Carbureted LSX forum - :-) just home from the engine dyno.....

:-) just home from the engine dyno.....
not too shabby for a JUNKYARD DOG
30Kmile LY6
850 Mighty Demon on a 1" open spacer, on a L92 VIC Jr
Edelbrock 1 3/4"-1 7/8" headers
head cut for 11.0:1 compression
OEM pistons flycut .070"
Bret Bauer spec'd cam and valvesprings, pushrods
oem lifters
93 octane pump gas
31* timing, verified with a pinned ATI damper and timing light
12.8 A/F
I think I need to put in a rollcage soon.......
http://i971.photobucket.com/albums/ae191/3pedals/SCN_0001.jpg

7500 rpm? Didn't think anyone took stockers that far.

I had to DL your chart and do a gamma correction in order to read it, but wow! What cam specs? That was still making gains at 7500!

Ya the ink was kinda weak, and it didnt scan too well.
Bret Bauer custom spec 236/262 @ .050, 110LSA, .6xx/.624" he did not want me sharing intake lift, call him and get him to cut you 1.
we puled it up to 7800 on 1 pull, but it fell off hard after 7700.

No cam bolts? Cannot remember, pretty crazy, never thought a all motor cathedral would mind that rpm without serious springs, ect.

Square port motor- who says L92 heads don't make power? Lol
Has PAC Dual springs 160 seat, 400 open

Thats freekin nuts man. Congrats. Eric L

holy cow!!!. nice numbers.

26* of split on duration. i thought 16* on my 235/251 cam was alot.

whats been done to heads besides mill?

my combo is very similar. im hoping for 600 at the crank.

i wanna hear this thing got any vids?

that's awesome, well done. gotta stop telling people about these ly6's. gonna be raising the price by the time i get home and need to buy one, haha.

how much did you cut off the heads to raise 1.5pts of compression? what thickness headgaskets?

mike

Holy Cow! 7500 RPM!

That thing is making serious power. You might make 1 low 10 second passes before they show you the door. :D:devil:

648/526 Holy shit :cool: unreal :D

You needed a rollbar before....now a cage :nod:

Guesstimate 10.16 @ 135 in decent air,with perfect launch/shifts.

Now get it in the Camaro so we can hear her :)

thanks for the congrats guys
.050" cut from heads, .040" 4" bore cometic gaskets to get it to 11:1
- no real porting, I just smoothed out a couple rough spots, kinda made it look pretty, probably acounts for a bunch of mental hp, but no real hp, lol. I did remove the injector bosses from the ports of the intake manifold runners, they are fairly big. Port alignment was good did not need to mess with it.
I'm Lovin theese little motors

Wow man! Impressive results. Have you done or considered the trunion upgrade on the rockers?

You are going to be spinning that thing with that power curve. I would hate to hear about an engine failure due to a rocker eating itself.

wow that a lot of power1! Can't wait to see your et at the track!!! 7500RPM wow thats alot of RPM!!!!

I guess seeing you are in Manitoba you have some time before the track opens! I have family in Steinbach ... amazing farmers sausage and ham.

Bruce

Got any videos? I wanna hear this thing

I know they are tall, but I bet that motor would pic up significantly with a Mast or All Pro intake.

ya I think your right, but I definately cant afford 1 of those nice mast 2pc intakes.
this entire engine setup is as low buck as possible

Those intakes are crazy expensive and they are tunnel ram tall.

Do you have good axles and drive shaft loop?

you bet, Dana 60, 35 spline moser axles, spool, and a loop. Gotta build it tough when you run a stickshift, lol

Wow. Dana 60. This is serious business here! That car must be an absolute blast to drive.

I love the mechanical violence of the stickshift, and its just too much fun rowing my own gears down the strip. This season should be a blast with the new engine setup, and the race Nash 5spd, it will be nice to flat foot powershift this thing and not worry about missing a gear. It is just gonna be tough to let out after the 1/8th untill I get a bar in it.

I have always loved stick shifts, but I have never had one set up to take a full out thrashing. I would love to drive one that is. I has to be maximum fun.

Good power, local buddy made similar out of a 6.0L with some touched up heads, then we sprayed a lot at it. Wow what a ride! Ports on the L92 vic jr are large just like the super vic for cathedral ports, its nothing like the cathedral vic jr. Should move out nicely, can't wait to hear ET and mph

wow...awesome job!

Thats some crazy power NA, Your going to be sraping that rear bumper from 5000rpm dumps with a Nash in it. Thats going to be a real hoot on the street too:nod:

How Mmuch and what tool did you flycut?

Cut .070", and beleive it or not I used adhesive backed 180 grit sandpaper cut into circles, stuck to the intake valve. Then an 8mm collet to set the depth..... Low buck

Apparently the engine does not know it is low buck.:D

Lol, let's hope it doesn't find out either

Man, that is just awesome! Just like the others.......can't wait to see some times from the track! Great job!

