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Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Forced Induction

Forced Induction Turbo, Supercharger, Methanol, Nitrous


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SC 133 38.33%
TC 159 45.82%
NA 55 15.85%
Voters: 347. You may not vote on this poll

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Old 12-26-2009, 08:20 PM   #1
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Supercharger or Turbo ?

I will be getting a SC because I've never had the luxury of owning a FI vehicle and the whine of an SC makes me
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Old 12-26-2009, 08:38 PM   #2
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I prefer the near instant boost of a S/C. Turbos are for drag racers and bragging about power levels on the internet. On a road car, in terms of torque curves, flat > ski slopes.

Although, that said, I won't turn away from a turbo version if one is made available from the factory.
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Old 12-26-2009, 08:41 PM   #3
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Turbo plz.
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Old 12-26-2009, 10:22 PM   #4
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No one's buying a Yaris to wind the piss out of it and possibly slam into a mountainside pretending they're the ultimate Tofu delivery person.
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Old 12-26-2009, 10:26 PM   #5
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Old 12-26-2009, 11:09 PM   #6
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Quote:
Originally Posted by Jordo! View Post
I prefer the near instant boost of a S/C. Turbos are for drag racers and bragging about power levels on the internet. On a road car, in terms of torque curves, flat > ski slopes.

Although, that said, I won't turn away from a turbo version if one is made available from the factory.
+1 for supercharger, although two small fast spool turbos would be ok with me too I guess.
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Old 12-27-2009, 12:26 AM   #7
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It all depends on where the rpm is restricted to.

If the redline is <7k I will take a SC

If the redline goes up to 8k or 8.2k I will take a turbo. More effecient a higher RPM and more room for tunning (cheaply) v/s a Supercharger.

Turbo will work great on a high rpm vehicle. Supercharger looses its salt value in the top end.

If the red line is 8k....that's 5000 rpm to play with without getting a "butt kick" or unexpected rise in boost/hp and torque. Most turbo induction systems are in full boost around 2-3k factory (OEM).

If there is a 7k redline supercharger will be good for 5k as well. 1k rpm to 6k (starting to loose efficiency at this point)

Also all depends on the turbo etc..

If this is an aftermarket option I would say none of the above unless a TRD version comes out with a F/I option.

Last time TRD offered a supercharger for their "sport" coupe (Scion TC) it only added 40 crank hp...and was known to fail often without upgrading the pulley. It wasnt even the S/C that would whine (centrifugal vs. ROOTS)

All up to what the options are. If the car weighs under 2700 a good NA build will be more than sufficient unless you are drag racing. Otherwise I can see 50whp and 30wtrq and good increase in power/sound/feel as being sufficient.

If they are going to squeeze 200hp out of a 2L engine, it will cost money to get 300hp (ITB's, Cams, Long-tube's, Fuel: E85/93oct Premium) 250 crank will be the most realistic goals in terms of $ per H/P vs. Forced Induction. Not to mention, the compression ratio will not be favored for forced induction unless they change that with a forced induction version. Otherwise you will need pistons, forged internals, fuel system upgrade, fuel upgrade (premium or E-85) to handle higher temps and prevent Detonation.

So if toyota releases a TRD version with a forced induction option, it will all depend on the compression ratio and the redline.

And out of the 2, turbo is my favorite

bb88BBoo00OOss55SSttTT----FfFf3EE3vVVv4AA4

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Old 12-27-2009, 01:52 AM   #8
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I am probably going to stick with the N/A D-4S if a turbo model from the factory will not show, and as much as im a fan of turbo, i don't think adding F/I will be as simple with this motor compared to other engines like it.

Id bet money that Toyotas variant of the D4S is going to be pretty high reving, with high compression numbers. So a factory made N/A with +200hp and +200TQ is going to be enough for me.
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Old 12-27-2009, 02:44 AM   #9
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FI is a bit too feminine
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Old 12-27-2009, 03:20 AM   #10
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I would be surprised if the US gets the 2L and not a 2.5L engine. If we do get a high-revving 2L then SC, if we get a little more torquey 2.5L then TC.
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Old 12-27-2009, 05:06 AM   #11
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Quote:
Originally Posted by Jordo! View Post
I prefer the near instant boost of a S/C. Turbos are for drag racers and bragging about power levels on the internet. On a road car, in terms of torque curves, flat > ski slopes.

Although, that said, I won't turn away from a turbo version if one is made available from the factory.
The factory turbines in the first iteration of the 1JZ-GE had maximum boost at...er...damn, what was it? Really low...~2000 RPM.

Granted they were ceramic, and boost over 14psi would undoubtedly create a destruction you wouldn't want.
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Old 12-27-2009, 11:14 AM   #12
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Turbo all the way for me.
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Old 12-27-2009, 12:00 PM   #13
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Quote:
Originally Posted by WingsofWar View Post
I am probably going to stick with the N/A D-4S if a turbo model from the factory will not show, and as much as im a fan of turbo, i don't think adding F/I will be as simple with this motor compared to other engines like it.

Id bet money that Toyotas variant of the D4S is going to be pretty high reving, with high compression numbers. So a factory made N/A with +200hp and +200TQ is going to be enough for me.

Completely agree
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Old 12-27-2009, 06:31 PM   #14
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as my name goes 4agze a 4age w/ a supercharge all the way, but for the FT86 flat4 I may get a turbo.
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