Jallen24

Alright guys I have a 02 z28...bone stock auto car, a friend of mine has some ls2 heads he's trying to sell so my question is how much of a gain would I get if I put them on my ls1 an is it worth the time an money I'd have in the swap??

redtan

iTrader: (5)

20-25rwhp should be the gain as cast. It all depends on you whether or not they are worth it for the time and money.

NIUhuskies

iTrader: (4)

Are they a direct bolt on? will ls1 headers fit on them?

scphilli

iTrader: (2)

Direct bolt on and your gains would depend on the tune and what else you have to help her breath

Jallen24

Alright, thanks for the info

lilmiller74

his mods are going to be the obvouse bolt-ons. Lt's, Ory, lid and posibly p&p maf and tb...Also how beneficial is it to have the maf and tb ported and polished?

1badeagle

iTrader: (9)

Go sd and lose the maf!!

lilmiller74

The car is going to be driven alot, that wouldnt be a good idea.

1badeagle

iTrader: (9)

Why not? I know alot of guys that are running sd setups on daily drivers with zero issues.Better throttle response and better mpg than they were getting before and no need to get a bigger maf.

redtan

iTrader: (5)

Why not? I daily drive a SD tuned car (17k miles a year) through hot summers and bitter cold winters. In over 3 and a half years since I ditched the MAF I have not had an issue...so why is it not a good idea to run SD if driven a lot again?

Jallen24

What is speed density exactly??

Tainted

iTrader: (9)

Its a tuning deal where you get rid of your mass air flow sensor

Jallen24

Pros and cons?

lilmiller74

Where we live the weather is different all the time so if it has an sd tune its not going to be making the most power that it can when the weather conditions arnt perfect.

1badeagle

iTrader: (9)

It will be fine princess trust me. Scooters car runs strong all the time and so does mikeys!!!

redtan

iTrader: (5)

What are perfect weather conditions and why is my SD tune not making the most power again?

lilmiller74

Im not quite sure why the sarcasum but its whatever....with and SD tune its tuned to one certin condition witch is whatever the weather is when you are tuning the car. Also most of the tuners in our area prefer maf tuning not SD...Im not saying its bad or one is better than the other its just a personal preference.

redtan

iTrader: (5)

It's not sarcasm, but I've been tuned SD for years now and I've never thought that I was missing out on power due to the choice of tune. I am curious as to why this is that's all, not trying to be a dick.

Also, my car does have both an IAT and MAP sensor, so it can actually read the weather conditions out there that matter most and the tune itself can accommodate for changes in such both at WOT and part throttle.

Now it might not be adequate at making changes if the altitude changes (which I don't forsee myself going anywhere past 1000ft. above sea level anytime soon) but besides that the tune can compensate just fine for temperature and humidity changes in the weather conditions.

So what other weather conditions is my SD tune not able to compensate for?

And I think most tuners prefer MAF tuning over SD because of simplicity and ease of tuning, not because it's that much smoother and reliable than SD.

5 Liter Eater

iTrader: (5)

+1 for SD tuning. Although I don't see a need for it in this application. Your stock MAF will not pose a noticable restriction. Typically I'll use it on big cammed NA cars where lots of overlap can cause the MAF to read irratic at idle and just off idle as the MAF does best with non-turbulant flow. That and FI applications where the MAF is maxed out. I've been running SD for years and do not see my AFR or fuel trims swing due to weather. Only a drastic altitude channge would require a change to the tune.