My J's Racing Intake Installation...
- Thread starter jugbugz
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VTI_EG_DAN
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where can I get the rubber gasket stuff from mate? I have searchrubber gasket on ebay but doesnt come up with it!
Cheers
Cheers
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get yourself down a scrappie and take the boot seal off of a car, should do the trick
VTI_EG_DAN
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want it for the interior at back mate, where its been cut so you can get in to adjust the coilovers, just ot make it look neater
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After some time and thinking with this intake I was thinking about changing it to an AEM V2 and couple that with BPi velocity stack.
BPi - Performance Velocity Stack
But after some research and comparisons, I asked Bryan at BPi about a 4" velocity stack that would couple the J's intake... apparently this 4" velocity stack has only recently be 'in-demand' as it would also target turbo cars. a 3.5" is already out but thats still too small for the J's...... Both 3" and 3.5" stacks have a 6" filter flange...meaning the filter is huge!!
I stumbled across this site which does make a 4" velocity stack.
Turbohoses AirRam & Velocity Stacks, Velocity Stack, Air Ram, Intake, Airram Intake, Turbohoses Intake
It is made for an M3 and motor racing cars. This stack comes with 4" intake flange and a 6" filter flange... also much more expensive than BPi stacks. But when Bryan was talking about developing the 4" stack, he noted he was asking and searching for filter companies that would develop a 7" or 8" flanged filter which would be rediculously HUGE! With BPi's knowledge, its seems that they will only release a 4" stack if there was a 7" or 8" flanged filter available... meaning a 4" intake flange + 6" flow stack won't work as efficient as a 3" intake flange + 6" flow stack. A 8" flow stack is more suited to the 4".
With all this talk about air charge velocity etc etc etc... I questioned about J's design... and how smaller diameter piping would have higher velocity charge. Air behaves like water so it is also affected by bends. So it is best to have the straightess and minimum bends as possible with a good intake pipe.
Looking at a few intakes on the market, I quite liked the AEM V2 which also has the same sized 4" flanged tip as the J's... However, this intake didn't seemed to fair very well compared to some... While questioning the J's, I had a quick look at its design and if it has any air charge effect. I was surprised with the discovery that it does!...It seems the highest air velocity point on the J's intake is right at the tip of the TB where its 60mm... looking at the design and air flow, air inside the plenum gets forced through like the 'venturi effect'.
Straight through single diameter pipes will have constant pressure throughout because the diameter is same throughout the pipe BUT it slows down at every bend greater than 8-10 degrees. Single Diameter pipes might also have volume restriction (unlike J's) depending on your setup...
With the J's intake design, the large part of the plenum would be considered the low pressure point. And as the plenum shrinks towards the TB, maximum air velocity would be achieved at that point, same theory as with 'SPOON venturi TB'. It seems the bends on the Js intake is minimal and only happens in the low pressure area, which would not affect flow as much as it would in a high pressure zone. Luckily, 3/4 way towards the TB, the plenum starts to shape like a funnel which then ends at a 60-65mm diameter, high pressure point!...
Depending if the 4" stack and 7" or 8" filter comes out, at that time I'll either consider changing my entire intake for an AEM V2 intake + BPi 4" stack OR keep my J's + BPi 4" stack. If the 7" or 8" filter won't come out, then I'll might consider buying 'turbohoses 4" velocity stack and add it onto my J's... But swapping my entire intake for the V2 may not be worth the money especially if it wont gain anything from J's setup...
Either way, I'll be using the 6" AEM DRYFLOW filter...
Comments and opinions welcome!
BPi - Performance Velocity Stack
But after some research and comparisons, I asked Bryan at BPi about a 4" velocity stack that would couple the J's intake... apparently this 4" velocity stack has only recently be 'in-demand' as it would also target turbo cars. a 3.5" is already out but thats still too small for the J's...... Both 3" and 3.5" stacks have a 6" filter flange...meaning the filter is huge!!
I stumbled across this site which does make a 4" velocity stack.
Turbohoses AirRam & Velocity Stacks, Velocity Stack, Air Ram, Intake, Airram Intake, Turbohoses Intake
It is made for an M3 and motor racing cars. This stack comes with 4" intake flange and a 6" filter flange... also much more expensive than BPi stacks. But when Bryan was talking about developing the 4" stack, he noted he was asking and searching for filter companies that would develop a 7" or 8" flanged filter which would be rediculously HUGE! With BPi's knowledge, its seems that they will only release a 4" stack if there was a 7" or 8" flanged filter available... meaning a 4" intake flange + 6" flow stack won't work as efficient as a 3" intake flange + 6" flow stack. A 8" flow stack is more suited to the 4".
With all this talk about air charge velocity etc etc etc... I questioned about J's design... and how smaller diameter piping would have higher velocity charge. Air behaves like water so it is also affected by bends. So it is best to have the straightess and minimum bends as possible with a good intake pipe.
