903 HP 514 with iron CJ heads

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Re: 903 HP 514 with iron CJ heads

Post  Lem Evans on February 14th 2015, 8:34 pm


"I have only seen one 1000+ HP build, I think it was Blakes 580" 15:1 engine (1003 hp). It was certainly a near max effort? This still puts the iron CJ head at a HP/Cu inch advantage. Weird"

If Blake would want to get his HP per c.i.d. up it would be very easy....keep his 4.530" bore and put a 4.150" crankshaft in it and retain the same heads and intake manifold......535".




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Re: 903 HP 514 with iron CJ heads

Post  dfree383 on February 15th 2015, 12:41 am

Sheet metal Intake, 2-3 sets of headers and 2-3 cams are what Blake would need.

And a week on the dyno
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Re: 903 HP 514 with iron CJ heads

Post  rmcomprandy on February 15th 2015, 12:47 am

Lem Evans wrote:
"I have only seen one 1000+ HP build, I think it was Blakes 580" 15:1 engine (1003 hp). It was certainly a near max effort? This still puts the iron CJ head at a HP/Cu inch advantage. Weird"

If Blake would want to get his HP per c.i.d. up it would be very easy....keep his 4.530" bore and put a 4.150" crankshaft in it and retain the same heads and intake manifold......535".
 

YEP ... it's all about getting a certain amount of dense air going through the engine efficiently ... a smaller engine, passing the same amount of air at a higher RPM, (might need titanium valves though), with excellent tuning and it would become reality for sure.

Torque is a whole other story ... Wink

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Re: 903 HP 514 with iron CJ heads

Post  Lem Evans on February 15th 2015, 11:21 am

"It was certainly a near max effort?"

Max effort looks a lot like this:

1] 60mm cam
2] .937" lifters
3] Enclosed cam tunnel
4] 7/16" and 1/2" pushrods
5] .043" back cut AP steel top ring - .043" back cut napier 2nd ring - 3mm oil ring
6] Oil pan with a big kickout & dividers at #2, 3, and 4 main caps
7] Pistons with hard anodizing coating and moly-skirt coating
8] Billet crankshaft with Cleveland mains and 2.100" rod journals
9] More than one camshaft to test
10] More than one set of headers to test
11] More than one day of dyno time
12] Carb[s] bigger than the 1250 Blake had
13] Other stuff

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Re: 903 HP 514 with iron CJ heads

Post  68galaxie on February 15th 2015, 4:12 pm

Thanks Lem,

Max effort does look expensive Smile

I wish more of the details of the 903HP Iron CJ 514 were mentioned.
Just dyno sheets and camshaft info. 903 hp at 7000 rpm sounds wicked to me, much lower rpm than I had thought.

Did this one have 60mm cam, .937 lifters, cam tunnel etc..? I have no idea.
Maybe someone knows?
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Re: 903 HP 514 with iron CJ heads

Post  hookin78 on February 15th 2015, 4:31 pm

Standard diameter cam ,isky stock diameter roller lifters 7/16 pushrods , this engine doesn't really ever see over 8000 rpm ... Normally runs between 7000-8000

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Re: 903 HP 514 with iron CJ heads

Post  Mike_R_SCJ on February 16th 2015, 1:42 pm

Is that 514 running on alcohol or what kind of fuel?

This one also had a lot of intake manifold work done as well didn't it? You definitely maximized the power.

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Re: 903 HP 514 with iron CJ heads

Post  hookin78 on February 16th 2015, 1:54 pm

Runs on Q16 but it was only worth 10 Hp over vp114
I think it's absolutely against the exhaust limit , yes ... lots of manifold work

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Re: 903 HP 514 with iron CJ heads

Post  68galaxie on February 16th 2015, 5:29 pm

Are you running a modified Victor 460?
A reasonable manifold, but certainly not the best when it comes to taper, csa, and port lengths (as you probably already know along with anyone that has measured the runners).
I am guessing the TFS mafia manifold is a better starting point for a high power build.

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Re: 903 HP 514 with iron CJ heads

Post  IDT-572 on February 16th 2015, 5:30 pm

68galaxie wrote:Are you running a modified Victor 460?
A reasonable manifold, but certainly not the best when it comes to taper, csa, and port lengths (as you probably already know along with anyone that has measured the runners).
I am guessing the TFS mafia manifold is a better starting point for a high power build.


I'm fairly sure Brandon made it what it needed to be..............
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Re: 903 HP 514 with iron CJ heads

Post  68galaxie on February 16th 2015, 5:52 pm

IDT-572 wrote:
I'm fairly sure Brandon made it what it needed to be..............

Obviously he did Smile  
The HP/cu inch numbers tell the story for sure!
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Re: 903 HP 514 with iron CJ heads

Post  dfree383 on February 16th 2015, 7:56 pm

68galaxie wrote:Are you running a modified Victor 460?
A reasonable manifold, but certainly not the best when it comes to taper, csa, and port lengths (as you probably already know along with anyone that has measured the runners).
I am guessing the TFS mafia manifold is a better starting point for a high power build.


I'd be concerned about the size if the intake on the smaller engine. Might be a little large.
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Re: 903 HP 514 with iron CJ heads

Post  68galaxie on February 16th 2015, 9:31 pm

You think it would be too large on a 900+ HP 514?
I haven't had one in my hands before. No idea what port CSA's are vs the Victor.
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Re: 903 HP 514 with iron CJ heads

Post  dfree383 on February 16th 2015, 11:42 pm

68galaxie wrote:You think it would be too large on a 900+ HP 514?
I haven't had one in my hands before. No idea what port CSA's are vs the Victor.

When your shooting for the perfect combo the size is very important.
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Re: 903 HP 514 with iron CJ heads

Post  Bret Powell on February 17th 2015, 1:16 am

68galaxie wrote:It would be very interesting to actually see the extent of the modifications made to the iron CJ head.
I assume reshaped ports - brazing fill?
Combustion chamber modifications?
Valve position changes? maybe to P51 locations?

or is this all still secret stuff?

My stuff has raised ex. floors, stock valve locations, no added material in chambers, 2.275 intake and 1.72 exhaust. Intake and exhaust ports have no external(roof) fillers. I'm sure there is some power in a major chamber modification, just have not needed to look for more power that hard yet.

I've not been here much lately, I'm covered up. Thanks all for the compliments!
Bret

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Re: 903 HP 514 with iron CJ heads

Post  68galaxie on February 17th 2015, 10:13 am

Hi Brett,

Fantastic build. i certainly like to see non-typical BBF builds that work much better than the average build.
Well done!

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