rem308winvtr

iTrader: (24)

so go hit the track now and show us some numbers

Tony Mamo @ AFR

iTrader: (13)

I love the controversy.....and surely expected it at this level of power.

I think a better way to view this is what have other G-8's (ideally) or any other LS3 combo's with an automatic trans put to the ground with a cam of similar size to Patrick's.....be it stock L92's....ported 92's etc. Whats the cross section of data look like?

In speaking with Pat today, he shared that he has quite a bit of data (off the same dyno mind you) suggesting the better of those numbers would be 40-50 lower. He said the best he had seen on that dyno has was a max effort type build with ported L92 heads and a more aggressive cam that made 465 - 470 on the same dyno his just rolled 504 and I sense that number goes higher with a 102 TB on it (the car that rolled the big number had a very optimized no restriction 102 mm inlet....no MAF, etc.).

Lets also not forget a slightly larger cam would have still been pretty streetable (not as stealth obviously) but may have punched an easy 10+ more RWHP.

There is lots of L92 data out there in 6.0 liter combinations.....lets look for similar builds but it doesnt take a rocket scientist to figure out this combo performed better than all of us would have guessed heading into the test and we have the luxury of getting the results from a source we trust who has a ton of data on the very same dyno both with this car and many others for comparitive purposes.

Also....lets forget about the WOT gains.....Im still waiting for Pat's SOTP impressions because I know a smaller more efficient cathedral set-up will feel 40 CID larger at low RPM part throttle and that was another major perk to Pat making the move. Note that neither one of us was looking for "hero" peak numbers.....we hoped for solid results in power and a really crisp delivery of all that power, especially in the lower RPM's where a daily driver type hot rod would benefit (a benefit/perk that can be appreciated every day without even getting close to WOT).

-Tony

PS....Im also looking forward to some data that backs the dyno in the form of trap speeds.....While I have no doubt it will be there, nothing like a time slip to dismiss all doubt.

ramairroughneck

iTrader: (35)

Hey Pat, what converter are you running? I have wondered just how little stall would be needed for the street, on combo such as this (given the ultra low A6 gearing).

ExceSSive

iTrader: (13)

What would you expect a G8 with 500rwhp to trap though??? What does it weigh? Stock gearing? Stall? What were the previous track times? I am just curious. I know if it trapped 130, that is awesome but I am thinking it will be more like 121mph or so (obviously not know any of the above variables)? What are your thoughts?

bozzhawg

Yes sir, this will be the the nail in the coffin...... ET

98Aggie

iTrader: (19)

at 4000lbs it should run mid 11's at 117

Tony Mamo @ AFR

iTrader: (13)

REALLY??

Your looking for ET to validate horsepower?

I can only hope your kidding....



Kurt,

I bet Pats car runs closer to 120 with this much power even at a 4000 lb. raceweight.

Close to sea level on a cool night I wouldn't be surprised to see low 120's.

The question once again are what are the other similar cars running....heavy full weight GTO's, G8's, etc. Alot of guys do weight reduction mods though and aren't forthcoming about it.

It would have been nice to have data with the original combo that made almost 400 to the ground....speculating the current performance potential would have been alot easier having that as a baseline.

-Tony

PS....Got buried at work today....will ring you back manana!

bozzhawg

No I will be looking at MPH as well, but I don't race dyno's and not a dyno chaser, the only true validation is take it to the track...... More time should be spent at the track vs the dyno anyway...... And NO I am not kidding, get your cars off the dynos and run them at the track....period..... that will squash the haters ,doubters...... Since you want to be technical , show me the MPH first then the ET.... Is that better for ya....lol..... Because Malcom with his 6.0/ L92 headed 4000LB GM head you seem to villianized knocked down 11.22, pretty amazing at.... trapping at 120.57 MPH but his dyno was only 450HP..... We have seen 3Pedals with L92's low comp trap 121...... and I can go on some have trapped 125-130MPH..... But when and if, this combo traps 125-130+MPH then Holla back..... it should at minnium do 120MPH+..... no web hp/trap calculator guessing allowed.... And I will give you your props

If ya not trappn, squash the yappn .....lol just jiven with ya playing the dozens....

..............

Tony Mamo @ AFR

iTrader: (13)

Aahhhhh.....Big sigh

Where's the sad faced head shaking icon when you need it?....LOL

Gman's car trapped 112 at 395 to the ground....(just heard thru the PM grapevine....Pat can confirm or deny). If he picks up close to 8 MPH (in a 4000 lb ride) and tickles with a 120 trap with the new combo we deserve our "props".

Lets get real....

