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383 Cam choice

Started by WhiteOnGreen, May 06, 2011, 11:12:40 AM

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WhiteOnGreen

Hello, I have seen some thread about choice  of camshaft and it is complicated for me to do a correct election so I ask for your help.
The engine has been reconstructed, it is 68 383 0.30 over and the CR is 10.7:1, I would like an engine with good balance between performance and  good gas mileage, the elevate  compression is not a problem, I fill the tank with 98 octane gas
the engine has  906HP heads
MP Dual  plane intake mainfold whit Holley 750 vacuum secondary carb (I have other Holley 670 avenger)
Headers and 2,5" lines exaust
Automatic 727 stock stall (I believe) and 3.23 rear end
235/60/15 all arond
The car have bendix brake booster.
I believe that I do not forget any important fact, my idea is install a MP4452783AC from Summit
http://www.summitracing.com/parts/DCC-4452783AC/
Is a good cam?

Nacho-RT74

that's not more than the stock replacement for Hi Po BB Magnum engines

with the setup you have, I think you can go bigger. I'm not the right guy to say you which one, but some being floated lately are

Crower 271HDP or 282HDP

and very typical are Engle K56 or K54/56 split grind, lunati 303, and some comp cams I can't recall right now.

there are some Hughes also on same specs like good options

on Mopar cams, I'm going myself with 280/474 cam ( on a 400 )

ONCE AGAIN, I'M NOT THE EXPERT
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

WhiteOnGreen

Thanks Nacho but the cam instaled now is a MOPP4120235  284 / 284 Duration - 484 / 484 Lift and the engine have a rough idle, poor vacuum for brake booster and a excesive fuel consum. In Spain is 6,60$ gallon  :flame: :flame:
The car is for day cruising that's why I look for a camshaft with good low and midrange response.

firefighter3931

The 284/484 is way too much cam for a mild 383 with stock converter and 3.23 gears....not surprising to hear it's giving you grief !  :brickwall:

These are 2 descent cams that would run much better in your setup ;

(1) Lunati 302 VooDoo grind

(2) Crower HDP271

I've recommended both to members here and allways with excellent results.  :2thumbs:


Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

Nacho-RT74

AH OK, NO SABIA QUE ERAS DE ESPAÑA...

Un amigo mio tiene el mismo motor que yo y le puso la misma 280/474 que yo le voy a poner y la verdad el ralenti es muy estable. El suyo es un coche de uso diario igual que el mio. Claro los dos cambiamos pistones ya que el 400 no tiene pistones de alta compresion de fabrica. Le instalo los mismos pistones que yo le voy a poner, que no llegan a 10 a 1 ( alrededor de 9.3 a 9.5 ) y la verdad es que como te dije, anda MUY bien para ser de doble uso. Los frenos son tambien asistidos por vacuum y responden muy bien casi como stock

La leva 280/474 surgio en sus dias para usar las bondades y el exito que la 284/484 que tu tienes daban en la pista para hacerla amigable en la calle. recuerda que tambien el centerline es 108 en la tuya, en la 280/474 es 110 que es muchiiismo mas amigable

OJO, no estoy diciendo que sea la ideal, muchos te diran poner otra, pero en lo que he visto en el coche de mi amigo, la verdad la 280/474 es muy buena opcion y yo voy a seguir ese camino porque queria mantener mi coche lo mas MOPAR posible

( gracias a Dios lleno el tanque en Venezuela con solo 2 dolares :D pero cuando me mude a españa, se que todo cambiara )

EDITING, RON IS THE MASTER ON THIS BOARD WHEN TALKING ABOUT ENGINES
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

WhiteOnGreen

Quote from: Nacho-RT74 on May 06, 2011, 12:44:45 PM

( gracias a Dios lleno el tanque en Venezuela con solo 2 dolares :D pero cuando me mude a españa, se que todo cambiara )

EDITING, RON IS THE MASTER ON THIS BOARD WHEN TALKING ABOUT ENGINES
Pues si que lo vas a notar  :'( , gracias por postear en castellano pero por si molesta a algún otro forero podemos postear en inglés, así practico y aprendo.
I like the Lunati cam but for the install, is necesary change for new springs? and which timing gear chain (3 bolts) it is appropriate, a lot of in summit  :shruggy:
PD: Nacho, it is possible that you know my car of the forum in Spain. A pic in the promo of Fastfive

TUFCAT

I got some free internet translation of what Nacho said...

