Is 5 Psi even worth doing?
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,157
Likes: 154
From: The Arid Sunny Desert
Is 5 Psi even worth doing?
I mean how much power can I possibly see from such a low boost figure? The reason that I ask is that my '99 is currently getting a Procharger installed with the intention of keeping it really mild with a conservative tune. I already have a heads/cam setup with all the bolt-ons and I'm not sure how much my stock bottom end can safely handle. I do not have a spare motor laying around nor the money to to fix a blown motor. All that would result is a car in my garage under a cover until who knows when. If I last dynoed at 385 RWHP in 100 degree heat(I've seen 405 on this setup in cooler weather), what can I expect from a 5 psi setup? Thanks
Racer
Joined: Aug 2003
Posts: 324
Likes: 0
From: Frederick MD
My car went from 388rw to 544rw on 6psi with my Vortech kit. My only other power mods were LG long tubes w/RT cats (stock mufflers) and a Halltech TRAP lower airfilter. That was the setup I had when I ran the time in my sig pic.
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
Not even around the block.. it's at least 8 or give the kit to someone else. j/k... seriously though it's not worth the money invested especially since most kits have the potential to run 8 efficiently and your stocker can run 10-12 w/ a good tune.
Arnel
Arnel
Burning Brakes
Joined: Oct 2002
Posts: 797
Likes: 1
From: Sunny Earthquake Country, USA On the Left Coast (which is becoming more Right!)
How much from 5 PSI boost...
Multiply your present HP by (5+14.7) and divide by 14.7
400x19.7 divided by 14.7=536 RWHP.
Probably be about 510 to 520 RWHP.
My best guess.
Roy
400x19.7 divided by 14.7=536 RWHP.
Probably be about 510 to 520 RWHP.
My best guess.
Roy
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
Originally Posted by Pewtavert
Is 5 Psi even worth doing? I mean how much power can I possibly see from such a low boost figure?
Originally Posted by Pewtavert
I already have a heads/cam setup with all the bolt-ons and I'm not sure how much my stock bottom end can safely handle.
That isn't to say that occasionally people don't lose motors at that power level, but with a solid tune and good fuel it's unlikely, at least for a while..
Originally Posted by Pewtavert
I do not have a spare motor laying around nor the money to fix a blown motor.
There is no shame in driving your heads/cam car and just having fun with it while you sock away a few bucks for a forged short block.
Good luck,
Mark
Drifting
Joined: Aug 2001
Posts: 1,260
Likes: 6
From: Thousand Oaks California
Originally Posted by mdhmi
I would strongly urge you to carefully consider how badly you want to add that next 100 rwhp. If you can't afford a new short block (and potentially long block if blows just right) I would wait until you can before pulling the trigger on a supercharger or turbo package.
There is no shame in driving your heads/cam car and just having fun with it while you sock away a few bucks for a forged short block.
Good luck,
Mark
There is no shame in driving your heads/cam car and just having fun with it while you sock away a few bucks for a forged short block.
Good luck,
Mark
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Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,157
Likes: 154
From: The Arid Sunny Desert
Mark, Great points but unfortunately I am an impulse buyer, who has been driving my heads/cam car around for over six years with no shame. My car is at The Vette Doctors as we speak having the Procharger installed in an attempt to quell this impulsive need for some more speed. Maybe it was the last trip to E-Town where I posted my best time of 11.996 @ 115 which gave me renewed enthusiasm for those wacky Vette Doctors guys and what a great job they have done for me over the years. I thought how great would 11.5 @ 125 be??????? Based on these fantasies and recommendations from Vette Docs........the Procharger goes in.
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
Originally Posted by Pewtavert
I thought how great would 11.5 @ 125 be???????
Originally Posted by Pewtavert
Based on these fantasies and recommendations from Vette Docs........the Procharger goes in.
Is your fuel system and driveline already upgraded?
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,157
Likes: 154
From: The Arid Sunny Desert
P1SC Tuner Kit with the newest bracket and belt design, that's all i know about the kit. I left everything up the tuner and my only requirement was to make the motor live while making the most reliable HP (A real easy trick huh?). As I understand it they order the 42# injectors separately and use their own proprietary tune. The driveline has been upgraded with a Vette Doctors built A4, Kooks LT's with no cats, 3.90's with hardened shaft, bilstein shocks and Hotchkis sway bars. I am also having a DeWitts radiator installed for good measure. The rest of my mods are in my sig.
Team Owner
Joined: Apr 2001
Posts: 26,794
Likes: 614
From: Elmhurst, IL (West Suburb of Chicago) & Home of MEGA Horsepower
St. Jude Donor '06
Originally Posted by master blaster
run some alky or torco and it will give you more saftey....turn up the boost!
Since your so concerned about safety on your motor run 100% alky like I do for an insurance policy. With alky 5 to 7lbs should be a no brainer, assuming a PROFESSIONAL TUNE and INSTALL and VETTE DOCTORS are cetainly great tuner!!! 
Drifting
Joined: May 2001
Posts: 1,392
Likes: 0
From: Wabash,IN
CI 7-8-9-10 Veteran
St. Jude Donor '08
the p1sc kit is what i used and it a nice kit, I think they are using a bracket close to andys design im running 6 lbs on mine and it like day and night. Im stock except for borlas out the back and im at 432 rwhp they tuned me back because they think i have a spring issue !! have fun and enjoy
Melting Slicks
Joined: Nov 2003
Posts: 3,396
Likes: 2
From: North Manchester Indiana
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Originally Posted by jparr
the p1sc kit is what i used and it a nice kit, I think they are using a bracket close to andys design im running 6 lbs on mine and it like day and night. Im stock except for borlas out the back and im at 432 rwhp they tuned me back because they think i have a spring issue !! have fun and enjoy
sorry not sure what i did
Melting Slicks
Joined: Aug 2003
Posts: 3,306
Likes: 5
Originally Posted by Pewtavert
Mark, Great points but unfortunately I am an impulse buyer, who has been driving my heads/cam car around for over six years with no shame. My car is at The Vette Doctors as we speak having the Procharger installed in an attempt to quell this impulsive need for some more speed. Maybe it was the last trip to E-Town where I posted my best time of 11.996 @ 115 which gave me renewed enthusiasm for those wacky Vette Doctors guys and what a great job they have done for me over the years. I thought how great would 11.5 @ 125 be??????? Based on these fantasies and recommendations from Vette Docs........the Procharger goes in.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 7,157
Likes: 154
From: The Arid Sunny Desert
Originally Posted by BlackMagicC5
So not only are you modifying and racing your C5, but your starting to get brave and look for the limits but don't have the money to fix anything that goes wrong, including the motor. I can already tell you now that your screwed.