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  #1  
Old 01-14-2002, 11:19 PM
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bbaspense bbaspense is offline
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Default Carb Spacer

I just purchased a 1 inch open hole carb spacer ( I don't think the 2 inch would let my carb clear the hood)

Where will I notice the difference, bottom end or top end?

Engine to be used on:

400 stock piston, 494/292 cam, ported 452 heads, M-1 dual plane intake, windage tray 3000 converter, 1 3/4 headers

Best run of 12.97 @ 106 in a 3700 lb Aspen

Let me know what you think.
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  #2  
Old 01-14-2002, 11:35 PM
jelsr jelsr is offline
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Popular theory would be upper midrange and top end. The idea being the spacers' added volume "fools" the engine into thinking you are running a larger carb. The 4 holed ones are supposed to act like longer runners and aid the low end. Don't know who reads the engines mind to find this out!
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  #3  
Old 01-15-2002, 11:27 PM
HOLESHOT HOLESHOT is offline
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I think the engine will slow down.why the M1 doent like the added volume,but the track will tell keep us advised.
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  #4  
Old 01-16-2002, 08:56 AM
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Everyone I talked to before said that a spacer would help.... That's why I bought one...

I'll have to do some testing in the spring...

Does anyone else have a comparison on using a carb spacer and without..

Would it work better with a single plane intake?
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  #5  
Old 01-17-2002, 02:19 PM
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We have the stock M-1 on the crate motor. 12.70's without spacer. We added a 2in spacer and droped .05 but 3mph. Added the scoop and the car ran 12.50's all day. One of the guys we race with sells the 4hole ones. WE tried it for a couple of passes and the car never ran higher than 12.48. But that plate is $100 also. Plates are something you have to play around with. Sometimes they work better on one car/motor but not the other car/motor. I have also noticed the car stay more constant but droped mph by taking the plate off when it got into the 60's durning the night. So it is something you have to play around with.
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  #6  
Old 01-17-2002, 04:15 PM
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The carb spacer I bought was an open hole 1 inch...

I talked to a guy at a speed shop today and he said that I should have bought a 4 hole one. The open hole one is for a single plane. He said I will hurt bottom end torque when I use an open hole spacer on a dual plane.


Should I sell the open hole spacer and buy the 4 hole spacer.

The one I bought is phenolic not aluminum...I thought it would help to keep the carb cooler...

Jason
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  #7  
Old 01-17-2002, 08:07 PM
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Best thing I could tell you to do is try it out. Being phenolic I guess you payed some where around 25-30 for an open one? Which carb do you have. Mark sells his 4 hole phenolic 1in for something around 50.
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  #8  
Old 01-17-2002, 09:19 PM
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I'm running a 750 vacuum secondary 78/82 with a power valve plug. Not sure on shooter size or accel. pump cam..

I think my jetting is a little fat but during the cool weather in the fall I ran 3 tenths quicker than in the summer... I think I need to jet down a lot in the summer. I just left it alone.....

This year I'm gonna play with jetting.. accel pump cams and shooters.

I'm running an MSD 6A with an Accel coil for ignition. The distributor has a curve kit in it I run without vacuum advance.. 8 mm wires....
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  #9  
Old 01-17-2002, 10:32 PM
pro398 pro398 is offline
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Biggrin Super-sucker!?!?

Has anyone ever tryed one of those four hole Super-Sucker 1" spacers. I am currently running a Moroso 4 hole 1" spacer now,but supposedly these new spacers are even quicker.
Hey Dartman....have we met??
http://www.geocities.com/icm3459/
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  #10  
Old 01-17-2002, 10:51 PM
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So far I have not really got into carb jetting. But correct me if I am wrong about this but if you pick up alot at night or cool weather that means your running to rich? Again carbs is not something I have really had time to play around with.

Terry I would say no or I do not rember you untill I seen the site. Yes. I think we have talked at quaker last year and at the World Nats last year. Nice car. Have alwise like the action in Stock and S/S. We thought about running crate motor stock this year at some divionsal events untill IHRA gave us that chance for the bracket championship. So I guess we are going to run at 42 for weekly points. But the pro mod will be done next year and we want to make it to some national events this year. Good luck though next year. Hopfully we will run into each other again. Let us know how that new motor works out. We are looking for a building now to get back into custom race car and motor building. Hope to get into doing some of the magnum motors.
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  #11  
Old 01-18-2002, 02:16 AM
Gary Pavlovich Gary Pavlovich is offline
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Default To Jason re: 1" open spacer

Jason, Since you already own the spacer and it is a very simple process, just bolt it on and you will save yourself the guessing. Every engine is different. I have read many articles on spacers and the results vary between open hole/four hole, tapered/non-tapered...ad infinitum, even with the same test motor.
I run a 1" spacer on my 340 w/and Edelbrock LD 340 intake (dual plane with the center divider milled down) and I have tons of bottom end, mid, and top end power to 6500rpm.
I am sure you get the idea, to many variables between motors so try it out and let us (or me) know your results.
Take care,
Gary Pavlovich
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  #12  
Old 01-18-2002, 08:32 AM
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Thanks for all of the responses... I'm gonna give it a try in the spring..it should arrive in the mail in a few days

I'm just looking for a way to pick up a few and make the car more consistent...I'd like to see 12.70's and 13.0's in the summer..

