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New carb recommendation #1582471 02/22/14 06:48 PM 02/22/14 06:48 PM
Joined: Jan 2003 Posts: 3,329 Melbourne, FL dwbiggs OP super gas
dwbiggs OP super gas Joined: Jan 2003 Posts: 3,329 Melbourne, FL	Time to upgrade my carb...given the specs on my car...in sig...what would be a good performance carb over the 80508 Holley I have on it. Never changed anything on present carb...it runs well but figured I could get something more tunable for better idle and performance. Thanks!

Re: New carb recommendation [Re: dwbiggs] #1582472 02/22/14 06:52 PM 02/22/14 06:52 PM
Joined: Mar 2005 Posts: 3,142 Central NC gch master
gch master Joined: Mar 2005 Posts: 3,142 Central NC	Probably runs pretty well but I may consider a 950hp vacuum secondary with the 3,55's.I am sure I am in the minority.Most will recommend a double pumper and that will work fine also. Try to borrow an 850 and see if the car like it.

Re: New carb recommendation [Re: dwbiggs] #1582473 02/22/14 07:24 PM 02/22/14 07:24 PM
Joined: Jan 2003 Posts: 5,485 SoCal Brian Hafliger master
Brian Hafliger master Joined: Jan 2003 Posts: 5,485 SoCal	Quote: Time to upgrade my carb...given the specs on my car...in sig...what would be a good performance carb over the 80508 Holley I have on it. Never changed anything on present carb...it runs well but figured I could get something more tunable for better idle and performance. Thanks! Can you fit a 1" open spacer under the current carb? Or 1/2" spacer? It will clean up the fuel curve of that 850, and you could just KIT the carb. Brian Brian Hafliger

Re: New carb recommendation [Re: Brian Hafliger] #1582474 02/22/14 08:08 PM 02/22/14 08:08 PM
Joined: May 2004 Posts: 952 Stockholm, Sweden MrSixpack super stock
MrSixpack super stock Joined: May 2004 Posts: 952 Stockholm, Sweden	I just love Thermoquads, I have convinced some of my friends to try them and thay also loves them But they need some tweeking before they run like I want them to run. Just saying 1970 Super Stock Challenger ex. Paul Rossi 1968 Dodge Dart GT 340 1968 Dodge Charger /6 3 speed manual 1966 Chrysler 300 Loaded 1968 Dodge Charger R/T 440 1968 Mini Cooper

Re: New carb recommendation [Re: MrSixpack] #1582475 02/22/14 10:12 PM 02/22/14 10:12 PM
Joined: Oct 2003 Posts: 339 Wisconsin B BIGS enthusiast
BIGS enthusiast B Joined: Oct 2003 Posts: 339 Wisconsin	Just seems fitting that I should build ya a new carb considering what your last name is....Just Saying..... .Jesse Jesse & Lynn BIGS Performance Products Building Street/Strip Carburetors since 1974 www.bigsperformance.com

Re: New carb recommendation [Re: BIGS] #1582476 02/22/14 11:18 PM 02/22/14 11:18 PM
Joined: May 2004 Posts: 12,388 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,388 Taxes & Virus's R-US, NY	Quick Fuel Annular 950 '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: New carb recommendation [Re: dwbiggs] #1582477 02/22/14 11:32 PM 02/22/14 11:32 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	A 950 DP will work great on that

Re: New carb recommendation [Re: MR_P_BODY] #1582478 02/23/14 12:59 AM 02/23/14 12:59 AM
Joined: Jan 2003 Posts: 3,329 Melbourne, FL dwbiggs OP super gas
dwbiggs OP super gas Joined: Jan 2003 Posts: 3,329 Melbourne, FL	Wow...950? Guess I am kinda under carbed

Re: New carb recommendation [Re: dwbiggs] #1582479 02/23/14 01:41 AM 02/23/14 01:41 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Wow...950? Guess I am kinda under carbed A 750 came stock on a 340.. I think you have a touch more than a stock 340.... dont ya think

Re: New carb recommendation [Re: dwbiggs] #1582480 02/23/14 01:57 AM 02/23/14 01:57 AM
Joined: Dec 2004 Posts: 149 OH, USA T Torred member
Torred member T Joined: Dec 2004 Posts: 149 OH, USA	I started out with a 750 DP on a very similar combo. I replaced it with a 950 HP DP from Bigs, adjusted the idle and it performed flawlessly. Last edited by Torred; 02/23/14 02:01 AM.

