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DYNO RESULTS - 390 stroker

July 15 2011 at 8:19 PM
John Norris  (Login John67FairlaneGT)
Members

This was my first time having an engine dynoed and having something built like this. I was pleased with the results, but more happy that things went so well... had to do minimal tuning and nothing went wrong.... carnage, leaks, etc.

Dyno: SF-901

All runs were made on straight PUMP GAS - 91 OCTANE.

654 HP @ 6700 (TRQ was 512) (VE% 104.9)

552 TRQ @ 5300 (HP was 557) (VE% 102.2)

The dyno operator thought it needed more carb actually (Dominator 1250 and would get about 20 more HP)

Barry @ Survival provided the Stroker kit, BT MR heads Stage X and Cam

HERE ARE THE SPECS:

Ford FE 390 / 451 stroker
D4TE/ 105 mirror block (stroke 4.25, 4.11 bore - 451 C.I.)(sonic checked very good)

Compression: 11.5

Blue Thunder MR heads-Stage X, T&D roller rockers

Solid Roller Cam, Intake .697, Exhaust .695, Duration @ .050: Intake 264, Exhaust 272

Victor manifold port matched, Pro Systems 1000HP carb

MSD distributor

R.E.F. Unlimited headers: 2 1/8, 3.5 collector

Electric water pump




    
This message has been edited by John67FairlaneGT on Jul 15, 2011 8:54 PM


 
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(Login edgar427)
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great numbers !!

July 15 2011, 9:04 PM 

great numbers, i cant wate to see some time slips from this beast. i built a stroker amd it realy goes.[linked image]

 
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(Login tomposthuma)
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very stout

July 15 2011, 10:38 PM 

Impressive power indeed.

 
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Barry R
(Login Barry_R)
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Wow

July 16 2011, 2:36 AM 

That is the highest horsepower N/A 390 based engine I've ever seen. Very good job on getting it together.

Be fun to see it go down the track.

Got any pics/dyno sheets?

Barry Rabotnick
Survivalmotorsports.com

 
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John Norris
(Login John67FairlaneGT)
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Yes, have dyno sheets, I'll have to scan....

July 16 2011, 8:44 AM 

them on Monday at the office and see if I can post them up here. If not, I'll email them to you. No pics, but I do have some video that I'll also try and post.

 
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John Norris
(Login John67FairlaneGT)
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Have dyno sheets scanned, not sure how to post PDF file n/m

July 18 2011, 11:44 AM 


 
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(Login blykins)
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Cross bolted block? n/m

July 16 2011, 4:10 AM 



Brent Lykins
B2 Motorsports, LLC







 
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3pedal
(Login 3pedal)
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Who built the engine

July 16 2011, 5:52 AM 

Sounds like a NASCAR builder,tremendous results.....3p

 
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(Login qikbbstang)
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Ditto "Cross bolted block? "

July 16 2011, 6:49 AM 

c

bb

 
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John Norris
(Login John67FairlaneGT)
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LOL, no NASCAR builder, just a...........

July 16 2011, 8:48 AM 

"local guy" that prides himself being taught the "old school" way and is a heck of a 6.0 diesel mechanic.


 
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John Norris
(Login John67FairlaneGT)
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delete double post n/m

July 16 2011, 8:48 AM 


 
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John Norris
(Login John67FairlaneGT)
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Here a couple of short video clips

July 16 2011, 12:30 PM 


 
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Nick
(Login torinothreeninety)
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654hp? - holy $hit!

July 16 2011, 1:03 PM 

likewise, my concerns are the same. how much will a stock 390 block take?

fantastic numbers, hats off to your engine builder.

'68 GT390 sportroof 445 stroker. 478/505,C6,3.25posi

 
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Paul Lovett
(Login Paul_Lovett)
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Never underestimate the power of a big-ass cam!

July 17 2011, 9:56 AM 

Maybe it's not a full race cam, but it's big compared to what I'm used to. Very nice build with unexotic parts. Way cool!

paulie

 
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(Login Paul_Lovett)
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Speaking of which, what is the advertised duration and lobe separtion?

July 17 2011, 9:59 AM 

If'n you don't mind.

paulie

 
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John Norris
(Login John67FairlaneGT)
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Mentioned duration above, but those #'s are....

July 17 2011, 10:17 AM 

Duration @ .050 264 / 272
Lobe Separation 110.0

 
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Paul Lovett
(Login Paul_Lovett)
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I was wondering what the advertised duration is? That'd most likely be the numbers @0.020"

July 17 2011, 10:20 AM 

Or what lobes are they, again if you don't mind sharing.

Thanks for the lobe separation.

paulie

 
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John Norris
(Login John67FairlaneGT)
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Thanks for the compliments....

