Carb choise question....
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Carb choice question....
Right now I am running a Thunder Series AVS 650cfm carb, edelbrock 2101 performer manifold (low rise. dual plane) and a Crane Blue Racer Cam on my 383.
Cam Specs:
.050 Duration: 224 deg Intake; 234 deg exhaust
Adv duration 298 deg intake 308 deg exhaust
Cam lift .310 intake and .325 exhaust
Valve lift: .465 intake and .488 exhaust
lobe center 107 deg intake and 117 deg exhaust
When I had the engine built by Jasper this is the carb they recommended so I trusted them and went with it. Well, I was going back and looking at the edelbrock carb chart:
http://www.jegs.com/pdfs/350carbchart.pdf
And the only recommend this carb up to 220 deg yet the duration on the cam is 224.
Is this the right carb for my application or should I consider something else?
One other thing to consider is I am at about 370hp/440ft-lbs and would like to get closer to 500 so is there something I can/should change to now that will also support that range?
Thanks
Shane
Cam Specs:
.050 Duration: 224 deg Intake; 234 deg exhaust
Adv duration 298 deg intake 308 deg exhaust
Cam lift .310 intake and .325 exhaust
Valve lift: .465 intake and .488 exhaust
lobe center 107 deg intake and 117 deg exhaust
When I had the engine built by Jasper this is the carb they recommended so I trusted them and went with it. Well, I was going back and looking at the edelbrock carb chart:
http://www.jegs.com/pdfs/350carbchart.pdf
And the only recommend this carb up to 220 deg yet the duration on the cam is 224.
Is this the right carb for my application or should I consider something else?
One other thing to consider is I am at about 370hp/440ft-lbs and would like to get closer to 500 so is there something I can/should change to now that will also support that range?
Thanks
Shane
Last edited by ShaneLU97; Sep 20, 2007 at 08:47 AM.
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
A couple of others things I forgot to mention....
Car had a TH400 when I put in the engine and have since switched to a TKO-500 5spd manual and also upgraded the rear to 3.5 gears. It appears to be recommended to go to mechanical secondaries with a manual transmission.
Car had a TH400 when I put in the engine and have since switched to a TKO-500 5spd manual and also upgraded the rear to 3.5 gears. It appears to be recommended to go to mechanical secondaries with a manual transmission.
Last edited by ShaneLU97; Sep 20, 2007 at 07:24 AM.
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
I know they are Darts but I will have to get home to find out exactly which ones. Will post this afternoon.
Just looked at some info I had on my computer and I am *pretty* sure they are Dart Iron Eagles SS
90% sure it is this head
http://store.summitracing.com/partde...w=1&N=700+150+
Just looked at some info I had on my computer and I am *pretty* sure they are Dart Iron Eagles SS
90% sure it is this head
http://store.summitracing.com/partde...w=1&N=700+150+
Last edited by ShaneLU97; Sep 20, 2007 at 09:45 AM.
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
What would you recommend?
Race Director
Joined: Oct 2000
Posts: 15,009
Likes: 79
From: central FL, near the beach.
search the archives for 383 combos.
get ideas
post questions
post more details on yours:
runner size
compression
exhaust
budget is necessary! one guy is willing to drop 5k, next only 500
get ideas
post questions
post more details on yours:
runner size
compression
exhaust
budget is necessary! one guy is willing to drop 5k, next only 500
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
I will post the additional information sometime tonight hopefully but at the very least I am would like to figure out if my carb is just wrong.
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Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Here's what I'd recommend:
1) either a 4779 or 80528 Holley carb (depending on your budget)
2) get rid of the Performer which is junk for any real perfornance setup
3) get a port matched Victor Jr., use a drop base filter setup. I did have a Victor Jr. with 1/2 inch spacer under a stock height hood, so I know it can be set up to fit. You are losing at least 15+ HP with that intake..
What exhaust setup do you have?
1) either a 4779 or 80528 Holley carb (depending on your budget)
2) get rid of the Performer which is junk for any real perfornance setup
3) get a port matched Victor Jr., use a drop base filter setup. I did have a Victor Jr. with 1/2 inch spacer under a stock height hood, so I know it can be set up to fit. You are losing at least 15+ HP with that intake..
What exhaust setup do you have?
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Here's what I'd recommend:
1) either a 4779 or 80528 Holley carb (depending on your budget)
2) get rid of the Performer which is junk for any real perfornance setup
3) get a port matched Victor Jr., use a drop base filter setup. I did have a Victor Jr. with 1/2 inch spacer under a stock height hood, so I know it can be set up to fit. You are losing at least 15+ HP with that intake..
What exhaust setup do you have?
1) either a 4779 or 80528 Holley carb (depending on your budget)
2) get rid of the Performer which is junk for any real perfornance setup
3) get a port matched Victor Jr., use a drop base filter setup. I did have a Victor Jr. with 1/2 inch spacer under a stock height hood, so I know it can be set up to fit. You are losing at least 15+ HP with that intake..
What exhaust setup do you have?
