Re: thermoquad VS. Holley 750 DP
[Re: HYPER8oSoNic]
#1031767
07/17/11 08:10 AM
07/17/11 08:10 AM
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Joined: Jan 2003
Posts: 6,389 nielsville, minn.
quickd100
master
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master
Joined: Jan 2003
Posts: 6,389
nielsville, minn.
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Thermoquad, Holley, they're both fuel delivery devices. Both have their good points and falts. They both can be set up to scream or fall on their faces. Holleys main advantage is numbers, there are more of them, and way more aftermarket parts available for them. The Thermoquad was the high water mark for Carter, one Rochester engineer once said the Thermoquad was the next step in development after the quadrajet. I have Holleys sitting on the shelf from 600cfm units all the way up to 1140cfm and I use them too. I really like the Thermoquad, they're CHEAP, give good mileage, and make great power, and are easy to modify. I can take a 850 thermoquad and modify it and it will run great on a 318 to a stroker Hemi. One day when I get caught up I'll do some back to back dyno tests with a Thermoquad vs. Holleys. Dave
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Re: thermoquad VS. Holley 750 DP
[Re: Mcode69]
#1031768
07/17/11 09:47 AM
07/17/11 09:47 AM
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Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
Performance Only
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
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Quote:
It's the same reason most morons are into chevs, they just don't know any better! And apart form all this what about all the other problems holleys have, the stripped out threads, the baseplates that are made out of cheese, the fact that the basic design with all the leaks and all the other problems is out of the 50's, the fact that in warm weather they wont start when hot because they boiled over when you turned the engine off, this is a classic, holley couldn't fix it so they gave it a name... "flash boil" the fact that a tiny spec of dirt gets in them and they go haywire. I could go on and on if you guys are happy with junk so be it!
so i guess what should be taken from this thread is what? most morons like chevies and only a select few people in the world know how to tune a thermoquad? i've been playing with cars since the 1960's and as i recall, by then the holley 4150's and 4160's had been out for quite some time. the TQ didn't arrive until around 1969. during the years to follow i don't recall many (if any) people touting the TQ as the greatest carb on earth like i see in this thread today. i wonder why that is? to think no one could ever tune one properly would be a ludicrous thought. the argument that they just weren't as popular without an explanation is just crazy talk. if the argument is that they didn't make as many carbs as holley did, well, that's true, but why? if they were the latest and greatest, Carter surely would have made more. right? they must have some inherent drawback that caused their demise. not only did Chrysler Corporation give up on them, but also the performance crowd of the 70's and 80's etc. so now you'd have one believe that they really are all that and a bag of chips 40+ years later. hasn't history taught us this lesson already? i've owned a few thermoquads over the years and they performed as well as one could expect. okay mileage, no bogs, etc etc. the fact is none of them ever performed as well as a comparable sized 4150 holley. i never cared for the fact that the primary's are so small that you'd have to put the pedal half way to the floor to get the same acceleration as a 4150 does at less than 1/4 throttle. i never cared for that quadrajet sound of the secondary's opening. some thought it sounded cool, although i didn't. it was mostly noise to me. every car i ever had with a thermoquad eventually got replaced with a holley. the cars drove better and were always faster at the race track. perhaps those are just some of the reasons the thermoquads went the way of the dinosaur. oh, and by the way, don't tell me about holleys that have stripped bolt holes or leaks. we all know what caused the threads to strip out. maybe we can talk about cracked and leaking phenolic carb bodies instead, or some of the other inherent design flaws of the lately much revered thermoquad, or maybe you'd rather not...
machine shop owner and engine builder
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Re: thermoquad VS. Holley 750 DP
[Re: Performance Only]
#1031769
07/17/11 10:20 AM
07/17/11 10:20 AM
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Joined: Mar 2005
Posts: 2,172 Ohio
theclutcher
top fuel
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top fuel
Joined: Mar 2005
Posts: 2,172
Ohio
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Why not have the best of both worlds. The spreadbore Holley 6210. Now everyone can be happy, not to mention it is a great carb... dbl pumper with 50 cc on secondary, tuneable with small primary.