Re: New carb recommendation [Re: dwbiggs] #1582481 02/23/14 02:43 PM 02/23/14 02:43 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Quote: Time to upgrade my carb...given the specs on my car...in sig...what would be a good performance carb over the 80508 Holley I have on it. Never changed anything on present carb...it runs well but figured I could get something more tunable for better idle and performance. Thanks! The 80508 is a 750 vac secondary w/ electric choke, right? - Do you still want / need a carb w/ choke capability? - Where does it idle now and what issue do you have with it? - Have you tried different vac secondary springs out to see how they change how the carb performs? - Have you switched to add-on secondary metering block to allow jetting changes? - Are you just looking for it to be more "peppy" on the street, rather than trying to reduce your ETs at the track? Depending upon your answers, you might want to contact AED in Richmond about converting it to 4-corner idle and re-tuning it based on their own carb work. If you're not looking to chop your ETs down, a better tune w/ that 80508 might be all you need. BTW, glad you put the heads you bought from me to good use. Last edited by BradH; 02/23/14 04:22 PM.

Re: New carb recommendation [Re: BradH] #1582482 02/23/14 03:19 PM 02/23/14 03:19 PM
Joined: Jan 2003 Posts: 5,989 Anoka County, MN L Leigh master
Leigh master L Joined: Jan 2003 Posts: 5,989 Anoka County, MN	I averaged 10.50's with a 3310, on my 388" small block. A 80496 averaged 10.40's, and the verdict is out on the 8082.

Re: New carb recommendation [Re: Leigh] #1582483 02/23/14 04:57 PM 02/23/14 04:57 PM
Joined: Jul 2006 Posts: 4,319 Puyallup, WA S StealthWedge67 master
StealthWedge67 master S Joined: Jul 2006 Posts: 4,319 Puyallup, WA	Go to Holley.com, and use their carb-calculator. Their advise is going to be better than most of ours. LemonWedge - Street heavy / Strip ready - 11.07 @ 120

Re: New carb recommendation [Re: StealthWedge67] #1582484 02/23/14 05:26 PM 02/23/14 05:26 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Go to Holley.com, and use their carb-calculator. Their advise is going to be better than most of ours. That is used for sizing a carb to a production engine... if we used that no one would be running quicker than stock... every time I increase the carb size I go quicker and faster... right now I run a 1050 dom on a 405ci.. if I were to follow that calculator I would need maybe a 750

Re: New carb recommendation [Re: MR_P_BODY] #1582485 02/23/14 08:19 PM 02/23/14 08:19 PM
Joined: Jan 2003 Posts: 3,329 Melbourne, FL dwbiggs OP super gas
dwbiggs OP super gas Joined: Jan 2003 Posts: 3,329 Melbourne, FL	Quote: BTW, glad you put the heads you bought from me to good use. Hey Brad...yes I remember getting those heads from you... like 6-7 years ago...surprised you remembered. In Florida now. Quote: The 80508 is a 750 vac secondary w/ electric choke, right? It is - Do you still want / need a carb w/ choke capability? Not essential - Where does it idle now and what issue do you have with it? It will idle OK but I figured with a more tunable carb I could get a smoother idle...have VA it ported, may try full vacuum port - Have you tried different vac secondary springs out to see how they change how the carb performs? Years ago I think - Have you switched to add-on secondary metering block to allow jetting changes? No - Are you just looking for it to be more "peppy" on the street, rather than trying to reduce your ETs at the track? strictly street Car runs great...may just try the metering block you speak of and maybe a proform main body perhaps? Last edited by dwbiggs; 02/23/14 08:31 PM.

