273 FAST cars?
#203515
01/24/09 11:59 PM
01/24/09 11:59 PM
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HotRodDave
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I was pondering buying a 65 dart GT and thinking through what could be done with it and thought a FAST car would be unique, obviously not the fastest ever but a 4 inch stroke crank could put it up to around 340 inches depending on final bore, could even go close to 360 with a 4.25 stroke and honda rod journals. Heads could be made to flow enough for 400 hp. It would be a pretty light car with a short-ish wheel base so mabey it could be made to be respectable.
What do you guys think?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: slantzilla]
#203518
01/25/09 12:17 AM
01/25/09 12:17 AM
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Posts: 7,131 Amarillo, Texas
BBR
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3 words:
Sucky exhaust manifolds.
Drag Week 2011 - 77th place - DD Drag Week 2012 - 2nd place SRBB N/A Drag Week 2014 - Kapooya RMRW 2018 RMRW 2020
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Re: 273 FAST cars?
[Re: BBR]
#203520
01/25/09 10:01 AM
01/25/09 10:01 AM
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Joined: Jan 2003
Posts: 2,511 Tampa , Fl
MoparJoe
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Quote:
3 words:
Sucky exhaust manifolds.
I've seen an early A pick up 1/2 sec and 5mph in the 1/8 by just swapping to a set of small headers. This was on a street 360 with stock heads, hyd cam and dual plane, nothing crazy where it would "need" a set of headers, that 90* bend and crimp in the manifold on the dr side kills it.
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Re: 273 FAST cars?
[Re: scatpacktom]
#203522
01/25/09 11:04 AM
01/25/09 11:04 AM
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HPMike
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Quote:
2 words...Do it
Listen to Tom, and just build it.
In FAST all entries have their shortcomings. It's all about doing the BEST you can with the entry you choose to bring. Not too long ago they said a FAST six pack big block wedge would never be able to make it into the elevens.
MB
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Re: 273 FAST cars?
[Re: HPMike]
#203523
01/25/09 12:47 PM
01/25/09 12:47 PM
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HotRodDave
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I thought I read in the rules one time you could not use a block that would take a bigger bore than stock?
Also would it be limited to a single exhaust?
I had a 360 in a 66 dart 4dr with 302 heads 273 manifolds and it ran a best of 9.43 in the 1/8th with a one leg 7.25 2.94 rear.
Could I run an 8.75 or 8.25, I think they only came with 7.25s in 65?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: HotRodDave]
#203524
01/25/09 02:02 PM
01/25/09 02:02 PM
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CJK440
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No, that overbore thing meant larger than the largest factory overbore of that engine family. A factory 340 or 360 is fine for a 273 car.
As for exhaust, thats a good question. The class is for high performance cars with a minimum of a 4 bbl carb and dual exhaust... Thats a question for the FAST tech guys.
You can run any axle offered by that manufacturer. Same goes for transmissions as long as its no more than 3 speeds for auto or 4 speed for stick.
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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Re: 273 FAST cars?
[Re: HotRodDave]
#203525
01/25/09 03:56 PM
01/25/09 03:56 PM
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Anonymous
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Anonymous
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Quote:
Could I run an 8.75 or 8.25, I think they only came with 7.25s in 65?
A few late 65's had 8 3/4 rears. Not sure if that was only in 4-speed cars.
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Re: 273 FAST cars?
#203526
01/25/09 04:23 PM
01/25/09 04:23 PM
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HotRodDave
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The one I am looking at has a 4spd and 7.25 rear.
Mabey the 7.25 could be made to survive with enough weight removal from the car and the puny tires. Any one make a spool or aftermarket axels? The weight saveings of the 7.25 could be an advantage it self.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: slantzilla]
#203528
01/25/09 05:32 PM
01/25/09 05:32 PM
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HotRodDave
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I made about 50 1/8th passes on my old 66 dart with a 7.25 and finaly broke the spiders drifting through an intersection WOT Mabey I could get someone with a lathe to turn out a locker? What about axels? Shot peen, cryo treat and hope for the best?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: slantzilla]
#203529
01/25/09 05:32 PM
01/25/09 05:32 PM
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Joined: Jan 2003
Posts: 7,475 Minnesota
Hemi_Joel
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Guys, this discussion is great, but if you are seriously thinking about competing, read the rules, then read them again. You can use ANY solid axle that ever came in a mopar, or a stock appearing aftermarket version. http://www.fastraces.org/I hope you build it, I think it would be a cool combo, and you would have alot of fun with it!
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: 273 FAST cars?
[Re: HotRodDave]
#203534
01/25/09 07:16 PM
01/25/09 07:16 PM
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JohnRR
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Quote:
I thought I read in the rules one time you could not use a block that would take a bigger bore than stock?
depends on the combo .
