P2R Throttle Body Spacer FAQ's

[OrdnanceMarine]

Originally Posted by bizzybearfigiblue

OEM gaskets shouldn't be reused... that's one reason... the other would be the bolts that are sent with the spacer are tested with the whole setup i.e: TBG/TBS/TBG... and if u take out the two TBG u are now about 1/4" shorter which means the bolts might have to be cut to fit...

Roger that. I agree with not reusing the OEM gasket. Since the spacer is specifically designed to work with the insulated TBG (to the point that it may not install correctly without modifying the bolts/buying new ones due to length) wouldn't it make sense to sell the TBS with 2 TBGs as a kit? Seems like P2R could save some money in supply side management AND pass part of the savings along to their distributors and customers. I'm not complaining, just thinking about how that could be a win-win situation. I'm aware that some of our site sponsors have grouped the three items and applied a discount and this is probably the route I'll take.

Thanks for the insight!

[OrdnanceMarine]

Originally Posted by volksi

I love engineers!

My pocket protector, TI-85, short sleeve shirt, tie and slacks thank you! (Actually, it's casual Friday, Levi's and Hawaiian shirt for me!)

[ErichPryde]

Originally Posted by OhondaU

Any power increases are most likely seen from the stabilizing effect of the "tunnel" created by the spacer. It would let the airflow return to less turbulent state before entering the plenum. This would improve the plenum filling speed and hence it's efficiency.

Not trying to be argumentative, just correct the whole "bigger volume" theory. The extra volume is at best a side effect. You could slightly decrease the main body of the plenum to counter-act the volume increase from the spacer and you would still see a gain.

I pretty much agree with this. well put.

there is an increase in throttle response, however minute it may be. your jumping analogy was a good one, too. too bad I can't rep you.... not that it matters. consider this a +1.

[OhondaU]

Originally Posted by bizzybearfigiblue

that was a good analogy... i figured out what u were saying after i posted and reread what u posted...

that's exactly what i came up with... glad we're on the same page...


ok so basically it's like the b/c stock the takes a dip then shoots up making it feel like u have a very strong curve... unlike the reflash that smooths this out so u don't feel it b/c it doesn't have the dip b4 , right??

bizzybear,

thats it pretty much.

[tolgaSI]

gotta quick question..
if we take out the plug that screws onto the 'nitrous plug', will it do anything..any changes at all in anything? tnx

[OrdnanceMarine]

Originally Posted by tolgaSI

gotta quick question..
if we take out the plug that screws onto the 'nitrous plug', will it do anything..any changes at all in anything? tnx

Do you mean to take it out and not seal up the hole with something? That would be called "vacuum leak"! Very bad!!! If you choose not to use the nylon plug you will have to seal the hole with something. Be sure you're sealing it with something that can't possibly come off and get ingested by your engine.

[bizzybearfigiblue]

Originally Posted by tolgaSI

gotta quick question..
if we take out the plug that screws onto the 'nitrous plug', will it do anything..any changes at all in anything? tnx

Originally Posted by OrdnanceMarine

Do you mean to take it out and not seal up the hole with something? That would be called "vacuum leak"! Very bad!!! If you choose not to use the nylon plug you will have to seal the hole with something. Be sure you're sealing it with something that can't possibly come off and get ingested by your engine.

u will have a ridiculously crazy idle... and it prolly won't let u rev to the limit...

[tolgaSI]

lol someone long time ago said it would be 'good' if you took it out.
i guess not! thanks guys.

[bizzybearfigiblue]

Originally Posted by tolgaSI

lol someone long time ago said it would be 'good' if you took it out.
i guess not! thanks guys.

if it was in front of the throttle body it might not give u many problems... but being that it's after the TB it will act as a leak... much like if ur intake manifold wasn't bolted on properly or had a busted seal around the injector...

[NcA]

This is a great write up. I'm now considering picking up a TBS as one of my next set of mods. Just a question... What would the effects of adding an aftermarket TB (such as the Skunk2 pro series) alongside a TBS be? Would it help recoup lost throttle resonse? Would a larger diameter be better?

