Getting aHead...Not!

[MDSheds_SS]

http://a68.tinypic.com/24zehbd.jpg
http://a65.tinypic.com/fnts2s.jpg
It's never good when you can remove a rocker without any tools.
Tried a new set of 26" tires at the track and I bounced off the rev limiter going threw the lights. This is the end result.

[6spdg37s]

damn bro ! that sucks sorry to see... when was that ?

[sweetbmxrider]

Hoooooooooooooooooooooooooooooooooooooooooooo damn!

[Jersey Mike]

This is a first for me... congrats? Joe, you never cease to surprise :lol:

[ar0ck]

That is wild!

[MDSheds_SS]

That happened a few weeks ago at Etown test n tune, but with this heat I haven't been able to get under there and inspect the situation. After getting it off the trailer and taking off the valve cover this is what I found. Decision time.... Not sure what I will be doing next.

[3.4 grape of wrath]

Damn! Never seen that before.

[FlyingDutchman]

Wow, sweet carnage! Is that a weld below the rocker? Or just funny lighting?

[MDSheds_SS]

Looks to be a welded. These heads must have been repaired once already. They were a Craig's List special. That's what ya get for budget build projects I guess.

[IROCZman15]

i noticed that welding on it too. wheeew thats some damage!

[MDSheds_SS]

Anyone have any pros/cons with the Trick Flow GenX 215s? Trying my best to not change the cam again. Looks like my cam will work nice with those heads.

[Blackbirdws6]

Ouch. That's a new one. Good luck getting it back together.

[NJ Torque]

Definitely due to that weld job. Never seen a head break like that before.

Those TFS heads will work great on your motor.

[sweetbmxrider]

But if it was welded that means it broke before?

[The_Bishop]

Maybe when ported it broke through, and that's how it was repaired?

Either way, that sucks.

[sweetbmxrider]

Maybe when ported it broke through, and that's how it was repaired?

Either way, that sucks.

Yeah, I was thinking along those lines as well. Silly craigslist welding cast aluminum.

[NJ Torque]

Anyone have any pros/cons with the Trick Flow GenX 215s? Trying my best to not change the cam again. Looks like my cam will work nice with those heads.


Check these;


http://ls1tech.com/forums/generation-iii-internal-engine/1777231-mms-220-heads-info-pics-discussion-inside.html

:bow::bow::naughty:

[jeff wilson]

I have to ask. Did the 26's hook? If so what were they

[MDSheds_SS]

I have to ask. Did the 26's hook? If so what were they

Mickeys ET Streets.
26x10.5s
17 psi
Hooked up nicely. However the wheel moved in the tire. Almost a 1/4 inch according to the marks I made.

[MDSheds_SS]

I haven't found any DRs that don't hook. I've tried 15"and 16" MTs and Hoosiers both hook. Even hooked with 17" MTs

[jeff wilson]

Mickeys ET Streets.
26x10.5s
17 psi
Hooked up nicely. However the wheel moved in the tire. Almost a 1/4 inch according to the marks I made.

Are these the new bias tires? Or is this a radial?

[NJ Torque]

Are these the new bias tires? Or is this a radial?


I picked up a set of the Radial pro (26x8.5) and they hook great.

[MDSheds_SS]

They are bias ply but I don't think they are the new ones. They are the MT 3752 model according to the Google machine.

[jeff wilson]

They are bias ply but I don't think they are the new ones. They are the MT 3752 model according to the Google machine.

That's a good tire, I don't believe their still in production,they changed the tread on the new ones. Sorry I hijacked the hell out of your disaster. That sucks. If you only knew you could have had " JB Weld Heads "in your sig!:rofl:

[MDSheds_SS]

That's a good tire, I don't believe their still in production,they changed the tread on the new ones. Sorry I hijacked the hell out of your disaster. That sucks. If you only knew you could have had " JB Weld Heads "in your sig!:rofl:

No biggie man, and I had it coming... You get what you pay for and I didn't pay much for the " JB Weld stage 2 heads" Build Race Break repeat!

[The_Bishop]

Looking at the pictures, those heads are damn thin in the area of the rocker bosses. Like 'holy crap that's nearly see-through' thin.

[qwikz28]

I had the same thing happen to me on Stage 1 PRC LS6 heads. Only had about 3k miles on it and no runs at the track.

Switched to AI 241s and never looked back.

[MDSheds_SS]

I had the same thing happen to me on Stage 1 PRC LS6 heads. Only had about 3k miles on it and no runs at the track.

Switched to AI 241s and never looked back.

Did it come apart at high RPM or just regular driving? What size push rods were you running and were they milled at all?

[qwikz28]

Did it come apart at high RPM or just regular driving? What size push rods were you running and were they milled at all?

Cruising below 2k in 5th gear. I heard a small noise, the engine speed went nearly to redline and a lot of smoke bellowed out the back. Shop said the heads were over-ported and the deck was too thin to support the pressure. A chunk broke off and sent crap into the motor. My entire motor was toast.

