justinp61
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Post up some time slips to back up that 500 HP claim too.
Big horsepower 318 builds
- Thread starter toolmanmike
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Post up some time slips to back up that 500 HP claim too.
Now you are adding things.... the OP didn't say a word about street friendly. In fact, he said gas or alcohol.I'm looking forward to the recipe for a 500 hp 318 NA at 6200- 7000 rpm. lol and street friendly.
j par
Well-hung Member
Likely no alternator and a filled block and it's pulled back down the return lane by a golf cart...Now you are adding things.... the OP didn't say a word about street friendly. In fact, he said gas or alcohol.
Went to take a look at the 318 Roller Engine today. No Joy, turns out to be a V6 advertised as a 318 V8.
Something did not look right very first thing, "That's a V6", took a breaker bar to the crank and would not turn over.
Froze Up, Pass . . .
The guy felt bad that he did not know the difference. Covered my gas money for the round trip out.
Win some, lose some.
It did have the 904, lockup overdrive trans from the '91 Dakota 2 wheel drive truck that is probably still good, with torque converter. $100 bucks package deal engine trans, and mini starter.
If anyone wants the overdrive trans for their A Body, PM me and I can give you the guy's number. Near Albert Lea MN
you can be thankful he covered the gas at least
He was a nice guy, his grandson was there to help, he showed me around of what he had, kind of like "American Pickers", it was a nice day for a drive.
Also learned some more about Mopar V6 Stuff. Had the "Mini 302 Close Chamber Heads" on that V6. And the stock roller cam had a lift of .417/.417 Intake and exhaust, pretty good for a stock roller cam. More than likely had the good 9.2:1 flat top pistons and the full floating rods in it too.
My '91 318 roller engine has the full floating rods.
I am referring to YR's street friendly claim.Now you are adding things.... the OP didn't say a word about street friendly. In fact, he said gas or alcohol.
and there are some that can do it under 7000 rpm.
yellow rose
Overnight Sensation
Maybe. I’m not a fan of the track. In fact, I hate going to the track. To the point if I never go again I wouldn’t care.
Yep just like the 302's. When the Magnum's came out the v6 heads were just like the v8 Magnums.
Wyrmrider
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hanging output shaft and housing from 4wd to 2wd is easy
justinp61
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Without a time slip to back it up a dyno sheet is just a piece of paper with numbers on it. You've heard the old saying, "we don't race dynos".
moper
Well-Known Member
Never said it’s impossible. I said it never happens and the owners always bullshit their way through not running numbers an actual street car type 500hp 318 should run. Any claims to it need a weight and a mph or it’s a load of ****. Just that simple.
Like Mr Porter said- either guys don’t have the cash or won’t spend it on a teen build. Those with the means build from a better core.
PRH
Well-Known Member
500hp 408/416 =
500hp 318 =
500hp 318 =
yellow rose
Overnight Sensation
yellow rose
Overnight Sensation
If you run it on the with the accessories hooked up, then the numbers are correct, as long as you correct for weather conditions.
All the bullshit of needing a time slip is just that...bullshit. A dyno is a tool, and used correctly will give accurate results.
yellow rose
Overnight Sensation
What’s the difference? I made 545 at 5200 with a 408 on hydraulic rollers. It would have made close to 600 if the customer would have switched to solid lifters and used a cam to make power to say...6500. That wasn’t a hard build either. A basic 408. The hard part was getting the owner off the internet and to stop listening to the internet hero’s, which at that time I had no idea this **** even existed.
So...I can take the very same heads, stick them on a 318 with equal compression and a cam with timing for the smaller displacement and make the same power as the 408. It just won’t do it at a John Deere RPM, nor will it be at Comp Eliminator RPM.
Of course, that engine doesn’t count because there are no time slips for it, but it was with the carb, ignition, headers and water pump he was using.
It has been a few years since I had one of my own, but isn't a time slip "just a piece of paper with numbers on it"?
j par
Well-hung Member
This seems to be my point this is basically a filled block with no alternator possibly an electric water pump and fuel pump for a dedicated purpose only this would be a very very special build for a very one only purpose...
Never got this only the track can tell your real hp, for one the formulas to do so probably where figured out in the first place by a mix of dyno and track results so who knows the accuracy of any of those formulas and you can't verify them if you can't trust dyno results. Second your only gonna get accurate results if your car is setup to take advantaged of every last hp, or otherwise is only given you a results of the hp your using. Obviously how your car performs in the real world matters more than a dyno but then again most don't even race their cars on the track so for most it's subjective on what is the best build setup for them.
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HP per CI for the 408 is 1.33
HP per CI for the 323 is 1.54. 323 is on account of a 30 over 318.
Not that big of a difference if you know what you are doing.
The difference will be in the rpm, I don't care how you slice it , 1.54 hp per cube with a 323 will need rpm
j par
Well-hung Member
Nothing like a discussion with extremely loose directions LOL..
I know your not saying this but I think hp/cid is where people get screwed up thinking it's hard for small engines to make power.
Just cause say 1.6 hp/cid is hard for a large engine doesn't necessarily mean the same for smaller engines, cylinder head is the main part for any desired hp level.
We know a fully ported /6 head can make about 300 hp so a 170 /6 making a 1.6 hp/cid for 260 hp isn't out of realm of possibility using nothing overly tricky than mainly reworked factory parts now a 543 stroker big block is gonna require a little more than a ported out 440 head to make 1.6 hp/cid for 870 hp and be a fully custom build.
There's a bunch of heads that can support 500hp in a 3.91-3.97 bore the only slightly tricky thing is getting the valve train to work at 7000-8000+ rpm.
I've been waiting for someone to post up a basic recipe for a 500 hp 318 @ 6200 - 7000 rpm.
I hear it's easy.
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