Some things I'm considering..... A hood scoop, swapping the MSD 6A for a MSD 6 AL so I can put in a 2 step fro launch control, a decent set of slicks..... a race bucket..

I'm also gonna play with carbs... I do agree that I think I'm running too rich in the summer if I picked up that much and the plugs are a better colour in the fall.

I'm gonna go down to the track and swap carbs.. I'm gonna try my brothers 600 holley stock jets and his 780 that is jetted for a 327 Chev... it worked great on his 360 so I'm gonna give it a try on my Big Block...

Jason
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  #13  
Old 01-18-2002, 01:04 PM
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The scoope will help you out alot. Just make sure you making something to block off the air coming in from under the hood, that way all you are getting is fresh out side air. Check with your track about that 2 step. Most classes that alow 12 or 13sec cars do not allow 2 steps tranny brakes ect. Set of slicks or a good set of street slicks would be a mandtory also. When it comes to carbs we tell people that no matter what carb you try may not be better. The carb it self has to be jetted and adjusted around that motor car and that day that you are racing. The carb that is on the dragster now is 1100 dominator. Randy payed 600 for it new at summit. He came home tore it down and amost all of the internals went into the trash that night. He put eveything in that he knew what it was and souposely would be better than what was in it before.
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  #14  
Old 01-18-2002, 01:21 PM
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I'm running 26 x 8 x 15 stock car slicks right now..... I think they are getting a little hard so I was thinking of buying a new set. I've been using this set for 5 years now...

My Best 60 ft was a 1.85 ..that was leaving at 2200. I'm usually in the 1.90- 1.93 range.

I'm thinking of more converter this year . I'd like to leave near 3000 - 3500.

I'm shifting at 6000 and going through the traps at 5800....
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  #15  
Old 01-18-2002, 01:55 PM
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Wished our slicks would last 5 years. Ours are 26x10x15 and were bought at the benging of the season. We have close to 75 passes on them and the were wore out at around 50 or so. If we did a hard burnout we would run 12.50's. 12.60's if it was over 80 or the sun was right on the track for over 20 mins or so. If we did not do a hard burn out then we would run .60's and 70's in the heat. 60' was alwise around 1.69-1.71 with a best of 1.65. We would shift at 6500 and go through the traps at 5700.
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  #16  
Old 01-18-2002, 03:46 PM
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I'm quite surprised how long they have lasted.. They are a hard slick and take a big Burnout to heat them... They do get sticky though......

I have a buddy with a set and he has got a 1.78 60 ft out of them so I guess they can work..

I probably have 150 passes on them... I have 3 more sets but have never had to mount new ones 'cause these haven't wore down...

Maybe I should send you a set....lol
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  #17  
Old 01-18-2002, 03:55 PM
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hell why not? lol
We have alwise ran MT's or Goodyear. When Randy had the blower motor in the dragster they were 36x17x16 Goodyears. They would last for about 50 passes and were 400 a peice. The last couple times we took the Dart to the track this year the slicks were pretty hard so we figured that just do a lil bit harder burn out and they would make up a lil bit for it. Well it came to the point where they would get greasy like a street tire would and a hard burnout was actually hurting us. We had alot of problems with the car this year off the line wanting to get a lil swirley and around 1/8. We go most of it worked out by playing the air pressure. Next year if it is still their we are going to add some clamps and try clamping the back again to see if that helps any.
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  #18  
Old 01-19-2002, 09:17 AM
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I'm actually running A-body springs with the extension front hanger from MP. I did that so if I decided to go with SS springs I could just swap them in...

I played with clamping the front and really found no change. I moved the pinion snubber up and found no difference. My car is very heavy and with the Big Blcok in the front it gets hard to get it to transfer.

The clicks are Mcreary Casacar Slicks running at 20 lbs..... anything less and they spin spin spin...... I tried 13 lbs and almost went completly sideways at the 60 ft beams...
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  #19  
Old 01-19-2002, 03:12 PM
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We run 12. At 11 the car gets a lil harry on the big end and at 13 it does not want to squat right. 60's are way off.
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Old 01-19-2002, 06:39 PM
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Some people tell me that I should keep running a stiff sidewall slick beacue of my cars heavy weight... others say run wrinkle wall.

I can say that I have run both.. (the wrinkle walls were too tall) the stiff ones didn't more around so much on the top end.. I liked that better..

I think I'm gonna get a set of Hoosier quick times. They are a wrinle wall DOT but my buddy has had great luck with them. I think a set of 275-60 15 should be about the same size as my 26 8 15 slicks I have right now..
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  #21  
Old 01-19-2002, 09:05 PM
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That is what 71 Scamp runs and has run for the last 2 years. I know alot of people went to Hoosiers this year and did not like them at the track we go to. But again these were their slicks.
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