Author Topic: Help Wanted Nebulous Theorem III  (Read 16742 times)

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Offline turborick

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Help Wanted Nebulous Theorem III
« on: November 09, 2009, 12:31:40 PM »
Car 788 Nebulous Theorem III will be getting "Freshened Up" this winter and could use some help. If you would like to help in some way please give me a call or pm me. 661-618-7706 The car is located in Palmdale, Ca

Our plans for next year include turbo charging the flathead V8 that went 280mph NA this year. our goal will be in the 325 -350mph zone.
Our near future plans will be with our still under development purpose built engine that should go well into the 400mph range.


Rick Yacoucci

The new Nebulous Theorem 3.5 #788
http://www.bonnevillestreamliner.com

Offline robfrey

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Re: Help Wanted Nebulous Theorem III
« Reply #1 on: November 09, 2009, 01:40:54 PM »
I can help you sizing the turbo and testing different combinations on the simulator. We can test different camshaft and compression to see what is optimum. We can also getting timing curve that will be safe and effective. I would love to be involved. Of course everything would have to be via internet as we are in PA.
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Offline landsendlynda

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Re: Help Wanted Nebulous Theorem III
« Reply #2 on: November 09, 2009, 01:44:22 PM »
Rick,

Need a car polisher?!!   :roll:  Not much else I could do anyway!

Lynda
Volunteer roadblock at Land's End! Yes, you need your stinkin badge! I'm your Dream Keeper, I protect your dream on the asphalt so you can chase your dream on the salt!

Offline theazoldcrow

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Re: Help Wanted Nebulous Theorem III
« Reply #3 on: November 09, 2009, 05:35:47 PM »
 :-o  Lynda!  I'm curiouse as to what your car polishing technique would be!?????   (Makes my mind hurt!)  Lya.     Crow.
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Offline fredvance

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Re: Help Wanted Nebulous Theorem III
« Reply #4 on: November 09, 2009, 06:50:42 PM »
If I was a little closer I'd be there with bells on. :-D

  Fred
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Offline robfrey

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Re: Help Wanted Nebulous Theorem III
« Reply #5 on: November 09, 2009, 09:16:05 PM »
I don't know what is a good number for a turbo flathead on gasoline to make. Should of asked if is going to be gasoline. Just started messing with it.
I like the long power curve with little drop off. Should have a big gearing window.
Specs so far:
28 psi, 8:1 comp, single Garrett GT4202, icewater intercooler, 90mm throttle body, 1-5/8 headers, 3" collector
622hp @ 5000rpm, 734 lbs/ft @ 4000 with safe tune up though computer says there is a mixture / atomization problem.





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Offline maj

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Re: Help Wanted Nebulous Theorem III
« Reply #6 on: November 10, 2009, 04:11:50 PM »
Rob how do the numbers stack up with Methanol instead of Gas ?


Offline robfrey

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Re: Help Wanted Nebulous Theorem III
« Reply #7 on: November 10, 2009, 06:04:22 PM »
The meth numbers (nonintercooled) will be a little higher because the mixture can be run a little rich and cover some of the mixture problems associated with a flat head. Not a lot higher though. At least that has been my experience. I do not have a lot of experience with flatheads though.
What is good HP number for a blown flathead on gasoline to make? On fuel? Not at the dragstrip but at the salt.
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Offline turborick

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Re: Help Wanted Nebulous Theorem III
« Reply #8 on: November 10, 2009, 06:24:23 PM »
The meth numbers (nonintercooled) will be a little higher because the mixture can be run a little rich and cover some of the mixture problems associated with a flat head. Not a lot higher though. At least that has been my experience. I do not have a lot of experience with flatheads though.
What is good HP number for a blown flathead on gasoline to make? On fuel? Not at the dragstrip but at the salt.
Our NA motor made about 400hp on fuel and we reved to 7000rpm
Rick Yacoucci

The new Nebulous Theorem 3.5 #788
http://www.bonnevillestreamliner.com

Offline turborick

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Re: Help Wanted Nebulous Theorem III
« Reply #9 on: November 10, 2009, 06:25:29 PM »
Rick,

Need a car polisher?!!   :roll:  Not much else I could do anyway!

Lynda

Ok you got the polisher job :-D
Rick Yacoucci

The new Nebulous Theorem 3.5 #788
http://www.bonnevillestreamliner.com

Offline turborick

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Re: Help Wanted Nebulous Theorem III
« Reply #10 on: November 10, 2009, 06:28:46 PM »
If I was a little closer I'd be there with bells on. :-D

  Fred
Thanks Fred I know you would
Rick Yacoucci

The new Nebulous Theorem 3.5 #788
http://www.bonnevillestreamliner.com

Offline turborick

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Re: Help Wanted Nebulous Theorem III
« Reply #11 on: November 10, 2009, 06:35:53 PM »
I don't know what is a good number for a turbo flathead on gasoline to make. Should of asked if is going to be gasoline. Just started messing with it.
I like the long power curve with little drop off. Should have a big gearing window.
Specs so far:
28 psi, 8:1 comp, single Garrett GT4202, icewater intercooler, 90mm throttle body, 1-5/8 headers, 3" collector
622hp @ 5000rpm, 734 lbs/ft @ 4000 with safe tune up though computer says there is a mixture / atomization problem.







14psi, 7:1 GT4294, water/meth injection. figure about 54 lbs per minute 6600rpm
Rick Yacoucci

The new Nebulous Theorem 3.5 #788
http://www.bonnevillestreamliner.com

Offline robfrey

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Re: Help Wanted Nebulous Theorem III
« Reply #12 on: November 10, 2009, 06:43:23 PM »
Rick,
Do you want me to try those number (7:1) and 14 psi on the software?
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Offline turborick

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Re: Help Wanted Nebulous Theorem III
« Reply #13 on: November 10, 2009, 06:46:56 PM »
Rick,
Do you want me to try those number (7:1) and 14 psi on the software?
yea try it
Rick Yacoucci

The new Nebulous Theorem 3.5 #788
http://www.bonnevillestreamliner.com

Offline robfrey

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Re: Help Wanted Nebulous Theorem III
« Reply #14 on: November 16, 2009, 06:04:01 PM »
Well here what the software says.
1) does not like the 7:1 comp Best results achieved at 10:1
2) If you run it a little rich, it will take 20 psi of boost to make 630hp. Very safe timing curve.
3) Bonneville temp and elevation are a problem. The extra pressure ratio (elevation) at the turbo combined with 95 degree intake air really makes it hard to keep the thing from detonating. I have a hunch that the software is not accurately giving me the intake air temp. it does not consider how far up the intake track the injector is. Farther up the tract gives cooler intake temps.
4) Camshaft spec that you gave me via messenger were very good which surprised me as most turbo engines like a wider lobe separation. Best results were achieved with camshaft run 2 degrees retarded (intake installed at 112).
5) 600hp at 14psi can almost be achieved but not with Bonneville air.

Remember- This is not actual and I've never been real happy about the numbers that I get with alcohol. I usually try to get the best numbers that I can on race gas and intercooler and use those numbers as most of the time I witnessed them to be very close in real life.
I.E. - Most drag guys don't switch to alcohol to make more power, it's just simpler with no intercooler.






I will try to see what it will make intercooled on gas next to see if we get better numbers with Bonneville air.

Turbo is sized nicely and we are operating in a good efficiency zone.
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