any chance you have any cam specs for any of these setups just to see how aggressive they are

 

Yes sir i do.

The 413ci LS2 with Mast 245s 251/254 duration at .050-inches with .623/.623-inches on a 112 lsa

The 416ci with LS3 heads and intakeSpecs: 239/254 .624"/.595" 114+3

The 427ci LS7 combo with WCCH heads236/256 111 LSA .660/.660 lift

The 403ci with AFR 230s
247/251 .623/.623 112+3

The 418ci with PRC 247s
248/256 on a 112+4

The other combos I'll have to dig in my recipe book but i have plenty combos recorded. Again all are pump gas, 6 speeds and hydraulic roller. I can careless about automatics and E85 builds.

 

G Atsma
When have I not asked a question to the correct person and not got a answer?

Never
I have more fun getting answers for my own questions....who better than my own.

 

LS7 head is in a different league really. 12 degree, esy modded to 11 degree vs 15. Thats your huckleberry right there you can up port size til your purple in the face but that port angle makes a HUGE difference. As for how to pick a combo? You have to look at the slips from the track is the best way to know whats what because it will tell you what is happening over time better than any dyno. 1/8th stats are where you work the suspension, stall, tire. launch RPM etc etc etc etc. The mph you pick up AFTER the 1.8th is where the story on the heads/cam/cubes comes into play. Look there for your best power parts.

This thread needs the guy who used to work at New Eras data who was focused on NA combos. PSJ has the list of the fastest LSx powered cars of all time, which is a great resource. Fastest stock cube LS1 cam only car is still the TRex far as I know

 

You should really add mine and hios combo on there lol itll really make some conversation when you post stock cam specs

 

What was your RW?

 

So in other words the LS7 heads are pretty much they best you can get.
Does anyone know if the aftermarket LS7 heads are much better than a well done OEM LS7 head?
From my "expert" analysis the LS7 head has a great imbalance of intake to exhaust flow.
What's the highest exhaust flow CFM you guys have seen on an LS7 head?

 

The boys at Mercury Marine built a DOHC LSx head that outdoes the LS7, tested to well past 10K RPM Too

MAST and Franskenstein both have improved versions of LS7 heads ( re valve angle, porting etc ) and there may be more now I havent stayed up on the latest.

 

Exhaust flow is not that important in grand scheme. The majority of the super high end race heads have a substantial imbalance, just cam accordingly. The power is in filling the cylinder. Go aftermarket LS7 head, just to avoid the problems with the stock heads, it's a better investment. Mast, Allpro, Brodix, Frankenstein are the top ones. Brodix are probably the best bang per buck. Richard at WCCH has several versions of them that are proprietary to him for different size ports. If you want the best, Allpro is probably it. You never see them mentioned here, why I don't know. They are expensive, but not that much more than a Frank or a Mast head.

 

Very well said👍 Launch,Cam & Dual Quad.....that's the just of things and options with a LS 7 head. Find the one that will work for the job and have it ported for your CID & RPM. You can't go wrong doing it this way.

 

That DOHC is a great piece of engineering.
Only draw back is size and weight of engine.
The new modern cars won't have the room to fit this engine

 

Funny thing is I could Do anything I'm asking with Ls7 heads with my Ls3 heads....just the efficient/race mind way of doing things.

🤣😂😆😁😄🤐😯😢

 

So Bortous don't go thinking of buying Ls7 or Mercury heads for a 20 HP bump. I got u!

 

AllPro I forgot ( yikes ) yes fantastic head! Mark Carlyle has ( had? ) em on his record Vette. Baaaaaaaad machine that car

 

Was that the Atomic Orange rear mount car?

 

Yes aftermarket is worth it over oem. Oem piece is great, but you know for sure the valve drop is fixed, your runners tend to line up even more better, and you can get better valve angles. You do not need to worry about I/E ratio. It matters but it is like number 34 on the list. The piston will force the air out just fine.

 

Thought For you and me, Bortous.. from Chris Frank old post on YB on Ls3 heads......we spoken many times°

qoute:
only have two sets of the new design that have been dynoed so far on a Superflow 902 engine dyno. First was a set of our stage one heads on a hydraulic roller 408 with a 244/250 cam on a 110lsa installed at 106icl with .670 lift. 11.3compression pump gas with a fast manifold. It made 693hp @ 6900 I will have to call for the tq numbers.

The second one dyno'ed was a set of our stage 2 on a 414 solid roller street car. It had 11.8 comp. with a gm carb intake with an edelbrock elbow. Cam was 257/264on 109lsa and a 105icl .734 lift. It made 756hp@ 7520rpm


I just used the stage 1 head on the second setup with a SV-4500...260/274 cam vs what's above.
​​​​​​
.040 over vs .030 over ....👌
All Factory under 8k on pump gas -12.0 compression.. Hmmmmmm. If close 😎

 

Carlyles Orange ZO6 ran (runs?) twin front mount Garett 98's iirc

 

Maybe it was someone else with the orange C6. They had the IRS C6 record at 1 point and ran a huge rear mount.

 

I have lots of recipes in my personal cookbook. I do have a stock cube section in there as well.
Most of those cars that hauls *** on stock bottom ends are very lightweight cars run 11.1 or faster. The secret i tend to see with making them cars fast are the weight and the suspension.
I personally think guys that are running 6 speeds and that are serious about their e.t should have double adjustables on the front and the back.
The 60ft is critical. A stiff wall slick does magic as well.
I dont have your car in there.... most cars I have notes on are F body cars which are heavier than Vettes in most cases.
However, i do have Hio car and SLP IROC car in there. Both of those cars are fairly light, run 10s, and run stock cams in a LS6 motor.
I pay more attention to the stroker motors cause they tend to be in some cars thats not exactly lightweight but they get the job done.
I i dont pay attention to those 400 plus cube motors/cars that run 11s.

Anyway, one of my favorite cars is a 2000 Z28 car that weighs 3750 lbs with the driver. Combo? LQ block 402ci with AFR 205s by Mamo and a 92mm fast intake by Mamo. Pat G 240s cam. Run 10.80 @ 129 mph on a 17" hoosier QTP on vette wheels. Car pulls the 17 inch tires about 4 inches off the ground. Very cool ride.