Cortina MK3 with V8 Dodge 318
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Re: Cortina MK3 V8 Mopar
i really don't get the obsession with the idle. are you really going to plan you're whole engine build around a lumpy idle sound?????
neil.
neil.
Re: Cortina MK3 V8 Mopar
I dont have whats- app, is there another way?
Re: Cortina MK3 V8 Mopar
Morning Neil
No obsessin just like it
No not planning the whole engine build around lumpy cam, just the first part
See if I like it?
Re: Cortina MK3 V8 Mopar
we all 'like' our engines to sound more powerful than they may actually be, but not at the expense of driveability. you'll get fed up with the bad idling and plug fouling in traffic pretty quick if you use too much cam just to get 'the sound'. if you've not had a v8 before the sound of a good running one will put enough of a smile on your face that having a radical idle won't matter as much any more if at all. it's a 5.2 v8 in a little old cortina (manual too for added fun), believe me you'll love it
neil.
neil.
Re: Cortina MK3 V8 Mopar
i found the writings of this-ere Mr kelly to be useful when picking a cam
that, and advice off here steered me clear of going too mental
http://cochise.uia.net/pkelley2/DynamicCR.html
i downloaded his little program
used what i know from measuring my engine to aim for a cam the complimented the static CR.
my static CR was 12.5:1 which is a bit wrong for a street driven car but i had to work with what i had the engine i rebuilt was a wreck. I aimed for a dynamic CR of 8:1
and my motor has pistons with the edge cut, they stuck up 30 thou, and a broad perfectly flat dome like some 340s and original Aussie RT engines
if i run 95 RON and lug it up a hill in 4th at a near stall it will ping . so i run V power or similar concoction and choose the correct gear for the job and have no bother
my car sounds like an accident in a trombone testing facility.....but that is because it only has 6 cylinders and I use a pea shooter or a trumpet as my exhaust depending on mood.
if hot hatch boys can make their Citroen saxo sound meaty with a bean can exhaust any v8 with a normal exhaust is going to sound mean
you could re build your 318 with a set of these
https://www.ebay.co.uk/itm/Chrysler-Dod ... 1825630273
and that is the cheapest you will get them for.... that ring pack is usually $50
its a taller 318 magnum piston with a thin molly coated ring pack, Kieth Black sells much the same at more cost. i think
they all probably come out of the same Indian or Mexican factory.
its a rock hard hyperutectic cast piston. they don't expand much at all and have a slippery coating on the skirts, so you run them at a tighter clearance than standard cast, get less blow-by and better ring seal . They are a smidgen lighter than the originals and i found good consistency in weight across the box of 8 i had. they have a pad area for weight matching, i didn't need to.
if the block and heads have not been messed with they should sit at deck height or a smidge above giving you proper static CR of about 10:1 rather than the 7.5 to 9:1 some of the engines came with,
choose cam based on rod length, (static CR/chamber size swept area) and stroke
the program will indicate dynamic CR for the cam specs you put in
aim for 7.5- 8 on the dynamic CR
the higher compression will give the exhaust a bit more crack which you tame into a nice V8 rumble with an appropriate resonator, if space allows, and muffler... avoid cherry bomb style glass packs.
obviously with a totally flat piston you will need to check that the valves don't bash into them. mine don't but i have a semi hemi head that looks like it came off a diesel generator, your 318 one might be a bit more wedge shaped.
Dave.
that, and advice off here steered me clear of going too mental
http://cochise.uia.net/pkelley2/DynamicCR.html
i downloaded his little program
used what i know from measuring my engine to aim for a cam the complimented the static CR.
my static CR was 12.5:1 which is a bit wrong for a street driven car but i had to work with what i had the engine i rebuilt was a wreck. I aimed for a dynamic CR of 8:1
and my motor has pistons with the edge cut, they stuck up 30 thou, and a broad perfectly flat dome like some 340s and original Aussie RT engines
if i run 95 RON and lug it up a hill in 4th at a near stall it will ping . so i run V power or similar concoction and choose the correct gear for the job and have no bother
my car sounds like an accident in a trombone testing facility.....but that is because it only has 6 cylinders and I use a pea shooter or a trumpet as my exhaust depending on mood.
if hot hatch boys can make their Citroen saxo sound meaty with a bean can exhaust any v8 with a normal exhaust is going to sound mean
you could re build your 318 with a set of these
https://www.ebay.co.uk/itm/Chrysler-Dod ... 1825630273
and that is the cheapest you will get them for.... that ring pack is usually $50
its a taller 318 magnum piston with a thin molly coated ring pack, Kieth Black sells much the same at more cost. i think
they all probably come out of the same Indian or Mexican factory.
