I'd start a new one.
I mentioned this a long time ago, I was going to do a build on my own with the parts and pieces I've recommended over the years, along with the new piston from Mahle.
Well it's done, here are the final specs;
350 gas block bored to 4.100
Square decked to 9.315
Align honed with ARP bolts
N crank, .010/.020
Stock Rods
QF Slayer 750 carb
RPM intake, untouched
Erson TQ40 cam (what else right!)
7a heads with 2.00/1.62 valves, very minor bowl cleanup.
Dividers welded, crossovers filled
Mahle 10cc piston, 9.4:1 compression
Cloyes 9 keyway double row chain set
Stock Pan
Stock pump with purple spring
Valvoline VR1 10W-30
Run on 89 octane
Here are the dyno sheets. Is there any question why I'm such a huge fan of the Slayer carb? 1 jet change, 1 air bleed change and look at the fuel curve, perfect. Try that with a Qjet, or anything else for $325.00 for that matter.
I mentioned this a long time ago, I was going to do a build on my own with the parts and pieces I've recommended over the years, along with the new piston from Mahle.
Well it's done, here are the final specs;
350 gas block bored to 4.100
Square decked to 9.315
Align honed with ARP bolts
N crank, .010/.020
Stock Rods
QF Slayer 750 carb
RPM intake, untouched
Erson TQ40 cam (what else right!)
7a heads with 2.00/1.62 valves, very minor bowl cleanup.
Dividers welded, crossovers filled
Mahle 10cc piston, 9.4:1 compression
Cloyes 9 keyway double row chain set
Stock Pan
Stock pump with purple spring
Valvoline VR1 10W-30
Run on 89 octane
Here are the dyno sheets. Is there any question why I'm such a huge fan of the Slayer carb? 1 jet change, 1 air bleed change and look at the fuel curve, perfect. Try that with a Qjet, or anything else for $325.00 for that matter.
Last edited by cutlassefi; May 11th, 2018 at 04:49 PM.
May 12th, 2018, 07:20 AM
#6
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Join Date: May 2011
Location: Delta BC Canada
Posts: 3,688
dyno sheets
Good Job Mark.
Attached are the dyno sheets rotated for easier reading. Still difficult to read when enlarged.
Enlarging the photo I think I read (correct me if I am not reading that right).
416.3 hp @ 5800 and 418.2 TQ @ 4500
I would like to see the same build but with the 4.00" crank in place of 3.385" stock crank. it would be very interesting to see the HP & TQ gains from the increased stroke.
Attached are the dyno sheets rotated for easier reading. Still difficult to read when enlarged.
Enlarging the photo I think I read (correct me if I am not reading that right).
416.3 hp @ 5800 and 418.2 TQ @ 4500
I would like to see the same build but with the 4.00" crank in place of 3.385" stock crank. it would be very interesting to see the HP & TQ gains from the increased stroke.
Last edited by oldsmobiledave; May 12th, 2018 at 07:26 AM.
May 17th, 2018, 05:33 AM
#8
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Join Date: Jun 2014
Location: Ft. Wayne, IN
Posts: 1,195
Just to clarify (I didn't see this mentioned here), this engine used the stock crank / stroke?
Reason I ask is that I'm looking at a rebuild on my 350 in the next few years and have been following cutlassefi's development of the new rod/piston/crank combinations, and as a result am getting really encouraged that I will be able to shoot higher than my original ~400HP goal without getting crazy w/ the compression ratio. 416HP w/ only 9.4:1 CR seems pretty impressive to me. I too would be interested in seeing what the increased stroke crank does to these power numbers.
Exciting times for SBO owners!
Reason I ask is that I'm looking at a rebuild on my 350 in the next few years and have been following cutlassefi's development of the new rod/piston/crank combinations, and as a result am getting really encouraged that I will be able to shoot higher than my original ~400HP goal without getting crazy w/ the compression ratio. 416HP w/ only 9.4:1 CR seems pretty impressive to me. I too would be interested in seeing what the increased stroke crank does to these power numbers.
Exciting times for SBO owners!
May 17th, 2018, 10:52 AM
#9
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Join Date: Nov 2008
Location: Central Fl
Posts: 7,826
It’s mentioned, stock N crank and rods.
The heads are the limiting factor here. The stroker build made way more tq but a little less hp because it had less compression, less camshaft and heads that weren't quite as good, although still not great. Hope this helps.
The heads are the limiting factor here. The stroker build made way more tq but a little less hp because it had less compression, less camshaft and heads that weren't quite as good, although still not great. Hope this helps.
Last edited by cutlassefi; May 17th, 2018 at 11:03 AM.
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