cam question
Thread Starter
Racer
Joined: Jul 2009
Posts: 350
Likes: 7
From: springstead wi
cam question
this what I know . I have in my vet a late 1970 truck block . I have world sportsman 2 heads 202 160 angle plugs , cam dynamics cam and 1.5 rockers with 11 to 1 speed pro pistons . on top a torker 2 ( thinking of changing to performer)intake and in process of setting up a quick fuel rt-680-vs with fuel pressure gauge and regulator . I don't really remember what the cam is , but the numbers 488/504 seem to stick in my head from 25 years ago .
if I decide to change the cam what would get the most pop out of it for mainly street ( I live in the country) right now without spinning the tires I get 0 to 60 in just under 5 seconds but that could be off a little the way id did it is close but it could go a couple 10th one way or the other .
change cam so I know what I have or just work with what I have and change the intake ?
if I decide to change the cam what would get the most pop out of it for mainly street ( I live in the country) right now without spinning the tires I get 0 to 60 in just under 5 seconds but that could be off a little the way id did it is close but it could go a couple 10th one way or the other .
change cam so I know what I have or just work with what I have and change the intake ?
Drifting
Joined: Oct 2005
Posts: 1,615
Likes: 150
From: Forth Worth TX
this what I know . I have in my vet a late 1970 truck block . I have world sportsman 2 heads 202 160 angle plugs , cam dynamics cam and 1.5 rockers with 11 to 1 speed pro pistons . on top a torker 2 ( thinking of changing to performer)intake and in process of setting up a quick fuel rt-680-vs with fuel pressure gauge and regulator . I don't really remember what the cam is , but the numbers 488/504 seem to stick in my head from 25 years ago .
if I decide to change the cam what would get the most pop out of it for mainly street ( I live in the country) right now without spinning the tires I get 0 to 60 in just under 5 seconds but that could be off a little the way id did it is close but it could go a couple 10th one way or the other .
change cam so I know what I have or just work with what I have and change the intake ?
if I decide to change the cam what would get the most pop out of it for mainly street ( I live in the country) right now without spinning the tires I get 0 to 60 in just under 5 seconds but that could be off a little the way id did it is close but it could go a couple 10th one way or the other .
change cam so I know what I have or just work with what I have and change the intake ?
Thread Starter
Racer
Joined: Jul 2009
Posts: 350
Likes: 7
From: springstead wi
what's your point ? not trying to write a book to sell . my computer changed it to vet and I didn't catch it , if that's what your referring to . if its something else you need to find something to do , because you do nothing for my post .have a wonderful day .
Race Director
Joined: Aug 2004
Posts: 10,628
Likes: 132
From: Duvall, WA
He's just saying that it would really help us to read and understand your issue if you could use proper punctuation, capitalization, grammar and spelling. Interpreting your original message is a chore. Take the extra time to make it right so that we don't have to translate.
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
Cam Dynamics was bought out by Crane Cams years ago and some of cam grinds from CD were kept by Crane. You could call Crane in Daytona Beach and ask them if they can help identify your 488/504 lift cam......will be a long shot however. May have to pull the cam if you really want to know what you have but if you like the cam why bother!!
Le Mans Master
Joined: May 2007
Posts: 5,009
Likes: 1,116
From: North tonawanda NY
A dual plane intake like the performer or rpm should help with street driving torque quite a bit... Single plane intakes shine at high rpms at the cost of low end torque. They are mainly for engines with big cams that see high rpms
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
Last edited by augiedoggy; Jul 31, 2015 at 08:38 PM.
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
A dual plane intake like the performer or rpm should help with street driving torque quite a bit... Single plane intakes shine at high rpms at the cost of low end torque. They are mainly for engines with big cams that see high rpms
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
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Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
A dual plane intake like the performer or rpm should help with street driving torque quite a bit... Single plane intakes shine at high rpms at the cost of low end torque. They are mainly for engines with big cams that see high rpms
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
Thread Starter
Racer
Joined: Jul 2009
Posts: 350
Likes: 7
From: springstead wi
Thanks.
The 0 to 60 is at 700 rpm in gear . If I start at 1500 it barks the tires . at 2000 it spins them .
The only reason I am asking about the cam is because it bothers me not knowing what cam I have in it , and if I decide to pull it why not change it if there is something better . But I am leaning towards just changing the intake . Probably one of the performer types .
