DYNO RESULTS 7/29/05 MRALEY 66 MUSTANG

mraley

mraley

Well-known member
OK..........Here is the official results which have been verified by the accounting firm "NevertellALie and Company"

Before we go into the numbers. This is the 3rd run over a period of about a year. This run was made to see how many horses we gained at the rear wheels by adding an Aussie Head and a Holley 350. Previously we were running a 250 Head and a Holley-Weber Progressive 2 Barrel.


Before:
Max HorsePower 119.7 @ 5100

Max Torque 143.3 @ 3100

Top Speed 120 @ 5200 RPM


After

Max Horsepower 139.8 @ 5100
Max Torque 164.7 @ 3150

Didn't to top Speed this time....

Comments Anyone??????

Personally, aside from going turbo or getting a new head from FSPP when they come out, I think I'm just about done....

This trip to the shop also included installing a new 8" rear end from a 68 Stang and I'm just about broke!!!! Michael
 
This is RWHP? Looks pretty good to me, how much does the car weigh? 2700lbs? Any chance you did a before and after 0-60mph times? I would consider myself lucky if my '68 would put down that at the rear wheels and its original factory rating was 195hp.

What sort of igntion system are you running? Do you have a header or stock exhaust manifold? Did the dyno runs indicate that you were running the correct carburator carburation? Do you have a water pump mounted fan or electric? Any other options? PS/AC? Do you know what the CR is/was for each combination? What cam profile are you running? In this age I also wonder what sort of MPG you are getting.
Maybe you have it posted somewhere but what trans are you running?

-ron
 
So far, on the dyno results we've seen, the 2V head is worth 20-30 hp, all other things remaining equal.

Considering that this exceeds the real world numbers for a "200" hp 2V V8, this is probably a really fun car to drive. I'm not surprised to see the peaks remain the same since the cam is the same. Good job!
 
That's fantastic Michael! You have one special ride there. How much difference does that extra torque actually make on the street? Can you feel much difference?
 
Ron....Yes, this is RWHP. I think the car weighs about 2900 pounds. I have never done the 0-60 times. I may try that soon. I'm running a Duraspark II Ignition and box with a recurved dizzy. This guys dyno doesn't do the carburation measurements. I do have a water pump mounted fan. It's one of those flex fans, not the original stock 4 blade. I have an aftermarket AC, but no PS. The last compression I had record of was in January. That was 9.8 to 1. I'm running a modified C-4 with a high stall convertor. I haven't had a chance to check the MPG's yet. Just got the car out of the shop yesterday....Michael
 
WhitePony....There is big difference on take off and throttle response. Also, I've noticed that the car seems to maintain speeds better than before and appears to work alot less. I think thats due to both barrels working all time verses the progressive only working at higher RPM's..Michael
 
MustangSix....The Dyno guy told me that If I would have tested on a cooler day like I did the last time in February I would have gained about 10 to 15 more HP..Does that make sense to you? If so, Would my gains have been that much different?
 
Great job Michael,

You need to change your signature now! Your engine compartment looks great. Twenty more horses at the rear wheels is a good boost. Just so you know your old head is still performing superb and I enjoy feeling the kick in the pants I get from the install every time I hit the pedal. The electronic ignition and 5200 really smoothed it out but the new head definetly woke it up. Can't wait to get the cam and header on it.

Congradulations on you project you still set the bar for overall appearance and quality of workmanship.

Bob
 
Bob...Thanks!!!! I'm glad the old head is working great for you. You mentioned the other day your top speed went from 85 to 105 or so? I noticed when Dyno was running today that he hit 3rd gear at 95 or so. He didn't check for top speed today. The 3.00 rear end seems work well in my application. I've got good take of and freeway speeds aren't really affected. Anyway, keep me posted on yours. Michael
 
Great Job Michael, very impressive. 8)

I love the air filters, looks great and adds a touch of modern style to the engine bay.
 
mraley":1faw1ui1 said:
MustangSix....The Dyno guy told me that If I would have tested on a cooler day like I did the last time in February I would have gained about 10 to 15 more HP..Does that make sense to you? If so, Would my gains have been that much different?
Click to expand...

Michael, absolutely! That's why cold air induction works so well. Cooler air is denser, and causes the fuel to atomize more efficiently. This is also seen in boating. My boat will run two to three MPH faster in the early spring or late fall than on the same lake in July.

Kris
 
Is the intake jet hotted ? and a electric fan should bring about a few more ponies aswell. Great Job!
 
Michael, the dyno #'s look great, if it is as hot in texas as in south carolina your hp will take jump in the fall or winter.

Be very satisfied with your results. Great job done.

Is your jetting in the 350 carb stock?? They come with 61 main jets.

I'm sure the car is just a pleasure to drive it probably runs as good as a 289 with a 2 barrel carb.

Keep up the good work. William
 
Michael,
Congrats on the new head. Your mech is to be comended. great job, not only does it run like a bat out of hell it looks GREAT.
talk soon
Dale
 
Nice job!!!! 8) 8) 8)

Just curious but was your previous carb mounted directely to the intake log or was it mounted to a Clifford adapter?

Thanks,

Doug
 
In real world terms, this is an excellent improvement. On the basis of percentages, you've got 15% more out of your engine at the same revs. in other words, you have the performance of a 3.8 liter engine from just a head change. Sort of like dialing up another 30 cubes via a head swap.

The 350 Holley is a very small carb. Based on the figures, that's 186 hp net at the flywheel. The stock 350 cfm carb often flows less than 200 cfm when an air cleaner is placed on it. The remote air cleaner you use is just like hitting open air. It's very rare to get the same power increase as you do torque increase. On most engines, if you get a 15% power boost, you only get a 7% torque boost. In your case, you induction is clearly delivering the goods at top end and right through the mid range. This proves that with the right kind of modern remote air cleaner, you can make the 350 Holley work like a charm.

In the past, I've never seen any documented case of more than 165 hp with a 350 Holley. (That was in 1988 on a 350 Chev dynoed by Lynx engineering in Australia). What I have seen is that this kind of arrangement was used on A-sereis Mini engines in 1985, and they produced a huge gain in mid range torque. It was called a remote air cleaner with ram tube in one of Vizards mini books. It clearly boosted the mid range, and flowed as much air as a stock carb with no air cleaner.

Top marks. People will copy your most excellent work.


Deano
 
The Dyno guy told me that If I would have tested on a cooler day like I did the last time in February I would have gained about 10 to 15 more HP..Does that make sense to you? If so, Would my gains have been that much different?
Click to expand...

i don't think it would improve THAT much. i'm pretty sure the air will heat up anyways when it reaches the engine. i think the air filter probably makes the difference.
 
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