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408 results part II

 
Old 12-01-2007, 05:01 AM
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Originally Posted by Tony Mamo @ AFR View Post
It was a typical late night for me working in my shop at the house when my cell phone rang just after 10 PM yesterday evening. Turns out it was a phone call from my friend George Lara, a respected tuner in the So Cal area and an all around good guy. I had been waiting for this call for a few weeks, not to mention this project originated almost 6 months ago, but isn’t that par for these types of things anyway.

Back in April I had gotten involved with a C6 project belonging to Greg Schult….seems Greg and his brother Alex are somewhat competitive and with the two of them recently purchasing C6 Corvettes, the stage was set for some power mods to up the ante. Alex went the Magnuson forced induction route and put down some respectable numbers with basically the stock C6 short (490 RWHP / 490 RWTQ thru an A4) and Greg contacted me inquiring whether we could come close or possibly beat those figures with an N/A build. Initially we had moved forward with a package designed to optimize the stock 6 litre block in his car but somewhere between the start of this project and his brother on the dyno….LOL, Greg decided to get with LME on a 403 stroker to make things more interesting. Besides spec’ing a larger cam, most of the work on my end remained the same. We used a set of 205’s that I opened up the chambers and did some light porting work to optimize their small efficient ports (like I helped Pat G. and a few others with), ported a FAST and an LS2 TB, and sent him shopping with a list of the other supporting mods in the recipe (Yella Terra rockers, EWP, lightweight clutch, etc. etc.).

I was hoping to see around 525 RWHP with 500 TQ, and felt if everything really came together there was a chance it might make a little more. BTW, with a set of 1.875 Kooks headers already installed on the car (and a CAI as well I believe), on the same Dynopack wheel dyno over at Haddad Motorsports where the tune and the install was performed, the car put down 375/375 as a baseline prior to the engine swap. Pretty much solid textbook numbers for 364 CID engine and an M6 driveline with those mods (similar to others I have seen). The baseline dyno graph is included below to compare the data and shape of both curves….

Here are the final results….



I was especially surprised and pleased at how well the TQ curve carried without the band-aid of a monster sized cam which would have obliterated the bottom end and hurt drivability, essentially getting away from the well rounded package I was shooting for. While this technically isn’t an out of the box 205, the finished port volume is within a couple of cc’s of that showing once again that “area under the curve” flow coupled with good port velocity and a well thought out combination is more powerful than most realize. Picture the throttle response this animal has with all that power and a tiny 205cc intake port….its a lethal street combination.

This car made over 550 RWHP on five consecutive back to back runs (500-503 TQ) with the best registering 558 at an A/F ration George felt was a touch aggressive (13.7-13.8 over 6K), so he fattened it up a bit to give Greg a little more hip room on the street. Down in the low 13's the car still rolled 552/500 with a much more conservative A/F across the curve.

For those interested here is the flow data from Greg’s 205 heads tested on a 4” bore (on May 2nd no less!....lol)

Intake
Lift…..CFM
.200…..151
.300…..220
.400…..266
.500…..293
.550…..302 (peaked at .575 @ 306 CFM)
.600…..301

Exhaust (w/ 1.875 pipe)

.200…..129
.300…..190
.400…..228
.500…..242
.600…..248

Note how strong the exhaust port flows after the chamber and light porting work….It’s close to 200 CFM (more than a stock head’s peak flow) by .300 and as early as .400 matches a lot of aftermarket heads average .600 number at 228 CFM. Due to this situation and the very high overall exhaust to intake ratio (82%) a single pattern cam (244/244) was obviously a good choice here and proved effective on the dyno.

A quick summary of this combination is as follows because I know a lot of you will be asking…

403 Shortblock (built by LME)
11.6 CR
AFR 205’s with reworked 4” bore chambers and some light porting in key areas
Ported FAST 90 / Ported GM LS2 TB
Custom Comp Cam 244/244 XER lobes 113 LSA
ASP Underdrive pulley
Mezeirre EWP
Kooks 1.875 headers (with Cats btw!)
QuarterMaster clutch/flywheel assembly
M6 driveline with stock rear gears (3.42)
SVO “green top” 42” injectors
Vortex Ram air CAI (85 mm)
Nology ignition wires

Thanks to LME for all their hard work on the short….Mike and crew @ Haddad Motorsports for the install and “storage”….LOL, and George Lara who put all the pieces together with a killer tune. Look for some idle clips and video footage of this combination in the near future as well as an article in one of the Vette specific Mags….

Regards,
Tony Mamo
Thanks Tony for sharing, as always good info.

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Old 12-02-2007, 04:17 AM
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I just finished my build this week. LME 408 TFS 225s and a custom cam from Synergy Motorsports. 569 RWHP and 538 RWTQ. I was pleasantly surprised by the numbers and the car still drives like my 228 cam did. The only thing we haven't figured out is why it stopped making power at 6k, but for right now i'm happy with it. Waiting on graph to get e mailed to me since i don't have a scanner. Motor was built for a 250 shot but that will have to wait till i get the cage in.

LME 408
DragonSlayer crank
Callies rods
Weisco pistons
TFS 225's
custom cam
FAST 90
Attached Thumbnails 408 results part II-ryan98transam.jpg  

Last edited by transAm-98; 12-05-2007 at 07:15 PM.
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Old 12-15-2007, 03:02 AM
  #43  
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Can we sticky this like the cam only dyno thread? That way people don't have to post what did your 408 make...Just a thought. I will continue to keep it up to date when new posts are added unless one of the mods wants to do it.

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Old 12-22-2007, 01:03 PM
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Here is my set-up:

New LQ9 Block Bored .010 over

Callies Magnum 4.0 in. Stroker Crank

Callies Compstar Rods

Diamond -10cc Pistons

Stage 2 5.3 60cc Heads 2.02/1.57 Valves

Comp XE-R 245/250 .611 .614 on 112

Ported FAST 90 and NW 90.

UD Pulley

K&N FIPK Intake with Stock MAF

Jet Hot 1 3/4 Headers, Hooker ORY, Magnaflow Exhaust.

Delfi-Lucas 42# injectors, Racetronix PNP Kit

Tuned By Jeremy Formato

The car made 502 rwhp and 463 rwtq.

I didn't even open the cut-out for the dyno runs because I forgot about it and the car was already strapped down. So I think it still has some in it.

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Old 12-23-2007, 04:15 AM
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The cutout could be worth like 10 or more HP depending how restricted your exhaust setup is. Updated. Good job though, great torque curve.

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Old 12-25-2007, 11:44 PM
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some quick ones, I know were posted

Originally Posted by 408zo6
Dynoed my car today at New Era Performance Parts and it made 551rwhp and 490rwtq, mods in sig. Tomorrow we will be spraying a 300 shot . I'll post later to tell you what it mades on the squeeze.
break-in tune
1st sg 100shoot 665hp 661tq
+2nd sg 200 at 5K 845hp 786tq

https://ls1tech.com/forums/showthrea...&highlight=408


2nd. M6 T/A. forged 400cid, hellion cam, stage II Patriot heads (worked over LS6's) BBK intake and BBK 80mm TB, SLP exhaust, UD pulley, Ram powergrip HD. 483 HP 458 TQ. lookin forward to sprayin it. tuned my [email protected]
http://i2.photobucket.com/albums/y18...7builds020.jpg

SS M6. 402 LME motor, L92 heads, L76 intake, 239/246 .600 lift 114 lsa, Nick Williams TB, Ram powergrip HD, Stock cat back. 505 HP 477 TQ through the cutout..tuned my [email protected]
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Old 12-26-2007, 01:01 AM
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Originally Posted by studderin View Post
some quick ones, I know were posted
Originally Posted by Originally Posted by 408zo6
Dynoed my car today at New Era Performance Parts and it made 551rwhp and 490rwtq, mods in sig. Tomorrow we will be spraying a 300 shot . I'll post later to tell you what it mades on the squeeze.



break-in tune
1st sg 100shoot 665hp 661tq
+2nd sg 200 at 5K 845hp 786tq

https://ls1tech.com/forums/showthrea...&highlight=408


2nd. M6 T/A. forged 400cid, hellion cam, stage II Patriot heads (worked over LS6's) BBK intake and BBK 80mm TB, SLP exhaust, UD pulley, Ram powergrip HD. 483 HP 458 TQ. lookin forward to sprayin it. tuned my [email protected]
http://i2.photobucket.com/albums/y18...7builds020.jpg

SS M6. 402 LME motor, L92 heads, L76 intake, 239/246 .600 lift 114 lsa, Nick Williams TB, Ram powergrip HD, Stock cat back. 505 HP 477 TQ through the cutout..tuned my [email protected]
Do you have a good list of mods (like heads/cams/intakes/etc) for all the cars and LS1tech usernames? I will update page one in a few days. I just want people to PM the members if they have questions about their set ups. Thanks for sharing...if they are not members ask them to join.

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Old 12-27-2007, 08:59 AM
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Default SLP 402 Results

SLP402
L92 Heads 66cc
L76 intake & TB
Z06 MAF
Cartek 235/239 .598/.605 115.5 LSA
ARH 1 7/8 LT's
Vararam
4:10's
MN6
Corsa Touring Catback
ASP UD pulley

485rwhp/441rwtq

Bob K.

Last edited by RGKSR; 12-29-2007 at 05:52 AM.
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Old 12-27-2007, 07:53 PM
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Good numbers Bob especially with that mild cam. Good set up. Do you have a graph you can post?

Bob's Graph


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Old 01-01-2008, 09:46 AM
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updated

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Old 01-08-2008, 06:35 PM
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I like the ones that show the 1/4 ET and MPH.

10.71 @ 124.9 w/ a 1.5 60'

LS2 408
225 AFRs
11.8:1 Comp
244/248 612/615 111(+3)

And last but very important is 3700 lb race weight.

I am geared for the big shot so my 3.73's arent ideal on the 28" DR's for motor passes.
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Old 01-09-2008, 12:22 AM
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Originally Posted by 98Z28CobraKiller View Post
I like the ones that show the 1/4 ET and MPH.

10.71 @ 124.9 w/ a 1.5 60'

LS2 408
225 AFRs
11.8:1 Comp
244/248 612/615 111(+3)

And last but very important is 3700 lb race weight.

I am geared for the big shot so my 3.73's arent ideal on the 28" DR's for motor passes.
If more people posted their track times I would add that to the spread sheet but many have not. Nice times indeed for your NA set up.

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Old 01-09-2008, 07:06 PM
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Just ordered a new cam that should really improve my spray times. Hopefully wont hurt me too bad on motor. I'll post results.

Great job compiling all this data!
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Old 01-09-2008, 07:34 PM
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cobrakiller: Awesome track #'s NA!! I didn't notice your hp/tq #'s anywhere .. what are they?
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Old 01-10-2008, 11:48 AM
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Originally Posted by junior28570 View Post
cobrakiller: Awesome track #'s NA!! I didn't notice your hp/tq #'s anywhere .. what are they?
I put down 490 rwhp but the torque number is tough to see accurately due to the 5200 RPM stall converter. I think that it is in the neighborhood of 470 rwtq.
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Old 01-11-2008, 10:00 AM
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Originally Posted by Mike TexaSS View Post
This is a car we just finished yesterday.

2000 C5 Corvette
408 LS1 11.4.1 Compression HK Racing Engines
Greg Good Stage MEGA HP LS6 Heads 2.10 Valves
Custom Solid Roller Camshaft (Specs per Greg Good) around 250/260
Jessel J2k Rockers
Greg Good Ported FAST 90mm
Kooks 1 7/8 to 2" Headers
3" X-pipe
Textraila Exo Skel Dual Disc Clutch
Six Speeds Inc Stage 3 T-56 ( You da man Joe!)
DTE Stage 3 4.10 Rear End
19" HRE Wheels

MAFless Tune

This dyno is through open x-pipe. Through a B&B Triflow Catback it makes 578 RWHP!

601 RWHP 513 RWTQ SAE

Will update the graph and numbers later. This is a strong @ss car.

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Old 01-11-2008, 10:25 AM
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Originally Posted by Mike TexaSS View Post
I finished my new setup! This is my personal daily driven Corvette. It made what my old 402 did but this one is smoke free!


402 LS2 11.1 Compression-HK Racing Engines
TEA AFR 225's Flow 345cfm
249/255 .640 .640 110 LSA
Greg Good Ported Fast 90
Stock 1.7 Rockers (Sold my Jessels)
Kooks 1 7/8 Headers
3" X-pipe
Corsa Catback
Textraila Exo-Skel Dual Disc Clutch (Thanks J-ROD!!)
DTE 3.90 Rear End

Tuned with no MAF


This dyno is through cutouts with heavy *** 18x12 Z06 Wheels (70lb per wheel and tire)

541 RWHP 512 RWTQ SAE

Another great one...hope mine comes out as good.

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Old 01-15-2008, 07:18 AM
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Originally Posted by XtrmLS1spd View Post
Car made 465 RWHP and 430 RWHP on a Superflow dyno.

Mod List is as follows...