Re: New carb recommendation [Re: dwbiggs] #1582486 02/23/14 08:39 PM 02/23/14 08:39 PM
Joined: Jan 2003 Posts: 3,329 Melbourne, FL dwbiggs OP super gas
dwbiggs OP super gas Joined: Jan 2003 Posts: 3,329 Melbourne, FL	Hey stealth...where did your post go...was replying to it and it said it was deleted? 11.84...impressive, how you got it set up?

Re: New carb recommendation [Re: dwbiggs] #1582487 02/23/14 08:47 PM 02/23/14 08:47 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	You need 3 of them for it run run well duh.. really just get another Holley. The HP series ae very nice. Maybe jump up to an 850. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: New carb recommendation [Re: Mr.Yuck] #1582488 02/23/14 10:16 PM 02/23/14 10:16 PM
Joined: Jan 2003 Posts: 3,329 Melbourne, FL dwbiggs OP super gas
dwbiggs OP super gas Joined: Jan 2003 Posts: 3,329 Melbourne, FL	Quote: You need 3 of them for it run run well duh.. I really would like to get a six pack but after looking at the prices... Thought I paid too much when I paid 1500.00 for a set of Pontiac trips. Last edited by dwbiggs; 02/23/14 10:18 PM.

Re: New carb recommendation [Re: dwbiggs] #1582489 02/24/14 12:36 AM 02/24/14 12:36 AM
Joined: Jul 2006 Posts: 4,319 Puyallup, WA S StealthWedge67 master
StealthWedge67 master S Joined: Jul 2006 Posts: 4,319 Puyallup, WA	Quote: Hey stealth...where did your post go...was replying to it and it said it was deleted? 11.84...impressive, how you got it set up? Not sure.... My computer went dead while I was editing it, now its gone. ?? My post was replying to Mikes (Mr P-Body) post. I put your general specs through the Holley website carb selector, and came up with an 870 cfm vacuum secondary carb, or an 850 mechanical carb, both of which seem spot on to me for your car. Mike knows his stuff, and I will generally read with eyes wide open everything he writes. In this case, I think we need to keep in mind that you're not asking for Race Car advice. As I understand it, this is a strong running street car that may see the strip now & then (??). With a tight converter and 3.55 gears, I may tend to stick with a vacuum secondary carb, and the 870 is probably a great choice. Regarding my car, Its a .040 over 400 / 451 combo, and I run an 830-cfm Race series double pumper. But I also run a 9-1/2 converter and 3.91 gears. It may be a little faster with a bigger carb, but it has real crisp throttle response, and runs great on the street with the 830. Last edited by StealthWedge67; 02/24/14 12:40 AM. LemonWedge - Street heavy / Strip ready - 11.07 @ 120

Re: New carb recommendation [Re: Brian Hafliger] #1582490 02/24/14 12:48 AM 02/24/14 12:48 AM
Joined: Jan 2003 Posts: 11,711 Portage,michigan B B3422W5 I Live Here
B3422W5 I Live Here B Joined: Jan 2003 Posts: 11,711 Portage,michigan	Quote: Quote: Time to upgrade my carb...given the specs on my car...in sig...what would be a good performance carb over the 80508 Holley I have on it. Never changed anything on present carb...it runs well but figured I could get something more tunable for better idle and performance. Thanks! Can you fit a 1" open spacer under the current carb? Or 1/2" spacer? It will clean up the fuel curve of that 850, and you could just KIT the carb. Brian Yep... Great thought. For it being a street car and not an all out race application, it's unlikely that any carb swap would effect performance significantly enough to feel it in the seat of the pants. So why throw money at something that isn't broke and most likely won't make a noticeable difference. Kit up the carb you have. 69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8

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