Re: Do I have enough carb for my motor?
[Re: greenpigs]
#906001
01/17/11 07:58 PM
01/17/11 07:58 PM
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Joined: Apr 2007
Posts: 375 NE Oklahoma
71valiant
OP
enthusiast
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OP
enthusiast
Joined: Apr 2007
Posts: 375
NE Oklahoma
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Quote:
300 HP at the wheels in a civic is going to be hard to beat if he hooks up.
One of those weigh...2500 lbs or so & figure 2700 "race" weight unless he gutted it.
So that is a LOW 12 sec ride if he has all his ducks in a row.
I doubt it. We shall see. My prediction is I beat him by half a second. I have doubts just putting a turbo on a honda civic makes a low 12s car. He's got alot more things that have to go right than I do. My car runs good and is consistant. He's still working the bugs out of his and he has to drive a stick shift and he better get it right out of the hole and not miss a shift!
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Re: Do I have enough carb for my motor?
[Re: BSB67]
#906003
01/17/11 08:43 PM
01/17/11 08:43 PM
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Joined: Apr 2007
Posts: 375 NE Oklahoma
71valiant
OP
enthusiast
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OP
enthusiast
Joined: Apr 2007
Posts: 375
NE Oklahoma
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Quote:
Have a friend that had a 13.0 sec. 340 E Body. Best et and mph was with a 750 DP on a LD340 intake.
That said, there is probably something else amiss for the AFB to be a full second slower than the 750 IMO.
Yeah I agree, but it runs, starts , idles and pulls normal. No surging like it's lean or anything of that nature. I just doubt that the motor is starving that bad on a 625cfm carb. Gota be something to it.
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Re: Do I have enough carb for my motor?
[Re: joedust451]
#906004
01/17/11 08:57 PM
01/17/11 08:57 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
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Nope.... 750DP w/ 28 squirtters, 72-78's and It'll get it done.
I disagree, not for any mild 360, its just too much carb
My mild 340 swinger had one of those Carter 625 comp carbs on it. ran fine. I had a 750HP on the shelf. Drop it on w/ 28's and light jetting and it ran killer. went form 14.20 to 13.80 and had zero effect on mpg or drivability. Holley 750's are VERY easy to tune and work on almosty every application. He has more cubes more cam and btter heads. A 750D tuned will work great. Now a 70 will too but you can't swing a dead cat at a swap met and not hit a 750 for sale.
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Re: Do I have enough carb for my motor?
[Re: 71valiant]
#906005
01/17/11 08:59 PM
01/17/11 08:59 PM
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Joined: Jan 2003
Posts: 5,270 Missouri
MY340
master
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master
Joined: Jan 2003
Posts: 5,270
Missouri
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750cfm is perfect for your combo as you found out in your ET comparisons.
Ma Mopar used the large 1-1/2" primary bore big block 850cfm TQ's on their 74 360hp motors in A,B & E bodies.
1970 FE5 Duster 360/904/3.91's SOLD
1973 TB3 SpaceDuster 340/4spd/4.10's SOLD
Moparless for now but when the opportunity is right I'll have another one.
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Re: Do I have enough carb for my motor?
[Re: Chilort]
#906008
01/17/11 11:05 PM
01/17/11 11:05 PM
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Joined: Apr 2007
Posts: 375 NE Oklahoma
71valiant
OP
enthusiast
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OP
enthusiast
Joined: Apr 2007
Posts: 375
NE Oklahoma
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Smaller carbs have better throttle response. Most daily driving is done with part throttle. So yeah they would be better for that. Quote:
I have this same question but don't want to hijack the post. ... but might try anyway....
440, 9.2:1 compression, Eddy heads, Performer RPM, Lunati 60303 cam, full length headers w/ full 2.5" exhaust.
I bought a Holley 750 (80508S) when I had a stock 440.
Now I think I need an 850.
But it is street driven and I've always been under the assumption that the smaller carb helps street manners.
Last edited by 71valiant; 01/17/11 11:22 PM.
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Re: Do I have enough carb for my motor?
[Re: 71valiant]
#906010
01/17/11 11:47 PM
01/17/11 11:47 PM
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Joined: Jul 2008
Posts: 30,486 Florida STAYcation
dOc …
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,486
Florida STAYcation
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Quote:
Smaller carbs have better throttle response. Most daily driving is done with part throttle. So yeah they would be better for that.
