Have an Idea for a FFIM

[mattsplat72]

I have been thinking lately about a FFIM . I have been helping my friend work on his RB26 and I have notice that the surge tank could be modified to work as a FFIM . I would need to plug a few holes and make a provision for a throttle plate and a ISC . I would most likely have to change the runner locations also. I think the air volume would be close to correct as it was designed for a 2.6 with twins . Any opinions? Oh yeah I can get one used for 150.00 also

 

[veedubin]

I have been thinking lately about a FFIM . I have been helping my friend work on his RB26 and I have notice that the surge tank could be modified to work as a FFIM . I would need to plug a few holes and make a provision for a throttle plate and a ISC . I would most likely have to change the runner locations also. I think the air volume would be close to correct as it was designed for a 2.6 with twins . Any opinions? Oh yeah I can get one used for 150.00 also

you mean surge tank as in part of the cooling system???? need pix!

 

[mattsplat72]

No, it is a intake mani with out the TB . RB's have ITBs

 

[spoolint78]

ya, their intake mani's look like a greddy one, very nice design.
They do have itb's.
My buddy has one, very nice setup.

I would think the q45tb would work better then the individual tb's imo.
But i think it can work with the 7m, its just that our intake mani is on the opposite side.

 

[figgie]

and not to mentiion that ITBs are a real pain in to setup properly.

 

[Bondango]

and not to mentiion that ITBs are a real pain in to setup properly.

The Plenum bolts to the ITBs on the rb26, what i think he means is to modify it so that it bolts/welds to say the lower 7m intake

http://www.topsecretjpn.com/products/rb26complete.jpg

 

[mattsplat72]

The Plenum bolts to the ITBs on the rb26, what i think he means is to modify it so that it bolts/welds to say the lower 7m intake

http://www.topsecretjpn.com/products/rb26complete.jpg

Bingo. So I have started and expect to have it done by Next week end .

 

[Burntz]

if you can do this pretty easily, count me in for buying one

 

[spooln30]

I would think the q45tb would work better then the individual tb's imo.
QUOTE]

Way off my friend.......ITB's have much better throttle response than one TB. I know a guy in Milw that used Busa 44 mm TB's on his 1G dsm and the throttle response was crazy.....like a champ car or F1......not joking!!

 

[figgie]

I would think the q45tb would work better then the individual tb's imo.
QUOTE]

Way off my friend.......ITB's have much better throttle response than one TB. I know a guy in Milw that used Busa 44 mm TB's on his 1G dsm and the throttle response was crazy.....like a champ car or F1......not joking!!

no actually you are way off.

ITB can be most beneficial in a N/A application where you tune (by length) the speed of the intake charge. IN a turbo setup all that goes out the door as now you are forcing the air through what ever lengths to get it into the cylinder.

 

[Mk3runner]

Bingo. So I have started and expect to have it done by Next week end .

if you can pull something like that off, I'll get behind Burntz and buy one.

 

[TurboStreetCar]

possible #3 purchase right here

 

[rot 90na-t]

no actually you are way off.

ITB can be most beneficial in a N/A application where you tune (by length) the speed of the intake charge. IN a turbo setup all that goes out the door as now you are forcing the air through what ever lengths to get it into the cylinder.

if this was the case, why do current champ cars (they are turbocharged) as well as old school turbo formula one cars use ITB setups? and many dragsters, can-am cars, touring cars, what have you, have used ITB setups, with and without a collecter like the RB motor.. if you have a collection chamber, the length of the runner doesnt matter as each throttle body pulls air from the same volumetric chamber.. In either case, the throttle response is dramatically increased

 

[spooln30]

If you look at production cars like Skyline R34 and Supra TT the Skyline is a more throttle responsive car due to the ITB"S