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
My initial question in the beginning of this thread was simply am I running the wrong carb for my current set-up, According to Edelbrock the carb is only good for durations up to 220 duration and mine is 224. Also changed from a auto trans to manual and my understanding is mechanical secondary seem to be recommended when hitched to a manual.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
You can pick those up on Ebay for around $50 or so and they really perform AND have better hood clearance than Victor Jr's's
http://cgi.ebay.com/ebaymotors/Vinta...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Edelb...spagenameZWDVW
I HIGHLY recommend those intakes for 383's.
P.S. I had very bad experience with vacuum secondaries cars as often the secondaries wouldn't open 100%.. That could've been fixed with different springs etc. but I didn't want to mess with it.. With a mech. secondaries carbe you always get WOT if your gas cable is adjusted properly
Last edited by GrandSportC3; Sep 20, 2007 at 11:05 AM.
Race Director
Joined: Oct 2000
Posts: 15,009
Likes: 79
From: central FL, near the beach.
My initial question in the beginning of this thread was simply am I running the wrong carb for my current set-up, According to Edelbrock the carb is only good for durations up to 220 duration and mine is 224. Also changed from a auto trans to manual and my understanding is mechanical secondary seem to be recommended when hitched to a manual.
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
i'm glad oliver is chiming in. I hate VS, and like Holley DP's stick or Auto. I wasn't sure what would fit. And i don't know the purpose of this car. Drags? Daily? The Edelbrock max 220 is likely for a 350. If the cam was to big,it would stall. Not too big on 383. i gather it runs ok, but u want more hp. good luck
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
The exhaust seems ok for your setup... I'd really recommend a mech. secondaries Holley.. I'd go with at least 750 cfm.. You can't go wrong with a little more cfm.. A well tuned 4779 or 80528 will get you great performance.. I'd definetely go with a open plane intake. One choice if you don't want to fit a Victor Jr. under the hood is a original Torker or TM-1 intake. I used to have a TM-1 with a 1/2 inch spacer on my old 383 and it would make more power with the TM-1 than with the Victor Jr. or Performer RPM.
You can pick those up on Ebay for around $50 or so and they really perform AND have better hood clearance than Victor Jr's's
http://cgi.ebay.com/ebaymotors/Vinta...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Edelb...spagenameZWDVW
I HIGHLY recommend those intakes for 383's.
P.S. I had very bad experience with vacuum secondaries cars as often the secondaries wouldn't open 100%.. That could've been fixed with different springs etc. but I didn't want to mess with it.. With a mech. secondaries carbe you always get WOT if your gas cable is adjusted properly
You can pick those up on Ebay for around $50 or so and they really perform AND have better hood clearance than Victor Jr's's
http://cgi.ebay.com/ebaymotors/Vinta...spagenameZWDVW
http://cgi.ebay.com/ebaymotors/Edelb...spagenameZWDVW
I HIGHLY recommend those intakes for 383's.
P.S. I had very bad experience with vacuum secondaries cars as often the secondaries wouldn't open 100%.. That could've been fixed with different springs etc. but I didn't want to mess with it.. With a mech. secondaries carbe you always get WOT if your gas cable is adjusted properly
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
I have a '73 hood (which is integrated into my tilt front) and I fit everything easily under the hood before I added the scoop... Your '73 small block hood is medium rise and has more space than earlier small block hoods..
Last edited by GrandSportC3; Sep 20, 2007 at 01:09 PM.
Race Director
Joined: Oct 2000
Posts: 15,009
Likes: 79
From: central FL, near the beach.
You can depend on Oliver
been there/done that.
.
I like the TM-1
1. 2 bolt patterns might come in handy
2. lower
3. cheap (if in good shape)
4. high power
5. sleeper-some think it is no good
been there/done that.
.
I like the TM-1
1. 2 bolt patterns might come in handy
2. lower
3. cheap (if in good shape)
4. high power
5. sleeper-some think it is no good
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
I personally followed MountainMotors advice (Curtis) to get a TM-1. He had been talking good about the old Torker style manifolds and I gave it a try.. I was very surprised that a 35+ year old intake would outperform modern intakes on certain applications... The TM-1 on my old 383 had some port matching and minor porting (cleaning up of casting imperfections) done but anybody with a Dremel will be able to do the same..
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Hey folks...Just got home and verfied with heads I have...
Dart Iron Eagle 180 w/ 74cc combustion chamber and 2.02 intake valve diameter
http://www.dartheads.com/manager/upl...IRON%20SBC.pdf
I really think I might have to go and pick up on of those intake manifolds especially at that price. I really think I should upgrade the carb anyway based on what I have been reading and what is another $50, right?
Dart Iron Eagle 180 w/ 74cc combustion chamber and 2.02 intake valve diameter
http://www.dartheads.com/manager/upl...IRON%20SBC.pdf
I really think I might have to go and pick up on of those intake manifolds especially at that price. I really think I should upgrade the carb anyway based on what I have been reading and what is another $50, right?