And what is the BESTest ferr dat ? ... the Plastic-Fantastic ...
DON'T be a Berry-Bum ... join the ThermoSquad !
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Re: Do I have enough carb for my motor?
[Re: 71valiant]
#906012
01/17/11 11:59 PM
01/17/11 11:59 PM
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Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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i have a friend who has gone 10.79 @ 120+ with a 68 Barracuda 340 with the Carter AVS and stock cast iron intake.
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: Do I have enough carb for my motor?
[Re: 71valiant]
#906013
01/18/11 12:24 AM
01/18/11 12:24 AM
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Joined: Jul 2006
Posts: 4,179 California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Yeah I agree, but it runs, starts , idles and pulls normal. No surging like it's lean or anything of that nature. I just doubt that the motor is starving that bad on a 625cfm carb. Gota be something to it.
you can be right on for idle and cruise, and completely off for power on these carbs. it isn't tuned correctly, and needs to be if you decide not to switch to a holley. there are at least 1000 different opinions on these carbs, but my experience has shown me that a really good carter tuner can make the car run just as well as really good holley tuner.
now whether the car wants more that 625 cfm, that's another issue.
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Re: Do I have enough carb for my motor?
[Re: Mr.Yuck]
#906014
01/18/11 03:50 AM
01/18/11 03:50 AM
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Joined: Feb 2005
Posts: 5,221 Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
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Nope.... 750DP w/ 28 squirtters, 72-78's and It'll get it done.
I disagree, not for any mild 360, its just too much carb
My mild 340 swinger had one of those Carter 625 comp carbs on it. ran fine. I had a 750HP on the shelf. Drop it on w/ 28's and light jetting and it ran killer. went form 14.20 to 13.80 and had zero effect on mpg or drivability. Holley 750's are VERY easy to tune and work on almosty every application. He has more cubes more cam and btter heads. A 750D tuned will work great. Now a 70 will too but you can't swing a dead cat at a swap met and not hit a 750 for sale.
13.80s is all you got out of that Swinger, Any holley DPer is easy to tune, that has nothing to do with it, If your happy running high 13s with your 750dp in your Swinger thats cool, i'll take running 12.5s with a 650dp on a mild 360 in my Swinger .
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Re: Do I have enough carb for my motor?
[Re: 71valiant]
#906015
01/18/11 03:57 AM
01/18/11 03:57 AM
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Joined: Feb 2005
Posts: 5,221 Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Quote:
300 HP at the wheels in a civic is going to be hard to beat if he hooks up.
One of those weigh...2500 lbs or so & figure 2700 "race" weight unless he gutted it.
So that is a LOW 12 sec ride if he has all his ducks in a row.
I doubt it. We shall see. My prediction is I beat him by half a second. I have doubts just putting a turbo on a honda civic makes a low 12s car. He's got alot more things that have to go right than I do. My car runs good and is consistant. He's still working the bugs out of his and he has to drive a stick shift and he better get it right out of the hole and not miss a shift!
Good luck either way, but if this guy does his homework & makes a clean pass you'll have a race on your hands, I hope you win, just don't under estimate these Civics, I know the mild ones around at our track will eat you for lunch, especially if you don't run faster then a 13.0
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Re: Do I have enough carb for my motor?
[Re: GTX MATT]
#906016
01/18/11 04:09 AM
01/18/11 04:09 AM
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Joined: Feb 2005
Posts: 5,221 Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Quote:
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If its a stock engine internally enough boost to make any power will turn it into a grenade.
Not neccessarily. They don't need much to make them move, good clutch set-up & axles/sticky tires/exhaust ect. & they can run 12s all day on a small boost. Heres a link, notice how fast the Neon runs with stock internals, & the weight too, they weigh about like a civic.
http://www.honda-tech.com/showthread.php?t=2884128
NOW, look at the HP & weight of this civic, its not insane by any means, look at the ET & MPH, not trying to burst bubbles here, just proving a point on reality, i've aslso includeing a Neon, yeah & thats a Mopar.
http://www.honda-tech.com/showthread.php?t=2871521
Last edited by joedust451; 01/18/11 04:32 AM.
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Re: Do I have enough carb for my motor?
[Re: joedust451]
#906017
01/18/11 04:33 AM
01/18/11 04:33 AM
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Joined: Jun 2006
Posts: 5,166 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,166
CT
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Quote:
Quote:
If its a stock engine internally enough boost to make any power will turn it into a grenade.