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Re: 273 FAST cars?
[Re: HotRodDave]
#203535
01/25/09 08:35 PM
01/25/09 08:35 PM
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fast68plymouth
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the killers for performance on a big cube motor in that combo are, the small carb, very small heads, small intake manifold, and poor exhaust.
while you can use any year or size OE block......the heads, intake manifold, and exhaust manifolds MUST be the correct pieces for the original combination. the carb doesnt have to be the correct part number, but it does have to at least start out as something that was the same size as original.......and in this case, that means "small".
trans and rear axles arent going to be the problem. making power with be the problem.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 273 FAST cars?
[Re: fast68plymouth]
#203536
01/26/09 12:31 AM
01/26/09 12:31 AM
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HotRodDave
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I just went back over there to look at the car and noticed how small the carb is and had to come back and read the rules. It is very small and I am sure it would be a big handy cap but NASCAR amateur hour (whatever it is called)makes some serious HP with a smaller carb. The rules state there will be a visual inspection with the air cleaner off, if I have the throat/venturi area ported bigger would that DQ me? Milling air horns is clearly out lawed so Can I install bigger throttle blades? Another big problem would be the 13 inch bycycle tires, if I was stuck with them (13s)there would be no point bothering to build the car. Were 14s optional on that car? Any one know how much a car like that weighs? I think they (early A-bodys)are light, that would be there big saveing grace, if they are heavier than they look that too could be a deal breaker. I am not thinking I can beat a certain black Hemi car but I don't want to show up and run a 14 second quarter either.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: HotRodDave]
#203537
01/26/09 12:37 AM
01/26/09 12:37 AM
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Posts: 14,492 So. Burlington, Vt.
fast68plymouth
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if thats what you want to build.....just build it.
how quick you could make something like that run is pure speculation until you build one and show up at the track with it.
my personal opinion is that its about as poor of a FAST combo as you could find........but opinions are just like....well....you know.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 273 FAST cars?
[Re: HotRodDave]
#203539
01/26/09 01:09 AM
01/26/09 01:09 AM
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Anonymous
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Quote:
Another big problem would be the 13 inch bicycle tires, if I was stuck with them (13s)there would be no point bothering to build the car. Were 14s optional on that car?
Yes, 14's were optional in 65.
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Re: 273 FAST cars?
#203540
01/26/09 09:24 AM
01/26/09 09:24 AM
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Hemi_Joel
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You could run G70-14's on 14x6 rims. You can bore out the carb as much as it will take.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: 273 FAST cars?
[Re: CJK440]
#203542
01/26/09 10:23 AM
01/26/09 10:23 AM
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Rapid340
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Mine weighs 3060 and I havent done much to reduce it.
1971 Factory Appearing Duster 340 11.000 @ 122 mph
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Re: 273 FAST cars?
[Re: CJK440]
#203543
01/26/09 10:35 AM
01/26/09 10:35 AM
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HPMike
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Quote:
Quote:
I believe a purpose built FAST Duster could weigh 3000 lbs without a driver.
2950 and not all that purpose built either.
That's pretty light, indeed. With the new build you should be putting some hurt on some of the "heavies".
MB
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Re: 273 FAST cars?
[Re: CJK440]
#203544
01/26/09 12:09 PM
01/26/09 12:09 PM
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dannysbee
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My weight was just a guess so with this input from owners I would think another 100 lbs at least could come off so we are at 2850 without a driver. We are starting from scratch so lets build a 72 Demon and take advantage of the snorkle scoop for some fresh air. A 416 inch engine should be able to make 1.15 Hp per cubic inch fairly easily which is 475 flywheel Hp. So with a 200 lbs driver we have a 3050 lbs car with 475-500 Hp. Your launching this 3050 lbs car on the same tire and wheel size that HemiJoel has run 10's on in a car that weighs at least 600 lbs more than this Demon. Could get very interesting. This package with 500 Hp and a 1.60 60'might run a 10.
Getting old just means you were smarter than some and luckier than others.
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Re: 273 FAST cars?
[Re: dannysbee]
#203545
01/26/09 01:13 PM
01/26/09 01:13 PM
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HotRodDave
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I am thinking the early a is a little lighter and shorter wheel base.
