SDPC 440ci Dyno Numbers!
#1
SDPC 440ci Dyno Numbers!
We finished the build of a customer's 2000 Camaro SS this last week. The car has our LS7 ased 400 shrot block, PRC CNC'd L92 heads and the stock L76 intake, 60# injectors (for a dry shot later on), 240/252 114LSA camshaft, Kooks 1 7/8" LT's, true duals with some funky mufflers. The car is a 6 speed with a 3.73 equipped 9" rear-end. It has the stock MAF on it.
After the tune (Thanks Jason @ Texas Speed!!), the car made 515rwhp and right about 485ftlbs of torque. I'll post the graph Monday, but the torque curve is nice! The torque is already close to 450ftlbs by 2000rpm!! Peak horsepower was around 6400rpm if I recall correctly.
After the tune (Thanks Jason @ Texas Speed!!), the car made 515rwhp and right about 485ftlbs of torque. I'll post the graph Monday, but the torque curve is nice! The torque is already close to 450ftlbs by 2000rpm!! Peak horsepower was around 6400rpm if I recall correctly.
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Last edited by Scoggin Dickey; 08-06-2007 at 09:26 AM.
#2
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what might be holding that back? i would think it would make more whp. the 500 ftlbs is great, only reason iam asking is my 416 made all most that with livernoise cnc l92 and i thought it was being held back.
#4
LS1 Tech Administrator
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Great seeing more L92 headed motors over 500 rwhp.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
#6
I think the L76 intake, stock MAF, restrictive mufflers, and the 3.73's 9 bolt are all keeping it from being a dyno queen. We will be addressing those issues with the customer in the future and working on this some more, but for now I think the numbers are in line where they should be!
Yall will like the torque curve! I should have remembered to bring the dyno sheet home to scan it so that I could get it uploaded sooner
Yall will like the torque curve! I should have remembered to bring the dyno sheet home to scan it so that I could get it uploaded sooner
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#7
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Originally Posted by Matt @ SDPC
We finished the build of a customer's 2000 Camaro SS this last week. The car has our LS7 ased 400 shrot block, PRC CNC'd L92 heads and the stock L76 intake, 60# injectors (for a dry shot later on), 240/252 114LSA camshaft, Kooks 1 7/8" LT's, true duals with some funky mufflers. The car is a 6 speed with a 3.73 equipped 9" rear-end. It has the stock MAF on it.
After the tune (Thanks Jason @ Texas Speed!!), the car made 515rwhp and right about 500ftlbs of torque. I'll post the graph Monday, but the torque curve is nice! The torque is already close to 450ftlbs by 2000rpm!! Peak horsepower was around 6400rpm if I recall correctly.
After the tune (Thanks Jason @ Texas Speed!!), the car made 515rwhp and right about 500ftlbs of torque. I'll post the graph Monday, but the torque curve is nice! The torque is already close to 450ftlbs by 2000rpm!! Peak horsepower was around 6400rpm if I recall correctly.
D.J.
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#8
TECH Fanatic
split is to address I/E ratio rather than anything past the port IIRC.
A log showing MAP pressure at WOT would indicate if there was an intake restriction. If it differs from Barro, then there is the answer at least on the intake side anyway.
A log showing MAP pressure at WOT would indicate if there was an intake restriction. If it differs from Barro, then there is the answer at least on the intake side anyway.
#9
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Thanks ringram, I understand the I/E ratio at the head. But I believe the system should be looked at as a whole as well. Most of us can't run open headers. I also understand that a restricted intake would pull a vacuum at WOT. Patrick G. has addressed the down stream aspect of his exhaust system by using a merge collector at the junction where both header/exhaust pipes meet on a F-body. I am assuming he is using it for that effect......................I brought up the L-92 head issue in the past and someone brought up the point of the L-92 being not respected due to it's low cost. I don't know how much cheaper a CNCed L-92 is over a box stock LS-7 head. I'm sure some of the guys here will chime in later on today and set me straight. To me that LS-7 head is a great value given the Ti valves and light weight exhaust valve and it's flow data. I know guys have brought up the lash caps coming off using high lift cams, etc. but Katech says that hasn't been a problem on their builds, (Spintron & real world data).
D.J.
D.J.
Last edited by OneQuickCoupe; 08-05-2007 at 07:40 AM.
#10
There's the graph! It actually made power a little higher up than I had remembered, as you can see! We'll get a bigger MAF and some mufflers that flow (or straight pipes) on the car and she should see 525rwhp or so.
And yes, to answer the questions about the camshaft....the camshaft was designed to aid the exhaust performance a bit. Because of the weaker exhaust side of the L92 heads (same goes for the LS7 heads actually) and these weak/restrictive mufflers we decided to give it some extra split to help the situation.
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#12
UPDATE: The car had some throttle control issues with the bracket that was fabricated for the L76 intake (cable driven TB car)....now it's is going 100% TPS and it made 530rw with 502tq
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WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
800-456-0211 / PM / Facebook
WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
#16
I also liked where the power curve laid up top....not the L76 intake issues you see alot of falling on its face around 6400rpm or so
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WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
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WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
#17
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Originally Posted by Matt @ SDPC
UPDATE: The car had some throttle control issues with the bracket that was fabricated for the L76 intake (cable driven TB car)....now it's is going 100% TPS and it made 530rw with 502tq
Most of that gain was actually from the retune that was done at Real Performance Motorsports in Lewisville......