Losing RWHP with MODS..
Melting Slicks
Joined: Aug 2002
Posts: 2,737
Likes: 2
From: California USA
Hello just a few thoughts on what i can see--There really isn't a whole lot more HP to be gained between the LS6 cam and your 224@114cam.To make some better #'s you need to get the LSA down to at least 112 and that would make the greatest difference---Also---I see your WOT AFR keeps dropping---from 12.8 to 12.6 to 12.3 You are leaving some power behind there--You need to get it back up to 12.8 again.Also What is your total timing @ WOT ??? with 10.750-1 comp ratio and good gas you should make best power between 24-28* just as an approx guess. Long tubes even cheap ones tuned properly should gain 20 RWHP always ......I have STOCK LS6 heads and a .221 cam @114 (calif smog legal) long tubes and a good tune and I made 380 RWHP with a Fast 78mm manifold on an A4.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
I tend to agree w/this statement. Exh Scavening w/cams greater than 112 LSA is sort of a waste of time. Don't forget he is also bleeding off cylinder pressure w/that cam. Cam timing events don't match stock, so spark is probably off too. Sounds like time for a good tune up to match the package.
I do have a better tune as of yesterday. Went from 360RWHP to 376RWHP torque went up from 344RWTQ to 350 RWTQ.The tune before left a lot of horses in the stable by tuning too rich.
Next is Patriot heads to install.
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's the Heads!
If you go with a set of Patriot Heads you will deffinetely see a big difference and will Dyno higher!
If you still want to get better numbers go with the TFS Heads(Trick Flow) It will push your combo to where I believe you should be! These heads will surpass the Patriot's far and wide!
Remember that any combo is as good as the heads are!
Thanks,Matt
If you go with a set of Patriot Heads you will deffinetely see a big difference and will Dyno higher!
If you still want to get better numbers go with the TFS Heads(Trick Flow) It will push your combo to where I believe you should be! These heads will surpass the Patriot's far and wide!
Remember that any combo is as good as the heads are!
Thanks,Matt
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
It's the Heads!
If you go with a set of Patriot Heads you will deffinetely see a big difference and will Dyno higher!
If you still want to get better numbers go with the TFS Heads(Trick Flow) It will push your combo to where I believe you should be! These heads will surpass the Patriot's far and wide!
Remember that any combo is as good as the heads are!
Thanks,Matt
If you go with a set of Patriot Heads you will deffinetely see a big difference and will Dyno higher!
If you still want to get better numbers go with the TFS Heads(Trick Flow) It will push your combo to where I believe you should be! These heads will surpass the Patriot's far and wide!
Remember that any combo is as good as the heads are!
Thanks,Matt
Instructor
Joined: Jan 2004
Posts: 211
Likes: 0
From: Michigan City Indiana
You don't loose HP at the engine, the Dyno just measures less.
The faster you accelerate something, the more power it takes. Steeper rear gears mean that the drivetrain will accelerate more quickly, so more power is consumed due to parasitic loss. The engine is still making the same power, and the car is accelerating more quickly thanks to increased torque multiplication, but the actual measured HP is lower because more of the engines power is required to accelerate the drivetrain quicker.
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
It's the Heads!
If you go with a set of Patriot Heads you will deffinetely see a big difference and will Dyno higher!
If you still want to get better numbers go with the TFS Heads(Trick Flow) It will push your combo to where I believe you should be! These heads will surpass the Patriot's far and wide!
Remember that any combo is as good as the heads are!
Thanks,Matt
If you go with a set of Patriot Heads you will deffinetely see a big difference and will Dyno higher!
If you still want to get better numbers go with the TFS Heads(Trick Flow) It will push your combo to where I believe you should be! These heads will surpass the Patriot's far and wide!
Remember that any combo is as good as the heads are!
Thanks,Matt
The initial mod set is LS6 heads + ST headers. You add LT and gears and get more power. Then you add a cam and don't get any more power. With stock heads, I wouldn't expect to get massive gains from one cam to another.I have a similar cam (not sure of the exact spec) and I put down 419RWHP/389RWTQ on an A4 w/3.42's
Le Mans Master
Joined: Jul 2004
Posts: 7,727
Likes: 7
From: Twilight zone
St. Jude Donor '05-'06
OOOh,
I am watching this sleeper!