OH OK, NOT WISE THAT you WERE OF SPAIN...  

A friend mine has the same motor that I and the same one put in 280/474 that I am going to put in and the truth is really very stable.  His car is daily use the same as the mine.  Clearly the pistons were changed since the 400 does not have pistons of high compresion.  You could use the same pistons that I am going to use, but do not arrive at 10 to 1 (around 9,3 to 9,5) and as I told you, work VERY well for double double use.  The brakes attended by vacuum respond very well almost as stock

The tappet 280/474 you suggested to use and the former one that the 284/484 that your have they gave in the trail to do it friendly on the street. Recalls that  the centerline is 108 in yours, in the 280/474 is 110 that is friendly

I am not saying that be the ideal,  but in which I have seen in the car of my friend, the truth the 280/474 is very good opcion and I am going to continue that road because my car it MOPAR possible

(thanks to full God the tank in Venezuela with alone 2 dolars but when move me to Spain, itself that all changed)


Nacho-RT74

hey tuff!!! using webtranslators ? LOL

Tranquilo, aqui no hay problemas con otros idiomas, ya tengo 10 años por aqui y a veces cuando entra alguien de habla hispana hablamos en castellano alguna que otra cosa, no siempre por supuesto

La leva LUNATI puede ser usada con los resortes stock, solo que si los tuyos tienen ya mucho uso igual es recomendable cambiarlos. De 100 a 110 libras a la altura de asiento es mas que suficiente. Los originales son como de 90 libras ( cuando son nuevos )

Kit de tiempo ( cadenas y piñones ) La Summit doble roller es buena especialmente para el uso que le vas a dar y es economica. La hay para tres tornillos y para 1 tornillo. Aunque igual lunati puede venderte la leva de un solo tornillo.

No no conocia ese coche... tu no perteneces al foro del club de coches americanos de españa ?
http://cccae.mforos.com/
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

TUFCAT

Quote from: Nacho-RT74 on May 06, 2011, 02:41:38 PM
hey tuff!!! using webtranslators ? LOL

Tranquilo, aqui no hay problemas con otros idiomas, ya tengo 10 años por aqui y a veces cuando entra alguien de habla hispana hablamos en castellanoalguna que otra cosa.

La leva LUNATI puede ser usada con los resortes stock, solo que si los tuyos tienen ya mucho uso igual es recomendable cambiarlos. De 100 a 110 libras a la altura de asiento es mas que suficiente. Los originales son como de 90 libras ( cuando son nuevos )

Kit de tiempo ( cadenas y piñones ) La Summit doble roller es buena especialmente para el uso que le vas a dar y es economica. La hay para tres tornillos y para 1 tornillo. Aunque igual lunati puede venderte la leva de un solo tornillo.

No no conocia ese coche... tu no perteneces al foro del club de coches americanos de españa ?
http://cccae.mforos.com/

dude.....do I want to try that?  :icon_smile_big:

firefighter3931

Quote from: WhiteOnGreen on May 06, 2011, 01:47:06 PM
I like the Lunati cam but for the install, is necesary change for new springs? and which timing gear chain (3 bolts) it is appropriate, a lot of in summit  :shruggy:


Your current valve springs will be fine because they are matched up with the MP 284 cam.  :yesnod:

The VooDoo does require a 3 bolt gear set. The Comp Cams Magnum double roller 3-bolt works great and is less than $50 for the chain and gears.

The Crower HDP271 uses a single bolt so you could re-use your existing timing chain and save a few $$

Both are excellent cams for what you want to do. I would avoid the MP280 for your combination.  :Twocents:



Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

Nacho-RT74

as I said... RON is the man to ask on this ;D

Just a question Ron, Aren't Voodoo cams crew able to get one bolt cams made ?
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Nacho-RT74

Quote from: TUFCAT on May 06, 2011, 02:51:30 PM
Quote from: Nacho-RT74 on May 06, 2011, 02:41:38 PM
hey tuff!!! using webtranslators ? LOL

Tranquilo, aqui no hay problemas con otros idiomas, ya tengo 10 años por aqui y a veces cuando entra alguien de habla hispana hablamos en castellanoalguna que otra cosa.

