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Discussion Starter #1
im still in the process of biulding my new engine.

it should make about 550hp and about the same amount of tourqe but i still want more power out of it.

Who is willing to share there secreats about there engines or engine combinations to make the power over 600

So far ive got a - 408 strocker kit(maybe a 416 gotta check)
- Edelbrock Super Victor Intake Manifolds flowed at 600hp
- Edelbrock Victor Series Race Cylinder Heads
- 1000cfm TB, gonna connect it to Wolf and put some injectors in it

i was gona supercharge it but the cost factor was an issue.
 

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frdpwr, the flow figures edelbrock claim on those heads are fairly optimistic. have them flowed.

you will need an inlet/exhaust ratio of over 70 percent.

Street use, mechanical roller 262/[email protected] (watch the opening ramp) and depending on final flow figures, around 650" at the valve.

Mobil synergy 8000 fuel, 10.5:1 you will make a "soft" 600.

watch those corner cylinders, if using motec trim as required, plug tuning then.

should see a broad torque curve, peak around 510-530 ft lb and it will be around 4000-4400.

Power will peak around 6500-6800.

Regards

Chris
 

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Discussion Starter #3
i had the heads flowed, out of the box the flowed at 575 had abit of work done to them and they flowed at about 600.

and of course it has to be pump fuel
 

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Discussion Starter #5
Racer said:
I would have thought Victor's would had flowed more than that?

ps
How could you not know if it is a 408 or 416 if you've just bought it?
i wish they flowed more then that

i assumed i brought a 408 from what i remember but i was lookin at the ad i brought the bottom end from and it said 416, so ive just gotta call the guy and check
 

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Discussion Starter #6
im thinking of changin me heads and manifold
im looking at getting the Blue Thunder which comes in either 50cc or 70cc flows 360 & 270 cfm out of the box @ 28" this is approximatley 750hp, with a full competition port job these heads will flow over 420cfm (which is over 800 hp flow intake) & 310 cfm exhaust, these figures are @ 28" also, This cylinder head is the highest flowing small block Ford head available today and a manifild to suit
has anyone used these heads before???
 

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methanol injected clevo
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My XR8 sprint 5 speed is a unopened motor with 130,000kms on it.. K&N, Advanced timing by 4 degrees, pacemakers, 2 1/2" exhaust at the diff, good leads, plugs etc. - 225hp atw. 14.10 @ 97mph with bald Khumos

My XD is a 351C standard stroke
4V heads with toungues (heavily ported)
TFC manifold (ported)
BG Gold claw (alcohol)
SRP forged alloy pistons
Eagle ESP H-beam forged rods
4MA crank (prepped)
Black XE Block grout filled
Big custom grind billet cam - appox 700 thou lift

http://www.hotperthcars.net/Summoner/images/XXX-XX-XX%20-%20misc%20pics/shanes%20pics/carbmanifold.JPG
http://www.hotperthcars.net/Nitrane/cars/xd351/painted/IMG_3053.JPG
http://www.hotperthcars.net/Nitrane/cars/xd351/painted/IMG_3034.JPG

I've been told to expect between 600-650hp. I'm HOPING to get into the 10's with full interior etc. The car will be registered and i might risk bringing her out every now and then until the boys in blue intervien.

Build time has been since June 2002, i'm hoping to fire her up within the next month
 

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BLOWNXD
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frdpwr said:
im still in the process of biulding my new engine.

it should make about 550hp and about the same amount of tourqe but i still want more power out of it.

Who is willing to share there secreats about there engines or engine combinations to make the power over 600

So far ive got a - 408 strocker kit(maybe a 416 gotta check)
- Edelbrock Super Victor Intake Manifolds flowed at 600hp
- Edelbrock Victor Series Race Cylinder Heads
- 1000cfm TB, gonna connect it to Wolf and put some injectors in it

i was gona supercharge it but the cost factor was an issue.
hey Frdpwr im currently running a 408 cubed windsor with the 3v heads ive had them ported and polished and they flowed 700HP at 680though of lift, with ferrea valves and valve springs, crane roller rockers, 11.1 compression(alloys tolerate more comp ie... 11.1 with alloy heads = 10.1 with casts), TFC manifold and BG 1000cfm carby, Comp cams solid roller camshaft (keep in mind a wild roller cam in a standard stroke 351 is a mild cam in a 408+) with 670though lift and 248/254 duration (which is small even for a 351) has produced 460 rwhp and estimated by the chasis dyno to be 530rwtq on pump fuel, the thing goes from basicaly 0- 460 in 700revs (5700-6400) when properly run in, tuned and running on avgas should get closer to 480rwhp, which would be close to 600+ Fwhp and the best part is, is that because of the relatively low compression i can still run U98 fuel and even premium unleaded without pinging, it never runs hot( half the time the thermos never even need to be turned on) and the size of the cam being pretty small its completely driveable and reliable i let my Mrs drive it with the baby seat in the back with my 5 yr old daughter in it. Its a true streetcar, with the cubic size of your engine a massive cam and compression isnt needed :)
 

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frdpwr said:
Who is willing to share there secreats about there engines or engine combinations to make the power over 600
There is no secret in getting 95% out of your motor - the secret (and cost) is in that last 5% - which is what wins or loses you races.

