4 barrels and intakes are over rated on a street car

[Budnicks]

For Sale: Lightweight Aluminium Edelbrock Performer Manifold, Performer Cam, Holley 600 Vac Sec, TTI Headers and 2.25" dual exhaust

Willing to swap for: Factory cast iron 2 barrel manifold, factory cam, 2 barrel cam, log manifolds and single exhaust

Reason: Performance upgrade desired

Also interested in bias ply skinny tires as thinking of doing some track work.

 

[69a100]

https://www.forabodiesonly.com/mopa...-rated-on-street-cars.472829/#post-1973127712 Different reaction on FABO.

I think this is the best reply over on that topic!

V8s are overrated on the street. Everybody should immediately install \6s and demand an aluminium cylinder head.

 

[Kern Dog]

With the impressive times that Ford guys turn with their 5.0 engines, a 318/5.2 that runs strong isn't too much of a surprise. You just need to make a few changes.
I stand by my earlier statement....230 HP from a stock '68-72 318 is not a legit number. They were GROSS HP ratings. The 1973 318 is not much different yet it took a 80 hp drop?
Anyone that has taken apart a stock engine and actually measured it all would instantly see that the factory REALLY fudged the numbers on their published ratings. MY '70 383 is listed as 8.7 to 1 compression yet it calculates to 8.12 The HP ratings were equally ficticious.

 

[66 Sat]

Sheeit - wish my built up poly ran like this one...(well ok not quite). It's evident, despite the mega-cash invested, I failed to get more giddeeup...than anticipated. Was about to do crate 360 until the shop I was referred to talked me into rebuilding the poly. Worked out well...ahh...for the shop. I waited years before messing too much with the motor (installed 4bbl, el ig, sure grip '65 dodge rear, etc) as it ran so great. Gotta say they're durable.

I wonder if there's some underlying reason why your poly isn't performing, maybe cam timing or something? I've read a few things previously about the work you've done and the lack of go. Mine has a similar build I think (but without headers) and most days I'm pretty happy with it. I haven't been able to take it down the strip as my local place won't allow it with only lap belts, but it feels at least as fast as my old Falcon that had a 351 Cleveland and on the street from a standing start it matches or beats the modern stuff that runs 14's (think Golf GTI etc).
The only time it can feel like it's missing something is at low-ish revs in the wrong gear (it's auto), but once kicked-down or changed manually it really picks-up.
I've got another cam to go in (264/.450” ([email protected]”) 110LC Solid Camshaft) to replace the 258 cam, so that should hopefully give it more top end.

 

[BeatersRus]

69 318 = flattop pistons
73 318 = dished pistons.
slice it anyway you like,theres more compression there and hp than the 73.
also,as far as fudging,consider that they rated the 340 at 275 when it was really more like 320 hp.
back then the " performance " motors were underrated for insurance reasons as Well as racing reasons/diff classes.

 

[Slap Stick]

No one is disputing the 60s numbers were gross hp ratings as I posted. But that is how they were rated-at the crank on a dyno.
We all realize the 73 is rated at the rear wheels-net-as I posted.
It is what it was.
And from 92 on the 318 was rated.....
230hp.

 

[Ron H]

I wonder if there's some underlying reason why your poly isn't performing, maybe cam timing or something? I've read a few things previously about the work you've done and the lack of go. Mine has a similar build I think (but without headers) and most days I'm pretty happy with it. I haven't been able to take it down the strip as my local place won't allow it with only lap belts, but it feels at least as fast as my old Falcon that had a 351 Cleveland and on the street from a standing start it matches or beats the modern stuff that runs 14's (think Golf GTI etc).
The only time it can feel like it's missing something is at low-ish revs in the wrong gear (it's auto), but once kicked-down or changed manually it really picks-up.
I've got another cam to go in (264/.450” ([email protected]”) 110LC Solid Camshaft) to replace the 258 cam, so that should hopefully give it more top end.

