LS1Camaro320

iTrader: (16)

Alright so I just bought a 1994 Camaro Z28 M6. I was wondering if I need a tune and how much it would put down. The mods are the following:

- Comp 305, the specs are 220/230 .544/.544
- Ported heads and intake
- Scorpion Roller Rockers 1.6 Ratio
- Z06 Injectors
- Pacesetter Headers
- Soon to be no cat
- I'm not sure what muffler it has
- K&N Cold Air Intake

I think that is all motor wise. Let me know what you think.

Schweet97Z

iTrader: (35)

if the pervious owner never got a tune, you most def. need to get one done. i wouldnt imagine it running to well otherwise.

LS1Camaro320

iTrader: (16)

I will probably get a tune sooner or later but do you think it would be drivable how it is for a while? I haven't really had a chance to drive it since I live in Michigan. Also how much power do you think I am making?

infinitebird

iTrader: (11)

If it has the stock tune you should not drive it at all with the different injectors (if they are a different size from stock).

And you pretty much always want a tune with a cam anyway.

projekt70chevelle

iTrader: (4)

If you have to drive it before you get it tuned, i would suggest goin out for a short drive and do a couple pulls. Take it back to the garage and check the plugs. If they r in good shape then id say its fine, maybe check it a couple drives later to make sure its still fine. Although to gain the optimum driving ability and power out of the car you can always use a good tune.

P.S. I have yet to get a tune with my mods in the sig and have yet to have a problem. I will be getting a tune asap though. But til then shes my daily and drives fine.

Schweet97Z

iTrader: (35)

you have to be careful not to "wash" the rings from being too rich. alittle richer is better than alittle lean, but to rich can be a problem. i personally wouldnt drive it until its tuned.

96lt1m6

iTrader: (31)

you have Zo6 injectors in the car, they run at 58psi and your stock fuel psi runs less than that so you will be ok with the injectors.
a tune will definately help to maximize your set up.

LS1Camaro320

iTrader: (16)

Alright I think I am going to get a mail order tune for right now, until I get enough money to get the car dyno tuned. So my question is should I send it to madz28 or pcm4less? Also does anyone have a guess at how much power I am making?

iceman15

iTrader: (10)

It will prolly be fine to drive around without a tune but your gas mileage and plugs will suffer until you do get a tune. I sent my tune to Ion at Madz28 and he did a really good job and didnt take that long at all.

Formula350

iTrader: (3)

I'm not sure what the diff in price is between a dyno and a mail order, but unless you HAVE to drive the car (your DD), I'd just save the extra bit more for a dyno tune. I'm sure you'd be much happier with it.

Also, if you bought the Z06 injectors for that # rating, then you'll want a AFPR and an aftermarket fuel pump and crank it up to 58psi to get them pumping out what they should. But only do that after you get it turned. As stated, ring wash is "teh uber suq"

LS1Camaro320

iTrader: (16)

Thanks for the help. They previous owner installed the injectors and also an adjustable fuel pressure regulator, I believe it is set at 40 psi right now Also a mail order tune costs $125 and a dyno tune costs about $500.

Formula350

iTrader: (3)

Hmm yea, then I'd probably go with the mail order too haha I was thinking it was like $150 and $300 :S

LS1Camaro320

iTrader: (16)

You don't happen to have a guess at how much power I will be making do you?

Formula350

iTrader: (3)

I can't, too many variables for me personally to guess. There's where you sit in accordance to sea-level, and then how humid the day is and I never really saw a definitive answer if you had a previous tune for anything. If it's a BONE stock computer, you could pick up some nice numbers. If you want a number, I don't have any clue how close or accurate of a guess this is, but 20hp from the tune over a totally stock setup. How much from all the stuff you're putting in, I really don't know That's a question for someone else. I haven't dived into my motor yet to have done any research and find what numbers others are making.

LS1Camaro320

iTrader: (16)

Alright thanks anyway and the computer still has the stock tune.

daniel6718

iTrader: (36)

if itsd got big injectors now and no tune then dont count on that motor lasting longer than 5k miles

LS1Camaro320

iTrader: (16)

Fuel pressure is set lower than the Z06 injectors right now, so it should be good right? It will be tuned very soon.

daniel6718

iTrader: (36)

i wouldent count on it

LS1Camaro320

iTrader: (16)

So do you think a mail order tune will be good. I am not looking to get the maximum horsepower out of it right now, I just want to get it to where its safe to drive.

infinitebird

iTrader: (11)

Depends on what size injectors they are. If the difference is very small, it could be ok.

Still a bad idea to run untuned any time you change injectors though.