The only other reason I am think about this car is because it is complete and would need a lot of work and not as much money as buying a complete 340 car then modyfing it.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: HotRodDave]
#203547
01/26/09 05:03 PM
01/26/09 05:03 PM
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HotRodDave
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How do they decide if the idle sounds stock? Do they hook up a vacume gauge?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: B1Fish540]
#203548
01/26/09 05:09 PM
01/26/09 05:09 PM
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HotRodDave
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I just had another thought, I have a nice 318 short block SCAT I beams .030 KB167 pistons in my 68 cuda, has 302 heads right now. If those 273 heads are only going to flow enough to make say 450hp (could run 2.02 valves in a 318) might be just as well off useing that instead of building a huge inch motor that will make way too much tq any how. Mabey I will do some testing with that motor in that car before I yank it for it's own future stroker.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: HotRodDave]
#203549
01/26/09 05:54 PM
01/26/09 05:54 PM
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Joined: Jan 2006
Posts: 419 NY
F1Scamp
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Quote:
How do they decide if the idle sounds stock? Do they hook up a vacume gauge?
No vacuum gauge, it is more of an experience thing. I have heard a few cars that I and others felt didn't souund anything near stock, but it isn't up to us. I'm not sure if anyone has been called on it though.
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Re: 273 FAST cars?
[Re: HotRodDave]
#203550
01/26/09 07:03 PM
01/26/09 07:03 PM
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dannysbee
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I would'nt use a 340 car. I would use the straightest, rust free 6 cylinder car I could get my hands on. Strip it of all the undercoat and seam sealer. Delete the radio and heater. Bench seat auto on the column. I think you get the idea.
Getting old just means you were smarter than some and luckier than others.
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Re: 273 FAST cars?
[Re: HotRodDave]
#203551
01/26/09 07:58 PM
01/26/09 07:58 PM
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CJK440
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Quote:
I just had another thought, I have a nice 318 short block SCAT I beams .030 KB167 pistons in my 68 cuda, has 302 heads right now. If those 273 heads are only going to flow enough to make say 450hp (could run 2.02 valves in a 318) might be just as well off useing that instead of building a huge inch motor that will make way too much tq any how. Mabey I will do some testing with that motor in that car before I yank it for it's own future stroker.
I would guess, if you wanted to keep displacement low-er due to breathing issues you would still want the bigger bores of a 340/360.
Dwayne helped me out alot with my build(s) and other guys too. For the things he mentioned a 65 Dart isn't a world beater, and in bench racing isn't the best small block combo either. But then again, if you are looking to be top dog, you're barking up the wrong tree.
There are 2 guys who checked out deep into the 10's with the next fastest quite a bit behind, but we're all in it for fun. It would be cool to see something different on the track and I guarantee you'll really enjoy being a part of it.
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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Re: 273 FAST cars?
[Re: dannysbee]
#203554
01/26/09 10:59 PM
01/26/09 10:59 PM
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Joined: Nov 2003
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dannysbee
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1972 340 car in Top Banana, black bench seat, auto on the column.
Getting old just means you were smarter than some and luckier than others.
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Re: 273 FAST cars?
[Re: dannysbee]
#203555
01/26/09 11:07 PM
01/26/09 11:07 PM
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HotRodDave
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Yes, but you still have to buy 340 ex manifolds $$$ intake manifold $$$ thermoquad $$$ air cleaner $$$ probably a few other things for a 340 car $$$
I can buy this car complete with a nice air cleaner valve covers, carb, all the 4spd stuff, I have a short block that could handle whatever the top end can throw at it. Needs lower quarter patches, paint and some interior stuff and it could be drivable.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 FAST cars?
[Re: HotRodDave]
#203556
01/27/09 04:32 AM
01/27/09 04:32 AM
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jyrki
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Still, how about the exhaust? Is it limited to a single , or are duals allowed? And '66 D-Darts had headers, but itäs a "package car", so I have no idea wether itäs allowed or not. The early Darts have 111" wheelbase, just like the newer ones, and they have a pretty long rear over hang which might be good for the weight distributiön. However, the GT is not that light. Even though they are narrower than the new ones, they aren't any lighter and the Hard Top is the heaviest of the bunch. Most competitive would propably be a '64-'66 valiant 2 D sedan, with onyl 106" wheelbase and the same drivetrain available they have considerable more potential than the 300+ lbs heavier GT Dart. A 7 1/4" with a sure grip should work at least for a while, I had one behind a 340 and a manual and couldn't kill it. the open ones are a different story, the spider gears die within a few days, and when you weld it solid, the axles will break.
Plynouth VIP '67 TT IC EFI
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Re: 273 FAST cars?
[Re: jyrki]
#203557
01/27/09 09:08 AM
01/27/09 09:08 AM
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Joined: Nov 2003
Posts: 5,160 Texas
dannysbee
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No headers in FAST. The exhaust would have to go before the Board to see if duels would be allowed as the cars had a single exhaust from the factory.
Getting old just means you were smarter than some and luckier than others.
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