Not neccessarily. They don't need much to make them move, good clutch set-up & axles/sticky tires/exhaust ect. & they can run 12s all day on a small boost. Heres a link, notice how fast the Neon runs with stock internals, & the weight too, they weigh about like a civic.
http://www.honda-tech.com/showthread.php?t=2884128
Yeah but thats an SRT-4 engine, which came with a turbo. I dont know what a civic has for a compression ratio but i'm sure its at least 9.5:1. We'll say that maybe it will take 7 lbs of boost safely, that might make 275 to the crank as a best cast scenario, depending on what engine they started with, so we're talking more like 225 to the wheels, not 300.
Civics are not only the butt end of our jokes, they are the butt end of jokes from the tuner crowd too, and for good reason. You can not make them fast and hold up without spending insane amounts of money. I know guys who spent 8K on an engine to run 13.50s in a 2600 lb car. Can you make them fast? Yes. But you will spend way more than you would to make a better car as fast.
The guys dropping 8K on an engine to run 13.50s could easily have bought an LT1 or LS1 GM product and done a gear swap and run faster, with more potential to improve. They also could have bought a car that came with a turbo, like a WRX, and just done bolt ons and cranked up the boost. I know the tuner cars are very capable from working on them. You can make them VERY fast. Hondas are not tuner cars though, they are just cars. With the cost involved with making them run and hold up its like guys are removing the valve cover and literally pouring money into the engines. And lets not forget, to make them really run you have to get an engine all built up to take the boost, then spend a few thousand to turbo it.
Back on topic do whatever makes it fastest. If you can't tune the Carter to come close to the times the Holley makes it run then the answer is no you don't.
Last edited by GTX MATT; 01/18/11 04:45 AM.
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Re: Do I have enough carb for my motor?
[Re: GTX MATT]
#906019
01/18/11 10:59 AM
01/18/11 10:59 AM
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Joined: Feb 2005
Posts: 5,221 Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Quote:
Quote:
If its a stock engine internally enough boost to make any power will turn it into a grenade.
Not neccessarily. They don't need much to make them move, good clutch set-up & axles/sticky tires/exhaust ect. & they can run 12s all day on a small boost. Heres a link, notice how fast the Neon runs with stock internals, & the weight too, they weigh about like a civic.
http://www.honda-tech.com/showthread.php?t=2884128
Yeah but thats an SRT-4 engine, which came with a turbo. I dont know what a civic has for a compression ratio but i'm sure its at least 9.5:1. We'll say that maybe it will take 7 lbs of boost safely, that might make 275 to the crank as a best cast scenario, depending on what engine they started with, so we're talking more like 225 to the wheels, not 300.
Civics are not only the butt end of our jokes, they are the butt end of jokes from the tuner crowd too, and for good reason. You can not make them fast and hold up without spending insane amounts of money. I know guys who spent 8K on an engine to run 13.50s in a 2600 lb car. Can you make them fast? Yes. But you will spend way more than you would to make a better car as fast.
The guys dropping 8K on an engine to run 13.50s could easily have bought an LT1 or LS1 GM product and done a gear swap and run faster, with more potential to improve. They also could have bought a car that came with a turbo, like a WRX, and just done bolt ons and cranked up the boost. I know the tuner cars are very capable from working on them. You can make them VERY fast. Hondas are not tuner cars though, they are just cars. With the cost involved with making them run and hold up its like guys are removing the valve cover and literally pouring money into the engines. And lets not forget, to make them really run you have to get an engine all built up to take the boost, then spend a few thousand to turbo it.
Back on topic do whatever makes it fastest. If you can't tune the Carter to come close to the times the Holley makes it run then the answer is no you don't.
Who are your kidden, they don't sink any more into there cars then we do, but obviously you must be an exspert on imports ..
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Re: Do I have enough carb for my motor?
[Re: Chilort]
#906020
01/18/11 11:07 AM
01/18/11 11:07 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I have this same question but don't want to hijack the post. ... but might try anyway....
440, 9.2:1 compression, Eddy heads, Performer RPM, Lunati 60303 cam, full length headers w/ full 2.5" exhaust.
I bought a Holley 750 (80508S) when I had a stock 440.
Now I think I need an 850.
But it is street driven and I've always been under the assumption that the smaller carb helps street manners.
??? I ran a Proformed 750 on a bossted 440. and it was plenty. Fatten it up and you'll be fine.
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