Vararam Results!
Thread Starter
Le Mans Master
Joined: Jul 2009
Posts: 9,526
Likes: 12
From: Los Angeles California
Vararam Results!
I'm so amazed at how well the Vararam performed. I have to post this in full detail.
I'm 100% confident that the Vararam adds at least 40RWHP at speed. Here's my math:
Friend's 1998 C5 Coupe - ATI Procharged @ 9PSI (Approx 440RWHP)
Weighed in tonight at 3350Lbs with out him in it.
Him and his passenger were 180Lbs and 160Lbs.
My 2003 Z06 - Stock other than the Vararam.
Weighed in tonight at 3070Lbs with out me in it.
I weigh 150Lbs.
He has approximately 470Lbs on my car with drivers and passenger.
Using the rule of thumb as 10Lbs / 1HP, his car is making an equivalent of 393RWHP.
Stock Z06s generally dyno around 360-370RWHP. Vararam claims approximately 40HP throughout the RPM band.
With me in the car, my car is making the equivalent to 345HP.
OK, now that the bench racing math is done, the actual results:
(Done on a closed course of course)
From a roll starting at 55MPH, we're door-to-door all the way past 130MPH!!!!
That means that I'm making at least 391 equivalent HP. That equates to about 400RWHP from a totally stock Z06.
The Vararam is NO joke.
I'm 100% confident that the Vararam adds at least 40RWHP at speed. Here's my math:
Friend's 1998 C5 Coupe - ATI Procharged @ 9PSI (Approx 440RWHP)
Weighed in tonight at 3350Lbs with out him in it.
Him and his passenger were 180Lbs and 160Lbs.
My 2003 Z06 - Stock other than the Vararam.
Weighed in tonight at 3070Lbs with out me in it.
I weigh 150Lbs.
He has approximately 470Lbs on my car with drivers and passenger.
Using the rule of thumb as 10Lbs / 1HP, his car is making an equivalent of 393RWHP.
Stock Z06s generally dyno around 360-370RWHP. Vararam claims approximately 40HP throughout the RPM band.
With me in the car, my car is making the equivalent to 345HP.
OK, now that the bench racing math is done, the actual results:
(Done on a closed course of course)
From a roll starting at 55MPH, we're door-to-door all the way past 130MPH!!!!
That means that I'm making at least 391 equivalent HP. That equates to about 400RWHP from a totally stock Z06.
The Vararam is NO joke.
Last edited by SCM_Crash; May 8, 2010 at 07:00 AM.
Race Director
Joined: Jul 2007
Posts: 18,681
Likes: 47
From: Reno is so close to Hell you can see Sparks , State Of Confusion
St. Jude Donor '12-'13-'14
Lets see, You are saying your friend has a Procharged coupe @9psi and you have a stock Z with a VariRam and you guys were door to door. There has to be something wrong with his set up, He should of ate you alive. Well maybe not alive, But he sure should of pulled on you.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
It sounds good but believe me I think your buddies RWHP are a little low for the ProCharger - was it done on a Mustang Dyno?
I agree the VARARAM is no joke and is a great piece but stock the C5 Z06 puts down right around 350 RWHP (Seen it multiple times) if you have had a tune then you should be able to pick-up to about 370 RWHP.
Is your friend '98 MN6 or A4? if they are not the same tranny then you will have different variables such as gearing. If both have a MN6 then gearing in the rear is the same but not in the tranny - the C5 Z06 has different ration within the tranny, for performance.
Is there anymore infor? can you guys do a grudge match at the track or a rolling start somewhere safe?
Thanks,Matt
I agree the VARARAM is no joke and is a great piece but stock the C5 Z06 puts down right around 350 RWHP (Seen it multiple times) if you have had a tune then you should be able to pick-up to about 370 RWHP.
Is your friend '98 MN6 or A4? if they are not the same tranny then you will have different variables such as gearing. If both have a MN6 then gearing in the rear is the same but not in the tranny - the C5 Z06 has different ration within the tranny, for performance.
Is there anymore infor? can you guys do a grudge match at the track or a rolling start somewhere safe?
Thanks,Matt
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
I'm guessing the coupe was an A4 with 2.73 gears and bone stock other than the procharger and a passenger.
You can look at my dyno numbers on the Z, it is as high as you're going to get with all the bolt ons and I come in at 401 rwhp.
Gearing can pretty easily overcome 100 hp especially with a horrible 4l60e and 2.73 gearing. If it was an M6 versus M12, 100 hp difference is gonna eat you alive.
You can look at my dyno numbers on the Z, it is as high as you're going to get with all the bolt ons and I come in at 401 rwhp.
Gearing can pretty easily overcome 100 hp especially with a horrible 4l60e and 2.73 gearing. If it was an M6 versus M12, 100 hp difference is gonna eat you alive.
Last edited by Z06Electron; May 8, 2010 at 10:22 AM.
