New born P51 engine

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Re: New born P51 engine

Post  68formalGT on November 17th 2015, 4:36 pm

Lem Evans wrote:17 better than VP113

It busted 1,000 w/o the Q.



I kinda thought it would have gone more then 17 with Q?
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Re: New born P51 engine

Post  IDT-572 on November 17th 2015, 4:37 pm

I think it was base lined on 113 it's oxygenated too.
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Re: New born P51 engine

Post  IDT-572 on November 17th 2015, 4:38 pm

IDT-572 wrote:I think it was base lined on 113 it's oxygenated too.

That's still a very good pick up.............
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Re: New born P51 engine

Post  dfree383 on November 17th 2015, 4:41 pm

IDT-572 wrote:
IDT-572 wrote:I think it was base lined on 113 it's oxygenated too.

That's still a very good pick up.............

Q651 Very Happy
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Re: New born P51 engine

Post  Lem Evans on November 17th 2015, 4:53 pm

IDT-572 wrote:I think it was base lined on 113 it's oxygenated too.

Correct...that was going to be my 1st observation.

The 2nd is that there was no tuning on Q16, just one pull to get some heat back in the oil and the 'power' pull that I posted.
The A/F read out died toward the end of the 113 session...so...there is no way to know if Phillip's educated guess on the jet up for the Q was perfect or merely darn close. At any rate we'll never know if there were a few more there are not. In my opinion it really didn't matter any way.....it was a fruitful day and time to go home Very Happy

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Re: New born P51 engine

Post  68formalGT on November 17th 2015, 4:55 pm

How much more jet from the 113 to the Q.
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Re: New born P51 engine

Post  IDT-572 on November 17th 2015, 4:56 pm

I would say Phillip didn't miss the jetting enough to make another change................. lol
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Re: New born P51 engine

Post  Lem Evans on November 17th 2015, 4:57 pm

68formalGT wrote:How much more jet from the 113 to the Q.

I didn't ask.

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Re: New born P51 engine

Post  68formalGT on November 17th 2015, 5:16 pm

Lem Evans wrote:
68formalGT wrote:How much more jet from the 113 to the Q.

I didn't ask.


Thanks Lem.
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Re: New born P51 engine

Post  Lem Evans on November 17th 2015, 5:16 pm

68formalGT wrote:
Lem Evans wrote:
68formalGT wrote:How much more jet from the 113 to the Q.

I didn't ask.


Thanks Lem.

I will ask if you wish.

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Re: New born P51 engine

Post  68formalGT on November 17th 2015, 6:00 pm

Lem Evans wrote:
68formalGT wrote:
Lem Evans wrote:
68formalGT wrote:How much more jet from the 113 to the Q.

I didn't ask.


Thanks Lem.

I will ask if you wish.

I was curious as we have had quiet a few guys running 113 in the past and switched to Q16. While 17 horse is a really good increase I was wondering how much more Q was needed to get that difference?
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Re: New born P51 engine

Post  Lem Evans on November 17th 2015, 6:15 pm

68formalGT wrote:
Lem Evans wrote:
68formalGT wrote:
Lem Evans wrote:
68formalGT wrote:How much more jet from the 113 to the Q.

I didn't ask.


Thanks Lem.

I will ask if you wish.

I was curious as we have had quiet a few guys running 113 in the past and switched to Q16. While 17 horse is a really good increase I was wondering how much more Q was needed to get that difference?

Don't get too caught up in the peak HP # when you are considering the performance value of Q vs 113. What Q does to the tq and hp curve is massive.
The Q made more power at 6,400 rpm than the 113 did at 7,000 rpm.

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Re: New born P51 engine

Post  68formalGT on November 17th 2015, 7:15 pm

Lem Evans wrote:Don't get too caught up in the peak HP # when you are considering the performance value of Q vs 113. What Q does to the tq and hp curve is massive.
The Q made more power at 6,400 rpm than the 113 did at 7,000 rpm.

Does that usually happen with all the builds you try Q with?
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Re: New born P51 engine

Post  Lem Evans on November 18th 2015, 11:29 am

68formalGT wrote:
Lem Evans wrote:Don't get too caught up in the peak HP # when you are considering the performance value of Q vs 113. What Q does to the tq and hp curve is massive.
The Q made more power at 6,400 rpm than the 113 did at 7,000 rpm.

Does that usually happen with all the builds you try Q with?

Yes, it's usual.

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Re: New born P51 engine

Post  68formalGT on November 18th 2015, 11:39 am

With all the new fuels out is Q still the leader for N/A high compression, carbureted engines?
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Re: New born P51 engine

Post  Lem Evans on November 18th 2015, 11:51 am

68formalGT wrote:With all the new fuels out is Q still the leader for N/A high compression, carbureted engines?

There is some other voodoo stuff out there that's said to make more power but, you get into price and availability issues plus the feed back I've gotten indicates that the Q is much more forgiving relative to the tune up window.

Q16 is where I'd personally want to be.

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Re: New born P51 engine

Post  68formalGT on November 18th 2015, 12:37 pm

Lem Evans wrote:
68formalGT wrote:With all the new fuels out is Q still the leader for N/A high compression, carbureted engines?

There is some other voodoo stuff out there that's said to make more power but, you get into price and availability issues plus the feed back I've gotten indicates that the Q is much more forgiving relative to the tune up window.

Q16 is where I'd personally want to be.

Thanks Lem, that's good to know. We don't get a lot of discussion on fuels here.
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Re: New born P51 engine

Post  Lem Evans on November 18th 2015, 8:03 pm

Another observation about the Q16 pull:

The last 10 data points were 6,300 through 7,200 rpm......average HP in that range = 1,014.

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Re: New born P51 engine

Post  jones on November 18th 2015, 10:20 pm

Thats cool!

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Re: New born P51 engine

Post  68formalGT on November 18th 2015, 11:06 pm

Lem Evans wrote:Another observation about the Q16 pull:

The last 10 data points were 6,300 through 7,200 rpm......average HP in that range = 1,014.

That's pretty awesome!!
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Re: New born P51 engine

Post  bbf-falcon on November 18th 2015, 11:39 pm

Very nice Lem,congrats to all involved. Although it probably wouldn't have happened w/o Fabio's input. Razz

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Re: New born P51 engine

Post  Lem Evans on November 19th 2015, 8:18 pm

bbf-falcon wrote:Very nice Lem,congrats to all involved. Although it probably wouldn't have happened w/o Fabio's input. Razz

Be nice....Fabio can always be counted on for some immoral support Laughing

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Re: New born P51 engine

Post  Lem Evans on December 6th 2015, 8:23 pm

68formalGT wrote:
Lem Evans wrote:17 better than VP113

It busted 1,000 w/o the Q.



I kinda thought it would have gone more then 17 with Q?

Here is the missing part of that deal. If the package was designed to run a steady diet of Q16 rather than 113 fuel, it'd had a compression ratio of 15/1 or better rather than less than 14/1.
Maybe that's the extra power you were looking for?

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Re: New born P51 engine

Post  psfracer on December 31st 2015, 6:45 pm

Wow that is really stout, beat my build by almost 100 hp. I had stock P51 heads but more compression. But I did pick up a lot at the track (3/10ths) once the heads were ported by Charlie and titanium intake valves were added. This is the highest hp P51 deal that I have seen.
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