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Discussion Starter #1
Do you want to take a guess for me on how much HP my engine will make? It won't be run on the dyno so your guess won't be varified.

468 BBC Mark IV, stock stroke, .060 over, 13.25:1 compression, Pro Comp aluminum 320cc intake runner heads (2.3 intake, 1.88 exhaust), full roller, .714/.714 lift, 272/278 duration at .050, 110 centerline, dry Borla upswept style headers, Mallory mag II, and for now :p a dual plane intake with a spacer and a 850 Holley.

Eventually my MFI after it's been professionaly flowed will be used. The guy that built it said about 620 HP with my intake and carb and about 650 HP with my MFI. A different engine builder told me around 750 HP with either intake.

Anyone want to take a guess?
 

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I would be VERY surprised if that engine makes 750hp with that manifold. Especialy with the type of RPM typicaly required to make that type of HP with that small of CI. The cam is pointing to higher rpm also so I would guess the manifold is one of the big killers right now.
Unported heads???
My guess, 600-650hp at best depending on dyno/correction factor used. :)sphss
 

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Sounds like a pretty nice combination except for the dual plane manifold!! Choker!!
 

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Resident Ford Nut
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Do you have flow #'s on the heads and what type of dual plane. I hope it is at least an RPM-Air Gap.

Sleeper CP :D
 

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Discussion Starter #6
Flow Numbers
Intake Exhaust
.100 74.3 .100 62
.200 166.11 .200 118
.300 245.36 .300 160
.400 308.05 .400 195
.500 339.84 .500 229
.600 360.43 .600 248
.700 374.31 .700 265



Intake Runner 320cc
Exhaust Runner 150cc
Combustion Chamber 115cc

The intake is an old C427X Edelbrock, it's a stepping stone until my MFI stack system is flowed ($$$). I'd say the C427X is most similar to a Edelbrock Performer RPM (non-air gap).
 

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Cantard
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Flow Numbers
Intake Exhaust
.100 74.3 .100 62
.200 166.11 .200 118
.300 245.36 .300 160
.400 308.05 .400 195
.500 339.84 .500 229
.600 360.43 .600 248
.700 374.31 .700 265



Intake Runner 320cc
Exhaust Runner 150cc
Combustion Chamber 115cc

The intake is an old C427X Edelbrock, it's a stepping stone until my MFI stack system is flowed ($$$). I'd say the C427X is most similar to a Edelbrock Performer RPM (non-air gap).
I take my 680 back, 650max Put a real intake and a 1050 and I bet you see about 725-740. BTW Wilson has them in stock.
 

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600hp with that intake,but i bet it will alot of torque and jets like that,nice combo good luck:)devil
 

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Resident Ford Nut
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With those flow numbers with a Victor Jr. and a 1050 Dominator I would think 730-750 is possible( I'd play it safe and would say 740+/- 10) But with that intake on it I'd say take 60-80 hp off of 740, so maybe 670 and that is on the high side. That manifold is going to want to give up at 5,800-6,000 and the cam is going to want to go to 7,000.
Be happy if you get 650 out of it with that manifold.

When will it hit the dyno ?

Sleeper CP :D
 

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Cantard
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With those flow numbers with a Victor Jr. and a 1050 Dominator I would think 730-750 is possible( I'd play it safe and would say 740+/- 10) But with that intake on it I'd say take 60-80 hp off of 740, so maybe 670 and that is on the high side. That manifold is going to want to give up at 5,800-6,000 and the cam is going to want to go to 7,000.
Be happy if you get 650 out of it with that manifold.

When will it hit the dyno ?

Sleeper CP :D
st did one with a little more stick in it and it made 750. 1050 and victor intake. Guy wouldnt spring for the wilson but they are normaly good for atleast 15-20
 

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Discussion Starter #11
... When will it hit the dyno ?

Sleeper CP :D
Probably never. I don't know what the current impellor is that's in it but I have a C cut impellor waiting for the project. Maybe the C and a impellor chart will get me a close approximation.

I know that intake is going to choke the crap out of it, but I'd rather spend the pennies on getting the MFI flowed rather than a better carb/intake setup.
 