I also have another question back in the late 80s when I built the engine for the second time I had a 3.08 gear and a holley 750 double pumper . I was playing around and brake torqued to almost 3000 , when I jumped on it I blew out both back axles , blew both shafts right at the u-joints wide open by the wheels and also twisted the shafts . what would cause that .
The 0 to 60 is at 700 rpm in gear . If I start at 1500 it barks the tires . at 2000 it spins them .
The only reason I am asking about the cam is because it bothers me not knowing what cam I have in it , and if I decide to pull it why not change it if there is something better . But I am leaning towards just changing the intake . Probably one of the performer types .
I also have another question back in the late 80s when I built the engine for the second time I had a 3.08 gear and a holley 750 double pumper . I was playing around and brake torqued to almost 3000 , when I jumped on it I blew out both back axles , blew both shafts right at the u-joints wide open by the wheels and also twisted the shafts . what would cause that .
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
brake torqued to almost 3000 , when I jumped on it I blew out both back axles , blew both shafts right at the u-joints wide open by the wheels and also twisted the shafts . what would cause that .
Crane Cam's had this grind years ago too called Crane "Blazer" Camshaft. They offered it on 112° and 114° but on a 106° custom grind it made killer power for a HFT. It was 300/310 @.004" tappet lift
Burning Brakes
Joined: Nov 2011
Posts: 1,170
Likes: 201
From: Willoughby Ohio
Another possibility is that you have the Blue Racer cam pn 975888.
The specs are:
234 @ .05 intake,244 @ .05 exhaust
Advertised duration 300/310
114 lsa
.488/.510 lift
rpm range 2800 to 6500 rpm
If this is your cam switching to the dual plane will hurt the car's performance.Are you using the cast iron sportsman head?If you are I would not put less cam in it because it will probably cause detonation problems with pump gas with the iron heads.A stall converter is also listed as mandatory for this cam.
Hope this helps.
The specs are:
234 @ .05 intake,244 @ .05 exhaust
Advertised duration 300/310
114 lsa
.488/.510 lift
rpm range 2800 to 6500 rpm
If this is your cam switching to the dual plane will hurt the car's performance.Are you using the cast iron sportsman head?If you are I would not put less cam in it because it will probably cause detonation problems with pump gas with the iron heads.A stall converter is also listed as mandatory for this cam.
Hope this helps.
Thread Starter
Racer
Joined: Jul 2009
Posts: 350
Likes: 7
From: springstead wi
cast iron sportsman heads . I had a stall converter put in . thought is was a 3000 . I don't have the paper work on part numbers on the cam or the converter . So I am not really sure it was 30 years ago .
the first cam I put in was a cam dynamics with a 350 350 hp rebuild kit . I wasn't happy with it and had a clicking sound in the motor so when I took it apart we went to the sportsman heads , the 11 to 1 pistons , the torker intake and a crane cam (found the install papers on the cam there dated 1985 but no part numbers )
the first cam I put in was a cam dynamics with a 350 350 hp rebuild kit . I wasn't happy with it and had a clicking sound in the motor so when I took it apart we went to the sportsman heads , the 11 to 1 pistons , the torker intake and a crane cam (found the install papers on the cam there dated 1985 but no part numbers )
Racer
Joined: Mar 2013
Posts: 298
Likes: 2
From: Orange Park Florida
Do you know how much vacuum your pulling at 1000 rpm. That might help defining cam specs. I agree with the cam swap. Camshaft technology have come a long way since then. Just my 2 cents.
Last edited by Corvette400hp; Aug 2, 2015 at 07:21 PM.
Burning Brakes
Joined: Jun 2011
Posts: 816
Likes: 11
From: lewisburg wv
A dual plane intake like the performer or rpm should help with street driving torque quite a bit... Single plane intakes shine at high rpms at the cost of low end torque. They are mainly for engines with big cams that see high rpms
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
BTW despite your non perfect grammar, I had no issues reading your post... Some people would rather poke fun than be helpful I guess... The wonderful thing about a forum is their are people of all ages with very diverse backgrounds participating.. Some people forget that or are just intolerant of it I guess...
Thread Starter
Racer
Joined: Jul 2009
Posts: 350
Likes: 7
From: springstead wi
should be getting the fuel line , pressure gauge , regulator , and throttle springs tonight . so I will be able to install my new carb in the next couple days . I am trying to find a vacuum gauge for that . if I do I will check the vacuum pressure .