its a rock hard hyperutectic cast piston. they don't expand much at all and have a slippery coating on the skirts, so you run them at a tighter clearance than standard cast, get less blow-by and better ring seal . They are a smidgen lighter than the originals and i found good consistency in weight across the box of 8 i had. they have a pad area for weight matching, i didn't need to.
if the block and heads have not been messed with they should sit at deck height or a smidge above giving you proper static CR of about 10:1 rather than the 7.5 to 9:1 some of the engines came with,
choose cam based on rod length, (static CR/chamber size swept area) and stroke
the program will indicate dynamic CR for the cam specs you put in
aim for 7.5- 8 on the dynamic CR
the higher compression will give the exhaust a bit more crack which you tame into a nice V8 rumble with an appropriate resonator, if space allows, and muffler... avoid cherry bomb style glass packs.
obviously with a totally flat piston you will need to check that the valves don't bash into them. mine don't but i have a semi hemi head that looks like it came off a diesel generator, your 318 one might be a bit more wedge shaped.
Dave.
The Greater Knapweed near the Mugwort by the Buckthorn tree is dying
Re: Cortina MK3 V8 Mopar
Why is this Dave? Is it becasue of the persistent drone?
We have cherry bombs on the Chevy, with outlets behind the cab. Mandie loves the sound but I think its too loud.
I was planning an H pipe and longer tubes to quieten it down, or should we ditch the cherry bombs?
Matt Hollingsworth - Vehicle Registrar
Panther Pink 73 Aussie Charger 265 Hemi 4 spd
Challenger Sam Posey Tribute car
Panther Pink 73 Aussie Charger 265 Hemi 4 spd
Challenger Sam Posey Tribute car
Re: Cortina MK3 V8 Mopar
they are noisy and fun when new
but within 6 months the packing has disintergrated, blown away, and they are noisy and not fun anymore
i used to use them on the vws. freaked out a small child and he ran in front of the car and did the frightend rabbit routine
scared me into a new sensible exhaust i missed him..... but lucky no one coming the other way, turned me from a kid with a car, into a bit more of a sensible driver... did me a favour, no more detours through hedges... it was the horrified look on his mothers face....
i just found them a bit wearing after a while
just my preference, there is nothing wrong with them in a car you potter in...but once i actually started using it for its intended purpose used to do my head in on Motorway. compensate with the stereo up and have ringing ears on arrival
with a dynomatted car...might be ok
Dave
but within 6 months the packing has disintergrated, blown away, and they are noisy and not fun anymore
i used to use them on the vws. freaked out a small child and he ran in front of the car and did the frightend rabbit routine
scared me into a new sensible exhaust i missed him..... but lucky no one coming the other way, turned me from a kid with a car, into a bit more of a sensible driver... did me a favour, no more detours through hedges... it was the horrified look on his mothers face....
i just found them a bit wearing after a while
just my preference, there is nothing wrong with them in a car you potter in...but once i actually started using it for its intended purpose used to do my head in on Motorway. compensate with the stereo up and have ringing ears on arrival
with a dynomatted car...might be ok
Dave
The Greater Knapweed near the Mugwort by the Buckthorn tree is dying
Re: Cortina MK3 V8 Mopar
they're not as bad on trucks as the noise is behind the cab, in a car they end at the back of the body or under it and drone at certain speeds which always seems to be a comfortable cruising speed for some reason? also they can be farty/brappy if you know what i mean when accellerating.MattH wrote: ↑Tue Sep 22, 20 10:24 amWhy is this Dave? Is it becasue of the persistent drone?
We have cherry bombs on the Chevy, with outlets behind the cab. Mandie loves the sound but I think its too loud.
I was planning an H pipe and longer tubes to quieten it down, or should we ditch the cherry bombs?
neil.
Re: Cortina MK3 V8 Mopar
This is exactly the kind of input I need thanksmygasser wrote: ↑Mon Sep 21, 20 10:46 am we all 'like' our engines to sound more powerful than they may actually be, but not at the expense of driveability. you'll get fed up with the bad idling and plug fouling in traffic pretty quick if you use too much cam just to get 'the sound'. if you've not had a v8 before the sound of a good running one will put enough of a smile on your face that having a radical idle won't matter as much any more if at all. it's a 5.2 v8 in a little old cortina (manual too for added fun), believe me you'll love it
neil.
