$750 L98

iTrader: (7)

Ok this car has been down so long i'm having withdrawl problems, after all this down time i want to play the guess game to get my hopes up (blew original 350TPI, Blew rings out of built 383TPI, LQ9/LS2 conversion going in).

Specs are:
-LQ9
-LS6 intake
-LS6? manifolds
-Stage II 4L60E
-3k Stall
-CAI
-Magnaflow exhaust
-No cats

Question is, what purely speculative dyno numbers should i expect to see? I will post results and graph once the project has been completed.

$750 L98

iTrader: (7)

Is 410-420RWHP to much to ask from the setup? What's the weakness of this motor, and what mod comes next (new to these setups). Would headers help the setup with this cam? Is it worth Stage 3 heads? would a low boost magnacharger be a nice mod?

AlLtHiRdGeN

Lts would put you in the 440-460whp range through an auto, without long tubes you are leaving alot on the table.

$750 L98

iTrader: (7)

So it's fair to say I will require headers next, as manifolds are not adequate to support much flow past stock power numbers?

I am also thinking about a small dose of nitrous, does anyone have an arguement for or against a 75 shot down the road?

we_todd_did

iTrader: (97)

150-200 Shot Dont Be A Pu$$y

$750 L98

iTrader: (7)

Just be glad I'm not disillusioned enough to think i can run a 250+ shot on non-forged components!

This idea only stems from the thought of getting greedy if i ever run it at the track. If and when I install nitrous, i plan on it being a meager amount as i like all motor power anyway.

$750 L98

iTrader: (7)

Also my goal will be drivability as my priority (it is my only car). The car should be close to 500 Flywheel HP anyway - my next problem will most likely be no traction lol

$750 L98

iTrader: (7)

OK the car put down 285RWHP/360RWTQ Unlocked.

End mods are:
-LS1 manifolds
-LS6 intake
-LQ9 block
-317 heads
-comp 921 springs/retainers
-XER281HR 232/234 cam
-stock Y pipe
-Dynomax muffler
-Stage 3 4L60E
-3.73 rear
-2800 Stall
-22* timing
-Tuned
-13.2 AFR

what do you guys think of these number? They seem a bit low, but we think it may be due to the restrictive nature of the manifolds and y pipe.

Assman

iTrader: (2)

Definatly need to loose the stock manifolds but still that sounds low. That would be low for a stock cam let alone that cam.

Mike@HSW

iTrader: (6)

throw a 150 shot at it!!!

12secSS

iTrader: (30)

Wow, that is very low! I have a similar setup, although with a smaller cam and an LQ4 and look at the numbers in my sig. You need to get long tubes to free up the exhaust. The headers aren't the only issue with you dyno results, there is something else wrong.

$750 L98

iTrader: (7)

I know this thing dyno'd worse than a stock LS1 - It feels strong, but I don't see it lasting long.

They are telling me headers will allow more timing, but I am missing nearly 100RWHP....I don't think headers and a new tune will accomodate that kind of power. Maybe i should give up on this thing and find something that puts down proven times and power?

It's really odd that this cam won't even spit out stock ls1 numbers:

XER281HR
232/234 .595/.598
113+3 LSA
With Comp 921 springs and retainers...


Anyone have a clue what could be going on with it?

$750 L98

iTrader: (7)

I'm still baffled as to why this car is down on power, a stock LQ9 dynos those numbers doesn't it? I don't understand why it's so hard for this cam to produce 60-70RWHP more than what it has, I'm watching build ups and stock manifold cammed builds. 380RWHP seems to be close to max on stock manifolds.

Now I'm not even sure if it sounds like it has a cam in it...

Any thoughts?

lowbirdws6

iTrader: (62)

What is your compression ratio? How many c/cc's per chambers? The reason I ask is that I put hogged out, ported ls6 heads set for turbo applications on my LS1. The bowls were opened from 64 cc to 72 cc, compression dropped to 9.7.1. I lost a few ponies due to compression loss. My aim was to lower compression (even though not quite as much as I would have liked) because my new APS twin turbo kit goes on next week. Hope this helps in your quest for enlightenment. Good Luck! Marv

black_z

iTrader: (4)

Do you have the graph? If not, where does power start to fall off? Have you done a compression/leakdown test?

BES Stroked Nova

iTrader: (24)

needs more timing, say bye to stock mani's and spend 1k on a set of headers... I am trying to talk my buddy into it also...

Rameaux

Yea, I don't want to be captian obvious, but something is definitely wrong when those numbers are coming up...I agree with the compression/leak down test, could be timing too.

ZV8

iTrader: (2)

its making good torque, what RPM did you stop at on the dyno? I would check valvetrain parts

litle88

iTrader: (20)

I think its the compression ratio. he is using the 317 heads and everything is stock OE parts.
what gaskets are you using?
what pistons are you using?
+1 for the Longtubes!
goodluck

Crowder

iTrader: (6)

what dyno was this on, it sounds to me that it might have been on a dyno dynamics which reads true WHP numbers