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Re: thermoquad VS. Holley 750 DP
[Re: Performance Only]
#1031771
07/17/11 01:15 PM
07/17/11 01:15 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Why didn't the factory engineers put the Holley 750 DP on high performance engines. It was readily available at the time.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: thermoquad VS. Holley 750 DP
[Re: Performance Only]
#1031772
07/17/11 01:34 PM
07/17/11 01:34 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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Quote:
Quote:
It's the same reason most morons are into chevs, they just don't know any better! And apart form all this what about all the other problems holleys have, the stripped out threads, the baseplates that are made out of cheese, the fact that the basic design with all the leaks and all the other problems is out of the 50's, the fact that in warm weather they wont start when hot because they boiled over when you turned the engine off, this is a classic, holley couldn't fix it so they gave it a name... "flash boil" the fact that a tiny spec of dirt gets in them and they go haywire. I could go on and on if you guys are happy with junk so be it!
so i guess what should be taken from this thread is what? most morons like chevies and only a select few people in the world know how to tune a thermoquad? i've been playing with cars since the 1960's and as i recall, by then the holley 4150's and 4160's had been out for quite some time. the TQ didn't arrive until around 1969. during the years to follow i don't recall many (if any) people touting the TQ as the greatest carb on earth like i see in this thread today. i wonder why that is? to think no one could ever tune one properly would be a ludicrous thought. the argument that they just weren't as popular without an explanation is just crazy talk. if the argument is that they didn't make as many carbs as holley did, well, that's true, but why? if they were the latest and greatest, Carter surely would have made more. right? they must have some inherent drawback that caused their demise. not only did Chrysler Corporation give up on them, but also the performance crowd of the 70's and 80's etc. so now you'd have one believe that they really are all that and a bag of chips 40+ years later. hasn't history taught us this lesson already? i've owned a few thermoquads over the years and they performed as well as one could expect. okay mileage, no bogs, etc etc. the fact is none of them ever performed as well as a comparable sized 4150 holley. i never cared for the fact that the primary's are so small that you'd have to put the pedal half way to the floor to get the same acceleration as a 4150 does at less than 1/4 throttle. i never cared for that quadrajet sound of the secondary's opening. some thought it sounded cool, although i didn't. it was mostly noise to me. every car i ever had with a thermoquad eventually got replaced with a holley. the cars drove better and were always faster at the race track. perhaps those are just some of the reasons the thermoquads went the way of the dinosaur. oh, and by the way, don't tell me about holleys that have stripped bolt holes or leaks. we all know what caused the threads to strip out. maybe we can talk about cracked and leaking phenolic carb bodies instead, or some of the other inherent design flaws of the lately much revered thermoquad, or maybe you'd rather not...
The TQ was only canned by chrysler because carter went out of buisness due to poor managment, the q-jet filled in for a year and then EFI came out and no more carbs. When the TQ came out it replaced all the holleys, mabey the holleys were so good they just had to replace it with a worse carb When I raced my 66 dart I tried a bunch of different holley carbs and holley style carbs and none had a performance advantage over a t-quad but they all sucked more gas (BTW a 770 street avenger was the closest MPG and ran the same 1/8th mile times) I wish Holley would make an anular booster all aluminum version of the 770 street avenger, it would probably be able to get similar MPG and the only time you would waste fuel is when you change jets. Any one with 1/2 a brain can look down the throat of a carb and see witch one atomizes the fuel better and the TQ does a much better job and that is the real reason they get better MPG, like was mentioned holley covers up the bad transitions by dumping in more fuel. The reason no one ran TQs back in the day is they were convinced it was an emmision piece of junk, same reason no one liked 360s or 400s, no matter how good it was people think it is an emmision only item in spite of the fact they have more potential than the predasessor .
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: thermoquad VS. Holley 750 DP
[Re: feets]
#1031773
07/17/11 01:40 PM
07/17/11 01:40 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:
Why didn't the factory engineers put the Holley 750 DP on high performance engines. It was readily available at the time.
because it was more expensive????? I never said that MPG's wouldn't be better w/ a TQ, however if he has a DP now and it's running well. why muck w/ it? He'll have to BUY a TQ either pay somebody to set it up, or tune it himself and I doubt he'd get more tha 1 maybe 2 mpg's around town better.