Thread Starter
Le Mans Master
Joined: Jul 2009
Posts: 9,526
Likes: 12
From: Los Angeles California
He's a 6 speed. He originally dyno'd 408rw on 5lbs of boost. Changed the bracket to the new A&A setup and is now boosting to 9psi. We've consistently seen 360rw from bone stock c5zs. I haven't dyno'd my car yet, but it feels strong compared to my other z. I'll post more when I get good. i'm typing on my phone right now.
Melting Slicks
Joined: Sep 2006
Posts: 2,728
Likes: 142
From: Iowa
I think someone is a bit too enthusiastic about his new mod. 
I'd be more concerned about your friend only putting down 440rwhp with Procharger at 9psi. I've heard of conservative tunes, but holy crap.
I'd be more concerned about your friend only putting down 440rwhp with Procharger at 9psi. I've heard of conservative tunes, but holy crap.
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Burning Brakes
Joined: Apr 2010
Posts: 753
Likes: 0
From: Spring Hill TN
For what its worth at A&A my 2002 z06 with a vararam and tune and no other mods put down 385.7 hp , I dont have a baseline but if it was laying down 350 hp like some others stated its would have been 35 hp gain with a tune probably more so at speed as the dyno does not pick up the ram effect eh. Just stating my experience with FWIW
Last edited by BHRZ06; May 8, 2010 at 04:10 PM.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
For what its worth at A&A my 2002 z06 with a vararam and tune and no other mods put down 385.7 hp , I dont have a baseline but if it was laying down 350 hp like some others stated its would have been 35 hp gain with a tune probably more so at speed as the dyno does not pick up the ram effect eh. Just stating my experience with FWIW
Burning Brakes
Joined: Apr 2010
Posts: 753
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From: Spring Hill TN
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
What are you even saying here. Sounds like you need more air.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
There is no ram effect.... the motor will only ingest what it wants, unless the air is compressed, by a super charger, magna charger,turbo etc. the only real increase is the available cold air found outside of the engine bay.,.. which equates to 1.5 hp for every 10 degrees of colder air than that found under the hood. if its an 80 degree day outside and the under hood air temp is 130 ( air temp not engine temp ) thats 50 degrees in this case.. or an increase over stock of 5 X 1.5 = 7.5 hp. Thats it
The 1.5 hp is rated by dyno testing procedures for ambient temps, also called corrected dyno numbers.
The 1.5 hp is rated by dyno testing procedures for ambient temps, also called corrected dyno numbers.
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
There is no ram effect.... the motor will only ingest what it wants, unless the air is compressed, by a super charger, magna charger,turbo etc. the only real increase is the available cold air found outside of the engine bay.,.. which equates to 1.5 hp for every 10 degrees of colder air than that found under the hood. if its an 80 degree day outside and the under hood air temp is 130 ( air temp not engine temp ) thats 50 degrees in this case.. or an increase over stock of 5 X 1.5 = 7.5 hp. Thats it
The 1.5 hp is rated by dyno testing procedures for ambient temps, also called corrected dyno numbers.
The 1.5 hp is rated by dyno testing procedures for ambient temps, also called corrected dyno numbers.
I am absolutly SURE that I picked up more than 7-10 hp on those 50* mornings.
Add that to the 2+ tenths guys are picking up at the track, and there's some hp gains from somewhere
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
1.5 hp for every 10 degrees is a little low IMO. According to the old "how to build a chevy small block" manual, they listed the #s a little closer to around 1% per 10 degrees. (400hp engine @ 50* difference = 4 X 5 = 20 hp) I don't think those drag cars would spend all the money and decrease their aerodynamics by adding those large hood scopes if they were only picking up 7hp.
I am absolutly SURE that I picked up more than 7-10 hp on those 50* mornings. Add that to the 2+ tenths guys are picking up at the track, and there's some hp gains from somewhere
I am absolutly SURE that I picked up more than 7-10 hp on those 50* mornings.
Add that to the 2+ tenths guys are picking up at the track, and there's some hp gains from somewhereLast edited by Evil-Twin; May 8, 2010 at 08:43 PM.
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
The only results that matter to me at the ones I see at the track.
02 Coupe (A4 with 2.73s):
Bone Stock - 13.18 @ 106.47 mph
Vararam Only - 12.88 @ 109.55 mph (only made 1 run)
The Vararam helped my by 3 tenth and 3+ mph.
02 Coupe (A4 with 2.73s):
Bone Stock - 13.18 @ 106.47 mph
Vararam Only - 12.88 @ 109.55 mph (only made 1 run)
The Vararam helped my by 3 tenth and 3+ mph.
Racer
Joined: Apr 2010
Posts: 385
Likes: 0
From: Corona California
I stand corrected, it is 1% per 10 degrees, its actually more than 1 %... closer to 1.4 % as used for corrected dyno numbers. I got my head around horse power and not percentage... I can admit making a mistake here... but the OP is way overzelous with his SOTP meter. BTW I do not like making post that are incorrect, Thank you for helping me to make my post accurate. I wont change my original [post... just to show that your post was correct
Good posting man!
Racer
Joined: Apr 2010
Posts: 385
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From: Corona California