Bacically
More revs = more HP
More comp = more HP
etc...etc.....etc...

Rev your 16:1 compression 418 to 8,000, and you will make more power than your 10:1 compression 418 revving to 6,000
 

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BLOWNXD
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Racer said:
There is no secret in getting 95% out of your motor - the secret (and cost) is in that last 5% - which is what wins or loses you races.

Bacically
More revs = more HP
More comp = more HP
etc...etc.....etc...

Rev your 16:1 compression 418 to 8,000, and you will make more power than your 10:1 compression 418 revving to 6,000
I agree to but at a cost even with a mild 408-420 with any sort of roller cam the more the lift and duration the more often ull be replacing valve springs, and lifters at $500-$800 for valve springs and similar dollars for lifters do u really want to be forkin that out every 10,000kms, and the higher it revs again the more strain on your valve train and more costs. The higher the compression the higher octane fuel u have to use with 16.1 avgas wont do, and the fuels that will, will cost u over 3$ closer to $5 a litre (C16) **** that unless you go methanol and as far as i know its not legal for street use, but i guess at the end of the day it depends what you want an all out balltearer of a drag car which youve got at least 3-5k a year to up keep plus fuel or a streetable 600hp engine that runs on pump fuel and still doesnt mind being cruised which you should easily be able to achieve with that size engine.
 

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I don't get much of this. You have a pushrod with 2 valves per pot, 408 cu in, about 6500 rpm peak, a cam, an exhaust so you'll be pushing about 0.415kg/sec of air to get 350kW @ peak revs. That presupposes you have a decent sized throttle body (eg 100mm or dual 68mm), intake ports of about 2400mm^2 and exhaust ports of about 2050mm^2, and failry minor pumping losses.

So how do you expect to get 410kW out of an aesthmatic engine, with poor volumetric efficiency, presumably heads designed for low swirl, on pump fuel?
 

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frdpwr said:
im thinking of changin me heads and manifold
im looking at getting the Blue Thunder which comes in either 50cc or 70cc flows 360 & 270 cfm out of the box @ 28" this is approximatley 750hp, with a full competition port job these heads will flow over 420cfm (which is over 800 hp flow intake) & 310 cfm exhaust, these figures are @ 28" also, This cylinder head is the highest flowing small block Ford head available today and a manifild to suit
has anyone used these heads before???
The heads you speak of are closer to a Ford SC1 in configuration.
Suiting Drag, Sprint car, circuit boat etc.

Avoid them for your application.
 

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Discussion Starter #15
im gona keep my orignal setup with the 416.
money has became abit of an issue with buying bigger heads, cam etc etc

EB 5.6 said:
The heads you speak of are closer to a Ford SC1 in configuration.
Suiting Drag, Sprint car, circuit boat etc.

Avoid them for your application.
 

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methanol injected clevo
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xpc66 said:
I don't get much of this. You have a pushrod with 2 valves per pot, 408 cu in, about 6500 rpm peak, a cam, an exhaust so you'll be pushing about 0.415kg/sec of air to get 350kW @ peak revs. That presupposes you have a decent sized throttle body (eg 100mm or dual 68mm), intake ports of about 2400mm^2 and exhaust ports of about 2050mm^2, and failry minor pumping losses.

So how do you expect to get 410kW out of an aesthmatic engine, with poor volumetric efficiency, presumably heads designed for low swirl, on pump fuel?
a) i've seen the motor rev to 7600 on the dyno
b) it's a 1000cfm BG carb
c) i would hardly call a 408W with ported 3Vs, Ferrea valves, TFC manifold, BG 1000cfm carb, 630+ thou roller cammed engine as being aesthmatic.

I have seen this engine on the dyno untuned pull 455rwhp on U98. I'm not going to get into a number war, but i think this donk has a bit more mumbo than what you think it has.

PS. i cant wait to tell you guys how mine goes... engine is out of the hottank and hopefully we'll have a fireup within the month :)


 

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Discussion Starter #18
let us know how much power your engine makes

mine should be ready in about 3weeks cant wait to see how much power it makes


xr8_sprint said:
PS. i cant wait to tell you guys how mine goes... engine is out of the hottank and hopefully we'll have a fireup within the month :)


 

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methanol injected clevo
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apologies, that's XD408's motor.

mine is a 357C cleveland, 4V heads, roller cam, TFC manifold, BG 825 Gold Claw alcohol, SRP forgies, H-beam forgies.... aiming for 600hp @ the motor *fingers crossed*
 
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