You have almost mirrored my mod setup(I am jumping up to lg pro's real soon from shorties,next the cam.........and I just installed the 3:42's)
My last dyno was 337/342 w the stock ls1 cam,243's and 3:15's
It'a actually really neat that our mods are so close,at certain points..
I was thinking of going with the same cam, but maybe a 228 ex duration.
I wonder if that would gain anything over the straight up 224 cam( prolly not much)
Anyways, I am
around, watching my new mods come to pass
Thanks for doing all my research!
BTW,Those are real nice numbers for stock 243's and an a-4!
I am watching this sleeper!
You have almost mirrored my mod setup(I am jumping up to lg pro's real soon from shorties,next the cam.........and I just installed the 3:42's)
My last dyno was 337/342 w the stock ls1 cam,243's and 3:15's
It'a actually really neat that our mods are so close,at certain points..
I was thinking of going with the same cam, but maybe a 228 ex duration.
I wonder if that would gain anything over the straight up 224 cam( prolly not much)
Anyways, I am
around, watching my new mods come to passThanks for doing all my research!
BTW,Those are real nice numbers for stock 243's and an a-4!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
OOOh,
I am watching this sleeper!
You have almost mirrored my mod setup(I am jumping up to lg pro's real soon from shorties,next the cam.........and I just installed the 3:42's)
My last dyno was 337/342 w the stock ls1 cam,243's and 3:15's
It'a actually really neat that our mods are so close,at certain points..
I was thinking of going with the same cam, but maybe a 228 ex duration.
I wonder if that would gain anything over the straight up 224 cam( prolly not much)
Anyways, I am around, watching my new mods come to pass
Thanks for doing all my research!
BTW,Those are real nice numbers for stock 243's and an a-4!
I am watching this sleeper!
You have almost mirrored my mod setup(I am jumping up to lg pro's real soon from shorties,next the cam.........and I just installed the 3:42's)
My last dyno was 337/342 w the stock ls1 cam,243's and 3:15's
It'a actually really neat that our mods are so close,at certain points..
I was thinking of going with the same cam, but maybe a 228 ex duration.
I wonder if that would gain anything over the straight up 224 cam( prolly not much)
Anyways, I am
around, watching my new mods come to passThanks for doing all my research!
BTW,Those are real nice numbers for stock 243's and an a-4!
o
I recommend that you go with American Racing headers. They come with cats for around $1700.These gain some great HP over the Bassanis I have.
Come to find out as I was told that hi-flow cats don't last long. I have the Magnaflow hi- flow cats and one or both are going bad.I may go back to OEM cats if there isn't too much of a HP lost.
Heads are next as soon as my lifters come in.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
A stronger torque converter will work wonders to your power to the rears.
If you're using the bassini 4-2-1 headers, you'll get a much stronger midrange but sacrifice peak HP/Tq at the higher RPMs. The 4-1 design is best for maximum power but you only get it around 5K RPM
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
A stronger torque converter will work wonders to your power to the rears.
If you're using the bassini 4-2-1 headers, you'll get a much stronger midrange but sacrifice peak HP/Tq at the higher RPMs. The 4-1 design is best for maximum power but you only get it around 5K RPM
If you're using the bassini 4-2-1 headers, you'll get a much stronger midrange but sacrifice peak HP/Tq at the higher RPMs. The 4-1 design is best for maximum power but you only get it around 5K RPM
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
I can't seem to find any specs on the bassini site that match your description...but they don't have any pictures. I agree about the clamps. Depending on the material. you might try getting a good welder to seal them up.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Thanks
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
You don't loose HP at the engine, the Dyno just measures less.
The faster you accelerate something, the more power it takes. Steeper rear gears mean that the drivetrain will accelerate more quickly, so more power is consumed due to parasitic loss. The engine is still making the same power, and the car is accelerating more quickly thanks to increased torque multiplication, but the actual measured HP is lower because more of the engines power is required to accelerate the drivetrain quicker.
The faster you accelerate something, the more power it takes. Steeper rear gears mean that the drivetrain will accelerate more quickly, so more power is consumed due to parasitic loss. The engine is still making the same power, and the car is accelerating more quickly thanks to increased torque multiplication, but the actual measured HP is lower because more of the engines power is required to accelerate the drivetrain quicker.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I believe the only header that Bassani makes is a Tri-Y design. I have the QTP's, which are a stainless Tri-Y design. If you read some of Burn's articles, he prefers a properly tuned Tri-Y to the 4-1 header design.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection