venomws7

Hey guys !!!
I need some help here please.

EDIT The dyno graph

Couple of months ago a friend of mine dynoed his C6 ZO6 with these mods:

AR 1.7/8 Headers with Off road X-pipe.
Stock catback.
Fast 102mm Intake (unported)
NW 102mm TB.
K&N CAI.
QM550 camshaft. (great cam with stock idle and awesome drivability)
PRC LS7 Heads from TSP milled to 68cc.
Spec stg 3+ clutch and aluminum flywheel.
Tune of course.

The car made 545rwhp 510rwtq with great mid range HP/TQ





After couple of months the owner wanted another 20-30rwhp N/A and 200+shot so I talked to Trevor@TSP and since the owner didnt want the LSX Block for the weight I orederd TSP forged LS7 427ci since Trevor told it will handle the 250shot with the right tune and fuel.
I also ordered Nitrous Outlet plate system from TSP.

(BTW I recommend TSP for everyone I'm always happy when dealing with them and I'm overseas) thanks guys

He also changed the QM550 for RAGIN RACIN Lethal since we always seen great results from it.
Thanks for the fast shipping Shawn

Now for the dyno time same mods above but with stock TB and changed K&N CAI to the new Halltech Killerbee II....

The car only made 536rwhp 500rwtq N/A
Then added 103VP racing fuel for the nitrous

150shot 673rwhp 657rwtq
200shot 744rwhp 773rwtq I love the TQ

A/F Ratio is perfect at 12.8 for the N/A runs and 11.5 - 11.8 for the nitrous.


N/A




150shot




200shot



Keep in mind guys all the N/A runs were on 90-91octane pump gas and 90 - 95 F whether The nitrous numbers were great but N/A were not that good we thought with the bigger cam and better CAI the car will gain 20-30rwhp

I already ordered B&B Fusion catback and will also order LMR 102mm TB
Hoping to see 560+rwhp .

BTW Lethal cam is awesome to drive the drivability is great too...

I know the stock catback/stock TB and now maybe the Rotating Assemblies is a little heavier than LS7 but I really thought the car will be close to 560rwhp even with the stuff above


Sorry for the long thread....
PLEASE LET ME KNOW WHAT YOU GUYS THINK

Thanks in advance
Hussam.

Randy@RaginRacin

DO you have the numbers on the new block. Dished pistons, Head gasket thickness, deck height. Did you degree the cam in. I'd like to see some of the specs so we know for sure we are comparing the two setups correctly. Let me know. I want to see you making the numbers you are capable of making.

Shawn

HP ADDICT

Wow all that for 536rwhp seems nuts! Good Nitrous #s though! I just can't see adding prc heads cam and bolt ons to only make 536. Hopefully the guys at Ragin or another vendor can get this figured out. I would think you would be 560 plus easy.

venomws7

Shawn thanks for the reply..
We used the same head gasket thickness , yes we did dgre the cam.
The pistons are Wiseco -4cc flat top.

How much do you think the catback is holding the the power??





Thanks man thats what I thought.

kumar75150

I didnt pick up any noticeable hp trying a catback or the NW102mm TB on my big motor. You might get lucky but my initial suggestion would be not to waste money on those parts from a power standpoint.

Compression comes out around 11.5:1 so that shouldn't be a problem really.

Is he on stock wheels/tires? Can't really think of anything.

kumar75150

I'm going through the same thing on my car (somewhat low dyno) and I'm taking my heads off on Monday and putting them on a flow bench along with some stock ls7 heads.

venomws7

Yes stock wheels but with Hoosier R6 Stock size.
Well if the bigger motor didnt pick anything I really dont think the small one will do..





Any dyno numbers you wanna share??
Did you spray it yet?

kumar75150

No sharing

Waiting on fuel cell from Nitrous Outlet.

venomws7

You dont need a fuel cell for 50shot

FNQWK

somethings def not right. is it on a very safe nitrous tune? same dyno?,95deg? +275tq!!!!!
forged ls7(stock heads)
lethal cam
kooks
off road x
ported intake
vararam
borla stingers
texatralia oz700
540/500 n/a-(640/610tq on 100 shot nitrous)

HNK

Hussam

Great choice of cams. does the new motor have the ported/milled heads? The lethal is definitely the better choice here. Did you tune it yourself or someone did it for you? Are you in DXB?

sammyv

You say you are using stock throttle body? Is it ported?

LEAVINU

What kindof dyno?

I thought Lethal H/C LS7's were easily in the 575-580rwhp range but maybe I'm mistaken. Especially with a FAST 102mm ported or not that thing really outflows the stock mani.

I've "heard" the stock z catback can hold one back about 5-10rwhp. Corsa exhaust tend to get closer to the 10rwhp gain over stock, but again this is just what I've heard not seen or experienced.


Nitrous power sounds about right and insanely stout!
The N/A setup definitely has a bug in it somewhere.

Geared

may there is something wrong with the heads/port match of the fast???

Randy@RaginRacin

Do you know the deck height on the block. Did you degree the cam with an adjustable timing chain setup. We usually do thins when we forge a motor. Also is the car setup on a safe tune because of the nitrous. We run a Lingenfelter Controller on our nitrous systems so that timing is retarded when the nitrous is turned on. This is so we don't have to change tunes. There is something going on, but I need to know ALL of the details to help.

HNK

Shawn, you better get yourself down there . with what he has he should be more towards the 570-580. I thought it would be hotter than 80-90s now but that shouldnt take away 40hp.

6Speeder

Well, you've changed internals. Are the rods/pistons heavier than stock?
Are you using the same dyno and SAE correction? If not, you can't really judge the changes accurately. Some dyno's are more generous than others.

venomws7

I just posted the dyno graphs.
Yes same dynojet dyno and very similer whether too..

The tune is safe but not that safe since with the nitrous we added 103VP octane so the tuner didnt take a lot of timing...

Nice numbers from your car.






Thanks man.
Yes the same PRC Ported / milled LS7 heads 68cc .

My friend tuned it also name Hussam he's a pro tuned a lot of LSX Cars / Lots of 900hp import / exotic.

I'm in K.S.A Saudi Arabia.





Stock 90mm TB for the Nitrous Outlet plate...
Even if we got the 102mm TB I really can't see it gaining more than 8rwhp max...





Dynojet.
The owner is getting catback and TB if he didnt dyno 550+rwhp he'll spray 300shot

Thanks and I agree the nitrous numbers are great.





We dynoed another car with same heads / QM600 / Fast 102mm Intake / AR 1.7/8 headers / Corsa / made 578rwhp 520rwtq

I'm very sure its not the heads/port match..

Thanks.





Shawn I'll have to ask about the deck height but its reguler LS7 Block and I'll see how the cam was installed.
The tune is not safe I'm sure about that.





Thanks thats what I thought too

venomws7

Same dynojet dyno / SAE Smoothing 5 and very similer whether.

The internals is Wiseco pistons / Callies Rods / Callies Compstar crankshaft I'm sure its heavier than stock LS7 but alot of Forged LS7 with Boltons H/C have already made 580+rwhp

FNQWK

i dont think the catback & tb are holding you back,doubt you will even see 10rwhp.

take it to the track, if you dont trap 135 you def have a prob