Hemi 426ci

[Welshbeef]

Does anyone know what a crate engine is pushing out on these? And how much did they make in the 70's?

Finally does anyone really mod these engines with turbos for road use or is the n/a power more than plenty? Or is it big supercharger just to make sure there is enough low end torque.

V8 biggest and best

[iain_thornton]

back in the day, they were rated at 425hp
real figure thought to be around 450hp

torque also varied, I imagine 490 lb ft

with superchargers you can be talking 800hp or more. top fuel, a couple of thousand

no idea what a modern crate is pushing out, depends on the spec you order, I imagine

[Welshbeef]

Amazing 490ftlb with similar power lovely.

How easy is it to buy a super modified car with a hemi in the uk for road use totally road legal with all the creature comforts but the big boy up front with I guess quad webbers or is there another option?
Is carb the better for noise or is it fuel injection.

[Welshbeef]

Wow just seeen a hemi crate site and they offer
426
472
528
540ci
holy st as they say bigger is better aparently the 540cubic inch can easily be made to produce 900hp for pro street racing. Also the price doesn't seem too bad - makes you think why do kids spend £30k on a saxo or whatever the current one is when they can only get little power whereas buy a hemi and have real power and noise to die for

[iain_thornton]

you wouldn't use Weber as a carburettor brand
Hemis originally were supplied with Carter ThermoQuads I believe
you could drop Edelbrocks on, Holleys
I would go with carburettor. much easier to make simple alterations, and I should think cheaper

haha well, this is realistically a lot less practical than a Saxo, particularly as there's no car.....


looked at GM crate engines? LS9 crate......

[Welshbeef]

LS9... is that a 600cui block?

[iain_thornton]

no, it's not a big block or high capacity
it's the unit from the Corvette ZR-1
pushing out 636bhp. 6.2 litre V8, Eaton supercharger

I'm sure you can buy them as a crate engine. you can definitely get the LS7....

[aeropilot]

iain_thornton said:

you wouldn't use Weber as a carburettor brand
Hemis originally were supplied with Carter ThermoQuads I believe
you could drop Edelbrocks on, Holleys
I would go with carburettor.

Why mess around with puny carbs when you wack a Hilborn system on instead

[iain_thornton]

aeropilot said:

iain_thornton said:

you wouldn't use Weber as a carburettor brand
Hemis originally were supplied with Carter ThermoQuads I believe
you could drop Edelbrocks on, Holleys
I would go with carburettor.

Why mess around with puny carbs when you wack a Hilborn system on instead

:|

[Welshbeef]

Gaz. said:

Welshbeef said:

LS9... is that a 600cui block?

376 with a Roots type supercharger.

are the LS series small block and not a Hemi?

[aeropilot]

Welshbeef said:

Gaz. said:

Welshbeef said:

LS9... is that a 600cui block?

376 with a Roots type supercharger.

are the LS series small block and not a Hemi?

LS are not a traditional small block Chevy, but, yes dimensionally they equate to a small block.

[aeropilot]

doogz said:

aeropilot said:

iain_thornton said:

you wouldn't use Weber as a carburettor brand
Hemis originally were supplied with Carter ThermoQuads I believe
you could drop Edelbrocks on, Holleys
I would go with carburettor.

Why mess around with puny carbs when you wack a Hilborn system on instead

Nuts!

What's the point in massive inlet tracts? And do they have some sort of fitting in the end of them? Or is that some sort of filtration arrangement?

You get more power with ram tubes, and the length is dependant on what you are tuning the engine for in terms of torque output. The longer the ram tube the more low-end torque, the shorter the ram tube the more top-end torque.

The things in the end are just plastic or rubber balls to stop crud dropping down the ram tubes into the inlet when parked up as you can see here of this Hilborn injected early Chrysler Hemi with the Mooneyes balls in the tubes

[aeropilot]

doogz said:

I get that, but i've never seen them that long before, seems a bit OTT

That's an original vintage drag racer, and that long tube setup was quite common back in the mid 1960's in that particular racing class.