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| manifold again https://ausmini.com/forums/viewtopic.php?f=5&t=6868 |
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| Author: | Stuartminidlx [ Tue May 03, 2005 10:11 pm ] |
| Post subject: | manifold again |
whats the best method of removing material from a alloy manifold (redline 3005). i have been using 120 grit wet and dry but it is very slow. i have a die grinder but i'm not to sure it's the best way to go. i am removin material because of extremely lumpy inside. not polishing |
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| Author: | drmini in aust [ Tue May 03, 2005 10:42 pm ] |
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Get a carbide burr. Not a straight one, you want it curved so it doesn't dig in. A bit of RP7 or WD40 inside helps stop it clogging. I finish it off with 120 grit cloth strip in a slotted 1/4" rod. SLOW it down for this.. 
Those 3005 manifolds really need some metal out to perform well with a 45. You need volume in there. Mine took 9 hours altogether with a carbide burr at 24,000 rpm.. crap I took some metal out.. 
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| Author: | Stuartminidlx [ Tue May 03, 2005 10:59 pm ] |
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thanks. which type do u recomend from this site http://www.carbidebur.com/18shank/51series.htm i have a few stone type peices aswell are they any good |
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| Author: | drmini in aust [ Wed May 04, 2005 7:04 am ] |
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Can't see the pics, but I use an `oval' and a `tree with pointed end'. If your grinder has a 1/4" collet, get that size, they stand more abuse. |
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| Author: | Stuartminidlx [ Wed May 04, 2005 8:53 pm ] |
| Post subject: | |
did u match port it to the block also |
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| Author: | drmini in aust [ Wed May 04, 2005 9:41 pm ] |
| Post subject: | |
Stuartminidlx wrote: did u match port it to the block also
I match ported it to a `big port' gasket which matches the head ports. 37mm I think. 
You probably won't go that big, unless it's a race head.... If it's for a 45 carb, it needs a lot taken out of the top flange, most are only about 42mm diameter stock. |
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| Author: | Lillee [ Wed May 04, 2005 9:44 pm ] |
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I don't get cha... if it's 37mm on the gasket and the flange is 42mm in diameter stock... then why do you need to mod it?? 
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| Author: | drmini in aust [ Wed May 04, 2005 9:58 pm ] |
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68Delux wrote: I don't get cha... if it's 37mm on the gasket and the flange is 42mm in diameter stock... then why do you need to mod it??
If you don't mod it bigger than the carb (ie 45mm+) there's a step there as the mixture goes in. Into the head, where it's only about 33mm? dia normally, manifold dia is a little less anyway. Gas speed is higher there than at the carb mounting face. Anyhow, on these manifolds you don't want a step DOWN where it goes in. Step UP is OK.
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| Author: | Stuartminidlx [ Wed May 04, 2005 11:54 pm ] |
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well i have the top half of it out the 45mm now. haven't start at the other end yet because i haven't had time to pull the head off. but i have started to polish the outside of the manifold for extra bling. my mum is doin a good job of it to cause my arm hurts to much. hahaha |
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| Author: | drmini in aust [ Thu May 05, 2005 6:52 am ] |
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Stuartminidlx wrote: well i have the top half of it out the 45mm now. haven't start at the other end yet because i haven't had time to pull the head off. but i have started to polish the outside of the manifold for extra bling. my mum is doin a good job of it to cause my arm hurts to much. hahaha
I'd spend some time on enlarging and smoothing the bit in between, a good indication of how you're going is how much daylight you can see when you look thru it.. 
As I said before, you want some volume in there. |
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| Author: | Stuartminidlx [ Thu May 05, 2005 8:50 pm ] |
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will do. i was out so i missed the snap on truck so it will have to wait 2 week to i get a carbide burr so i can get serious. so i will stick to the stone grinder peices for now |
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| Author: | drmini in aust [ Thu May 05, 2005 8:59 pm ] |
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Stuartminidlx wrote: will do. i was out so i missed the snap on truck so it will have to wait 2 week to i get a carbide burr so i can get serious. so i will stick to the stone grinder peices for now
If using stones on alloy, put a bit of wax on them. Beeswax is good, even candlewax helps stop it digging in and loading up..
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| Author: | Stuartminidlx [ Thu May 05, 2005 9:13 pm ] |
| Post subject: | |
thanks for the tip i will see what i have around the house. do u have any pics of your manifold lookin down the from the carby side |
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| Author: | drmini in aust [ Thu May 05, 2005 9:22 pm ] |
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Sorry, no I don't, and it's on the car now. Here's a pic of my other manifold, (GR one) but the Redline 3005 can only dream of being this open inside.. 
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| Author: | gafmo [ Thu May 05, 2005 10:39 pm ] |
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Thats my Baby
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