82cetuner

iTrader: (9)

93 pump gas. fast 102 I ported myself to match the heads, 102tb and no maf. speed density tune,

82cetuner

iTrader: (9)

cam is what i would consider mild for a 418, .624 both sides with 239/254 and 113 plus 3. and the torque curve is like a flat table top. thats why ive never bothered changing heads so far I havent found to many people with setups like mine making any more power unless they have much bigger cams

Jimbo1367

82cetuner,
graph ?

josh4ku

iTrader: (10)

Maybe I missed it. What kind of fuel mileage does this get?

Tony @ Mamo Motorsports

Here is another thread about the results of a very similar 416 build I helped a customer with. Its a good read also but to more specifically answer your question see his post (#36 in the thread) where he discusses fuel economy.

https://ls1tech.com/forums/dynamomet...results-2.html

And FWIW, Jack's cam in the thread above is more aggressive than the cam in this particular build....that helps HP a little but clearly hurts in the MPG department.

Hope this helps!

-Tony

josh4ku

iTrader: (10)

Isn't that this thread

Tony @ Mamo Motorsports

Yes....LOL....got this confused with another!

Either way I provided you the info you seeked

vetteboy2k

iTrader: (5)

TONY:
Can you do a small bore (TFS or Mast casting) Ls3 square port head design to fit a max effort high rpm 346 that doesn't care about torque? Then top it off with a Mamofied ls3 fast 102 manifold for a drag race application.

vetteboy2k

iTrader: (5)

You should consider my high rpm 388 for purchase. It's all refreshed and proven on the drag strip.
Just needs to be final assembled. It took a year to design and put together. Most people underestimate how long it takes to get these engines built and running. I'll get you a great price too.

Tony @ Mamo Motorsports

Dont have anything like that....a 3.900 bore is just too small for a large valve/large runner head like an LS3.....even an LS3 is barely enough IMO. You would be surprised how much power an optimized combo with my cathedral 220 heads would make swinging for the fences....well over 500 RWHP with a much more explosive feel to the throttle.

DarthV8r made 497 RWHP with a 227 intake lobe!.....what could we make with a cam closer to 240 degrees in a max effort application!?!

You have to properly size the heads to the engine in question.....a 260+ cc port is too big for a 346.....period, and that design doesn't lend itself well to a 3.900 bore.....your just limited on what you can do. Its more cost effective to build a stroker than sink a ton of money into a big port/big valve combination that just wont work that well anyway.

-Tony

vetteboy2k

iTrader: (5)

There's a square port head out there for small bore with a 240 cc runner that uses a 2.08 I valve and 1.60 exhaust. That's along the lines of what I was thinking for a max effort 346 setup.