SunOfZ

iTrader: (3)

ok so i just dyno tuned my 99z28 after my 6.0 swap. my question is ...if i replace my stock ls1 intake manifold with an ls6 manifold, do i have to re-tune?

RedHardSupra

iTrader: (1)

yes, you change the VE, the table expressing it must change to reflect that.

Mike454SS

iTrader: (4)

My tune changed a surprising amount when I swapped to the LS6 intake on my car. I knew it'd need some adjustment...but it was more than I thought it'd be.

RedHardSupra

iTrader: (1)

to a degree yes it will learn, if your CL is enabled and O2's functioning perfectly. however, with the number of people who dont/cant use CL, they gotta do all the adjustments by themselves.

badmfkr

iTrader: (4)

I had a HP tune after the street stripe cam, then added a FAST78 intake manifold.

I was hopping the PCM would learn this new intake manifold.

I'm planning on reaming out the opening of the fast78 to 80mm and adding a
zo6 85mm MAF and 30lb injectors then mods will be done for this 346CI motor
and one final tune.

you're thoughts on this plan

Thanks

mcamarols1

iTrader: (9)

Wait till you have all the mods before you go get a tune.

To the OP the Trims can only do so much, and when at WOT it doesnt use the the 02s for fueling its all MAF and off the PE table

badmfkr

iTrader: (4)

on a mildly modded WS6.

do the stock 75mm MAF max out at WOT sending inaccurate reading to PCM resulting in incorrect fueling?

if yes then will a ZO6 85mm MAF also max out or is it plainly a better air meter?

Thanks

mcamarols1

iTrader: (9)

If I remember right the stock MAF can support up to 500whp, but like I said I'm not sure.....even then, you said you have a 80mm TB and plan on opening the FAST78 to 80mm. The stock 75mm MAF is going to be the bottleneck. Will that setup make more power than your current setup,..? probably.....Is it optimal,...? Not really. Im running a FAST 92 opened up to 95mm with a 95mm TB and the Z06 85mm MAF and a FTP 85mm lid, yes I know i have a bottleneck but its less than the stock 75mm MAF.

EDIT: when using the Z06 MAF you need the 5 pin adapter because the IAT sensor is integrated into the the MAF.

badmfkr

iTrader: (4)

Yes I think you're correct about the 75mm MAF good for 500RWHP.

?since I'm only at 380RWHP the 85mm MAF maybe a wasted effort? or could possiablly make car run worse?

I'm curious about enlargeing the MAF ? when you installed the 85mm MAF did you have to get a larger air lid for it to fit?

I haven't bought any of this stuff yet, I'm just planning.

Thanks

NSSANE02

iTrader: (14)

Your car will be ok to drive but you would need to fix the VE to get the tune correct.
Don't mess with your MAF, it would be a waste of time and money with your setup.

badmfkr

iTrader: (4)

would the 80mm TB also be a waste of time?

Thanks

NSSANE02

iTrader: (14)

Not so much a waste of time but definately a waste of money. A ported stocker will work just as well at a fraction of the price.

mcamarols1

iTrader: (9)

It really comes down to what you want to do with the car in the future. If you plan on getting heads, a matching cam for the heads, then dont waste your time doing things twice, but if its a budget minded street car, your stock MAF and a Ported TB will get the job done. You would still need to tune your car and get the STOCK MAF recalibrated to get it to run optimal....but its all on what your budget can handle.

badmfkr

iTrader: (4)

I have a ported TB. looks like I leave it alone. Thanks for feedback

the car has been tuned for my cam and LTs,car needs a retune for the FAST 78.

I was thinking do a few small mods before this retune plus when I installed the FAST 78 I have my suspions on not glueing the MAP sensor good enought (or the glue has hardened and cracked) creating a everynow & then check engine light.

If I have to remove the intake to reglue mite as well open it up a bit.

Yes it's mainly a street car, my plan is to mile it up as it is, really can't use all the power on the street tires it's making w/ a street stripe cam and LTs.

Looks like I'll have the man retune for the intake and just enjoy it for a few more years, then go all out and hog wild.

Thanks Guy's for excellent feedback

SunOfZ

iTrader: (3)

thx for all the info so far guys. im still contemplating throwing my ls6 intake on there and seeing how much it will learn before i re-tune. my other option is just waiting untill i get my new heads but not to sure when i can afford that. so throwing on the ls6 intake is tempting right now.

Phil'sC5vette

iTrader: (4)

If you have to pay for an additional tune, I would NOT do it and the car will run fine. Your only going to gain a couple HP from the LS1 to the LS6 manifold.

IF you brought your car to a tuner that give you free upgrade tunes, then Id stop by, but he wont change much anyway.

Slowhawk

iTrader: (12)

Yes,it's a good idea. Just did a car a few days ago that swapped the intake like you. The A/F was 13.8-1 across the board(from 12.8-1 before intake)So it needed some more fuel.

NSSANE02

iTrader: (14)

Wow I had no idea it would lean out that much. If that's typical for this swap I would definately get it retuned if you plan to race it a lot.

Engine_HP

iTrader: (1)

yes get it tuned.

SunOfZ

iTrader: (3)

ok so guaranteed i am getting the car tuned after the intake swap thats no problem. im learning a ton right now since im new to tuning. so my options right now are pretty simple. A- do the swap and ride without re-tuning for the intake for about 3 or so months until i put on the new heads and then do a dyno tune with new heads and intake. i do daily drive the car but pretty much locally. as far as racing goes i dont plan on any track time until the heads and tune are finished. but maybe a little street fun here and there. B- just wait on the swap until im ready for the heads and do everything at once. im just at a crossroads because the intake is just sitting there waiting to go on and i just made 395rwhp without it. haha 4??rwhp just sounds fun and pretty much guaranteed attainable with the intake. i definitely dont want to hurt anything so let me know what you guys think. thx a lot guys everyone here is awesome!