Looking at a few intakes on the market, I quite liked the AEM V2 which also has the same sized 4" flanged tip as the J's... However, this intake didn't seemed to fair very well compared to some... While questioning the J's, I had a quick look at its design and if it has any air charge effect. I was surprised with the discovery that it does!...It seems the highest air velocity point on the J's intake is right at the tip of the TB where its 60mm... looking at the design and air flow, air inside the plenum gets forced through like the 'venturi effect'.
Straight through single diameter pipes will have constant pressure throughout because the diameter is same throughout the pipe BUT it slows down at every bend greater than 8-10 degrees. Single Diameter pipes might also have volume restriction (unlike J's) depending on your setup...
With the J's intake design, the large part of the plenum would be considered the low pressure point. And as the plenum shrinks towards the TB, maximum air velocity would be achieved at that point, same theory as with 'SPOON venturi TB'. It seems the bends on the Js intake is minimal and only happens in the low pressure area, which would not affect flow as much as it would in a high pressure zone. Luckily, 3/4 way towards the TB, the plenum starts to shape like a funnel which then ends at a 60-65mm diameter, high pressure point!...
Depending if the 4" stack and 7" or 8" filter comes out, at that time I'll either consider changing my entire intake for an AEM V2 intake + BPi 4" stack OR keep my J's + BPi 4" stack. If the 7" or 8" filter won't come out, then I'll might consider buying 'turbohoses 4" velocity stack and add it onto my J's... But swapping my entire intake for the V2 may not be worth the money especially if it wont gain anything from J's setup...
Either way, I'll be using the 6" AEM DRYFLOW filter...
Comments and opinions welcome!
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i've always wondered what the inside of the pipe on the aem v2 is like where it downsizes, if its not a smooth tapered join then its going to cause a distorted air flow i would of thought?it also has some quite sharp bends in the pipe which as you say will slow the flow.
dont think the aem would rival the j's, i wouldn't swap mine for one
dont think the aem would rival the j's, i wouldn't swap mine for one
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Yeh, I ended up ordering a Comptech ICE BOX for complete donor parts.
I've also just modified my DC2R stock intake with a 3" pipe wtih 4" flare velocity stack no filter.. I used extra large ITB sock filters to place at the end of the air feed pipe under the fender. I had to use the old stock air filter's frame as a donor part to bolt the velocity stack onto. This made the stack fit like a stock filter inside the box.
Theres also a baffle box in between the air feed pipe to the box. I took it and modified a direct connection with the pipes, this way, the box doesnt exist in the system anymore. What I got from this mod was a 50% increase intake growl.
i can't express how much difference this made to my bone stock 01 DC2R. Vtec kicks much harder from this tiny mod... The intake growl has increased 100% over stock with the stack and baffle mod. Another suprising thing was the increase of throttle response which you would normally get with exhuast upgrade.
The Comptech box will have the same setup for my 9. But the COMPTECH ICE BOX can support a 3" pipe with 6" flare velocity stack. Which means, its better and the box will have more volume.
NEW THREAD SOON...
I've also just modified my DC2R stock intake with a 3" pipe wtih 4" flare velocity stack no filter.. I used extra large ITB sock filters to place at the end of the air feed pipe under the fender. I had to use the old stock air filter's frame as a donor part to bolt the velocity stack onto. This made the stack fit like a stock filter inside the box.
Theres also a baffle box in between the air feed pipe to the box. I took it and modified a direct connection with the pipes, this way, the box doesnt exist in the system anymore. What I got from this mod was a 50% increase intake growl.
i can't express how much difference this made to my bone stock 01 DC2R. Vtec kicks much harder from this tiny mod...
The intake growl has increased 100% over stock with the stack and baffle mod. Another suprising thing was the increase of throttle response which you would normally get with exhuast upgrade.The Comptech box will have the same setup for my 9. But the COMPTECH ICE BOX can support a 3" pipe with 6" flare velocity stack. Which means, its better and the box will have more volume.
NEW THREAD SOON...
Last edited:
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i've always wondered what the inside of the pipe on the aem v2 is like where it downsizes, if its not a smooth tapered join then its going to cause a distorted air flow i would of thought?it also has some quite sharp bends in the pipe which as you say will slow the flow.
dont think the aem would rival the j's, i wouldn't swap mine for one
Geez, I've found a 4" pipe with 6" velocity stack locally... but when I saw how big the filter was... my jaw dropped! Over 100% bigger than the J's filter!
Although I've researched that a 6" mushroom filter is available and will fit nicely. This should improve the J's intake for sure. But too bad someone has already offered $$ for mine...
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just use a filter cleaning kit... or get the filter serviced by a local mech. It needs to be re-oiled.
pateras_vtec
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since this thread goes on for so long i decided to post here, instead of starting a new thread about: i want to order the J`s carbon intake BUT i don`t know which one should i get (let me remind you that i have a B18C into an EJ9) and i don`t know if i need the non abs or the abs one? My car doesn`t have abs but i don`t know about the integra`s engine bay. except the ek9 and dc2 throttle bodies are the same, which i think they`re not.
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Yep just get an ek9 one!
pateras_vtec
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I was under the impression that the b16b throttle is 2-3 mm smaller than the b18c one.