La leva LUNATI puede ser usada con los resortes stock, solo que si los tuyos tienen ya mucho uso igual es recomendable cambiarlos. De 100 a 110 libras a la altura de asiento es mas que suficiente. Los originales son como de 90 libras ( cuando son nuevos )

Kit de tiempo ( cadenas y piñones ) La Summit doble roller es buena especialmente para el uso que le vas a dar y es economica. La hay para tres tornillos y para 1 tornillo. Aunque igual lunati puede venderte la leva de un solo tornillo.

No no conocia ese coche... tu no perteneces al foro del club de coches americanos de españa ?
http://cccae.mforos.com/

dude.....do I want to try that?  :icon_smile_big:

LOL, well, the first one didn't came out really good
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Al

Quote from: firefighter3931 on May 06, 2011, 12:41:20 PM
The 284/484 is way too much cam for a mild 383 with stock converter and 3.23 gears....not surprising to hear it's giving you grief !  :brickwall:

These are 2 descent cams that would run much better in your setup ;

(1) Lunati 302 VooDoo grind

(2) Crower HDP271

I've recommended both to members here and allways with excellent results.  :2thumbs:

Ron



I totally agree, I chose (1) and am very pleased with the results.
Al
1968 Dodge Charger, 383, UU1

WhiteOnGreen

 :cheers: Thank guys, in the end I have decided to buy the 302 Lunati cam and lifter kit  :2thumbs:

Al

Good choice, you'll like it !  :2thumbs:
1968 Dodge Charger, 383, UU1

WhiteOnGreen

Quote from: Nacho-RT74 on May 06, 2011, 05:36:18 PM
Quote from: TUFCAT on May 06, 2011, 02:51:30 PM
Quote from: Nacho-RT74 on May 06, 2011, 02:41:38 PM
hey tuff!!! using webtranslators ? LOL

Tranquilo, aqui no hay problemas con otros idiomas, ya tengo 10 años por aqui y a veces cuando entra alguien de habla hispana hablamos en castellanoalguna que otra cosa.

La leva LUNATI puede ser usada con los resortes stock, solo que si los tuyos tienen ya mucho uso igual es recomendable cambiarlos. De 100 a 110 libras a la altura de asiento es mas que suficiente. Los originales son como de 90 libras ( cuando son nuevos )

Kit de tiempo ( cadenas y piñones ) La Summit doble roller es buena especialmente para el uso que le vas a dar y es economica. La hay para tres tornillos y para 1 tornillo. Aunque igual lunati puede venderte la leva de un solo tornillo.

No no conocia ese coche... tu no perteneces al foro del club de coches americanos de españa ?
http://cccae.mforos.com/

dude.....do I want to try that?  :icon_smile_big:

LOL, well, the first one didn't came out really good

Yes, I am a member of the forum of CCCAE and although I have a little available{spare} time and it does to me great practical absence with English (apart from some translator who helps me very much  :lol:), I feel  more more comfortable in this forum.

PS:I send to you the link of the reportage that Elsa Pataky did with my Charger 

http://www.lasexta.com/sextatv/formula1/elsa_pataky_nos_lleva_al_cine_en_su_coche/420843

Nacho-RT74

Quote from: WhiteOnGreen on May 09, 2011, 01:54:38 PM
Quote from: Nacho-RT74 on May 06, 2011, 02:41:38 PM

No no conocia ese coche... tu no perteneces al foro del club de coches americanos de españa ?
http://cccae.mforos.com/

Yes, I am a member of the forum of CCCAE and although I have a little available{spare} time and it does to me great practical absence with English (apart from some translator who helps me very much  :lol:), I feel  more more comfortable in this forum.



Don't worry, me too, and on this case, the language doesn't make easier try to keep around at CCCAE. I have told them that there
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html