Re: Cortina MK3 V8 Mopar
Thanks DaveDave999 wrote: ↑Mon Sep 21, 20 5:41 pm i found the writings of this-ere Mr kelly to be useful when picking a cam
that, and advice off here steered me clear of going too mental
http://cochise.uia.net/pkelley2/DynamicCR.html
i downloaded his little program
used what i know from measuring my engine to aim for a cam the complimented the static CR.
my static CR was 12.5:1 which is a bit wrong for a street driven car but i had to work with what i had the engine i rebuilt was a wreck. I aimed for a dynamic CR of 8:1
and my motor has pistons with the edge cut, they stuck up 30 thou, and a broad perfectly flat dome like some 340s and original Aussie RT engines
if i run 95 RON and lug it up a hill in 4th at a near stall it will ping . so i run V power or similar concoction and choose the correct gear for the job and have no bother
my car sounds like an accident in a trombone testing facility.....but that is because it only has 6 cylinders and I use a pea shooter or a trumpet as my exhaust depending on mood.
if hot hatch boys can make their Citroen saxo sound meaty with a bean can exhaust any v8 with a normal exhaust is going to sound mean
you could re build your 318 with a set of these
https://www.ebay.co.uk/itm/Chrysler-Dod ... 1825630273
and that is the cheapest you will get them for.... that ring pack is usually $50
its a taller 318 magnum piston with a thin molly coated ring pack, Kieth Black sells much the same at more cost. i think
they all probably come out of the same Indian or Mexican factory.
its a rock hard hyperutectic cast piston. they don't expand much at all and have a slippery coating on the skirts, so you run them at a tighter clearance than standard cast, get less blow-by and better ring seal . They are a smidgen lighter than the originals and i found good consistency in weight across the box of 8 i had. they have a pad area for weight matching, i didn't need to.
if the block and heads have not been messed with they should sit at deck height or a smidge above giving you proper static CR of about 10:1 rather than the 7.5 to 9:1 some of the engines came with,
choose cam based on rod length, (static CR/chamber size swept area) and stroke
the program will indicate dynamic CR for the cam specs you put in
aim for 7.5- 8 on the dynamic CR
the higher compression will give the exhaust a bit more crack which you tame into a nice V8 rumble with an appropriate resonator, if space allows, and muffler... avoid cherry bomb style glass packs.
obviously with a totally flat piston you will need to check that the valves don't bash into them. mine don't but i have a semi hemi head that looks like it came off a diesel generator, your 318 one might be a bit more wedge shaped.
Dave.
I must admit I dont understand all of it, but I will read and digest it
Re: Cortina MK3 V8 Mopar
Personally I hate the rasp of Cherry bombs. Turbo style mufflers have a quieter and much deeper tone and sound much better under full throttle. Flowmaster if you want to kick up a din, Dynomax if you want to tone it down a bit.
“This ain’t no party, this ain’t no disco, this ain’t no foolin’ around”
Re: Cortina MK3 V8 Mopar
Umm... just wanted to say "This" !mygasser wrote: ↑Sat Sep 12, 20 3:33 pm don't go too mad on the 'highest performance' cam on the page when looking. you'll only be disappointed with the car on the road as it'll be flat as a turd in the normal everyday rev range and run out of cylinder head/valve spring/breathing etc at much above 5500-6000 rpm's.
they're designed so you don't need a really lairy cam to get a rowdy idle, best of both sort of deal if you like.
neil.
Speaking as someone who is unhappy with their cam and is now (I know, I know) looking to downgrade at some point dont go too wild for street. The loss of brakes vacuum (Petes 'spin the bottle' is a great analogy) and general stinkiness and bag-o-spanners-at-low-revs isnt worth it. Go 'warm' rather than 'hot' would be my 2p from experience...
(I mean there is an upside - mein gott does it pull now but you gotta nail it. And then the back end tries to overtake you in second gear - this doesnt go down well on the high street. Your cars gonna be plenty quick and mean sounding.)
Oh, and weighing in on the mufflers, I went flowmaster for the childish sound. Dynamax were too quiet on my old engine - sounded like a tesla.
"Cum homine de cane debeo congredi." Woof.
Current Charger status - "Working !"
Current Charger status - "Working !"
Re: Cortina MK3 V8 Mopar
Thanks for the input on exhausts
I'm going to experiment with my own made silencers and different configurations as well as pipe sizes
And may leave the cam alone for the moment
I'm going to experiment with my own made silencers and different configurations as well as pipe sizes
And may leave the cam alone for the moment
Re: Cortina MK3 V8 Mopar
The cam I told you about in mine ticks all the boxes for me with a reasonable lumpyish tick-over, has vac for the brakes, doesn't choke up in traffic & ticks over at about 800(but mine is a 340 stroker)