Rear mount 530whp Turbo IS-F anyone?

[OnURleft]

Aesthetically beautiful, functionally questionable....









Questionable, but still badass

[DeeAOne]

i never understood how you can make "good" power off of a rear mount turbo. someone enlighten me please.

[mark ryan7]

man those is-f's are pure sex!

[pr8yr]

WO! damn!! I like it. Forget questioning yo. I would hop on this thing any day.

[1SICKLEX]

Aesthetically beautiful, functionally questionable....

DAAAAAAAAAAAAAMN!!!!!!!!!!!

[OnURleft]

WO! damn!! I like it. Forget questioning yo. I would hop on this thing any day.

Yeah it looks amazing, and 8 gears + luxury and 530 rear mounting rwhp sounds interesting

[1SICKLEX]

Artisan Performance TT'd IS-F from www.speedlounge.com's HIN San Mateo coverage.

Guy lives in Cali. supposedly puts down 600hp +

[Drummerboy]

I personally dont like the rear mounts. Simply because of loss of efficiency due to heat transfer from exhaust pipe to IC pipe, since they run side by side more times than not. case and point, the firebird STS kits.

Does anyone think Rear mount>front mount? if so why?

[The Green Monster]

sexy!!!

[2turbo4u]

I rock it everyday yo!

[DirtyMechanic]

I personally dont like the rear mounts. Simply because of loss of efficiency due to heat transfer from exhaust pipe to IC pipe, since they run side by side more times than not. case and point, the firebird STS kits.

Does anyone think Rear mount>front mount? if so why?

rear mount is more efficient by the way. less heat is made due to the turbo is cooler and the piping going back the front is the intercooler. so a front mount is usually not needed. the farther you get away from the motor the more efficient it is. but less response aka more lag. turbo seal last longer due to the turbo all around is cooler. no real need for a turbo timer.

but i still never and will probably never like remote mount turbos due to the oil supply and drain system. mainly the drain system. i always see the electric oil pump not work for a few minutes for some reason and let the oil back up and blow the oil seals out. and for that reason i will probably never like remote mount.

[Drummerboy]

rear mount is more efficient by the way. less heat is made due to the turbo is cooler and the piping going back the front is the intercooler. so a front mount is usually not needed. the farther you get away from the motor the more efficient it is. but less response aka more lag. turbo seal last longer due to the turbo all around is cooler. no real need for a turbo timer.

but i still never and will probably never like remote mount turbos due to the oil supply and drain system. mainly the drain system. i always see the electric oil pump not work for a few minutes for some reason and let the oil back up and blow the oil seals out. and for that reason i will probably never like remote mount.

I understand its Intercooler piping, but If you have exhaust piping running within inches of the intercooler pipe, you're going to have massive heat transfer across the length of the pipe.
Basically, its diffusion of heat until both pipes are equal temp.
So wouldn't a normal front setup with maybe a cold air intake from the turbo be more efficient than a (remote?) mount?

I'm just trying to understand, not debate, please dont take it that way.

[DirtyMechanic]

I understand its Intercooler piping, but If you have exhaust piping running within inches of the intercooler pipe, you're going to have massive heat transfer across the length of the pipe.
Basically, its diffusion of heat until both pipes are equal temp.
So wouldn't a normal front setup with maybe a cold air intake from the turbo be more efficient than a (remote?) mount?

I'm just trying to understand, not debate, please dont take it that way.

no wrong way taken. the pipes would never be equal temps. there would have to be crazy amounts of heat in order to even warm up the charge pipe. i would be more worried about other things under the car, maybe inside the car melting and burning. dont forget about the turbulence from the air under the car. but usually the exhaust and charge pipe are run on opposite sides of the driveshaft tunnel. aluminum dissipates heat very well. so the transfer of heat even an inch away is minimal. but now if they were touching that would a different story. but even then the charge pipe being aluminum will probably not even notice the small spots of heat. i bet the intake air temps are maybe a few degrees above ambient a max of probably 10 at higher boost pressures.

