toyota 1gr 76mm throttlr body

[wparsons]

Have you ever actually looked at the diameter of ITB's compared to a single TB? Each TB is much smaller than a single TB.

Shorter runners make better top end power, but you can get that without ITB's. It's harder on a boxer engine though.

[fooddude]

Originally Posted by wparsons

Have you ever actually looked at the diameter of ITB's compared to a single TB? Each TB is much smaller than a single TB.

Reeeaallly??? ...and here I was, thinking ITB's used four 65mm TBs.. hahaha jk lol

Obviously they are smaller. Everyone knows this, you don't need to state every single obvious thing in the world. But, combined, the circumference and butterfly area would be very large and most likely larger than one 65mm TB.

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[mike the snake]

For ITB's could you have O2 sensors on each cylinder and control the fuel injection for each cylinder with a standalone ECU?

Also, one could simply convert to actual carbs like downdraft Webers, which are as sexy as ITB's with velocity stacks.

[michael336]

Originally Posted by fooddude

Obviously they are smaller. Everyone knows this, you don't need to state every single obvious thing in the world. But, combined, the circumference and butterfly area would be very large and most likely larger than 1 65mm TB.

I did the same thing on my other cars and it works good. Of course not only change a bigger tb only. Higher air pressure makes force to go to lower pressure area. It helps the engine breath easily. So that the rpm climbs faster. That's why I did the same way on both intake and exhaust. I have a vw gol which is sohc 2.0 and it can go faster than my 86 in 0-100. I will keep working on the 86 to show

[michael336]

I did try last night with my friend. He's a die hard trd fans. He buys every parts that the trd has to make his car the same as the trd demo car. I didn't really count but I go faster than his car almost a second in 0-100. And keep losing him until 5th gear ended

我從使用 Tapatalk 的 HTC Desire 700 dual sim 發送

[fooddude]

Originally Posted by mike the snake

For ITB's could you have O2 sensors on each cylinder and control the fuel injection for each cylinder with a standalone ECU?

Also, one could simply convert to actual carbs like downdraft Webers, which are as sexy as ITB's with velocity stacks.

Ya that does sound awesome; I was actually thinking the same thing after reading this thread - old school Weber carbs. In the 90s, I had an old friend/neighbor with an EF and B16 with Weber carbs..thing was an absolute monster. A little later on, in the late 90s, had a couple other friends doing the more modern ecu fuel controlled ITBs to their B series motors in various EFs and EGs with high comp pistons and cams. More monsters. All those cars were insanely fast.

[fooddude]

Wouldn't something like this work....

Get standard ITB's made for inline 4's (like a honda), like this..


...then mount it flat, directly top of the FA engine, in the middle, pointing the horns either forward or rearward, and then fabricate equal length runners (out of equal length piping and flanges) to connect and bolt onto the intake ports on the engine's head then to the flanges on the ITB manifold..shouldn't this work as well? ...granted, those custom equal length runners/piping will be super long (almost like a header) and might lose a bit of high end power...but it should work I think...and it wouldn't be too much different than this design, whom/which has the ITBs in the middle too and far away from the head's actual intake ports as well.. not to mention it would look a lot cleaner than this (similar to the orientation on honda ITBs - horizontal/flat and pointing backwards or even forwards)


...basically - making some sort of adapter (ie: made of long equal length piping) to use honda ITBs on a boxer FA.

[s2d4]

Originally Posted by s2d4

No one realised this is an ITB setup?
Some of the concerns raised were already sorted back in 1989.

Also, the guy that calls people immature was the first one using crude insulting name calling as the direct reply, wtf... Emotionally stability totally lost to ego on this one.

[fooddude]

Originally Posted by s2d4

No one realised this is an ITB setup?
Some of the concerns raised were already sorted back in 1989.

Also, the guy that calls people immature was the first one using crude insulting name calling as the direct reply, wtf... Emotionally stability totally lost to ego on this one.

What are you trying to say? ...no one realized it was ITB and we're all too dumb while you are the smartest person in the world? It's a skyline/rb26 engine with a needed plenum over the ITBs so it can be used in a turbocharged setup.. I asked if you've seen one easily working yet on a twin/fa engine that has better drivability than stock (something you said is) and not one of the thousands of past cars with ITBs...but you posted something totally irrelevant. In addition..1989 did not have electronically controlled TBs..so how can something be sorted when it wasn't even put into use yet in 1989?

Yes, I am emotionally unstable at times..thanks buddy. We are just humans after all. What about you? A perfect robot? Pointing fingers yet again? I'm just minding my own business, contributing/asking/learning on the thread, while you and some others want to criticize/mark other posts as dumb.

[s2d4]

Yes, you are right. I don't know why I posted that when people alluding to issues with conventional design.
Control systems isn't my discipline either so carry on.

[Boxer486]

Originally Posted by fooddude

....and, if you want me to be like you.... it's "offense" not "offence"

Lol, no it isn't. Stop embarrassing yourself with such fruitless labours.

[Boxer486]

Originally Posted by fooddude

It's a skyline/rb26 engine with a needed plenum over the ITBs so it can be used in a turbocharged setup..

No! You know, just because you make a guess at how something works, doesn't make it true. Something to think about in future.

[Crazy Drew]

Wow, there's so much misinformation and speculation in this thead it's amazing. I was going to post something informative about ITB's and fuel injection theory since a lot of this is being blown out of proportion but my words would just be wasted in the idiocracy that this forum has brought about. Thanks for the entertaining name calling and bashing. I'll go back to my garage and have a good laugh.

Might I suggest people do some reading on Helmholtz Resonance before assuming that short runners make power. Understand the mass flow pulses in a single TB rather than ITB's and the difference between drivability problems and a properly tuned car. It's not 1990, we're past Alpha-N, and we definitely don't need something as complicated as 4 actuators for ITB's.

[s2d4]

Originally Posted by fooddude

It's a skyline/rb26 engine with a needed plenum over the ITBs so it can be used in a turbocharged setup.. I asked if you've seen one easily working yet on a twin/fa engine that has better drivability than stock (something you said is) and not one of the thousands of past cars with ITBs...but you posted something totally irrelevant.

Non-turbo ITB 1988.