ITB, how much more power? - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

1660 · 08-19-2011, 11:35 AM

Quote:

Originally Posted by Tyandriel

16:1 lean?

Yes. 14.7:1 is ideal at idle for FI. Under load or WOT 12.5 to 12.9 is ideal for FI.

Tyandriel · 08-21-2011, 05:01 AM

thanks!

fatoni · 08-21-2011, 11:07 AM

Quote:

Originally Posted by 1660

If Yamaha takes the ITB approach like the LF-A, there won't be much left on the table. That would be a costly approach for a Scion and would probably gain more than 200 HP. On the other hand, if Yamaha takes the 2ZZ-GE approach, I think the easiest way to get more power is to increase air and fuel, larger TB and re-mapping the AFR. Yamaha will tune the intake and exhaust, so porting and polishing would help.

The crank would be forged and the connecting rods would be high strength steel, so you could probably raise the RPM limiter or fuel cut off.

itrbs probably gain more than 200hp?

1660 · 08-21-2011, 11:25 AM

Quote:

Originally Posted by fatoni

itrbs probably gain more than 200hp?

Yamaha is capable of getting 133.6 hp from a NA 600 cc motorcycle engine.

Merlin · 08-21-2011, 01:08 PM

Quote:

Originally Posted by 1660

Yamaha is capable of getting 133.6 hp from a NA 600 cc motorcycle engine.

At the cost of peak power of 14k-15k rpm, with no mid range power...

1660 · 08-22-2011, 01:06 AM

Quote:

Originally Posted by Merlin

At the cost of peak power of 14k-15k rpm, with no mid range power...

You missed the point. Yamaha could easily get more than 200 hp from 2 liters.

Type[R]+ · 08-22-2011, 01:49 AM

Quote:

Originally Posted by 1660

You missed the point. Yamaha could easily get more than 200 hp from 2 liters.

That is stupid. Strap on a turbo and it's easy to get over 1000hp....

Levi · 08-22-2011, 04:47 AM

But turbo doesn't sound good, has lag and is not responsive. Also, if the FT-86 is light it does not need 400 Nm. Too much "kick-in-the-ass" torque would make the rear wills spin even in third gear and the car will be controlable but unstable when grip is needed.

Type[R]+ · 08-22-2011, 05:45 AM

Quote:

Originally Posted by Levi

But turbo doesn't sound good, has lag and is not responsive.

Says who? BMW and VAG certainly disagrees with you....

Never heard a T51R supra before? Youtube that for some turbo bliss!

Quote:

Originally Posted by Levi

Also, if the FT-86 is light it does not need 400 Nm. Too much "kick-in-the-ass" torque would make the rear wills spin even in third gear and the car will be controlable but unstable when grip is needed.

There's a million factors to consider, I don't know where to start!

Although not turbo, drive an Lotus Elise and an Elise supercharged back to back and then tell me which is better. And these cars are way lighter than the FT86 will ever be!

CyberFormula · 08-22-2011, 09:40 PM

I think all we need is a VERY tiny turbo.

That way people that want larger turbo can go bigger easier.

And those that don't want kicking torque will not be mad about it.

What I REALLY would smile about is if it was a twin tiny turbos

fatoni · 08-22-2011, 11:08 PM

Quote:

Originally Posted by 1660

You missed the point. Yamaha could easily get more than 200 hp from 2 liters.

oh it sounded like you were saying itbs would gain this car 200hp. you dont need itbs for 200hp.

ZC6BRZ · 12-25-2012, 03:31 AM

Quote:

Originally Posted by 1660

Most I've seen run without filter. A friend has a 74 Celica without filter.

Sure they're not Carbs? Or what motor swap? I have a 74 celica too!

Calum · 12-25-2012, 05:12 AM

A thread from 1 year, 4 months and 2 days ago. You get 15 interweb points for knowing how to use the search function... But what the heck were you looking for?

ZC6BRZ · 12-25-2012, 12:20 PM

Umm... maybe ITBs?

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08-21-2011, 05:01 AM	#58
Tyandriel Member Join Date: Aug 2011 Drives: Supra MkIII Location: Germany Posts: 63 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	thanks!

08-22-2011, 04:47 AM	#64
Levi Senior Member Join Date: May 2011 Drives: Toyota Location: Germany Posts: 1,202 Thanks: 134 Thanked 138 Times in 90 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	But turbo doesn't sound good, has lag and is not responsive. Also, if the FT-86 is light it does not need 400 Nm. Too much "kick-in-the-ass" torque would make the rear wills spin even in third gear and the car will be controlable but unstable when grip is needed.

08-22-2011, 09:40 PM	#66
CyberFormula Senior Member Join Date: Dec 2009 Drives: gti, nsx, integra type r,porsche911 Location: garage Posts: 536 Thanks: 1 Thanked 17 Times in 15 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I think all we need is a VERY tiny turbo. That way people that want larger turbo can go bigger easier. And those that don't want kicking torque will not be mad about it. What I REALLY would smile about is if it was a twin tiny turbos

12-25-2012, 05:12 AM	#69
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,867 Times in 1,499 Posts Mentioned: 82 Post(s) Tagged: 1 Thread(s)	A thread from 1 year, 4 months and 2 days ago. You get 15 interweb points for knowing how to use the search function... But what the heck were you looking for?

12-25-2012, 12:20 PM	#70
ZC6BRZ Wannabe JDM Type S Join Date: Jul 2012 Drives: 2013 BRZ Limited Location: San Francisco Posts: 476 Thanks: 90 Thanked 207 Times in 118 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Umm... maybe ITBs?

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