Dyno day tomorrow!

[firefighter3931]

Well said Jeff  

When Frank asked for a recipe for his street motor it was built around a set of parameters and budget. He wanted something that would work with 3.23 gears and a mild converter as well as using the stock heads so that's what the parts selection was based on.   With a mild build the emphisas should be on low end power and torque....especially with a heavy car and 3.23 gears.   One look at Jackson's video and you can see what the proper recipe can do....he boils the tires with a 383 that's very similar to Franks but has 60 cubes less. What do you think is going to happen when Big Lion drops the hammer  

As for dynos ; i've seen some that read high and some that read low. It's simply a tool to measure changes and optomize the tune. The numbers can be manipulated to say whatever you want them to (correction factor) and calibration comes into play.  

I'd say that Frank did a great job on his first build. If he wants more power it's just a head & cam swap away from 500HP. Of course that would require a different tq converter and deeper gears to work well together. Heck, just a head swap alone would pick up 50hp and not affect drivability with the current gearing/converter.  



Ron

[jb666]

Exactly... I agree... Frank considered a cam swap while at the shop yesterday, but like he said "When will it end??". I can answer that (as I'm sure most can)... NEVER. I got obsessed with my #'s and finally had to say enough is enough...

He's got a killer stout build. Very streetable. VERY drivable. The car is going to go like a champ. Plus, he's got no fear. He'll rip into that again, I'm sure, some weekend when he gets the itch.. I admire that. I lost my nerve with that stuff years ago... Now I pay others (like YOU) to do it.

I told him yesterday that I can't wait for his first road trip so I can hear that beast run...

[FLG]

Thanks Ron!!

Thank you Jeff for hooking me up.

And thank you Brian who recommended the guy that did the machine work, and to everyone else who helped me with my questions and GP who just likes razzin me.

And Jeff you right, i sat there and said "Where do i stop?" im going to use this engine and enjoy it, i WILL build a 572 down the road when the time comes and thats where i can make the numbers i want to make. Now im going to have fun and enjoy the car (once its back together LOL)


Its not my oil pressure that im concerned about, just simply wasting hp for oil pressure that i dont really need. What do you think?

Heres a pic of one of the sheets



The torque is higher up below 3700, from 3k its still well into 400+ ft/lbs i cant seem to find where i put the sheet but the fact is that this car is going to boil the rears on the street with that low end torque.

[firefighter3931]

Frank, don't worry about wasting HP with a little extra oil pressure. We're talking minimal gains here with lighter oil...maybe 5hp ? I'd prefer to have rock solid oil pressure ane err on the side of caution. Once you start driving it on the street and it warms up to operating temps the "warm" pressure will settle down. All my motors have 75-80 psi cold  This is a street motor that will see extended driving time, not a race motor that warms up, makes a pass then cools down in the pits. 

I'm wondering about the A/F data....i'd be curious to see what those numbers look like. That info isn't on your sheet...

There's usually a bit of power to be found with the ignition curve. I see that they had the total at 34* and iron headed builds like 38* or so. Were all the pulls made at 34* ? Did they try different total advance settings ?

I'm glad to see the tq peak below 3700 because that will make it more user friendly for your needs with 3.23 gearing and mild stall. 

The HP numbers hold on well up top which is what you want....a flat power curve at peak. You'll be shifting at 5500-5800 anyway so it should pull strong right up to the shiftpoint and be in the meat of the tq curve at the upshift. 

What headers are you planning to use ? What exhaust ?


Ron

[FLG]

We tried at 38 and after looking at the plugs he decided to back it down some, again im going to work out the tweaks on the chassis dyno i just want to be able to put it in and drive there without worries

Heres the A/F data from the Dyno, he said its not exactly perfect and uses a separate computer and program for measuring the A/F ratio which for some reason he couldnt print the data off of it.





Im using hedman 1 3/4 headers and i was planning on going with a 3" X-Pipe TTI exhaust just to ensure i dont need to change over again when i build a bigger motor, but i am afraid thats going to be too big and hurt it some.

[FLG]

Videos

http://www.youtube.com/watch?v=5nyOOwvEAjs

http://www.youtube.com/watch?v=ntM6N4HSvUY

[TUFCAT]

Wow...nice build. I'm excited for ya!

[68X426]

Great thread, thank you guys for posting and sharing observations.

[jb666]

Videos

http://www.youtube.com/watch?v=5nyOOwvEAjs

http://www.youtube.com/watch?v=ntM6N4HSvUY

Very clear videos.. Motor sounds GREAT! I got a kick out of it when his finger got stuck on your throttle..OOPS!

Sounds GREAT, Frank!!!!!!!!!!!!!!!!!!!!!!

Hey Frank... The view looks familiar!

http://www.youtube.com/watch?v=E4u3Mxbu8yA

[Just 6T9 CHGR]

You will be very happy on the street with that cam.  I know I am
When I put my motor together, I was nervous as heck....double, quadruple checking everything!  Well worth the satisfaction in the end

I also agree with Ron on the oil psi thing....dont sweat it.  I run 20/50 VR1 oil & cold its about 75 psi @ idle....when hot its around 30-40 psi.  id rather have better psi then 3 hp

[firefighter3931]

We tried at 38 and after looking at the plugs he decided to back it down some, again im going to work out the tweaks on the chassis dyno i just want to be able to put it in and drive there without worries

Heres the A/F data from the Dyno, he said its not exactly perfect and uses a separate computer and program for measuring the A/F ratio which for some reason he couldnt print the data off of it.





Im using hedman 1 3/4 headers and i was planning on going with a 3" X-Pipe TTI exhaust just to ensure i dont need to change over again when i build a bigger motor, but i am afraid thats going to be too big and hurt it some.

Good call on the headers. The 3in x-pipe is also a good choice....X-pipes increase help with scavenging which increases power....usually 10-15hp/tq 

I'm wondering what he saw on the plugs that concerned him ? Possible detonation ?

The A/F ratios looks good but you might have to jet down slightly when it's on the chassis dyno with the inclusion of an aircleaner and full exhaust so bring your jet kit when that time comes. 

Frank, have you picked out a tq converter yet ?



Ron

[FLG]

Thanks!

Yes I believe he said he saw some specs on the plugs and we also gained some when the timing was lowered.

Can't wait for the car to be done now!