On a drill or bu hand? Great idea.

Congrats man, Makes me super anxious to get my motor in the car since we have a similar setup other than the cams. Do you think you would gain anything with a bigger carb?

These dyno results have me TOTALLY geeked to get my shit together. Cause my combo is REAL close to Barrets. AGAIN, and AGAIN, GREAT results Barret. Thanks for posting the results. Eric L

Honestly, am I am pumped too, it's about 50hp more than I expected

When are u strapping in that engine bay? I want some chassis #s. Should make 550ish at the wheels with that stick behind it. Great job !:hail:

Im willing to bet that Barret wont chassis dyno it, he will just head straight to the track. Eric L

Im willing to bet that Barret wont chassis dyno it, he will just head straight to the track. Eric L

And he'll be changing that tagline under his name to "10 second club" :hail:

And he'll be changing that tagline under his name to "10 second club" :hail:
yep, strait to the track. then strait to the chassis shop for a cage, lol

yep, strait to the track. then strait to the chassis shop for a cage, lolMay even need some wheelie bars :eek2:

How close are we to a track date ?

I'm jonesin' to see times :D

I think you should consider some detail work on the underside of your camaro. People will be seeing alot more of it.LOL.:drive:

How close are we to a track date ?

I'm jonesin' to see times :D

Aprox May 20 is the opening weekend at my local track, just got another 2" of snow last night...........:bang:
Long wait, but I still have to get the engine back into the car, and cut a nasty hole in the floor for the Long inline shifter, and build a new crossmember for the Nash 5spd. Its looking like I need a new driveshaft as well, the new trans is 3/4" shorter than the Tremec, and I cant move the engine back any further.
When I do get to the track, I plan to test and tune it through the 1/8th, and when I get the chassis dialed in I will run it out the back door, but I am pretty certain that I'll only get 1 shot at that, lol
Barrett

Just out of curiosity, what was the chamber size after cutting? And how far does you piston stick out of the hole? And do you know how many CC flycutting the piston head added. My motor ended up being .006 out of the hole, and 7-8 cc piston dish before flycutting. Thanks, Eric L

chambers ended up about 62cc's. I did not measure the valve releifs, it would have been difficult with the dished pistons - the releifs ended up being .070" deep from the highest part of the piston to the lowest part of the flycut.
I didnt write down the dimension of how far out the pistons were, but I remember it being about .007-.008"
edit 62cc

You cut .050 off the head correct? I would have figured that would put the chamber size at around 60 cc, assuming a 68-69 factory chamber. What were your chambers before cutting. Thanks, Eric L

Oh yeah, and what valve springs are you using by chance. And what spring pressures are they set up at. Sorry for all the questions, lol. Im full of em. Eric L

yes .050" cut. I edited the above post, they were +/- 62cc's, not 63cc's
PAC 1521's on intake set up .050" from coil bind
PAC 1221's on exhaust set up .050" from coil bind

Start up vids or get banned lol..i wanna hear this baby

That is very strong output power from a 6.0 liter engine. It is even stronger than the 427ci LS7.

It is a learing for me that his type of cam make power with that duration.

Indeed, L92 head do have serious power if cam properly.

Keep us posted...

killer numbers man. it was overgeared before...with this much power and the nash its going to be totally overgeared. i have 3.73's and a sk built richmond 4+1 and even with 28's i think i maybe able to get away with 3.55's

if it weighs what mine does and you can get it to 60' that thing should go well into the 9's

put it this way, first pass off the trailer i went enough mph for a 10.60 or .50 totally untuned. 60's wasnt great due to rear shocks having zero control over lift. it almost pulled the back tires off the ground too when the suspension topped out lol.

good luck man and keep us posted!

awesome numbers man, congrats!!!!!

this has me very excited to get my build together! ls2 bottom end w, mahle pistons w/ valve reliefs. ls3 top end with LG g6x3 on a 109. i am cutting my ls3 heads .050 also and did u have any issues with the intake lining up?

once again man congrats!

killer numbers man. it was overgeared before...with this much power and the nash its going to be totally overgeared. i have 3.73's and a sk built richmond 4+1 and even with 28's i think i maybe able to get away with 3.55's

if it weighs what mine does and you can get it to 60' that thing should go well into the 9's

put it this way, first pass off the trailer i went enough mph for a 10.60 or .50 totally untuned. 60's wasnt great due to rear shocks having zero control over lift. it almost pulled the back tires off the ground too when the suspension topped out lol.

good luck man and keep us posted!
thanks, I actually only expect mid 10's once sorted out.
As far as the gear, time will tell, lol! I actually think I might put 3.54's in the Dana60 and run it through the lights in 4th.
There were no issues with the VicJr L92 lining up. I expected some bolt miss alignment, but it only needed very minor port matching.