July 17 2011, 10:06 AM 

Needless to say, I'm pretty stoked to get 1.45HP per C.I. and on 91 octane. I will scan my dyno sheets tomorrow at the office and see if can get them to post on here, but would be willing to email them if anyone is interested. I can understand if there would be skepticism for sure.

 
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Mr. Quick
(Login quickponey)
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Congratulations on your stroker 390! It would be interesting

July 17 2011, 10:54 AM 

to compare your dyno results on another dyno. Not to steal any of your excitement but, my friend bought a used 901 (which I am learning to operate) from a guy who said that there can be as much as 50 HP and TQ swings from dyno to dyno...depending on calibration and cooling methodology. The fact that this was acheived with 91 octane is saying something!
All thing being equal, you will know when you make the first complete pass. Good luck!

1967 Cougar 12.0 Street Car
1967 Mustang S Code FB(in body shop now for final paint)
1968 Mustang GT 350 (next to restore)
1964 Comet AFX 427 Project (for sale)
1966 Comet 428 Drag Car (test & tuning)
Non mi rompere le palle

 
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John Norris
(Login John67FairlaneGT)
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Very true, but at $600-1,000 for a dyno session, ...

July 17 2011, 11:27 AM 

I'll just have to wait and use the E.T. slip to gauge it's accuracy. They did say they some say their dyno is a bit stingy and they are a pretty reputable shop. http://www.cpgnation.com/forum/greeley-automotive-machine-builds-championship-power-4249.html

 
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(Login blykins)
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Dynos are a necessary evil....

July 17 2011, 11:59 AM 

Every customer wants their engine dyno'd, but then you are compared against every other builder that's on the internet...including the ones with "happy" dynos.

My opinion is, if you do in fact find a "stingy" dyno, then you're a lot better off. I'd rather have a 400hp engine that whoops all the 500hp engines' butts....or an engine with 450hp that runs in the 10's against a 600hp engine that runs in the 11's. It happens.

I think there was an issue somewhere with the fuel or the exhaust. If you ignore the horsepower/torque numbers and just look at the camshaft specs vs the peak horsepower rpm, it seems like that's a lot of cam to only pull to 6700, especially with BT MR heads. I have pulled 428's to 6500 with Edelbrock heads that just had fancy valve jobs....with 20° less duration. A 445-450ci engine is certainly larger than a 428, which will "eat up" a little duration, but those BT heads should be head and shoulders above basic Edelbrocks, even with 390 sized valve packages.

As for the octane requirements, the BT heads certainly have a more efficient chamber. However, I would be very leery about running 91 octane while you're on the street. An engine in a car behaves a lot differently than an engine in a dyno...its loaded differently, outside heat, header heat, etc, etc. With 11.5:1 compression, even with longer advertised durations and efficient combustion chambers, I'd play it safe and run some real good gas.

All in all, I say congratulations on a nice engine.

I wouldn't say that anyone is skeptical, but as they say, the proof is in the pudding. A lot of people have been burnt with overrated street and race engines. A guy brought me a 482ci BBC the other day that had puked. The builder had told him that the engine was 750hp....complete with Procomp heads, factory rods, and a factory GM crankshaft. wink.gif


Brent Lykins
B2 Motorsports, LLC







 
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John Norris
(Login John67FairlaneGT)
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The dyno operator did say the heads were capable of much more,

July 17 2011, 1:36 PM 

The dyno operator did say the heads were capable of much more, but due to the engine displacement (451 C.I.) and RPM limitation (we did take it to 7K rpm, but HP would start falling at 6800-7000, we did not see the point of flogging it past 7000) that's what we were able to get.

No issue with the fuel. Yes, I agree I will have to see how it does on the street and the pump gas may have to be spiked a bit. I do live in Colorado, so altitude is factor and you can get away with running a bit more compression.



 
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(Login ECTARACER)
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Hey, John....

July 17 2011, 3:13 PM 

are those 'Denver' heads? happy.gif

KS

 
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(Login Posi-67)
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Any idea what the sample rate

July 17 2011, 10:12 PM 

was? It's measured in RPS or revs per second. As I understand it, a lower sample rate will give a higher HP rating and vice versa. Standard practice is 300 I believe but could be wrong on all the above. Sounds like a good combination to come up with those numbers with the exception of the comp ratio and low octane fuel. Even at 11.5 I'd expect you'd need more octane. Car info will help with the ET guessing game we're so fond of here.

 
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John Norris
(Login John67FairlaneGT)
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Yes, set/ran at 300 RPM/ Second Acceleration n/m

July 18 2011, 12:05 PM 


 
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