7.4" pushrods, no milling. It came as a package from TSP with the cam, so you would assume they were correct. Unfortunately, I had bought the kit the year before I installed it but I hurt my shoulder and it sat on the shelf until I could install it the following year. TSP told me to take a hike when I told them since I had ordered it a year prior, even though the heads had about 3k miles on it.

Lesson learned.

Edit: FYI, this was back in 2008

[MDSheds_SS]

http://a67.tinypic.com/28cil4z.jpg
http://a68.tinypic.com/2z3pf9s.jpg

Finally taking a step in the right direction. Trick Flow CNC 215s milled to 61cc for 11:1 comp. 921 dual comp springs and yella terra 1.7 rockers
Holley Valve covers and new GM gaskets.
Just need to find Ls2/Ls3 coils and harness to finish it up.

[6spdg37s]

niceeeee

[jeff wilson]

So long J B Weld

[MDSheds_SS]

http://a65.tinypic.com/x4rtb7.jpg

Another quality job from my cousin over at Quick Strip sand blasting & powder coating.
Also got my Ls2 coils for a cleaner look.

[KirkEvil]

What head head gasket and thickness are you going to run? Guessing .051" if your coming up with 11:1 SCR?

[MDSheds_SS]

Yea GM MLS compressed is .051 according to The Google Machine. Car should be going under the knife this week. Can't wait to get this thing back on the track.

[KirkEvil]

Not to derail what you're doing, but you could easily push compression further with your combo with a thinner head gasket and also improve quench all for a nice gain. Your setup is almost identical to my old catfish

[MDSheds_SS]

Not to derail what you're doing, but you could easily push compression further with your combo with a thinner head gasket and also improve quench all for a nice gain. Your setup is almost identical to my old catfish

What gasket did you run and what was the comp ratio? Pump gas or Racegas? I'm going to Tune time on Weds to talk to Matt and get his opinion on the whole setup. I might even change the cam if he thinks there's a better cam for these heads. What cam did you run?

[KirkEvil]

What gasket did you run and what was the comp ratio? Pump gas or Racegas? I'm going to Tune time on Weds to talk to Matt and get his opinion on the whole setup. I might even change the cam if he thinks there's a better cam for these heads. What cam did you run?

Old setup:
All stock LS1 shortblock
228/232 .612/.595 111+3 cam
TEA LS6 heads, 62cc chambers, PRC .650 Doubles, LS7 lifters, YT 1.7 rockers
.040" cometics
Fast 102/102, 4" CAI
ARH 1 7/8, cutout
Stock 4L60e/ HD2 shift kit
Vig 4000 stall
Full suspension, S60 3.73, 26" tire

Dyno'd 456/420 locked at RPM, and shift points were 6500rpm. I ran 92/93 pump on the street and test and tune nights, and didnt see a difference running race gas although it smelled amazing.

Static compression isnt as important to pre detonation as the dynamic compression driven by valve events. With .006" piston to deck height on my setp this calculates 11.3:1 SCR, 8.88:1 DCR, and .034" quench. Everyone has their own opinions but the general rule for DCR I found was:

91 pump = 8.5:1
92 pump = 8.5-8.6:1
93 pump = 8.7-8.8:1

Obviously I pushed the limits a bit with my setup on both DCR and quench but I was comfortable knowing that the combustion chambers of the heads and PTD were consistent or better than most of the combos out there trying to do the same. Full disclosure, this is a lot of theoretical number punching and I did take a gamble by just installing my cam dot to dot and took the cam card numbers for truth.

Do you have the full specs on your cam? intake duration @.006, LSA, and ICL? Any chance you measured piston to deck height? If you could provide those I'll list a quick rundown of SCR/DCR vs gasket thicknesses for your setup for you to decide.

[KirkEvil]

Your Crane cam 1449601
228/232 @ .050
290/294 @ .006
112 LSA
107 ICL

Assume PTD = .006", TFS 61cc chambers, this is what I am coming up with -

.035" thk head gasket:
Quench = .029"
SCR = 11.63:1
DCR = 8.68:1

.040" thk head gasket:
Quench = .034"
SCR = 11.47:1
DCR = 8.57:1

.045" thk head gasket:
Quench = .039"
SCR = 11.32:1
DCR = 8.46:1

.051" thk head gasket:
Quench = .045"
SCR = 11.15:1
DCR = 8.34:1

I think .040" gaskets would be safe for your setup and you should have no problem running 92/93 pump. With that cam you run into piston to head clearance issues before you reach a compression limit for pump gas.

I am curious to hear what TTP recommends you do

[MDSheds_SS]

Thanks for all the info man, Still up in the air about what gasket I'm gonna use. I have the .051 in hand but that because I jumped the gun and bought those right after i got the heads. Gonna get TTP opinion and go from there.