yeah if you are going by flywheel horsepower then I am there. The necked down piece of the intake after the throttlebody is the problem i could put a 90 mm tb and it wouldnt help.

I think I have that problem fixed with this

And this

 

Ya I was talking fly wheel, you're around round 490 at the crank as is, using 15%, 504 with 20% or 525 with 25%.

The boat guys were getting 560hp crank with ported intakes on 87 octane, then ran into piston issues, another 20 hp with 92.

That intake you are fabbing will help with upper power for sure.

Nice work.

peace
Hog

 

just some quistons
after all you guys invsted on those 8.1 do you feel they were worth it?
isnt a 6.0 ls motor better and cheaper and a less problem motor that can achive same hp and almost same tq with the same parts( ie heads cam intake .. etc)?
what is your setup ED?

 

show me a 9 to 1 compression 6 liter that makes that power and torque n/a? with those same cam specs and stock intake throttlebody stock injectors and a v6 maf no less. show me a stock 6 liter with 6 head bolts per cylinder. how is this a problem motor?

 

2 of my buddys have a 8.1 the motor burns alot of oil..and as we went from workshop to workshop and it burns oil... 1 quart every 3k miles with very mild use

we swapd to a 6.0 in one of the trucks and the owner says there is no performance differnce and the 6.0 have better mpg (obvious) better daily driver better overall motor expect for towing and hauling wich is a rare thing for him

dont get me wrong i have littel to no info on the 8.1

dont shoot me

also you have 2.1l more than a 6.0 so be fare on that matter

you didnt answer my quistons , we are between doing a swap for the other truck or moding it

 

It is easy to fix the burning oil issue.

 

how?

agin what is your mod list

sorry for the thread jacking but i realy wanna know how

 

pull the intake and take the stupid breather plug nipple out. tap it and put a pipe plug in it. 180 degree thermostat. If the throttlebody has a breather hole plug that as well. Vent the valve covers to a external breather can.

 

thank you, ill do that to the avalanch we have,

 

I havent been on in a while.. you guys are making progress... i hope to get mine tuned next month..

I see one of you mentioned 13 psi of boost... is that in the intake manifold? if so i need to up my boost.. on only 9 psi...

I think i can get 13 in the sububran on 9 psi now that i fixed the reduced engine power that kicked in a 83 mph. my last pass at the track was 14.5 at 80... but the 1/8 mile was a 9.0 at 78 mph... so with a full pass it should pick up at least 30 mph...


also good post on the intake.. i need to pull mine back off and plug it up.. i keep blowing the dip stick out.