Very Nice!

So any track numbers?

So any track numbers?

He started another thread about the track day.

10.9's in the 130-133 range, spinning...........I think he said ?

Sorry , I should have posted the first outing results back in this post,
It ran 10.91 @ 130 with a spinning 1.79 60ft.
Car is waiting for cage install. I am usually the DIY low buck kinda guy, but I am having a reputable chassis shop install a 8 point moly cage, probably won't have it back to the track untill July. I am VERY excited to run it again.

This is sick. Glad to see a fast stick shift car with a budget setup.

Thanks dude!

Not easy making that power stick just right with a manual trans, a challenge!

Everything is looking good. Congrats! I had a similar setup (HP wise) in my other Coupe so you should expect better times when you get it all sorted out.

My car was a auto with 3.73 gears and I was running 9.80's @ 139 before I pulled it and went turbo with that car.
Here is a video: http://www.youtube.com/watch?v=6m7bWYi8bf4&feature=channel&list=UL

I thought I'd update this thread as I had some problems, and I don't want other people to have this happen as well.
My Valve tips are wearing, and intake rockers are wearing as well.
This is definately caused by running (well) over .625" lift, and flirting with 400+lbs open spring pressure.
DO NOT RUN IN EXCESS OF THIS if you want your setup to live.
Lash caps,correcting rocker geometry(for lash caps) and/or a cam with less intake lift should solve my problem.

PS the stock rotating assy has survived 40-50 passes shifting at 78-8100 every time!

wouldn't roller tip rockers solve a lot of this?

jesels would help

PS the stock rotating assy has survived 40-50 passes shifting at 78-8100 every time!

No rod bolts or anything? Wow thats awesome

I figure 320 lbs open would be ok. Maybe 350 and .620 lift. You exceeded that by afar.

I thought I'd update this thread as I had some problems, and I don't want other people to have this happen as well.
My Valve tips are wearing, and intake rockers are wearing as well.
This is definately caused by running over .625" lift, and flirting with 400+lbs open spring pressure.
DO NOT RUN IN EXCESS OF THIS if you want your setup to live.
Lash caps, and a cam with less intake lift should solve my problem.

PS the stock rotating assy has survived 40-50 passes shifting at 78-8100 every time!

Have you been running a ZINC enriched oil or even just an additive?

I remember you posting you had 2 different PAC springs. The smaller of which is only 405 lbs open I believe. How do the exhaust valves and rocker tips look?

No rod bolts or anything? Wow thats awesome

He has a later model 6.0 LY6 so he has the larger floating rods stock. He also stated in a earlier post he has the ARP rod bolts.

Valve springs are shimmed to .050" from coil bind at Max lift which has brought the full open pressure above 400lbs by alot.
PAC 1521 intake springs
PAC 1221 exhaust springs
Exhaust rockers are fine, valve tips have almost no wear, but there is some. Exhaust lobe has only .62somefhing lift
I did install ARP 2000 rod bolts - probably un necessary.

What were you referring to about adjusting valvetrain geometry for lash caps? Ive also given thought to shimming the rockers but am not really sure how to go about it? Any insite? Eric L

Well, oem rocker geometry is good for cams up to .620ish lift. Once you use a lobe with more than that, the wear pattern on the tip of the valve will be too close to the exhaust side, and the rocker will be contacting on or close to the tip = bad.
The rocker fulcrum needs to be lowered to fix this. Using lash caps will do the same thing, without having to machine the stands. Then just shim the rocker stands up till the swipe pattern is centered.
Edit: too bad I learned this after the fact.

Ok, thanks for the clarification. Im around .617 lift so I should be alright, but i will have to check the wipe pattern after I pressurize the lifters. Thanks again, Eric L

That was my error, don't trust the hydro lifter, even when pumped up. Use a dial indicator on the tip of the rocker, with a checking spring in place. Then just cycle the rocker to the max lift of the cam, and check your pattern .

That was my error, don't trust the hydro lifter, even when pumped up. Use a dial indicator on the tip of the rocker, with a checking spring in place. Then just cycle the rocker to the max lift of the cam, and check your pattern .

I get what your saying. Our high spring pressure overcoves the oil pressure in the lifter, therefore skewing the results. Eric L

This is the first time Ive heard of this kind of problem on LS1Tech. I did read an article in GM HiTech that stated going over around .575 on valve lift could create enough side pressure on the valve tips to wear the valve guides out prematurely ,but until now that was the only concern I had heard.
I even asked a tech at Compcams about it before I ordered my 607-621 lift LSR cam, and they said they had never heard of a problem like this, but if I was worried about it, a set of Jessel shaft rockers should ease my mind (and empty my billfold,LOL). I havent looked at my rockers or valve tips. Looks like maybe I should.