[GSRteg®]

Looks cool that's about it

[DriVaH]

most ppl i know are 2 low for something like that ... looks good though

[HypnoToad]

i like it minus the blue lexus logo,kinda cheap looking.

[Capt._Ron]

no wrong way taken. the pipes would never be equal temps. there would have to be crazy amounts of heat in order to even warm up the charge pipe. i would be more worried about other things under the car, maybe inside the car melting and burning. dont forget about the turbulence from the air under the car. but usually the exhaust and charge pipe are run on opposite sides of the driveshaft tunnel. aluminum dissipates heat very well. so the transfer of heat even an inch away is minimal. but now if they were touching that would a different story. but even then the charge pipe being aluminum will probably not even notice the small spots of heat. i bet the intake air temps are maybe a few degrees above ambient a max of probably 10 at higher boost pressures.

Heat transfer at an inch away from the exhaust definately wont be minimal. I have seen a turbo'ed miata's exhaust transfer so much heat to the trunk that it melted plastic cups stored there. Im not saying that the intake temps would differ any more than your hypothesized 10 degrees, just sayin the amount of heat transfer definately is not minimal at a distance of 1"

[On_Her_Face]

I love the car! Now on to the debate. I think rear mount is better as dirtymec has stated for heat reasons. The turbo is definitely cooler no questions. The piping is cooler than it would be in the engine bay. I have never seen where the I/C pipe and exhaust are close enough for it to matter (please post pics). Also this has not been mentioned but the weight factor. You do not have extra weight up in the front of the car. As for more lag, who cares if you have enough TQ!

[mirz833]

thats so sick

[Drummerboy]

no wrong way taken. the pipes would never be equal temps. there would have to be crazy amounts of heat in order to even warm up the charge pipe. i would be more worried about other things under the car, maybe inside the car melting and burning. dont forget about the turbulence from the air under the car. but usually the exhaust and charge pipe are run on opposite sides of the driveshaft tunnel. aluminum dissipates heat very well. so the transfer of heat even an inch away is minimal. but now if they were touching that would a different story. but even then the charge pipe being aluminum will probably not even notice the small spots of heat. i bet the intake air temps are maybe a few degrees above ambient a max of probably 10 at higher boost pressures.

This sounds like it could be right. So for now i'll take your word for it, I've never personally dealt with a remote mount, so I'm not 100% sure.

It's refreshing to hear a car guy that is actually intelligent enough to understand things like heat transfer, friction, inertia, turbulence, and basic physics.

+reps to you, my dirty friend.

[bcmurphy87]

i just goota say sploooog

[Sport1.3]

Heat transfer at an inch away from the exhaust definately wont be minimal. I have seen a turbo'ed miata's exhaust transfer so much heat to the trunk that it melted plastic cups stored there. Im not saying that the intake temps would differ any more than your hypothesized 10 degrees, just sayin the amount of heat transfer definately is not minimal at a distance of 1"

but like he said, there is no air passing through the trunk, so it would only retain that heat build up... unlike the aluminum piping underneath the car.

[speedminded]

Heat transfer at an inch away from the exhaust definately wont be minimal. I have seen a turbo'ed miata's exhaust transfer so much heat to the trunk that it melted plastic cups stored there. Im not saying that the intake temps would differ any more than your hypothesized 10 degrees, just sayin the amount of heat transfer definately is not minimal at a distance of 1"

1) Heat rises so of course it's going to heat up the trunk. Foil heat insulation adhered on the body above the exhaust would prevent that 100%. The trunk will contain the heat as well just as sport1.3 said.

2) Heat will get trapped in front of the rear bumper if it's not vented or routed properly to exit.

3) It's called heat shielding. A simple aluminum shielding will block most or even use heat wrap to prevent heat transfer between pipes.

4) The reliability of the oil lines is 100% if it's done correctly. How often are brake lines damaged during daily or track driving?

5) Nobody says you can't run a front mount intercooler with a remote turbo, it's just not needed for lower boost or what most stock engines hold.

6) If the piping and turbo is sized appropriately then the lag is no more than any other turbo setup.

[DirtyMechanic]

1) Heat rises so of course it's going to heat up the trunk. Foil heat insulation adhered on the body above the exhaust would prevent that 100%. The trunk will contain the heat as well just as sport1.3 said.

