V6 Guys Only

[ROD1]

Originally Posted by spyderbuddy

So, just I understand, 93 octane is not going to hurt my engine or systems. And 87 octane is not going to hurt anything either since the car was designed to run on this fuel. We know the gas mileage will not really change unless you change your driving habits. I haven't really seen a difference. But we could see a performace difference though it may just be because the timing is not backing off.

If your not pushing it and your driving to get good gas milage then I don't think you will notice much difference using 87 since it won't be pulling much timing and you will get the benefit of the full stroke.

[spyderbuddy]

Ok, Well I put 87 octane back in the car last week and Damn, the Camaro just really did not want to run as good as it was. She got sluggess and well just did not want to go. I put 93 octane in it this week and got her back to running good. So, as far as I'm concerned I'm running 93 octane until it gets so high I can't afford it.

[dannkimmel]

ive been thinking about this......and
i was wondering if it wer possable that due to
production "tolarances" so to speak.
is it possable that some of the 87 octane is actuallly less than 87
and therefor when some one tries somthing higher there is in fact a differance becuse the car was not getting the 87 it was ment to have?

in other words by useing 89 or better one is sure of getting the 87 minumum?

[USAFJeeper]

I tried 89, not as good as 93 to me. Again, YMMV!

[renke]

During the Hot Rod Power Tour I discussed what I had learned from the two dyno runs with a person walking into the Mid America Motorsports facility as follows:

1. Hytech Motorsports DynaJet Dyno 241 HP 224 TQ regular gas 87 octane

2. St. Paul Automotive Mustang Dyno 264 HP 222 TQ preimum gas 92 octane

The person then identified himself as an engineer from GM Performance Division and the results are exactly what we should expect from the 217 CI 3.6L V6.

He then stated with 100 octane gas the engine can produce ~300 HP at the rear wheels or 371-375 HP at the driveshaft. WOW! Why buy a V8?

If you use a higher octance fuel and drive the engine hard you will see more horsepower out of the new 3.6 L.

[priz23]

Originally Posted by renke

During the Hot Rod Power Tour I discussed what I had learned from the two dyno runs with a person walking into the Mid America Motorsports facility as follows:

1. Hytech Motorsports DynaJet Dyno 241 HP 224 TQ regular gas 87 octane

2. St. Paul Automotive Mustang Dyno 264 HP 222 TQ preimum gas 92 octane

The person then identified himself as an engineer from GM Performance Division and the results are exactly what we should expect from the 217 CI 3.6L V6.

He then stated with 100 octane gas the engine can produce ~300 HP at the rear wheels or 371-375 HP at the driveshaft. WOW! Why buy a V8?

If you use a higher octance fuel and drive the engine hard you will see more horsepower out of the new 3.6 L.

Can he point us to the gas stations that have 100 octane!

[UrInsan3]

When I bought my car I asked if I should put in higher octane. They said no, to keep it at 87 - it's what the engine is made for. If you're going to switch, you should do it from the start. In my dad's 928 he switched octane randomly after having the car for years and now can't switch back because his idle rev is jacked up. Also, the mechanics at the dealership can tell if you've been running the improper octane, I don't know if they'll complain if you're running higher octane in a v6, but you'll have warranty issues if you run 87 or 91 in a v8.

My 2c.

[Maurdib]

Originally Posted by UrInsan3

When I bought my car I asked if I should put in higher octane. They said no, to keep it at 87 - it's what the engine is made for. If you're going to switch, you should do it from the start. In my dad's 928 he switched octane randomly after having the car for years and now can't switch back because his idle rev is jacked up. Also, the mechanics at the dealership can tell if you've been running the improper octane, I don't know if they'll complain if you're running higher octane in a v6, but you'll have warranty issues if you run 87 or 91 in a v8.

My 2c.

YOu will never get in trouble from running a higher octane, but you will running a lower, I started using 91, and the car seems more powerfull, could just be wishfull thinking, but hey I'll side with the GM engineer lol

[SummitWhiteLS]

Originally Posted by renke

... The person then identified himself as an engineer from GM Performance Division ... He then stated with 100 octane gas the engine can produce ~300 HP at the rear wheels or 371-375 HP at the driveshaft.

First of all, what exactly is "drive shaft" hp? I heard of "crank" hp and "whp" hp, but that's it.

Second, there is NO FREAKING WAY that our v6 (or any other production engine) is going to make an EXTRA 70 hp at the crank with just race gas.

Not gonna happen. Nope.

That guy either didn't know what he was talking about, or he was just plain lying.

I mean, think about it ...

Q: If a supercharger usually adds around 90-100 hp at the crank, then how can just changing to race gas in an otherwise stock engine gonna give someone 3/4 of that?

A: It Can't.

[67 GTO]

My car runs great on 93 Sunoco, I'll drop back to 89 when the cost of fuel goes ballistic. The manual sez 87 or higher, good enough for me.

[Maurdib]

Originally Posted by SummitWhiteLS

First of all, what exactly is "drive shaft" hp? I heard of "crank" hp and "whp" hp, but that's it.

Second, there is NO FREAKING WAY that our v6 (or any other production engine) is going to make an EXTRA 70 hp at the crank with just race gas.

Not gonna happen. Nope.

That guy either didn't know what he was talking about, or he was just plain lying.

I mean, think about it ...

Q: If a supercharger usually adds around 90-100 hp at the crank, then how can just changing to race gas in an otherwise stock engine gonna give someone 3/4 of that?

A: It Can't.

Then I guess you know more then the perfomance engineers then right

[Deepsky]

Originally Posted by spyderbuddy

Ok it would cost me to much to just go buy gas that has no ethanol. There no stations listed for albany ga. We do have a SHELL but most everyone around mixes their fuels with ethanol

This is the way it is...Our good friend in Venezuela, Hugo Chavez, owns CITGO. He does not put Ethanol in his gas.
It is the way to go (at least in S.C.) for ETOH - free gas if you do not mind supporting a dictatorship.

The station near where I live advertises with a huge sign -100% GAS no ethanol.

[spyderbuddy]

Originally Posted by renke

During the Hot Rod Power Tour I discussed what I had learned from the two dyno runs with a person walking into the Mid America Motorsports facility as follows:

1. Hytech Motorsports DynaJet Dyno 241 HP 224 TQ regular gas 87 octane. So if this is the 312hp at crank

2. St. Paul Automotive Mustang Dyno 264 HP 222 TQ preimum gas 92 octane. Does this mean we have 335 hp at crank?

The person then identified himself as an engineer from GM Performance Division and the results are exactly what we should expect from the 217 CI 3.6L V6.

He then stated with 100 octane gas the engine can produce ~300 HP at the rear wheels or 371-375 HP at the driveshaft. WOW! Why buy a V8?

If you use a higher octance fuel and drive the engine hard you will see more horsepower out of the new 3.6 L.

So if i add BK's Headers which are good for approx 33 rwhp
And a Cold air intake say 5 - 10 hp


we could end up with say 373 - 378 hp at the crank. Roughly we could be seeing in the neighborhood of say 300rwhpwow

[Wingsfan]

I didnt notice any diffrences between grades.