318 to 390 hp?

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trbodrt

trbodrt

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I was curious if anyone runs or would know about how much hp this stroker kit would make with port matched 360 heads with 2.02 valves ( because i already have them), an rpm airgap intake with a 750 demon and the right cam with about 10:5 to 1? I'm just trying to decide what to build, i'm looking for at least 400 to the crank and already have a 318. Any input would be appreciated.
 
Well that didn't answer the question! LOL! Ha ha ha

Yea, someone here has one. Now,,,how was that BaDart? Some guy from Alaska I thinks.....

The real deal with a stroker kit is torque and lots of it.
 
With 390 cubes and good heads it should be pretty easy to get to around 400 HP. Alot of 400 HP builds out there on just 318 cubes with good heads. You can approach 300 with a mild build and small valve heads. Your 390 will be able to use a much larger cam and still be very street friendly. I know there are members here running that combo, hopefully they will chime in and can give you some specific HP numbers they see with their combos.
 
I just like to under estimate the power, if it makes more than that great, I like the idea of more cubes, it will be a street car so i would like the torque.
 
tHATS WHAT IM GOIN FOR A 50 SHOT OF NITROUS on my already mildly built 318 its already started its got an intake msd ignition cammed and an intake and the heads are redone i wanna get it dynoed tho what you think the hp range is in the high 13s
 
rumblefish360 said:
Well that didn't answer the question! LOL! Ha ha ha

Yea, someone here has one. Now,,,how was that BaDart? Some guy from Alaska I thinks.....

The real deal with a stroker kit is torque and lots of it.
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Duh. I gues I read faster than my brain can process it sometimes. LOL
 
mopardart72 said:
tHATS WHAT IM GOIN FOR A 50 SHOT OF NITROUS on my already mildly built 318 its already started its got an intake msd ignition cammed and an intake and the heads are redone i wanna get it dynoed tho what you think the hp range is in the high 13s
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In most cases it seems that 300-325hp should easily run mid to high 13's in an A-body. If a 418hp hydraulic cam can move a 3400lb 67 cuda convt. to an 11.70 with an auto than I'd say 3-325hp should be good for at least high 13s with a less than perfect setup and pass. Why not a 125hp shot? It should handle it fine and doesn't require any kind of secondary fuel supply, maybe pull about 4-6* of timing from my lil bit of N20 knowledge and you should be on to something IMO
 
If 400 h.p. is what your looking for you can get that from a "stock stroke' 360...
 
Yes a 390 stroker would def make over 400 h.p. But I think the 390 kits are pricey,more than other small block stroker kits.I could be wrong but I remember looking at them on speedomotives sight a while back.

Maybe things have changed?

Where are you? I have a 360 block with no main caps I could sell ya for $50.
 
for a stroked 318 to 390 ...

I would use a scat 4" cast crank...scat I beam rods and KB forged pistons...that would be my kit ...

due to the lite weight of the rods and pistons it will balance internally without any mallory metal.
 
I know that it is possible to get 400 hp from a 360, the thing is i have a 318, i figure if i'm going to buy a new crank rods and pistons anyways i might as well go with the stroker kit, speedomotive sells them for about 1400 with rings and bearings, I know 400hp shouldn't be a problem with this kit if not more, i'm just looking for someone who runs it to see what kind of power is being made.
 
trbodrt said:
I know that it is possible to get 400 hp from a 360, the thing is i have a 318, i figure if i'm going to buy a new crank rods and pistons anyways i might as well go with the stroker kit, speedomotive sells them for about 1400 with rings and bearings, I know 400hp shouldn't be a problem with this kit if not more, i'm just looking for someone who runs it to see what kind of power is being made.
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Curious, why would you have to buy a new crank? But you're thinking along the right lines.
If you're going to buy pistons, and have a OEM set of rods re-done and a crank turned/polished, you are nearly there. Pistons all cost the same, $250 into reman a set of 40 year old rods vs. $300 for a set of SCAT I beams and the diff REALLY is the $400 for the cast 4.00" crank. A no brainer if you ask me.

Yea, 400hp is very do-able, and so is 450-475 ft lbs of torque!!

Gideeeee UP!!
 
i figured as far as the crank goes i just want to do it right, if I ever step it up with better heads i'll be certain the bottom end will be fine. I know a stock crank is good but it's just peace of mind. thanks for the responses....now, has anyone built one of these things around here?
 
Got one that has a Mopar Performance crank, Eagle Sir Rods, Diamond Forged Pistons, Comp XE274H camshaft, and Indy/RHS X Heads with 1.92' Intakes. Running about 10.0 compression. Have not had it on a dyno but will need to get to a chassis dyno to get some tuning done; so one day I will find out if it is a stout as it feels. I only have about 275 miles on it so far and have not had my foot in it completely yet, but even under 4,00 RPM it is a blast. If I had any thoughts of taking it to a drag strip and using upper RPM band on a regular basis I probably would have gone with the 2.02" Intakes.
 
Is it a zero deck engine? They always sound so crisp.

How about a sound or video clip?:clock:
 
I think if you have 360 heads you should lose the idea of 10.5:1. First, you don't need it, and second it may cause problems with a milder cam selection and pump gas. Go with a dished piston and bring it proud of the deck .005". Run any standard head gasket, and later if you want to upgrade to better heads any closed chamber head will be perfect. With a cam in the 230-235°@050 range you should expect around 400-430hp depending on the heads with some much bigger torque.
 
moper said:
I think if you have 360 heads you should lose the idea of 10.5:1. First, you don't need it, and second it may cause problems with a milder cam selection and pump gas. Go with a dished piston and bring it proud of the deck .005". Run any standard head gasket, and later if you want to upgrade to better heads any closed chamber head will be perfect. With a cam in the 230-235°@050 range you should expect around 400-430hp depending on the heads with some much bigger torque.
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Unless you get alum heads comp should be kept at or below 10:1 on todays gas,especially with 360 heads. They have no quench area unlike a Magnum or aftermarket head,which greatly helps with detonation.

Moper is bang on with his #'s again. 400 h.p is easy to do with a 318 and I would build a stout bottom end to hold up to any cylinder head upgrades.
 
You're right about squish quench, 360 heads are kind of dogs.

If you have flattops you WANT closed chamber heads, no matter what.

That squish quench is power add AND anti detonation.. allows more advance.
Lower torque band, more slack top end. Like high compression without the cost.

Set your advance curve appropriately, don't forget.
 
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