intake manifold
#1
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intake manifold
I am getting ready to do the timing belt item and the valve lashing. well my question is. I have seen some where on here on one of the builds they used a sdk intake manifold. I have Googled it and I can only find it for the srt-4. do they not make it for our cars any more. and when I do the intake. I also want to ugrade the throttle body any suggestions on which one I should use
#6
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i'm thinking the larger throttle body would reduce the venturi effect going into the manifold, decreasing velocity and increasing static pressure inside the manifold...i can't see that making any noticeable power gains either, but probably has better throttle response, and maybe increasing power across the band, but not peak HP.
I could be wrong, I almost bought a throttle body from another member, but before i got paid, he sold it, but in retrospect maybe it was a good thing cause i haven't seen on paper that it is worth the money.
I could be wrong, I almost bought a throttle body from another member, but before i got paid, he sold it, but in retrospect maybe it was a good thing cause i haven't seen on paper that it is worth the money.
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#8
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Ive been thinking of dynoing the TB. Since its a thing of 10mins to change between stock and the 63mm TB. Just to have it on paper even though i know it wont have any impressive results but i want a base run to at least compare when doing 4-1 header and exhaust, so why not check the 2 TB's. That's the only way to check for true gains and not rely on the buttdyno.
For the 63mm TB i could say throttle response did increase slightly and that's about it. IIRC the stock IM intake is 63mm so anything higher is overkill unless port matched.
For the 63mm TB i could say throttle response did increase slightly and that's about it. IIRC the stock IM intake is 63mm so anything higher is overkill unless port matched.
#9
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venturi effect is when you decrease the cross-sectional area of a section of an "airway"...as the moving air enters the narrow section, its velocity increases, decreasing pressure...low pressure air is less dense.
i'll bet like $5 bucks the difference is minimal, and that if a larger throttle body makes any power gains it would be negligible compared to the cost of the throttle body.
Last edited by CrAnSwIcK; Nov 14, 2011 at 08:35 PM.
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What CrAnSwIcK is referring to probably is the nozzle/diffuser effect of the difference in TB diameters. I think the manifolds do have a stronger effect in the airflow that will go to the head than just the TB alone. I agree with him that the gains, if any will be minimal. People with the needed "breathing" mods just see a slight change on the hp along the graph but not any peak hp gains.
Maybe some people are only spending a few bucks just to get a fake "spooling" sound
#11
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Back on topic
Well I have the Gt Tb , p&p IM, and fully p&p competition head and I see the differences at mid to top end only... before 3.5 there's no noticeable difference.SDK isn't a vendor here which is why you won't find them here but from the heads I saw them do they only ported like 1-2inches deep at most. Which is fine for the IM but lacking for the head IMO.If your looking to p&p your IM do a few searches on how to / techniques then jump at it, it's pretty straight forward. Once you go forced induction the p&p work will show more then
Well I have the Gt Tb , p&p IM, and fully p&p competition head and I see the differences at mid to top end only... before 3.5 there's no noticeable difference.SDK isn't a vendor here which is why you won't find them here but from the heads I saw them do they only ported like 1-2inches deep at most. Which is fine for the IM but lacking for the head IMO.If your looking to p&p your IM do a few searches on how to / techniques then jump at it, it's pretty straight forward. Once you go forced induction the p&p work will show more then
#13
If I wanted to get my intake manifold ported, I would get it extrude honed.Otherwise, it's just a gasket match.
I hope that it's ok for my to post a link to their website. I don't work for them.
http://www.extrudehone.com/auto/auto-performance.php
I hope that it's ok for my to post a link to their website. I don't work for them.
http://www.extrudehone.com/auto/auto-performance.php
#14
I know its probably covered in the 1,000 TB threads but since this one is active and it kind of goes with the current conversation of PnP.....
I obviously mount points for the screws match with the larger TB to the Mani but does the outside of the larger body match up with the Manifold like a stoke TB would? or is this where port matching comes in? sorry if this doesn't make sense.
I obviously mount points for the screws match with the larger TB to the Mani but does the outside of the larger body match up with the Manifold like a stoke TB would? or is this where port matching comes in? sorry if this doesn't make sense.
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