Carb spacers on your 351
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2804
Printed Date: November-23-2024 at 7:06am
Topic: Carb spacers on your 351
Posted By: Fisherman
Subject: Carb spacers on your 351
Date Posted: December-17-2005 at 9:50am
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I am rebuilding my carb this winter and the rebuild kit comes with a spacer in it that I was unsure if I should use or not.
Currently there appears to be two spacers on my manifold. Both are about 1/2 inch thick and I was wondering if I actually need the two spacers or if I should just go to the new one in the kit? How many spacers are there undr your 4160 on the 351? Thanks in advance for your insights... and Happy Holidays. ------------- Central Oregon '79 Ski Nautique '84 & '85 MBZ Diesels '79 Apollo 3000DB It doesn't need to run bad or look bad just because it's old! |
Replies:
Posted By: AWhite70
Date Posted: December-19-2005 at 6:17am
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Originally my engine had one spacer under the carb. It was a die-cast aluminum casting about 1" thick and had the port for the PCV hose in it.
Now I have the original spacer and another that is about a 3/16" thick piece of steel that adapts my Edelbrock manifold to the Holley mounting setup. ------------- AWhite70 http://www.correctcraftfan.com/diaries/details.asp?ID=562&sort=revyear&pagenum=5&yrstart=1976&yrend=1980" rel="nofollow - '79 Ski Nautique |
Posted By: Bob's2001
Date Posted: December-19-2005 at 1:09pm
My carb has the one referred to above. Hot rodders will use carb spacers to boost power, maybe that's where the 2nd one came in. ------------- Bob Ed 83 2001 |
AWhite70 wrote:Posted By: Fisherman
Date Posted: December-19-2005 at 5:08pm
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Thanks Guys. ------------- Central Oregon '79 Ski Nautique '84 & '85 MBZ Diesels '79 Apollo 3000DB It doesn't need to run bad or look bad just because it's old! |
Posted By: Bradley950
Date Posted: December-21-2005 at 10:12am
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Fisherman;
I am currently using a 2inch carbon fiber spacer. The Spacer helps move the torque curve higher in the rpm range. This is why high rise intakes have a 1500-6500 peak power curve. Lower intakes will make power from off idle to 5500 rpm. The lower the intake and carb the faster you will make your best tourque. I chose the 2inch due to high rpm bare footing, it really helps. I hope this helps. Brad ------------- Brad Miller bradley950@yahoo.com |
Posted By: 83SN2001
Date Posted: December-21-2005 at 10:33am
| The spacer on your engine is probably a single spacer. Mine looks like 2 1/2 inch spacers but is actually one. There is a line that is probably from the casting mold that makes it look like 2. Why they use a spacer instead of a taller intake profile is a mystery to me. |
Posted By: Bradley950
Date Posted: December-21-2005 at 3:21pm
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I think they used it just for the PCV hose port. Just an idea. Brad ------------- Brad Miller bradley950@yahoo.com |
Posted By: Fisherman
Date Posted: January-14-2006 at 8:49am
Thanks again for the input. Now if it would just quit snowing I'd get into the rebuild.
 ------------- Central Oregon '79 Ski Nautique '84 & '85 MBZ Diesels '79 Apollo 3000DB It doesn't need to run bad or look bad just because it's old! |
Posted By: fish
Date Posted: January-26-2006 at 7:01pm
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They also use them if it is at a 45 degree slant to level the carb out as the engine bay as it sits at an angle in the boat. Woody at southeast correct craft told me that today. i would use the one on the boat. Does it have four seperate holes? Or one large opening. Four seperate like on my 75 351 is to direct fuel flow to ech intake port better. ------------- Thanks John k. |