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Re: thermoquad VS. Holley 750 DP
[Re: Performance Only]
#1031774
07/17/11 01:43 PM
07/17/11 01:43 PM
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Joined: Sep 2004
Posts: 6,906 IL, Aurora
ademon
master
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master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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Quote:
Quote:
It's the same reason most morons are into chevs, they just don't know any better! And apart form all this what about all the other problems holleys have, the stripped out threads, the baseplates that are made out of cheese, the fact that the basic design with all the leaks and all the other problems is out of the 50's, the fact that in warm weather they wont start when hot because they boiled over when you turned the engine off, this is a classic, holley couldn't fix it so they gave it a name... "flash boil" the fact that a tiny spec of dirt gets in them and they go haywire. I could go on and on if you guys are happy with junk so be it!
so i guess what should be taken from this thread is what? most morons like chevies and only a select few people in the world know how to tune a thermoquad? i've been playing with cars since the 1960's and as i recall, by then the holley 4150's and 4160's had been out for quite some time. the TQ didn't arrive until around 1969. during the years to follow i don't recall many (if any) people touting the TQ as the greatest carb on earth like i see in this thread today. i wonder why that is? to think no one could ever tune one properly would be a ludicrous thought. the argument that they just weren't as popular without an explanation is just crazy talk. if the argument is that they didn't make as many carbs as holley did, well, that's true, but why? if they were the latest and greatest, Carter surely would have made more. right? they must have some inherent drawback that caused their demise. not only did Chrysler Corporation give up on them, but also the performance crowd of the 70's and 80's etc. so now you'd have one believe that they really are all that and a bag of chips 40+ years later. hasn't history taught us this lesson already? i've owned a few thermoquads over the years and they performed as well as one could expect. okay mileage, no bogs, etc etc. the fact is none of them ever performed as well as a comparable sized 4150 holley. i never cared for the fact that the primary's are so small that you'd have to put the pedal half way to the floor to get the same acceleration as a 4150 does at less than 1/4 throttle. i never cared for that quadrajet sound of the secondary's opening. some thought it sounded cool, although i didn't. it was mostly noise to me. every car i ever had with a thermoquad eventually got replaced with a holley. the cars drove better and were always faster at the race track. perhaps those are just some of the reasons the thermoquads went the way of the dinosaur. oh, and by the way, don't tell me about holleys that have stripped bolt holes or leaks. we all know what caused the threads to strip out. maybe we can talk about cracked and leaking phenolic carb bodies instead, or some of the other inherent design flaws of the lately much revered thermoquad, or maybe you'd rather not...
I dont think many auto makers were using Holleys on much after 1971 or even before that, Carter was always on most GM and Mopars, they needed something that would hold the correct A/F ratio, so in came the QJ and TQ until throttle body injection. Also your statement about Chysler giving up on the thermoquad makes no sense, did they go to bolting up 800/850 Holleys in the mid 80's??? When it comes down to it the QJ and TQ are coming back into favor due to there flexibility and also some guys like to be different. Holley will always be on the majority of hot rods but its more interesting to see a the QJ/TQ getting it done
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Re: thermoquad VS. Holley 750 DP
[Re: HotRodDave]
#1031775
07/17/11 01:57 PM
07/17/11 01:57 PM
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Joined: Mar 2008
Posts: 571 Western NC
68Bullit
mopar
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mopar
Joined: Mar 2008
Posts: 571
Western NC
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Quote:
Quote:
Quote:
It's the same reason most morons are into chevs, they just don't know any better! And apart form all this what about all the other problems holleys have, the stripped out threads, the baseplates that are made out of cheese, the fact that the basic design with all the leaks and all the other problems is out of the 50's, the fact that in warm weather they wont start when hot because they boiled over when you turned the engine off, this is a classic, holley couldn't fix it so they gave it a name... "flash boil" the fact that a tiny spec of dirt gets in them and they go haywire. I could go on and on if you guys are happy with junk so be it!
