Bill's 426 stroker (sans supercharger) dyno results - Cherokee SRT8 Forum
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post #1 of 32 (permalink) Old 05-03-2007, 04:31 PM Thread Starter
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Bill's 426 stroker (sans supercharger) dyno results

The 426 stroker (NO supercharger) was fired up yesterday.
Note that this currently has a STOCK cam and injectors and 9.0 compression ratio.
The engine is in transit to ASM to be torn down to install the new crank tone wheel on the crankshaft for the programmable electronics. I may play a little with camshafts on the ASM dyno since I will be able to adjust idle speed and A/F mixture at all RPM ranges.I believe that I am in the 10 psi supercharger range with the 9.0 compression pistons.
Bill
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426 Hemi engine specs.jpg   426 Hemi engine dyno results.jpg   426 Hemi engine dyno graph.jpg  
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post #2 of 32 (permalink) Old 05-03-2007, 04:35 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

About the only words I understood from that was 'fired up yesterday'. Aside from that I don't understand a lick..... but I'm sure it means really cool stuff
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post #3 of 32 (permalink) Old 05-03-2007, 05:06 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

Quote:
Originally Posted by BuilderBill
The 426 stroker (NO supercharger) was fired up yesterday.
Note that this currently has a STOCK cam and injectors and 9.0 compression ratio.
The engine is in transit to ASM to be torn down to install the new crank tone wheel on the crankshaft for the programmable electronics. I may play a little with camshafts on the ASM dyno since I will be able to adjust idle speed and A/F mixture at all RPM ranges.I believe that I am in the 10 psi supercharger range with the 9.0 compression pistons.
Bill

WOW nice crank numbers!!!!!!!.......with those kind of numbers why even supercharge it???
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post #4 of 32 (permalink) Old 05-03-2007, 05:09 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

Quote:
Originally Posted by generalconfusion
WOW nice crank numbers!!!!!!!.......with those kind of numbers why even supercharge it???
theres never enough power...
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post #5 of 32 (permalink) Old 05-03-2007, 05:11 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

Mind if I ask a few questions?
What is the dynamic compression ratio?
I know static is 9-1
What octaine fuel are you going to run?
With a static compression ratio of 9-1 your dynamic should hopefully around 8-1 or less because if all stays the same your final compression ratio with 10 LBS of boost and 9-1 dynamic will be around 15-1. Big octaine numbers.
What are you running for a quench height?
Nice run of torque out running HP!

I'm planning on doing the same just with a Whipple screw.


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post #6 of 32 (permalink) Old 05-03-2007, 05:25 PM Thread Starter
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Re: Bill's 426 stroker (sans supercharger) dyno results

Quote:
Originally Posted by generalconfusion
WOW nice crank numbers!!!!!!!.......with those kind of numbers why even supercharge it???
General,
I am so tempted to have the engine shipped to me as soon as the electronics (crank install) are completed. Yes, with the attached sheet, it sure makes a lot of usable power. With the stock 6.1 cam it should idle perfectly. It appears to be pretty decent on torque.
Bill
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post #7 of 32 (permalink) Old 05-03-2007, 05:31 PM Thread Starter
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Re: Bill's 426 stroker (sans supercharger) dyno results

Quote:
Originally Posted by Blown7
Mind if I ask a few questions?
What is the dynamic compression ratio?
I know static is 9-1
What octaine fuel are you going to run?
With a static compression ratio of 9-1 your dynamic should hopefully around 8-1 or less because if all stays the same your final compression ratio with 10 LBS of boost and 9-1 dynamic will be around 15-1. Big octaine numbers.
What are you running for a quench height?
Nice run of torque out running HP!

I'm planning on doing the same just with a Whipple screw.


jeff
Jeff,
I am sorry as he**. I am going to have to refer the questions to GE2

Fuel = 93 octane, same as now. Hmmm, don't like to here 15-1 compression.
Torque numbers look great as is.
All other questions are WAY over my head...I will have answers though as I proceed along. After all, before I started this project, I couldn't even spell stroker!

Hey guys...what do you think about staying with the stock cam??
Bill
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post #8 of 32 (permalink) Old 05-03-2007, 05:43 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

Quote:
Originally Posted by BuilderBill

Hey guys...what do you think about staying with the stock cam??
Bill
Usually believe it or not stock cams are a great choice if it's not a all out drag machine.


Jeff
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post #9 of 32 (permalink) Old 05-03-2007, 06:02 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

Quote:
Originally Posted by BuilderBill
Hey guys...what do you think about staying with the stock cam??
Bill
I for one am a believer in the smooth response and idle that a stock camshaft gives. That being said, it is basically going to be a decision you will need to make jointly with your engine builder. If you have limited knowledge on the subject, he should be able to explain the differences.

Also another another couple of points to factor in is (1) Are you definately going the FI route whether it be SC or turbo and (2) What are your goals?? i.e. Daily-driver boulevard brawler......or weekend track vehicle with consistent 1/4-mile times.

It may just be me, but those are my thoughts on the matter. I'm sure others will have some input as well. GL.
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post #10 of 32 (permalink) Old 05-03-2007, 06:05 PM
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Re: Bill's 426 stroker (sans supercharger) dyno results

I agree with Steve, Bill why supercharge it with those kind of numbers. But I do understand if you do

Insane numbers though!

If you can tune it do the cam what the hell, go for it!

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Last edited by Inferno SRT8; 05-03-2007 at 06:07 PM.
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