Comp cam 305 grind
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: Comp cam 305 grind (RichS)
Last I played with them..there was 4 models of the 305H cam...they differed in lobe seperation, with the tight one being for all out small block bracket racing. Any which way....they are all rough idle low vacuum hmid-high RPM horsepower cams.
I do not think they are well suited to an EFI engine. In fact...your vacuum will bounce so much...the computer probably won't be able to run unless you do tricks with the calibration to ignore just about everything at idle except for TPS voltage. Not a fun thing to try and tune I wouldn't think.
I do not think they are well suited to an EFI engine. In fact...your vacuum will bounce so much...the computer probably won't be able to run unless you do tricks with the calibration to ignore just about everything at idle except for TPS voltage. Not a fun thing to try and tune I wouldn't think.
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: Comp cam 305 grind (BBA)
http://www.racenet.net/missing.php3?...alvetrain.php3 These cams are made for the LT1/LT4 motors. The 305 is a little bigger than the Hot cam. The 306 looks a little big.
Safety Car
Joined: Nov 1999
Posts: 3,891
Likes: 2
From: Houston, TX
Re: Comp cam 305 grind (RichS)
The 305 and the 306 are pretty good cams. The idle is lumpy in the 306, but very livable. I drove mine every day for a a year and a half. My vaccuum does not bounce around bad at all. If you tune it right and have your TB set correctly, you should not have a problem at all.
Let me know if I can help you with one of these.
Let me know if I can help you with one of these.
Melting Slicks
Joined: Aug 2001
Posts: 2,047
Likes: 0
Re: Comp cam 305 grind (RichS)
Custom tuning is a definite when going with a cam such as this. The A/F ratio will be totally whacked with a "standard" chip or aftermarket. Low vacuum? Not a big deal. I don't have any problems with mine short of... when cruising in 6th gear ~65mph for an extended period, the ECM will set an EGR code because the vacuum doesn't match up with something related to the speed... don't know quite what it was, but as soon as I checked my troubleshooting guide, it smacked me in the face. The car barely pulls vacuum at idle and 1200rpm isn't much better... nope, no vacuum leaks.
Top end power? Wow! Look out... I've got the TPIS ZZ9x cam and the specs are similar. It'll rev easily over 6k with the fortified valve train, etc.
Top end power? Wow! Look out... I've got the TPIS ZZ9x cam and the specs are similar. It'll rev easily over 6k with the fortified valve train, etc.
Safety Car
Joined: Mar 2000
Posts: 4,847
Likes: 10
From: Bartlett, IL
Cruise-In XI Veteran
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Re: Comp cam 305 grind (EricVonHa)
I have a couple of friends running the CC305 cam, very similar performance to the Hot Cam, maybe a little more choppy at idle. The CC 306 Cam is awesome up top but your low end will sufer alot. 4.10+ gears are a must with the CC306, I was thinking about doing the 306 in my car but a buddy of mine said its not worth giving up the low end for what you gain in the top end, he said his car was very hard to lauch on street tires....Bog or Burn
Mike
Mike
Instructor
Joined: Feb 2001
Posts: 211
Likes: 0
From: Chicago ILL
Re: Comp cam 305 grind (MVR 155)
I personally like the Extreme Energy line of cams. Last year I used the 230/236 cam. The idle was excellent and it made power all the way up to 6500.
The Extreme line of cams has Comps newest profiles. I had no problem passing emmissions with this cam. You won't be disappointed.
By the way, this year I'm using an Extreme Energy Solid Roller. Great street manners and idle but still pulls to 7200!
The Extreme line of cams has Comps newest profiles. I had no problem passing emmissions with this cam. You won't be disappointed.
By the way, this year I'm using an Extreme Energy Solid Roller. Great street manners and idle but still pulls to 7200!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Safety Car
Joined: Nov 1999
Posts: 3,891
Likes: 2
From: Houston, TX
Re: Comp cam 305 grind (BBA)
Hmmm...Ok 2fast, for some reason, I believe you 
How much tuning did you have to do to get the computer working with the 305/306 cams?
How much tuning did you have to do to get the computer working with the 305/306 cams?
I personally like the Extreme Energy line of cams. Last year I used the 230/236 cam. The idle was excellent and it made power all the way up to 6500.
The Extreme line of cams has Comps newest profiles. I had no problem passing emmissions with this cam. You won't be disappointed.
By the way, this year I'm using an Extreme Energy Solid Roller. Great street manners and idle but still pulls to 7200!
The Extreme line of cams has Comps newest profiles. I had no problem passing emmissions with this cam. You won't be disappointed.
By the way, this year I'm using an Extreme Energy Solid Roller. Great street manners and idle but still pulls to 7200!
Our custom cams fall somewhere inbetween there in agressiveness. They were designed to give maximum street drivability as well as power. There were a lot of cam doctor reports examined and a lot of trial and error before the lobes were finalized.
Now the solid roller series is awesome! I cannot say enough about the solid roller setup. It is a little more money upfront, but well worth the power, drivability, emissions, etc. !!!