so i guess what should be taken from this thread is what? most morons like chevies and only a select few people in the world know how to tune a thermoquad? i've been playing with cars since the 1960's and as i recall, by then the holley 4150's and 4160's had been out for quite some time. the TQ didn't arrive until around 1969. during the years to follow i don't recall many (if any) people touting the TQ as the greatest carb on earth like i see in this thread today. i wonder why that is? to think no one could ever tune one properly would be a ludicrous thought. the argument that they just weren't as popular without an explanation is just crazy talk. if the argument is that they didn't make as many carbs as holley did, well, that's true, but why? if they were the latest and greatest, Carter surely would have made more. right? they must have some inherent drawback that caused their demise. not only did Chrysler Corporation give up on them, but also the performance crowd of the 70's and 80's etc. so now you'd have one believe that they really are all that and a bag of chips 40+ years later. hasn't history taught us this lesson already? i've owned a few thermoquads over the years and they performed as well as one could expect. okay mileage, no bogs, etc etc. the fact is none of them ever performed as well as a comparable sized 4150 holley. i never cared for the fact that the primary's are so small that you'd have to put the pedal half way to the floor to get the same acceleration as a 4150 does at less than 1/4 throttle. i never cared for that quadrajet sound of the secondary's opening. some thought it sounded cool, although i didn't. it was mostly noise to me. every car i ever had with a thermoquad eventually got replaced with a holley. the cars drove better and were always faster at the race track. perhaps those are just some of the reasons the thermoquads went the way of the dinosaur. oh, and by the way, don't tell me about holleys that have stripped bolt holes or leaks. we all know what caused the threads to strip out. maybe we can talk about cracked and leaking phenolic carb bodies instead, or some of the other inherent design flaws of the lately much revered thermoquad, or maybe you'd rather not...
The TQ was only canned by chrysler because carter went out of buisness due to poor managment, the q-jet filled in for a year and then EFI came out and no more carbs. When the TQ came out it replaced all the holleys, mabey the holleys were so good they just had to replace it with a worse carb When I raced my 66 dart I tried a bunch of different holley carbs and holley style carbs and none had a performance advantage over a t-quad but they all sucked more gas (BTW a 770 street avenger was the closest MPG and ran the same 1/8th mile times) I wish Holley would make an anular booster all aluminum version of the 770 street avenger, it would probably be able to get similar MPG and the only time you would waste fuel is when you change jets. Any one with 1/2 a brain can look down the throat of a carb and see witch one atomizes the fuel better and the TQ does a much better job and that is the real reason they get better MPG, like was mentioned holley covers up the bad transitions by dumping in more fuel. The reason no one ran TQs back in the day is they were convinced it was an emmision piece of junk, same reason no one liked 360s or 400s, no matter how good it was people think it is an emmision only item in spite of the fact they have more potential than the predasessor .
Spell check seemed to be bypassed on this one but at any rate.....I agree with it....and I'll add to it by saying that now we have information that can be shared by the stroke of a keyboard which enables us to more parts, more tuneability, and all around more reason to use a good carburetor like the TQ. There wasn't an information age back in the 70's-80's like there is now and because of this the TQ has come back and IS recognized as a good carb. Many on here will still want a Holley no matter what, but that doesn't make the TQ a bad carb. Again, I have both, and I like both.......
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Re: thermoquad VS. Holley 750 DP
[Re: HYPER8oSoNic]
#1031778
07/17/11 08:22 PM
07/17/11 08:22 PM
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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:
Not talking about the air door, alot of what your saying has nothing to do with what i said , not trying too be a jerk, just saying.
Never SAID you were one!! The air door, I brought up as well as the venturies. They are of a more efficient design than the Holleys', that's MY point I was getting at, AFTER agreeing with the post!! I just said MY .