Engine:
Performance Engineering Aluminum LS2 403 (4.000 stroke/4.005 bore)
Eagle 4.000 crank
Eagle 6.125 Rods
Manley Pistons (-14cc, 4.005)
Clevite 77 Rod Bearings
Clevite 77 Main Bearings
Chromoly 7.400 Pushrods
Stock GM Lifters
PRC LS6 stage 2.5 heads, 59cc, with 2.04/1.57 valves, PRC Springs
1.8 Harland Sharp Roller Rockers
SDPC Crane Cam 250/256 .580 .580 108lsa (actual lift is .614 .614 with the 1.8 HS Rockers)
42lb Green Top Injectors
FAST 90mm Intake
Nick Williams 90mm Throttle Body
SLP 90mm MAF
LS6 Ported Oil Pump
LS2 Timing Chain
ARP Head Studs
ARP Crank Bolt
Powerbond Pulley
LS1 Motorsports Lid (Black)
K&N Air Filter
Thunder Racing Catch Can
NGK TR55’s
Taylor 10.5mm Thunderbolt plug wires
Thunder Racing Coil Relocation Brackets
Poly Motor Mounts
Metco Valve Cover Breather

Transmission:
TH350 Transmission - built with racing clutches (~5,500 miles since rebuild)
TCI 3800 stall
Deep Transmission Pan
Transmission Cooler
Lokar dipstick
Performance Shift Kit
Hurst Pistol-Grip Quarter Stick Shifter
1998 LS1 Flexplate

Exhaust:
Hooker 1 7/8 headers
3 inch y-pipe
Dual Cutouts
Flowmaster Cat-back

I would really like to see some track numbers on this one. The Superflow reads lower than a Dynojet but not as low as a Mustang Dyno, plus that TH350 and 3800stall...bet he is losing 40-60rwhp or more through that heavy trans.

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Old 02-01-2008, 06:27 AM
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Originally Posted by CamaroRick View Post
My tuner had the car on the dyno, it's not completely dialed in, but the basic numbers are in, she made 467rwhp at 5600rpm peak torque was just under 460 at 4250rpm on the mustang dyno. was told it started to get some valve float at 6300rpms dont have a graph for that one tho. clutch master took a dump, gonna rebuild it tomarrow and try to get it back to the tuner for the little adjustments

The engine is a 408 11.9:1compression iron block, ballanced, coated bearings, 249/255 .612" .620" on a 110LSA tsp cnc'd l92 heads shaved to 68cc chambers, stainless heavy valves, patriot golds, caddy lifters, molly pushrods, doubble roller timing chain, highvolume oil pump, high pressure spring, stock rocker arms, kooks 1 7/8" headers, 3" y pipe to a single 3" hooker catback.

to tell the truth i was expecting more, was looking for a "bigger cam" in the l92 setup but it looks like it may need some work. overall im happy with the first results.
-1.8cc valve reliefs, 4.030 bore 4.000 stroke, .040" head gasket, 68cc chambers ~.01" above deck; this is with the hooker catback on the ypipe. The car is an m6 10bolt, spec stage 3+ clutch, stock l76 intake manifold

https://ls1tech.com/forums/attachmen...1&d=1201744943


Nice numbers on a Mustang dyno CamaroRick...I just want to say that maybe your cam is too big for your intake/or heads? I have been reading a book on cam selection and it talks about bigger cams that need more air to produce power and if there is a restriction whether in the heads or the intake that cam will act like a smaller cam up top (peak early) and make less power/torque in the lower RPMs. Don't read this like I am bashing your set up, I think you got a killer set up, I just think there may be something holding it back from being even better. I could be completely off here...so don't take my word as gospel. I think the idea of porting the intake if you are not happy with the results (although I would be thrilled with 'em) is a good place to start. If there truly was valve float on the one pull and you can repeat it then I would replace the springs or shim them...are they close to coilbind?

Keep us up to date...when you are done with the tune.

Jon

Updated numbers 472RWHP 461 RWTQ


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Old 02-03-2008, 09:23 PM
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Originally Posted by donalr76 View Post
I went and got my car tuned at Xtreme Horsepowere in North Richland Hills on Friday. It put down 463 rwhp and 462 rwtq. I have stock induction which killed me on the big end the car stopped making power at 5800rpm. Time to invest in a Fast 90/90 or the new Weiland and I need a bigger MAF.
My car has a Texas Giant, PRC 5.3L, and full bolt ons. I would like to say thanks to Xtreme Horsepower for coming through with a great product (403 shortblock) and their Xtreme customer service. It is the best shop I have been to in the DFW. Thanks to Arvil and all the crew over there.
2002 Camaro SS Anniversary Edition Blk,M6,SLP Lid,March UD,NGK Iridiums,Pro-5.0,Moser Axles,Poly Motor Mounts,TSP True Duals w/ Spiral Flows,Umi SFC,Tubular K-Member,Adjustable LCA's and Torque Arm,Strut Tower Brace,SPEC Stage 3,Six Speeds INC. T-56,Chrome ZR1's 17x11 on 315/35 BFG DR's,New Forged Short Block,Big Cam,PRC 5.3L Stg 2.5's, Pacesetter LT's,EFI Live tuned by BrianC98Z28

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