-Tony

383vert

iTrader: (4)

The outcome is awesome... But $ for $ is the swap werth it?
Just wondering... I just got my bare Ls3's to get started on the 6.0 iron block build I've had in mind... Thro my a bone! lol

chevynation

iTrader: (8)

Haha. Tony, I'm guessing you're referring to the million different variables that can affect ET/mph, ie: weather, DA, track conditions, tires, etc. vs a dyno where conditions are more controlled and fewer variables.

On a different note, I always thought there was some kinda voodoo magic going on with the square ports since nobody ever mentions slower throttle response/low end in their threads.. until now that is. I mean 260cc's just seems so big for anything under 400 cubes.

Pat, any particular reason you went with the LSL lobes over the EPS?

Patrick G

iTrader: (14)

Actually, my race weight was 4200 lbs when I ran 12.65 and 12.66 between 110.5-111.70 mph. Density altitude was around 1000ft. If I can race at around the same DA, I will most likely be around 119mph with the power I'm making now. It's tough getting all this metal moving, but it gathers speed nicely once it's rolling. As soon as I can score some track tires, I'll go to the track. Sadly, the nice track is 3 hours away from me so it's hard to go there as often as I like.

G8-4-speed

iTrader: (1)

WOw.....thats impressive. I wish I had the R&D to compare and do more cam experiments with my l92 stuff. After see those numbers, I don't even want to waste my time anymore. If this junk would get even close to what the 230v2 is doing, I would wet myself. Agrre'd, the 260 CC ports are a bit huge for the 6.0. Just ported a set and only did the short turn to pick up my intake flow numbers as anything else seemed to hurt them. Its hard to believe some of the flow numbers these CNC'd heads flow using the same casting's. Without starting from scratch, these intake ports don't respond well to any more cc's. My new cam ended up with more split than should be used with the exhaust flow but it may work ok since it is still dealing with the large sluggish intake ports. Cam is 221/233 .608/.608 111 ICL, 111 LCA. Compression is 11.17 milling .035 off. Don't ask what the PTV clearance is....its at 111 ICL for a reason. I may go with a single pattern 227/227 .651/.651 on 114 later but it will need eyebrows for it to fit. Also replaced the standard collector with a 2 3/8 merge collector on my 1 7/8 Kooks to see how or if it responds to the combo. Only downside is there are too many changes at once to know how much each is worth but there are plenty of comparisons to get an idea.

Pat, those are some great numbers on that G8 of yours. I can only hope to get mine close to that someday. We'll see soon enough what numbers it puts down. Get your beast to the track and lets see what it can do.

G8-4-speed

iTrader: (1)

Just start soaking those stock spinners with some "Hot Lap", it should soften them up enough for a few quick trips down the 1/4. $40 is cheeper and easier than messing with another set of tires. I have seen two sets of stock radials go 1.80's using this junk. One was a manual GXP and my auto. 1.80's should be good enough for your stock converter. Just need a decent track prep.

bozzhawg

I have never in all of my years heard a guy say, he rather dyno his car vs running it at the track to see real power...... WOW.... I guess I am getting old...... Dyno over track now?

No sir, scientific terms, on a dyno more conditions are controlled and controlled variables can be manipulated to a certain outcome.... Independant varibales are independent of control... In every scientic experiement which what a dyno is, you have controlled and independent varibles......

Well these heads come factory in Escalades, now Silverados, that need grunt and torque right? But myths have said the 260cc port is too large right?
Works fine in the vette and camaro.....

364 and 376 pulling trailers, and all that other commercial stuff, you ve seen it before, where the dude pulls up in a Silverado and pulls the the SS tanker to the dock in the commercial..... just kidding....

TXZ28LS1

iTrader: (5)

damn!! very nice Pat!!

minytrker

iTrader: (13)

Very impressive. I wish my G8 had your mods. I know of a certain motor with L92 heads that made good power through an auto

SS DNA

iTrader: (7)

Wow those numbers are amazing! Hows the driveability ?

8ByGoat

iTrader: (2)

In NO way am I doubting the #'s. And once again please don't take my skepticism as disrespect. I am only in here because after the first of the year I was thinking about replacing my top end and if this is truly a viable option I am all ears

What I am doubting is how much the AFR heads and FAST 102 are worth over the L92/LS3 heads and ported L76/LS3 intake when comparing "cammed" cars.

Doing "ricer math" if I interpreted Pat's post right it is worth somewhere in the neighborhood of 60-65rwhp. So the point blank question to you and Pat both is, if I did the swap and kept my current cam, would you say my car would also make over 500rwhp?

ChucksZ06

iTrader: (9)

I doubt it.