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Old 09-10-2004, 11:39 AM   #1
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Waterboy : I Just installed BDR TB and here the Question

the manifold opening is way smaller the the TB mouth , wont I still have a bottleneck I did with the stock TB. will I still get the improved acceleration without port matching the manifold ?
and how much better will it be if I did port it ( not that I have the money or the time to do it right now


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Old 09-10-2004, 03:23 PM   #2
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well, i'm not waterboy, but perhaps i can help....

even on the stock manifold, your TB will give you improved throttle responce and acceleration. Of course, that will be increased if you are able to port your manifold, but you should still notice improvment on the stock manifold.

so i guess what i am trying to say is TB/intake upgrade on stock mani is good. TB/Intake upgrade on ported mani is better.

hope that makes sense.

BTW: what intake are you going to be using with your new TB?
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Old 09-10-2004, 03:38 PM   #3
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thanks for the reply crazy_urn , I already have a short ram intake that boxxed off so no engine heat get in. Whats involved in porting the mani , do U have to take the engine out or is it possible to remove the mani fairly easily ?
Even better can it be ported while still in the car and have some sort of a "catcher" so the bits of metal can fall in...or is that too far fetched.
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Old 09-10-2004, 04:26 PM   #4
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i think it would be alot better to remove the mani from the car... alot better then risking getting metal shavings in places you really dont want metal shavings.

let me see if i can find a little how-to or something for you.
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Old 09-10-2004, 04:28 PM   #5
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To be honest with you when I port matched (as closely as possible) the TB to the intake I just stuffed a few rags into the intake and went hog wild. Then when I was done I just used the shop-vac to get all the shavings out. Then for good measure I stuck the vac tube down into the intake until it bottomed out. 40k since I did it and no problems at all.

A word of caution though: Please be careful of the sides of the intake as they are thin. You can get a fair amount of porting done and it will help, but the port will be more like an oval than an "o". Go for it, you really can't mess it up. This was my very first porting attempt, and it went off just fine.

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Old 09-10-2004, 04:43 PM   #6
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well, i guess that answers that question...
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Old 09-10-2004, 07:55 PM   #7
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now for porting.... what gain would there be. noticeable enought to make a difference? i have a bdr tb and a mac short ram, paired with a magnaflow cat back and i am saving for a shorty header, poss a udp. also what would i need to do a porting job (tools).
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Old 09-10-2004, 10:46 PM   #8
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porting should be worth it, i believe.

as for what you need... i will defer to Waterboy... i have read a few theories, but have no first hand knowledge. dont want to lead you astray, young patawan...
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Old 09-10-2004, 11:19 PM   #9
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ha ha. you words are wise master, and so i shall wait. i get the concept. shave off some of the excess metal so air flow is not rrestricted. it is the shaving part that gets me. a dremel? who knows. i'll wait
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Old 09-11-2004, 01:36 AM   #10
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WOW! WOW!! I cant believe the difference the BDR TB made on this car , it was AWESOME !!
just a slight touch of the throttle and the babys revs were FLYING !! GREAT product hats off to BlackDiamond Racing, this is THE best upgrade so far ( air intake , mbpr exhuast , 16" wheels )

I think I will port the intake like Waterboy did cause I have a feeling Im not going to regret it.
Did U take any pics of the port job ? I probably trace around the gasket as a guide but and wary of area where the bolts are in the intake.
Any kind of a guide would be much appriciated
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