NA Package

[Gelf VXR]

Is anyone doing an NA package yet, from what I've read I wouldn't mind seeing


L92 stock heads
Matched headers
L92 head gaskets
Off set inlet rockers
L76 intake manifold

cam - not sure about - Ringram?


Of course you can plan to add FI later

[Afroman]

With a mild cam that will put you around 460-470 hp at the wheels. My buddy has the same setup, on his 06 LS2 GTO with the M6.

[Gelf VXR]

Afroman said:

With a mild cam that will put you around 460-470 hp at the wheels. My buddy has the same setup, on his 06 LS2 GTO with the M6.

From 303rwhp to 460rwhp N/A, cant be bad..

[ringram]

Dont forget US dyno numbers are around 10% more.
Cam selection is an art Which I dont profess to have.
Best to speak to those who make good L92 cams, like LGM, GMM (Oz) etc
You want quite differnt valve events and normally a large split in duration with a wider LSA.

I know Roger has fitted some L92 heads to a stroker so Im sure they can do the install.
Camwise, Id speak to one of the above shops who have proven results with those heads.

[Afroman]

ringram said:

Dont forget US dyno numbers are around 10% more.
Cam selection is an art Which I dont profess to have.
Best to speak to those who make good L92 cams, like LGM, GMM (Oz) etc
You want quite differnt valve events and normally a large split in duration with a wider LSA.

I know Roger has fitted some L92 heads to a stroker so Im sure they can do the install.
Camwise, Id speak to one of the above shops who have proven results with those heads.

No, that particular car made 503rwhp at another dyno, and it was after it rained. A crappy dyno with idiots running it.

[ringram]

Mate do some research US dyno's read higher unless its a mustang dyno or similar. No point disputing facts. Im not saying that it didn't hit those numbers, just that it will get different numbers on the dynodynamics stuff used here and in oz. So Gelf needs to bear that in mind.

[Gelf VXR]

Gelf VXR said:

Is anyone doing an NA package yet, from what I've read I wouldn't mind seeing


L92 stock heads
Matched headers
L92 head gaskets
Off set inlet rockers
L76 intake manifold

cam - not sure about - Ringram?


Of course you can plan to add FI later

Are these parts available of the shelf in the UK, or are they import as I suspect?

[ringram]

Try that gm parts direct website uk. Prices looked good in ukp from the clutch thread.

If not sdpcparts.com ships to uk and is a gm parts dealer

[Gelf VXR]

ringram said:

Try that gm parts direct website uk. Prices looked good in ukp from the clutch thread.

If not sdpcparts.com ships to uk and is a gm parts dealer

Neither of these turn up any usable results in search?

[stevieturbo]

Also try Ron @ Vengeance Racing. They offer lots of head/cam packages too ( in the US of course, but very good service )

Edited by stevieturbo on Tuesday 15th July 11:11

[ringram]

Not sure how you are searching mate

http://www.sdparts.com/product/SD8760/CylinderHead...

http://www.sdparts.com/product/12590124/IntakeMani...

[P15TON]

ringram said:

Mate do some research US dyno's read higher unless its a mustang dyno or similar. No point disputing facts. Im not saying that it didn't hit those numbers, just that it will get different numbers on the dynodynamics stuff used here and in oz. So Gelf needs to bear that in mind.

Are you saying Americans might 'bend the truth' about the horsepower outputs of their engines...?
Heaven forbid.

[Gelf VXR]

ringram said:

Not sure how you are searching mate

http://www.sdparts.com/product/SD8760/CylinderHead...

http://www.sdparts.com/product/12590124/IntakeMani...

Your spelling perhaps?sdpcparts.com LOL

Thanks thou

Edited by Gelf VXR on Tuesday 15th July 12:58

[Gelf VXR]

I was only reading this earlier today and had already visited their site

http://www.carcraft.com/techarticles/ccrp_0705_che...

[ringram]

Gelf VXR said:

Your spelling perhaps?sdpcparts.com LOL

Thanks thou

Perhaps

[stevieturbo]

P15TON said:

ringram said:

Mate do some research US dyno's read higher unless its a mustang dyno or similar. No point disputing facts. Im not saying that it didn't hit those numbers, just that it will get different numbers on the dynodynamics stuff used here and in oz. So Gelf needs to bear that in mind.

Are you saying Americans might 'bend the truth' about the horsepower outputs of their engines...?
Heaven forbid.

They dont bend the truth...their dynos just read high !


Not that much different to a lot of UK tuners too though. Not all dynos read the same, for a variety of reasons....some may be down to quality of dyno, others are down to the operator.

And of course whether the bonnet is up or down LOL....

The dyno topic has been done to death here. Power graphs are only a bit of fun IMO, its on the road or track that matters.

Edited by stevieturbo on Tuesday 15th July 13:12

[Gelf VXR]

Are rocker covers required? or will the LS2 FIT??

[ringram]

P15TON said:

ringram said:

Mate do some research US dyno's read higher unless its a mustang dyno or similar. No point disputing facts. Im not saying that it didn't hit those numbers, just that it will get different numbers on the dynodynamics stuff used here and in oz. So Gelf needs to bear that in mind.

