Header install vibrations

[willie14]

Have u tried a different gap on your sparkplugs? That seems like u pulled a ton of timing out to keep it down.

 

[willie14]

I'd hate to have to jump back up a pulley size because I couldn't get the tune right with a smaller pulley, but I guess that's where the tuner pros gonna come in for me as this I gonna be my first 3800 build

 

[coolone]

Bigger pulley doesn't always equate to more HP... Smaller pulley no knock ++timing = ++HP
: )

 

[Scottydoggs]

lets just say, your not running a smaller pulley with out more flow mods, or a ic, or e85.

i got ported heads, 1.95 rockers, a fsic ported lim, and 42 lb injectors. it wont take much timing at 10 psi. but at 7 psi it will take 18 degrees wot.

your best to buy a tuner, canned tunes dont always work so well for a top swap. they need tweaking to get right, then you can play the boost vs timing game. no tuner,,,,you'll never know what its capable of.

 

[willie14]

I gotta buddy of mine who does it for a living who's going to tune my car as I modify it. Right now he's tuning a g8 so I'm pretty anxious to see what that and my car is capable of

 

[Scottydoggs]

before the ic, i had a 3.4 on there, it was getting 6º kr at part throttle with stock l67 timing. so i put the stock pulley on and then ran one degree less wot timing and it had no kr at that point.

 

[willie14]

But your losing engine performance by having to go back to that stock pulley tho right?

 

[Grimsin]

Still more compression then a l67.

 

[WarStryker13]

with an N/A bottom end, an otherwise stock L67 or L32 will make ~5 more HP than a bone stock s/c engine, but KR is a much bigger issue and a top/bottom swap needs to have flow mods in order to be safe.

 

[willie14]

I forgot he's got a L36 bottom end