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Resident Ford Nut
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Probably never. I don't know what the current impellor is that's in it but I have a C cut impellor waiting for the project. Maybe the C and a impellor chart will get me a close approximation.

.
I should have read the first post twice....:)sphss I would have known that. :)bulb

But you might want to check at Ed Hale's for the cost of a break in and 4-6 pulls ? I might be worth it.

Sleeper CP :D
 

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Cantard
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Probably never. I don't know what the current impellor is that's in it but I have a C cut impellor waiting for the project. Maybe the C and a impellor chart will get me a close approximation.

I know that intake is going to choke the crap out of it, but I'd rather spend the pennies on getting the MFI flowed rather than a better carb/intake setup.
Please dont think I am knocking your project. It sould be a fun and happy motor.:))THumbsUp
 

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any port work on the intake manifold ?
is the divider cut down ?
run a 2 in spacer cut down the divider one inch.


anyone know if joe sherman still sells dyno time ?
used to be around 400 bucks a day.
he ain't far from el cajon.

Yes on the 2 inch on the dual plane. Yes, get rid of the dual plane yesterday.

Yes, as far as I heard, JS is still working but he calls it semi-retirement. Therefore not around all the time, but still a lot of the time.

No, on guess of hp.
 

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Discussion Starter #16
any port work on the intake manifold ?
is the divider cut down ?
run a 2 in spacer cut down the divider one inch.

1.49 per ci.....close to 700 on alcohol...w 42 deg. .

are you going to run E-85 ?

110 lc ? what are the opening and closing numbers ?
that will determine the cylinder pressure and ve... and bsfc.


will probably idle at 1600 rpm.
i'de advance the cam just until the cranking compression drops off.then go back.
my guess...and only a guess...
close to 700 hp ....625 or so ft lbs.

i don't have any software to plug it into right now.
that is an alcohol set up.. or E-85 set up...for sure.
it takes roughly..1.5 more fuel .. so you need that much more cam and cylinder head flow..anyone else catch this ?

should make the power dripping wet too...


this just a guess.

your being sneaky.
hey.. how come my eyes are burning ?
that thing ain't a two stroke ?
something smells funny ?


anyone know if joe sherman still sells dyno time ?
used to be around 400 bucks a day.
he ain't far from el cajon.
The intake is stock and has the divider cut down about an inch in the middle of the divider for about 3 inches.

110 race gasoline while I'm running the carb. I keep flip flopping my decision on the fuel of choice when I run the MFI (still).

Cam timing tappet @ .0205
Intake opens @ 45 BTDC, closes @ 79 ABDC, Adv Duration 304
Exhaust opens @ 88 BBDC, closes @ 42 ATDC, Adv Duration 310

Cam timing tappet @ .050
Intake opens 30 BTDC, closes 62 ABDC, Max lift 105., 272.0
Exhaust opens 73 BBDC, closes 25 ATDC, Max lift 115, 278.0

Is that Cotton Candy I smell?
 

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Discussion Starter #17
... But you might want to check at Ed Hale's for the cost of a break in and 4-6 pulls ? It might be worth it.

Sleeper CP :D
I'm going to check on that. Maybe it'll be worth not taking 1 river trip and spending the cash instead on a dyno. ? I have no idea how that works, who runs what, who tunes/changes what, etc...? I also don't know if it would be better to dyno it with the carb at break in or later on with the MFI. ? I'll call them tomorrow.
 

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Rod where do you think your combo will make peak hp and torque? I think a c" impeller sounds good, but then again I don't know shit?
 

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Discussion Starter #19
Rod where do you think your combo will make peak hp and torque? I think a c" impeller sounds good, but then again I don't know shit?
I don't know sh!t either. The cam is for 3800 - 7400 (I think) and from talking to other jet drive owners I'm hoping the WOT RPM's will be around 7200 -7400.
 

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Cantard
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I don't know sh!t either. The cam is for 3800 - 7400 (I think) and from talking to other jet drive owners I'm hoping the WOT RPM's will be around 7200 -7400.
Dynoed a motor like yours a couple weeks ago. I will take a pic and post the sheet when I get a chance to give you an idea.
 
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