2) Heat will get trapped in front of the rear bumper if it's not vented or routed properly to exit.

3) It's called heat shielding. A simple aluminum shielding will block most or even use heat wrap to prevent heat transfer between pipes.

4) The reliability of the oil lines is 100% if it's done correctly. How often are brake lines damaged during daily or track driving?

5) Nobody says you can't run a front mount intercooler with a remote turbo, it's just not needed for lower boost or what most stock engines hold.

6) If the piping and turbo is sized appropriately then the lag is no more than any other turbo setup.

pstt 3rd pic doesnt work. and is the 2nd pic CTS? and what the hell is the 1st pic of. 4th is duh a vette.

[speedminded]

pstt 3rd pic doesnt work. and is the 2nd pic CTS? and what the hell is the 1st pic of. 4th is duh a vette.

1st is an e60 BMW (2003+ 5-series)

[Capt._Ron]

1) Heat rises so of course it's going to heat up the trunk. Foil heat insulation adhered on the body above the exhaust would prevent that 100%. The trunk will contain the heat as well just as sport1.3 said.

2) Heat will get trapped in front of the rear bumper if it's not vented or routed properly to exit.

3) It's called heat shielding. A simple aluminum shielding will block most or even use heat wrap to prevent heat transfer between pipes.

4) The reliability of the oil lines is 100% if it's done correctly. How often are brake lines damaged during daily or track driving?

5) Nobody says you can't run a front mount intercooler with a remote turbo, it's just not needed for lower boost or what most stock engines hold.

6) If the piping and turbo is sized appropriately then the lag is no more than any other turbo setup.

1,2,&3 Exactly.... Gold heat shielding foil was used to line the underside of the trunk... Also this particular miata probably had issues due to the rear diffuser that acted as a heat collector.

4. Would at least probably need to have the oil pump re-geared to increase the oil pressure enough to overcome the frictional losses due to moving the oil that far in a relatively small diameter line

5. True

6. Once the car is at full boost its there no matter how much pipe there is but it would take longer to build up to full boost due to the larger volume of air needed. I assume you mean by using smaller diameter pipe you could eliminate some of the lag but you would also have to consider the limited flow capabilities.

[DirtyMechanic]

1,2,&3 Exactly.... Gold heat shielding foil was used to line the underside of the trunk... Also this particular miata probably had issues due to the rear diffuser that acted as a heat collector.

4. Would at least probably need to have the oil pump re-geared to increase the oil pressure enough to overcome the frictional losses due to moving the oil that far in a relatively small diameter line

5. True

6. Once the car is at full boost its there no matter how much pipe there is but it would take longer to build up to full boost due to the larger volume of air needed. I assume you mean by using smaller diameter pipe you could eliminate some of the lag but you would also have to consider the limited flow capabilities.

4. i have never seen a oil pump that needed to be upgraded. no more volume is needed seeing as the line once filled on start up. the volume flow will still be the same as if the turbo was right off the cylinder head. remember turbos dont need that much oil to run. i see alot of turbo blow out seals because people dont use restrictors.

6. dont forget just because you have flow doesnt mean you have velocity. which is where you need for high rpm power. if you have the velocity at low rpm due to a small charge pipe back to the front. you might run out of flow at higher rpm and boost psi. but if you have too big of a pipe you wont have the velocity at low boost psi and rpms and kill your bottom end but youll have your volume and velocity at high rpm for a serious top end. its a compromise really.

[OnURleft]

1st is an e60 BMW (2003+ 5-series)

I'm fairly certain that guy was flamed up and down for that set-up.

[carbongs]

nice ride, yeah not too sure how i feel about the setup but i'd rock it in a heart beat

[speedminded]

I'm fairly certain that guy was flamed up and down for that set-up.

I have no idea about the setup, just showing it as an example and BMW people flaming others doesn't mean one thing to me lol! Someone that knows how to build and tune turbo setups is a different story though...


People are afraid of things that are different. There are cars with 1,000 to 3000+hp using remote turbo setups.