Gotcha
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Re: thermoquad VS. Holley 750 DP
[Re: Performance Only]
#1031780
07/17/11 10:55 PM
07/17/11 10:55 PM
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Joined: Nov 2009
Posts: 2,275 Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
Quote:
It's the same reason most morons are into chevs, they just don't know any better! And apart form all this what about all the other problems holleys have, the stripped out threads, the baseplates that are made out of cheese, the fact that the basic design with all the leaks and all the other problems is out of the 50's, the fact that in warm weather they wont start when hot because they boiled over when you turned the engine off, this is a classic, holley couldn't fix it so they gave it a name... "flash boil" the fact that a tiny spec of dirt gets in them and they go haywire. I could go on and on if you guys are happy with junk so be it!
so i guess what should be taken from this thread is what? most morons like chevies and only a select few people in the world know how to tune a thermoquad? i've been playing with cars since the 1960's and as i recall, by then the holley 4150's and 4160's had been out for quite some time. the TQ didn't arrive until around 1969. during the years to follow i don't recall many (if any) people touting the TQ as the greatest carb on earth like i see in this thread today. i wonder why that is? to think no one could ever tune one properly would be a ludicrous thought. the argument that they just weren't as popular without an explanation is just crazy talk. if the argument is that they didn't make as many carbs as holley did, well, that's true, but why? if they were the latest and greatest, Carter surely would have made more. right? they must have some inherent drawback that caused their demise. not only did Chrysler Corporation give up on them, but also the performance crowd of the 70's and 80's etc. so now you'd have one believe that they really are all that and a bag of chips 40+ years later. hasn't history taught us this lesson already? i've owned a few thermoquads over the years and they performed as well as one could expect. okay mileage, no bogs, etc etc. the fact is none of them ever performed as well as a comparable sized 4150 holley. i never cared for the fact that the primary's are so small that you'd have to put the pedal half way to the floor to get the same acceleration as a 4150 does at less than 1/4 throttle. i never cared for that quadrajet sound of the secondary's opening. some thought it sounded cool, although i didn't. it was mostly noise to me. every car i ever had with a thermoquad eventually got replaced with a holley. the cars drove better and were always faster at the race track. perhaps those are just some of the reasons the thermoquads went the way of the dinosaur. oh, and by the way, don't tell me about holleys that have stripped bolt holes or leaks. we all know what caused the threads to strip out. maybe we can talk about cracked and leaking phenolic carb bodies instead, or some of the other inherent design flaws of the lately much revered thermoquad, or maybe you'd rather not...
We can spend ALL DAY AND NIGHT posting about both the Holleys' and the TQs' weaknesses. Sure NEITHER one is perfect, in design nor in performance and efficiency. Bottom line, it comes down to the matter of which type carb works BEST for the combo at hand .
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: thermoquad VS. Holley 750 DP
[Re: ScottSmith_Harms]
#1031781
07/17/11 11:55 PM
07/17/11 11:55 PM
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Joined: Mar 2005
Posts: 2,172 Ohio
theclutcher
top fuel
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top fuel
Joined: Mar 2005
Posts: 2,172
Ohio
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Quote:
Several of each, how deep is your wallet?
My wallet is so deep, you can see Russia when looking at the bottom of it.
Good to see somebody has 'em stashed.... like hens teeth.
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Re: thermoquad VS. Holley 750 DP
[Re: ScottSmith_Harms]
#1031782
07/18/11 12:04 AM
07/18/11 12:04 AM
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Joined: Jul 2008
Posts: 30,424 Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
not the best street manors.
....kind-of 'splains most Berri-Crabs ..
Pig fat, fouling spark-plugs and the air, washing cyl walls .... SHALL I continue ? ..
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Re: thermoquad VS. Holley 750 DP
[Re: theclutcher]
#1031783
07/18/11 12:36 AM
07/18/11 12:36 AM
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Joined: Jan 2003
Posts: 42,714 Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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Quote:
My wallet is so deep, you can see Russia when looking at the bottom of it.
Good to see somebody has 'em stashed.... like hens teeth.
I have a few of them stashed, finding parts to restore them with is murder so I've grabbed all I could find for a while, I find 10 850's for every 1000, both are scarce but the 1000's are getting rediculous!
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