02WS6Bird

iTrader: (2)

i kno headers need to be tuned especially wiht the A/F ratio...i dont recall a catback needing one nor a Lid+CAI

So what needs it other than headers?

Ported TB? yes/no
MAF? yes/no
Underdrive crank pulley? yes/no
T-stat? yes/no
Electric water pump? yes/no
Spark Plugs? yes/no
TB bypass? yes/no

anythjing else?

2MuchRiceMakesMeSick

All of those can benefit from a tune except pully, water pump, plugs, and tb bypass. A tune is not really NEEDED untill you install a large cam but you can squeeze out one or two horsepower if you want to tune with each of those mods

02WS6Bird

iTrader: (2)

so really headers maf and T-stats need tuning or atleast some sort of toggling with the computer to make it right?

so if i wast to istall all botlons except a MAF...all id NEED to mess with would be Headers and T-stat

mrr23

iTrader: (3)

the wife's 99 formula has these bolt ons.
VHP airlid w/polyfoam filter
VHP MAF ends
VHP 1.89 accelerated lift rockers
VHP dual springs
Bassani optimum length headers
Borla catback
here's the dyno of it. this is with the factory tune. as you can see it runs right on the 13.0:1 a/f ratio. it just depends.

2_wacko

iTrader: (2)

If you put NOS you will need a good tune.

Durien

I never had my car tuned when i had boltons only..

and it went 11.7s@118

davered00ss

iTrader: (4)

I would tune after every mod to make sure you get the benifit of the mod. Some mods will lose hp w/o tunning.

cyphur

iTrader: (10)

Tuning is only required after installing a new MAF. And only if you run the Delphi LS6 85mm MAF, since thats the only other MAF which has known tables for it. All the others can be run w/o tunes, the only one I would considering getting tuned by a buddy w/HPTuners would be for headers. I wouldn't blow $400-$500 on a dyno tune unless its one of those where you get free tuning for life w/it. Then when you get a cam or heads or NOS you can just roll up and get a new tune. Or you could buy HPTuners and learn to tune yourself

shortdog

iTrader: (1)

^ I disagree, but like I said before, every car is different. Before tuning: 12.71 @ 106.57 (hit 107.01 once). After tuning: 12.40 @ 109.75, then backed it up with a 12.44 @ 109.76.

I payed a guy with the HP Tuner software $30 for a basic tune and it made a hellava difference.

mrr23

iTrader: (3)

i added 175 n2o to her car on top of all those mods. still no tune. runs 11.843 @ 121.16

86 IROC

iTrader: (14)

What bolt ons do you have? And what converter?

shortdog

iTrader: (1)

^ Bolt ons are: Mti lid, k&n filter, slp cai, ls6 intake, msd wires, ngk plugs, flowtech lt headers, ory, cutout, hooker catback, bmr lcas & tci ssf 3500 stall converter.

86 IROC

iTrader: (14)

Thanks, I always like to compare notes with similar set ups.

P Mack

iTrader: (6)

Filter? No
Catback? No
Ported TB? NO
MAF? Yes
Underdrive crank pulley? no
T-stat? yes (fan settings & timing)
Spark Plugs? no
TB bypass?no

Remember, this is only true if your tune is good before the boltons. It's possible for a bone stock car to have a bad tune.

2MuchRiceMakesMeSick

This will make or break an engine with gass.

GuitsBoy

iTrader: (4)

I gained on the order of 30 RWHP from a home grown tune with my relatively tame boltons. Im constangly fiddling with my tune and I keep tweaking a little more power here and there and im getting closer to perfect streetability (better than when it was new). Aside from the extra peak HP up top, the rest of the throttle positions feel crisper and more responsive.

02WS6Bird

iTrader: (2)

so Maf/Headers/T-stat...ok now one more major question...ideal not rich not lean jsut RIGHT A/F ratio?

boosted03cobra

when i put my headers on my car started to run rich i never tuned it though

2MuchRiceMakesMeSick

Me either. Didnt really see the need to untill I put the Trex in.

02WS6Bird

iTrader: (2)

well i dont wanna run rich nor lean...i want it just right...i mean will LS1 speed jsut set it to whatever they find i besT?...or will it needa be a certain number anyway?...whats the ideal one between 12.8-13.1?