Yeah - there's a feeling something isn't all set right or compatible that will take a smarter guy to investigate. Right now I'm on full mech advance as after futzing with the advance/timing several times I'd always get a miss at certain RPM's - change it up a bit and the miss fire would happen at lower or higher rev's. Only time I get zero miss is on full mech. A renowned mech guy started working with me on it, changed out the dist springs then disappeared never to be heard from again! Hope he's all right! So guessing this is in a messed up state...I've had so damn many other to-do's on the car (brakes and some wiring issues I think are behind now) and it runs solid, haven't got back to digging in on it as the better half has a list of to-do's to I'm behind on in da mix.

 

[747mopar]

Things are mismatched on the other car,and no one is impressed with any 318 car!

I agree about the mismatch especially the gearing but 318's?? I've had a few that ran pretty damn good.

 

[dadsbee]

One thing about 318's.. you can drain the rad.. drain the oil..throw a brick on the gas pedal and the f'rs still wont' blow up! Just ask my Dad! LMAO. Seized and started again the next morning! "Just put that 440 in there and be done with it". Gotta love'm... and God I miss him!

 

[Ron H]

Holy Crappola Budnicks - 48,759 messages! Did our B-bod forum award ya with a coffee mug or something? Maybe a highly coveted dash plaque? lol

 

[toolmanmike]

Holy Crappola Budnicks - 48,759 messages! Did our B-bod forum award ya with a coffee mug or something? Maybe a highly coveted dash plaque? lol

He's #1 with the most messages here. You had better get busy!

 

[Ron H]

He's #1 with the most messages here. You had better get busy!

Think we all should pitch in and get him a java mug or dash plaque...ya know something we all can't have enough of...

 

[Kern Dog]

No one is disputing the 60s numbers were gross hp ratings as I posted. But that is how they were rated-at the crank on a dyno.
We all realize the 73 is rated at the rear wheels-net-as I posted.
It is what it was.
And from 92 on the 318 was rated.....
230hp.

Sorry, Wrong again.
The NET rating was not wheel HP, it was still flywheel HP. They just factored in the parasitic losses of the alternator, water pump and fan, P/S pump, exhaust system, A/C, etc.

 

[Budnicks]

Holy Crappola Budnicks - 48,759 messages! Did our B-bod forum award ya with a coffee mug or something? Maybe a highly coveted dash plaque? lol

Nope, Zilch, Nada, Zero, not a thing,
just a few good buds/great friends
a couple of free to me, "Gold memberships" by other members
I met thru FBBO

Yep it adds up fast,
time flys when you're having fun, when you like doing it
10-12 questions answered daily for 10 years
I think it's actually more
many have been removed

 

[Budnicks]

Sorry, Wrong again.
The NET rating was not wheel HP, it was still flywheel HP. They just factored in the parasitic losses of the alternator, water pump and fan, P/S pump, exhaust system, A/C, etc.

Where did you get that fact from ?
I've seen it stated in many different ways
even today jusT checking it out on a Bing Search

I think
'don't quote me'
I remember reading/hearing it somewhere,
I don't remember where
(it may be just a wives tale, that stuck)
but;
that "allegedly" newer Net HP ratings
was actually at the output shaft of the transmission
not at the flywheel like before
taking into account, that total/inclusive parasitic loss,
usually 15%-25% less/loss
if all things were equal, from old rating to new

it's not At the Wheel HP, like today's drum dynos
IIRC that part is correct
I've seen it stated both ways too

take what ever way you like...
I'll go with the ol' school terminology

 

[Kern Dog]

Rick Ehrenberg from Mopar Action magazine has written about it many times. One or 2 issues ago he wrote a full article discussing gross versus net HP ratings and how they arrived their numbers.
Net at the flywheel would be the same for each engine. Net at the wheel would vary wildly depending on transmission, torque converter stall, drive shaft weight/mass, axle weight/mass axle gearing and tire diameter.

 

[Ironbuilt]

Holy Crappola Budnicks - 48,759 messages! Did our B-bod forum award ya with a coffee mug or something? Maybe a highly coveted dash plaque? lol

Yeah, but they're all pretty worthless, so don't let it bother you.

 

[beanhead]

"Bone-stock" 318s absolutely were underrated screamers, you're just a bunch of haters..

 

[Cranky]

Ya got anymore parts in the yard? I'll send ya my motor...

Nothing much to speak of these days. Even my big block stuff has been drastically trimmed....

 

[Kern Dog]

OP must have stumbled onto the rare and elusive 318 HEMI 2 barrel.