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Was told 2.8 is avg... We all know ls7 heads are better. Did both pair. I can see a Bigger bore wanting more Area. My Ls7 heads may flow more with a smaller port but the Area of the Ls3" would be considered Help @ 468 cubes
Both milled to 62cc. Darin and a cleaned up 250 cc to Factory sized 270 cc runners for a small bore.
Only in GM’s offering. The aftermarket LS7 stuff is great, but honestly anything that’s borderline or in the race category, will need freshened much more often than a run-of-the-mill cylinder head. GM’s castings are awesome, but inherited issues from GM going cheap. The Ti valves from DelWest are great pieces, but have the wrong (cheaper) coating on them. GM should have went with a shaft rocker setup in those engines, in my opinion to help with geometry, but again, the cost would have been much more. In my opinion, the GM rocker pedestals aren’t beefy enough and are flexing. Good thing my opinion is worthless…At the end of the day, your typical Corvette owner would have ponied up a few thousand more for the better equipment, as would Z-28 guys. Both high end cars that fall into the cost doesn’t matter category.
Inspiration for you and fnbadaz06 and it's said to be street.. Chevy and a Ford. Makes one wanna Hit Back @ the same size.. 800+ keep it up too you Both..
As I look at this video above and I look at my big block chevy I am wondering who the xxxx was at GM that thought hiding the roller lifters behind a wall so you have to pull the heads off to take them out was a good idea? Could they have windowed it? I guess they thought the engines would last forever - they sell the car and out the door.
Im making the same power with a 4.125 stroke 454 and doing it 1000rpm sooner and with a plastic intake... The lsx block is windowed but to small to get the lifters out thru them
Brothers I post some things as a idea as there all just a Air Pump.. The Mustang video and races in Houston was for Mavn... There's No way in Hell although it Screams to 9k a 5.0 runs a 9 and a 408 @ 13.1 can't... Some use rpm others We use size and rpm.
I'm all about LSX thoughts and principles...
I've been looking over Team Z suspension stuff All night....HP + the Weight of = a ETA or ET. 60ft Bias
Also found Another Myth....in using a Larger Stall say 5000 to 5200 on the street to be .....for a lack of words it's the user choice.
Here's Diet Coke using a 5k+ stall from Circle D yrs ago I forgot about this video.. everyone has a different definition of street. But 5k doesn't look bad even with a Heavier vehicle.
Im making the same power with a 4.125 stroke 454 and doing it 1000rpm sooner and with a plastic intake... The lsx block is windowed but to small to get the lifters out thru them
1st time out Guys were using under Sized cams and heads.
john marcella said:The runner length in that manifold i would say is pretty close for an 8000 rpm motor but the cam is short and soft for 8000.So you don't really make the power you should up top where the manifold wants to be, or the TQ in the middle where the cam wants to be .
my thoughts on the 1st test.
But, It shouldn't be close on the 2nd test.. Specially on the zo6, Cam Lift and a Rev"able CCW 4¼ crank. GG switched for more Rpm yrs ago using the same combination 🤫 CID intake & a 4500 to 6500 would be best. Believe both are using them.
Only problem is the Piston speed...that's it. Erik has told me a Mozez head on something like this or the BES big port Ls7 is needed to fully Utilize the Short Block + Cam Lift.
Math says so also in CSA/MCSA for a 4.185 bore with a 4.250 crank @ above 7000 rpm.
Thing Needs all the Air one can give it...no Small Ports or low profile plastic intakes need Apply...if the need is HP and both seem to be wanting more. Holley showed what the MSD does vs the high ram. Sounds Funny now saying @ a 1000 rpm sooner at the same HP level and a CID is being used.
Given the same rpm the bigger crank wins if the bore stays the same size. Basic rules 🤯... it's just the Piston speed and deck height used is the only bad thing. But it Works.
If either engine would get to 8000 with +770 lift 🥳
830 to 850 fwhp easy...
If you'd really like to know these guys are Needing John B sized heads @ 302 cc...go ask Erik reason the Zo6 went up as Naiser used the Formula on sizing the head for the combination..
NO Hear say...Common knowledge, and not having to ask. 😉
Update 6 months later, it's been hell getting replacement pistons but they will finally ship on Friday, and we will put it back together. The 468 will be tuned on a engine dyno so I can get real numbers. Excited to see the results
That CID intake will do wonders. Erik wants to ship one out for me to test but it would never see street use in my Z06.
Going to Jon Simpsons billet lid with the Accufab throttle body on the high ram base picked up 20 HP on my engine dyno test......no other changes.
That straight shot to the intake valve does wonders
That CID intake will do wonders. Erik wants to ship one out for me to test but it would never see street use in my Z06.
Going to Jon Simpsons billet lid with the Accufab throttle body on the high ram base picked up 20 HP on my engine dyno test......no other changes.
That straight shot to the intake valve does wonders
l think so too, the CID will make it a whole new animal!
10-11-2021, 03:58 PM