Are you saying Americans might 'bend the truth' about the horsepower outputs of their engines...?
Heaven forbid.

Nope just that the Dyno's work differently. Here is come blokes comments re: Mustang dyno

"Mustang is a true measure of torque.
DynoJets read whp and use engine rpm to calculate torque. Teh dynojet has no way of simulating vehicle load at speed. When you get the rollers rolling, it takes no more hp from the car to keep it there. The Mustang Dyno had the ability to artificially load the rollers to simulate car weight at speed, more closely representative of what is take to keep a XXXXlb car moving at speed.
Both have correction factors but Mustang (or any load dyno) should give a better real world reading. Once you are tuned on a Mustang, there is little chance of it running leaner on the street then on the dyno like a DynoJet. Load dynos also run sweep tests in steady state mode which is a much slower and easier to read test. And they have more plot points and are a true measure of trq.
I asked the same questions and came to the conclusion that the Mustang was the way to go to tune to my 100 map fuel grid. If you're tuning an SAFC with 10 grid map it prob doesn't matter as much.
I was told on this board that the Mustang probably wasn't programmed properly by the authorized TEC, Motec, AEM and Hondata certified tech that owns the place and that is the difference in numbers.
I have searched teh net time again for Mustang vs DynoJet and have never found the DynoJet to read lower numbers. Try it."

This guy did a back to back between the intertia and load types (Dynojet vs DynoDymanics)

http://forums.nasioc.com/forums/showpost.php?s=0fc...

"What was the test setup? Of course with my luck, the fan ATP used to cool the TMIC broke. Oh well, to be consistent NO fan was used to cool the TMIC at Vishnu's either. I've also seen some posts about the fans used to cool the radiators ... let me tell you that the one at Vishnu's was massively stronger that the one at ATP (so we pulled it a lot farther away that the one used at ATP). I don't think this makes too much of a difference, since the engine coolant temps stayed the same. For those anal people ... ATP was 60deg.F and Vishnu was 61deg.F and I don't think there is more than a 100' of elevation change. I did forget to measure the temperature of the intercoolers (but oh well). The car were driven to their each location, sat around for 20 minutes, driven onto the dyno, sat around for another 10 minutes and then first two runs were pulled and printed. That's all folks ... we don't want to make this more complicated that it needs to be.

The Results:
[b]ATP (Dynojet) - 275.8whp and 232.2 torque
Vishnu (DynoDynamics) - 224.7whp and 192.2 torque

So depending on how you look at it ... Dynojet runs 22.74% higher than a DynoDynamic or DynoDynamic runs 18.53% lower than a Dynojet (with regards to whp).[/b] Check out these graphs ... (oops ... I can't figure out how to get multiple attachments with a single post)"

Thats exactly why there is no point everyone comparing numbers unless they are on the same Dyno. (Preferably same day)
Vixpy1's Dyno results are posted in another thread (Well except for Stevie) so it makes sense to use those results as a comparison. He has a dyno day next month so best thing is for guys to get their car there

So when someone tells me on a Dynojet they get 500bhp, well... because Im used to dynodynamics numbers (UK & OZ) it means nothing. Also rear wheel numbers are better. Any Oz and US ratings are always RW.

[Gelf VXR]

L92 Conversion, will only fit LS2 6.0

Shopping list and prices so far, correct me if I have anything incorrect?

Prices from http://www.sdparts.com/catalogsdparts.aspx


Option 1

2 x GM L92 Fully Assembled Cylinder Head $798.50
1 x GM LS6 Valve Spring Set, 16 $56.95

Option 2

2 x L92 Upgrade Head, .600" lift $999.94

Option 3

2 x Cylinder Head, L92 CNC Ported, Stock Valves, 0.600" Lift Springs $1,299.50


Required for all 3

LS2 rocker covers will fit the L92 Heads

2 x Head Gasket, Composition Type, 4.166 in. Bore, .041 in. Compressed Thickness, Chevy Small Block $53.00

1 x Intake Manifold, L76 / L92 Car, Bare Manifold $224.75
Stock LS2 TB and fuel rail will fit directly to Bare manifold

8 x L92 Rocker Arm - Intake $92.24
8 x L92 Exhaust Valve Rocker Arm $93.20
8 x L92 Rocker Arm Support $60.56
8 x LS Rocker Arm Bolt $34.40



Matching headers - part no ??

232/236 @ .050, .600 lift on a 112 lsa cam

Edited by Gelf VXR on Wednesday 16th July 08:15

[ringram]

I think you need 16 bolts not 8

Also if the rocker support is anything like the LS2 then you only need 2. Its like a steel plate that sits in the head.

Now possibly you can reuse your LS2 bolts and supports, but you will need to check part numbers.

Personally Id get go for better springs than that. Maybe the uprated to 0.650 lift (To go with the cam you forgot to mention!)
What about intake gaskets? x8?

Plus check the head gasket is for GenIV engine not SBC.