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514 Dyno guesstimate

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Post  bbf-falcon November 26th 2014, 12:41 am

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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Post  Mark Laczo November 26th 2014, 1:07 am

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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Post  bbf-falcon November 26th 2014, 6:17 pm

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

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Post  dfree383 November 26th 2014, 10:01 pm

825-850 is my guess
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Post  bbf-falcon November 26th 2014, 10:15 pm

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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Post  rmcomprandy November 27th 2014, 12:34 am

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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Post  bbf-falcon November 27th 2014, 12:14 pm

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

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Post  butterbean November 27th 2014, 12:17 pm

well???? what did it make????
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Post  bbf-falcon November 27th 2014, 12:26 pm

It made 866@7000 and 700ft lbs torque.

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Post  butterbean November 27th 2014, 12:29 pm

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 November 27th 2014, 12:32 pm; edited 1 time in total (Reason for editing : added)
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Post  bbf-falcon November 27th 2014, 12:41 pm

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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Post  FalconEh November 27th 2014, 10:49 pm

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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Post  gmsmkr November 27th 2014, 11:32 pm

I think I could live with a combo like that Very Happy
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Post  bigblok2000ranger November 28th 2014, 1:55 am

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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Post  Tore November 29th 2014, 4:35 pm

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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Post  Mark Miller November 30th 2014, 2:12 am

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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Post  jasonf November 30th 2014, 7:03 am

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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Post  jbozzelle November 30th 2014, 10:04 pm

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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Post  Moodyblues December 1st 2014, 7:14 pm

Nice!
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