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: Comp cam 305 grind (RichS)
I ran the 305 cam in my 396. I had no problems with vacuum or idle and I actually thought it was quite mild. It had gobs of torque but a lot of that has to do with the extra cubes. I am converting to a solid roller setup and sold the 305 cam to a forum member that is putting it in a 350 LT1.
Drifting
Joined: Feb 1999
Posts: 1,771
Likes: 33
From: Bradenton Florida
Re: Comp cam 305 grind (Vette92)
2fast
I was running the 236-242(same as hi-tech5) soid roller. I had some dist issues. I just upgraded now to a 248/248 (adv 288/288) .615 lift wit h1.6rr.
Yes you can hear this cam. Drives really well though. (running a 7730 ecm)
Still have not done a vacum guage test. but kpa readings are about 68kpa. I would eatimate roughly 10"
My only problem is idle. still messing with the idle programming and TB. I am shooting for a 900 idle. Any lower will lose vacum. At 825 I was at 75kpa. Also a little to rough of a idle.
Will be attending the RT 66 this weekend and gettting some 1/4 times. Will post results .
Dennis
I was running the 236-242(same as hi-tech5) soid roller. I had some dist issues. I just upgraded now to a 248/248 (adv 288/288) .615 lift wit h1.6rr.
Yes you can hear this cam. Drives really well though. (running a 7730 ecm)
Still have not done a vacum guage test. but kpa readings are about 68kpa. I would eatimate roughly 10"
My only problem is idle. still messing with the idle programming and TB. I am shooting for a 900 idle. Any lower will lose vacum. At 825 I was at 75kpa. Also a little to rough of a idle.
Will be attending the RT 66 this weekend and gettting some 1/4 times. Will post results .
Dennis
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: Comp cam 305 grind (MVR 155)
I have a couple of friends running the CC305 cam, very similar performance to the Hot Cam, maybe a little more choppy at idle. The CC 306 Cam is awesome up top but your low end will sufer alot. 4.10+ gears are a must with the CC306, I was thinking about doing the 306 in my car but a buddy of mine said its not worth giving up the low end for what you gain in the top end, he said his car was very hard to lauch on street tires....Bog or Burn
Mike
Mike
Safety Car
Joined: Mar 1999
Posts: 3,602
Likes: 170
From: Toronto, Canada
Re: Comp cam 305 grind (Vette92)
I ran the 305 cam in my 396. I had no problems with vacuum or idle and I actually thought it was quite mild. It had gobs of torque but a lot of that has to do with the extra cubes. I am converting to a solid roller setup and sold the 305 cam to a forum member that is putting it in a 350 LT1.
RichS, why not go with a solid roller cam? You can get the same idle quality as a hot cam and make the same or more power than a cc306. If I could do it over again that would be my choice, LT4heads,solid roller,4.27gears :jester
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: Comp cam 305 grind (95vettski)
I was thinking about a solid roller setup also. I'm torn :confused: I need more info about the solid setup. I'm not to woried about reseting lash once a year or so just the drivability.
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Comp cam 305 grind (RichS)
Rich, saturday at the track you may want to talk to Julio from Cartek about the comp cam he had built for my motor. He also had the computor program he developed for my car on the dyno to work with it. A form of this could be downloaded in your car. John
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: Comp cam 305 grind (2FST4U)
John, I thought Cartek sent out there computers. I'll have to talk to him Sat. I just don't want to put the wrong parts in the car. I was happy with the 95 but want a bit more :D It's a disease hehe
Safety Car
Joined: Mar 1999
Posts: 3,602
Likes: 170
From: Toronto, Canada
Re: Comp cam 305 grind (RichS)
I was thinking about a solid roller setup also. I'm torn :confused: I need more info about the solid setup. I'm not to woried about reseting lash once a year or so just the drivability.
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: Comp cam 305 grind (95vettski)
Chris, what size roller are you going with?
So far it has cost me about $1800-$2000 just in new parts for the changeover from hydraulic, but it could be done for quite a bit cheaper if you used some cheaper parts. I am using the EndureX lifters, and some Tool Steel springs, with lash caps, spring cups, new titanium retainers, steel 1.52 roller rockers. It is necessary to machine down the springs seats in the heads to accomodate a little larger outside diameter spring for the solid roller, so you have to add some machine work costs for the heads.
Safety Car
Joined: Mar 1999
Posts: 3,602
Likes: 170
From: Toronto, Canada
Re: Comp cam 305 grind (Vette92)
Chris, what size roller are you going with?
Not a monster cam, but it is a 240/250, .617/.625 w/1.52 RR (.649/.658 w/1.6rr) on a 114 lobe separation. It has made almost 470 NA rear wheel on a similar setup as mine. Also maintains quite a bit of streetability. I am looking forward to getting the motor back with the new pistons and check out how this baby is going to run with my heads.
Not a monster cam, but it is a 240/250, .617/.625 w/1.52 RR (.649/.658 w/1.6rr) on a 114 lobe separation. It has made almost 470 NA rear wheel on a similar setup as mine. Also maintains quite a bit of streetability. I am looking forward to getting the motor back with the new pistons and check out how this baby is going to run with my heads.