Forced Induction Discussion of turbos , superchargers , and nitrous upgrades on the G35

serious fi question

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Old Jan 12, 2005 | 04:13 PM
  #1  
G-Mann's Avatar
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From: southlake, TX (DFW)
serious fi question

seriously, what would be the better settup:
(think about COST, performance, matainance)
OP1- vortech-headers-cats-exhaust-any extra mods
-how high can u push a vortech?
-could i put in rods&heads and boost it more?
-could i get 400-500 whp?

OP2:single/twin turbo setup-internals-exhuast-accesories for turbo
-if i wanted 400-500whp, would rods&heads be enough internal mods?
-what all accesories do i need for the turbo?


thank you for any help
 
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Old Jan 12, 2005 | 07:28 PM
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From: Glen Rose, Texas
Originally Posted by 2FAST4U_G35man
seriously, what would be the better settup:
(think about COST, performance, matainance)
OP1- vortech-headers-cats-exhaust-any extra mods
-how high can u push a vortech?
-could i put in rods&heads and boost it more?
-could i get 400-500 whp?

OP2:single/twin turbo setup-internals-exhuast-accesories for turbo
-if i wanted 400-500whp, would rods&heads be enough internal mods?
-what all accesories do i need for the turbo?


thank you for any help
Now, this is clearly my BIASED/educated/experienced opinion, but I would go with the Vortech, not additional breather mods other than exhaust (BORLA, INJEN or FUJISUBO) and replace the rod/pistons. I am getting around 400 to the wheels now and if I were to build the motor, the system is good for at least 16psi with pulley mods. It doesn't create as much TQ as TT or ST does, but it's a lot safer in my opinion. With the exception of BOOGER's fried ring (which was due to not pulling enough timing on the top end, from what I hear), what other Vortech'ed G have you heard of with issues? I know of at least 6 cases where the TT blew motors. Again, my BIASED/educated/experienced opinion. Let the flaming began!
 
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Old Jan 12, 2005 | 08:18 PM
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Originally Posted by Randys_G
Let the flaming began!
No flaming here.....just wondering what "About 400 rwhp/345 ftlbs" in your sig means. It is either 400rwhp or it is not. Just curious cause I am about to install a Vortech on my G.
 
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Old Jan 12, 2005 | 09:15 PM
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Sorry, Off Topic

Randy, what are you doing for traction? 1st gear is almost worthless when on the throttle. 2nd gear is not much better.

I am at the life's end of my SO3's and trying to decide what to get.
BFG ksw2's ????
 
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Old Jan 12, 2005 | 10:43 PM
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randy...- i was thinking the same thing tonight cause it would be alot cheaper and not as technical as a turbo. do u have rods and heads? with rods and heads the engine would be safe if i were to push it to 16psi right? and one more, how much hp to the wheels should i expect if i pushed it out to about 16psi?
sorry for all the questions, but it is crunch time as i almost have the money for going FI.

p.s.-thanks for all the info, u answered basically all my important ques.
 

Last edited by G-Mann; Jan 12, 2005 at 10:52 PM.
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Old Jan 12, 2005 | 11:09 PM
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No matter what you do to your engine it won't be safe if its not tuned right. Gurgen proved that. If you are really worried about reliablity I would say build the engine. Head work by itself probably wouldn't be too beneficial, but rods and pistons would be. To benefit from head work you'll need your entire intake/exhaust system optimized for MAJOR flow.
 
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Old Jan 13, 2005 | 12:40 PM
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From: Glen Rose, Texas
Originally Posted by Gman2004
No flaming here.....just wondering what "About 400 rwhp/345 ftlbs" in your sig means. It is either 400rwhp or it is not. Just curious cause I am about to install a Vortech on my G.
Ok, well, most of the veterans here know the story, but when I last tuned my car, the main belt was slipping and I was only making 6psi of boost on this 8psi system...with that said, I made 388rwhp and 335 ftlbs. I didn't have time to climb under the car to tighten at that time and have since upgraded to a GATES belt that is thicker and less prone to stretching. I was waiting for the belt to "seat" before doing a final tighten and retuning. My tuner said that at the rate I my chart showed, if I would have produced the full 8psi, I would have made around 405hp and 345 ft lbs. This is just his theory, but an educated one since it's Shawn Church at the infamous Churches Automotive Testing. I will post my new results as soon as I have them and thus the "about" comment.
 