[bizzybearfigiblue]

Originally Posted by NcA

This is a great write up. I'm now considering picking up a TBS as one of my next set of mods. Just a question... What would the effects of adding an aftermarket TB (such as the Skunk2 pro series) alongside a TBS be? Would it help recoup lost throttle resonse? Would a larger diameter be better?

well i'm not an expert... but if u get a TB with a larger diameter... it would prolly be best to send the TBS to a machine shop to match the diameter of the TB...

as of right now there's not enough market to make a TBS with a bigger diameter... which is why it's not made in different sizes...

[ErichPryde]

I agree with bear- with the addition of a larger throttle body you should consider also porting a thottle body spacer. you should also consider porting the entrance of your Intake manifold...

[OrdnanceMarine]

Speaking of matching internal diameters here's one to ponder. I noticed that the ID of the TBG's are something in the neighborhood of 3-4mm less than the spacer (this is from memory when I installed mine about a week ago, I should have put a caliper on it but didn't). While I'm sure it's not disturbing the flow much, wouldn't it make sense to shave off this excess to smooth out the transition? I didn't have time to do it when I did my install but I'm considering it when I take things apart to install my IMG.

Another note: Before I noticed that the TBG's are smaller than the TBS I tightened the nylon plug as far as I felt it would go before rounding off and noticed the plug doesn't end up flush with the inside of the spacer so I squirted some RTV in the hole and tooled it flush. I figured it can only help keep the flow a little bit smoother. Again, probably won't make any real sort of difference but I'm always looking to optimize where possible.

[lkdreamcast_si]

A every low cost for a very low hp/tq gain. Plus its its easy DIY. Looks like I have to visit corsportinc.

[firstsi]

Originally Posted by OrdnanceMarine

Speaking of matching internal diameters here's one to ponder. I noticed that the ID of the TBG's are something in the neighborhood of 3-4mm less than the spacer (this is from memory when I installed mine about a week ago, I should have put a caliper on it but didn't). While I'm sure it's not disturbing the flow much, wouldn't it make sense to shave off this excess to smooth out the transition? I didn't have time to do it when I did my install but I'm considering it when I take things apart to install my IMG.

Another note: Before I noticed that the TBG's are smaller than the TBS I tightened the nylon plug as far as I felt it would go before rounding off and noticed the plug doesn't end up flush with the inside of the spacer so I squirted some RTV in the hole and tooled it flush. I figured it can only help keep the flow a little bit smoother. Again, probably won't make any real sort of difference but I'm always looking to optimize where possible.

hopefully that sealant wont pull free and get sucked into the intake

[OrdnanceMarine]

Originally Posted by firstsi

hopefully that sealant wont pull free and get sucked into the intake

Definitely something to be concerned about but I've worked with RTV for over a decade and paid close attention when I filled to void to ensure that there were no air bubbles behind it (to expand and contract as MAP varies from ~2-15 psi). I'm pretty confident in it's holding characteristics but will check on it when I have it apart to install my IMG.

[SiliconX]

Originally Posted by BTRobertson

Awesome write-up broham. :) I was pondering this mod purchase for a while and had added it/deleted some six times at CorSport because I couldn't find any real pertinent info. Excellent job. I've got the Fujita F5 SRI and I'm sure it'll fit just fine. I already bought one TBG from CorSport so I'm sure they'll throw in a second with the purchase for a discount - those guys are fantastic over there.

To answer your concern (yes, i'm aware it's a month old), the Fujita SRI does fit with the TBS+Dual P2R gaskets, but it doesn't "rest" as well as it does without. What I did was cut about 3/4-1" off the rubber elbow where it meets the TB. Still not a perfect fit, but pretty damn close.

With the amount of vibration the intake sees, i'd really be worried about it without the modification. As you can see, it fits fine:

[tac 1]

Oh yeah, I made a seperate thread for this problem.

HELP! rev hang after installing P2r TBS

[ErichPryde]

^seems to be unique to one vehicle.

[VTECnical]

OrdnanceMarine - Roger that. I agree with not reusing the OEM gasket. Since the spacer is specifically designed to work with the insulated TBG (to the point that it may not install correctly without modifying the bolts/buying new ones due to length) wouldn't it make sense to sell the TBS with 2 TBGs as a kit? Seems like P2R could save some money in supply side management AND pass part of the savings along to their distributors and customers.

Spot on! I agree.