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  #31 (permalink)  
Old 02-06-2013, 09:58 AM
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If you have to type the results,include a/f ratios and sfc

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  #32 (permalink)  
Old 02-06-2013, 10:53 AM
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300/360

Quote:
Originally Posted by Waksabi View Post
too much cam.
waksabi,why do you say too much cam? look at the dyno results
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  #33 (permalink)  
Old 02-06-2013, 01:47 PM
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Quote:
Originally Posted by 1971chev View Post
So with a cam swap and long tubes what kind of hp could I see.

Assuming no other power killing issues at least another 15%.
This is the minimum I would expect. and the power and torque will come sooner.
The truck will feel a lot more torquey and powerfull. You won't need the dyno to tell you that.

First test ride is going to be a eye opener.

Make sure you have correct valve springs
the fuel system has to keep up @ WOT.
carb is a bit too small.
more boost.
You have barely scratched the power potential.

further: the dyno only tells you how much power is created.
it does not tell you if you are making good use of it. (acceleration)
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  #34 (permalink)  
Old 02-06-2013, 01:50 PM
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tell me what matters more. A dyno number you can brag about and/or get a warm fuzzy feeling about,.... or a fast truck?

This blown 327 has the potential to make in excess of 480hp (engine dyno)
way over 500hp+++++++++ on race gas and high boost.

and push your truck to mid 11 second ET's with traction.
Thats a fast pick up truck.

Remember a dyno is just a testing device to see power gains and losses from the changes you make.
if you are after a big number, for the sake of a number ,, from a chassis dyno you are going to be humbled.

The dyno number created will improve every time you improve the combo.
If I/or anyone else could tell you exactly what x+Y='s we would not need test dynos at all.
You could just pay me the dyno test $$$'s and I'd ask my magic squirrel and he'd tell us all. And I'd give my magic squirrel a peanut. and we would not need any more dynos or real dyno testing.

What power number would you like me to tell you? How much money do you got?

How much work are you wiling to do to actually find make the improvements to the engine so it
can make more power?

The dyno will tell you when you have made a gain or made a loss. That is its purpose.
Controling the test conditions and eliminating common power robbing faults ( fuel/spark/ mechanical etc)
matter.

You have made a good start but you have a bit of a testing and learning curve and you will not solve all the issues in 1 day.



This is R O C K Y My Magic Squirrel. Way more flattering than any Dyno....

Last edited by F-BIRD'88; 02-06-2013 at 02:14 PM.
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Old 02-06-2013, 01:56 PM
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Im thinking a fast truck would be alot better than a dyno number, would still be nice to break 400 at the wheels I dont see why that would be a problem, I did it with a 4.6 mustang on 6 psi of boost
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  #36 (permalink)  
Old 02-06-2013, 02:23 PM
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DYNOS are tools!

Quote:
Originally Posted by 1971chev View Post
Im thinking a fast truck would be alot better than a dyno number, would still be nice to break 400 at the wheels I dont see why that would be a problem, I did it with a 4.6 mustang on 6 psi of boost
you can take the dyno numbers other than just peak power numbers,like,,,SFC and compare that to your A/F numbers,then compare where your peak torque occurs,RPM wise and peak RPM of the top of the horse power curve.
See if the RPM levels match what you want for a finished product?
If your torque figure is in the wrong proportion to your horse power figure find out why,,,,camshaft has already been addressed,,,,
decide if 1 3/4 tube primary headers are in fact better than 1 5/8 headers for your application?

dont rant about the top power figures until the proper tuning is finished
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  #37 (permalink)  
Old 02-06-2013, 02:24 PM
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Well I have shown you the areas where there are major obvious supercharged power restricting issues.
And further dyno testing will verify gains you make by improving it.
The drag strip will tell you if its fast and show you when you have made it faster.
ny adding engine power, improving traction and using the engine power more efficiently.

They are both usefull tools.

The 177 blower is well capable of making well over 650 real engine horsepower.

A chassis dyno typically shows a number that is between 15% to 30% less than the engine brake dyno test numbers.
and there are many many variables.

Higher 1/4 mile MPH from the track means more engine power.

the math is 234 x the cubic root of (weight to power) ='s road horsepower

weight is with driver.

Last edited by F-BIRD'88; 02-06-2013 at 02:31 PM.
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  #38 (permalink)  
Old 02-06-2013, 02:33 PM
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Do the mods everyone agrees on,bigger carb,better exhaust,different cam timing.Do some serious math.And listen to fbirds magic tree rat,you should make very big improvements. Dyno would be nice to set the fuel curve safely
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  #39 (permalink)  
Old 02-07-2013, 11:15 AM
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Quote:
Originally Posted by 1971chev View Post
I just dynoed my 327 and came out with 300 rwhp and 360 ftlbs with 6 pounds of boost through a weiand 177. The motor is bored 30 over 9-1 compression ported double hump 64 cc heads, comp 292 h cam and ram horm manifolds. My question is why does the 300 seem low for this motor.

Didnt read the entire post so maybe i missed something but 300 does seem low for a 327 with a blower. I think 327 with that cam and good heads should make 300 without the blower.

What type of dyno did you use. Was it a mustang dyno otherwise known as the heart breaker. They read much lower than most dynojet dynos.

Was the engine tuned for the blower to safe or performance levels. sounds like its got the safe tune running and needs some tuning to make some power.

Also do you have a lean rich guage hooked up. This is very important on a blown engine. Helps keep the tune in safe level and can alert you if the fuel pressure drop suddenly.
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  #40 (permalink)  
Old 02-07-2013, 11:31 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
tell me what matters more. A dyno number you can brag about and/or get a warm fuzzy feeling about,.... or a fast truck?

You could just pay me the dyno test $$$'s and I'd ask my magic squirrel and he'd tell us all. And I'd give my magic squirrel a peanut. and we would not need any more dynos or real dyno testing.



You have made a good start but you have a bit of a testing and learning curve and you will not solve all the issues in 1 day.



This is R O C K Y My Magic Squirrel. Way more flattering than any Dyno....


Youre crazy man. I can dig.
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  #41 (permalink)  
Old 02-07-2013, 02:23 PM
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How well will the summitt cam k1105 has anyone ever used this one
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  #42 (permalink)  
Old 02-07-2013, 02:43 PM
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Quote:
Originally Posted by 1971chev View Post
How well will the summitt cam k1105 has anyone ever used this one
It will work well. It is similar to the Crane HMV278-2.
The Crane cam is a little sweeter overall.
I have used both.

Do you have valve springs that are up to the task?
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  #43 (permalink)  
Old 05-25-2013, 08:49 AM
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So finally did the longtube headers, head swap and 1.6 roller rockers and a summit k1103 cam still only made 300 rwhp I understand a little less with the smaller cam but with headers and heads still stayed the same. Am I missing something here. I checked the carb it is a 750 not a 650 which I thought it was.
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  #44 (permalink)  
Old 05-25-2013, 08:53 AM
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post the dyno graph including A/F and SFC
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  #45 (permalink)  
Old 05-25-2013, 09:00 AM
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I will have him email the graph to me on tuesday we have it a little rich
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