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Old Jan 13, 2005 | 12:41 PM
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From: Glen Rose, Texas
Originally Posted by chops
Sorry, Off Topic

Randy, what are you doing for traction? 1st gear is almost worthless when on the throttle. 2nd gear is not much better.

I am at the life's end of my SO3's and trying to decide what to get.
BFG ksw2's ????
I tried some Yokohama AVS ES100's, but they didn't hook up any better. I'd go with a DR rated wheel. Maybe the Falken 451's?
 
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Old Jan 13, 2005 | 12:43 PM
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From: Glen Rose, Texas
Originally Posted by 2FAST4U_G35man
randy...- i was thinking the same thing tonight cause it would be alot cheaper and not as technical as a turbo. do u have rods and heads? with rods and heads the engine would be safe if i were to push it to 16psi right? and one more, how much hp to the wheels should i expect if i pushed it out to about 16psi?
sorry for all the questions, but it is crunch time as i almost have the money for going FI.

p.s.-thanks for all the info, u answered basically all my important ques.
Kevin answered part of your question and the other part is undetermined because no one has pushed this system to 16psi. Keep me posted.
 
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Old Jan 13, 2005 | 03:14 PM
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Randy knows best, Randy man can't wait to see some dyno runs and track days of your BEASTLY BEAST!!
 
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Old Jan 13, 2005 | 03:25 PM
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Keep in mind running a SCer at 16PSI means you will be spinning the compressor at TWICE the stock speed (roughly 40,000 RPM up from 20,000 RPM total guess of course). This is going to be extremely loud. With a SCer you can't just change pullys as needed like you can with a boost controller on a turbo. If you get the 16psi pullys you will be at 16psi EVERY day. Its really not a sensable way to go if you want to drive the car everyday and take the woman out on nice dates. I always get comments now on my stock boost ATI supercharger that my car sounds like 'boost' whenever I pull in anywhere. If the car is going to be a weekend warrior or something then disregard this info, I just thought I would throw it out in case you over looked it (like I did at the beginning).
 
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Old Jan 13, 2005 | 05:01 PM
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Originally Posted by KPierson
This is going to be extremely loud. With a SCer you can't just change pullys as needed like you can with a boost controller on a turbo. If you get the 16psi pullys you will be at 16psi EVERY day. Its really not a sensable way to go if you want to drive the car everyday and take the woman out on nice dates. I always get comments now on my stock boost ATI supercharger that my car sounds like 'boost' whenever I pull in anywhere. If the car is going to be a weekend warrior or something then disregard this info, I just thought I would throw it out in case you over looked it (like I did at the beginning).
Kevin,

Sorry to hijack this thread but realizing you live just 2 hours or so south of me (Toledo area), I'd love to come down sometime this spring or summer for a ride. I'm hoping to go FI sometime in the near future, either the APS TT, JWT TT, SF TT or APS ST. Getting the final approval from the wife is the biggest obstacle. I have no experience with the real world performance of FI on a VQ motor so a ride would be greatly appreciated. Let me know if that would be possible.

Thanks,
Brian
 
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Old Jan 13, 2005 | 05:24 PM
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haha thats cool we can set something up. I graduated from BGSU in 2002 and make it up to the Toledo area every now and again. I'll PM you next time I'm up that way. As soon as the car gets out of the body shop I'll be starting my 2nd FI build!
 
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Old Jan 13, 2005 | 05:36 PM
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damn..2 hours drive to check out the car?
peoples here in socal living within a stone throw of each other and we have hard time getting together
 
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Old Jan 13, 2005 | 05:49 PM
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thanks for all the info guys, now i wouldnt be running a 16psi pulley(maby for like track days or something) but this is my daily car so i would be running stock-mid(dont know if they make it but probly an 11psi pulley). i just was wondering how much hp can come out of a vortech.
 
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