514 Dyno guesstimate

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514 Dyno guesstimate

Post  bbf-falcon on Tue 25 Nov - 23:41

last winter I built a 514 short block for one of my best friends and Forum member.I won't mention his name because I didn't ask his permission too post.he might chime in,not sure.
Anyway,it was a 4.14 crank,6.8 rod,4.440 bore deal w/p51 Scj valve angle pistons.Some of the spec's I will guess at because I sent his Cam card and other info back w/engine. He had a set of p51 heads w/2.300 1.76 stainless valves. Sent them too one of the best head guy's around and had the porting and vj done.They averaged 438 int. at 750 and 440 at 800. and 265 on the ext. side. I'm thinking the cam lift was in the 768 range w/seems like 112 lsa. 15.1 comp.Could stand a lot more Cam imo. Mafia intake also ported by same guy. The biggest carb he had was 1250 w/99 jets and it wanted more he said but that as big as he had. What HP do you guy's think it made on the Dyno @ 7000. I haven't seen the sheet,as he didn't have it w/him when he called me tonight.

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514 dyno

Post  Mark Laczo on Wed 26 Nov - 0:07

Without knowing .050" numbers I would say somewhere north of 900ish ??
That's really good flow on those P51's about 15-20 more than some others.
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Re: 514 Dyno guesstimate

Post  bbf-falcon on Wed 26 Nov - 17:17

Duration @.050 int.270 exh. 280
110 centerline
Lift .785int.  .760ext.

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Re: 514 Dyno guesstimate

Post  dfree383 on Wed 26 Nov - 21:01

825-850 is my guess
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Re: 514 Dyno guesstimate

Post  bbf-falcon on Wed 26 Nov - 21:15

The reason the cam is so small is it was speced a few years back when the heads were stock.it will def pickup w/new cam speced for the new head flow. Dave, my guess was close to yours just before it went to dyno.My guess was 870 and the owner said he would be happy with 850.

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Re: 514 Dyno guesstimate

Post  rmcomprandy on Wed 26 Nov - 23:34

bbf-falcon wrote:The reason the cam is so small is it was speced a few years back when the heads were stock.it will def pickup w/new cam speced for the new head flow. Dave, my guess was close to yours just before it went to dyno.My guess was 870 and the owner said he would be happy with 850.

With a 514, unless it has titanium intake valves and can easily rev higher, a bigger cam won't add much horsepower at all. Maybe 10 or so but. it would lose at least twice as much torque.

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Re: 514 Dyno guesstimate

Post  bbf-falcon on Thu 27 Nov - 11:14

Thx Randy, that's why I leave the cam design to the pro's.

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Re: 514 Dyno guesstimate

Post  butterbean on Thu 27 Nov - 11:17

well???? what did it make????
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Re: 514 Dyno guesstimate

Post  bbf-falcon on Thu 27 Nov - 11:26

It made 866@7000 and 700ft lbs torque.

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Re: 514 Dyno guesstimate

Post  butterbean on Thu 27 Nov - 11:29

DAMN, I need that combo in my T-Bird, it would make 1 fast bracket car with big MPH!!!  hell I'm hoping for 700 wimpy azz HP


Last edited by butterbean on Thu 27 Nov - 11:32; edited 1 time in total (Reason for editing : added)
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Re: 514 Dyno guesstimate

Post  bbf-falcon on Thu 27 Nov - 11:41

Owner sent me the dyno sheet and head flow sheet, if I can figure out how to post them from this tablet. Rolling Eyes

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Re: 514 Dyno guesstimate

Post  FalconEh on Thu 27 Nov - 21:49

bbf-falcon wrote:Owner sent me the dyno sheet and head flow sheet, if I can figure out how to post them from this tablet. Rolling Eyes

we will be waiting Very Happy bounce

Guesetimate hell you guys had the coconut calculators running dyno passes spot on cheers
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Re: 514 Dyno guesstimate

Post  gmsmkr on Thu 27 Nov - 22:32

I think I could live with a combo like that Very Happy
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Re: 514 Dyno guesstimate

Post  bigblok2000ranger on Fri 28 Nov - 0:55

bbf-falcon wrote:Duration @.050 int.270 exh. 280
110 centerline
Lift .785int.  .760ext.

rmcomprandy wrote:
bbf-falcon wrote:The reason the cam is so small is it was speced a few years back when the heads were stock.it will def pickup w/new cam speced for the new head flow. Dave, my guess was close to yours just before it went to dyno.My guess was 870 and the owner said he would be happy with 850.

With a 514, unless it has titanium intake valves and can easily rev higher, a bigger cam won't add much horsepower at all. Maybe 10 or so but. it would lose at least twice as much torque.

With the flow numbers posted would it not have more power with cam specs similar to 270*@.050" .785"/285*@.050" .800" lift?
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Re: 514 Dyno guesstimate

Post  Tore on Sat 29 Nov - 15:35

I sent the results to Rick and he can't post them and I don't know how. If I send the dyno sheet out can someone post it up?


Thanks Tore
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Re: 514 Dyno guesstimate

Post  Mark Miller on Sun 30 Nov - 1:12

bbf-falcon wrote:It made 866@7000 and 700ft lbs torque.

Rick,nice job if it ran on 93 octane pump gas that would be a nice engine for my Mustang. Very Happy Very Happy Very Happy

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Re: 514 Dyno guesstimate

Post  jasonf on Sun 30 Nov - 6:03

If you don't have a scanner just take a picture of the sheet and post it like any other picture.
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Re: 514 Dyno guesstimate

Post  jbozzelle on Sun 30 Nov - 21:04

Good to hear. I have the same shortblock with out the box P51s and mafia intake... looks like I have some good stuff to grow into...

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Re: 514 Dyno guesstimate

Post  Moodyblues on Mon 1 Dec - 18:14

Nice!
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