is the 109 unleaded?
i thought the highest unleaded was 105, hmmm maybe that is just with VP

 

the 109 is unleaded and oxygenated also. "Actual" motor octane is 101

Where VP100 "actual" motor octane is 96

 

I've ran a 200hit on 93 for a while, my tuner has ran a 250hp on 93 for years. Its all about the tune.

 

Right, I do agree it's all about the tune.

Just using this as a safety device now. I checked the the "local" station that had 100 octane, doesn't carry it anymore.

I'm going to do some more reading. I'll either run straight race gas, or do a mix. Play around with it on the dyno and see what happens

Does anyone see a need of why I SHOULDN'T use the stock tank? I would think it'd be a PITA to swap the fuel pump connections etc to fit a 5 gal cell?

 

I prefer to up the shot a little over throwing more timing at a slightly smaller shot any day. It is easier on parts and safer over all.

For example, if you are spraying a 32 jet with X amount of timing and the plugs look good and you are close to breaking into the 10's, instead of running more timing to get a little more out of it I would rather just throw a 34 jet in it and keep the timing mark where it should be.

As far as 150 being the safe "limit" on the stock bottom end...The tune up is important but the way that you bring the nitrous in will either keep the motor alive or kill it instantly. Using a progressive or running separate stages is the key. I think that a stock LS1 bottom end would surprise alot of people as far as how big of a shot it could handle, With the right person calling the shots of course.

 

Why would you want to? You would have to pull a ton of timing to get away with spraying 250 on 93 octane... I just don't see the point?

 

I plan on spraying 150 straight out of the hole to get this pig moving.

How much could I spray on the stock bottom end, plus the high octane?

I don't have a progressive, really didn't plan on it...should I???

 

street car at the time but I agree with you

 

100% agree with this statement. I think we will be able to help prove this statement true.

 

seems like your going through a hell of a lot of trouble for something 93 can handle imo. what are your goals for this car ? why are you taking such a mild car off the street and into a track only car? run it on 93 and be able to drive it on the streets if you want imo.

 

You don't need a progressive if you are only wanting to spray 150 or so.

It depends on how good you are at tuning a nitrous car. If you don't have a whole lot of experience the I would recommend staying around a 200 shot. Reading plugs is only part of being a good tuner. It's knowing what to do to get the results that you want that separates the men from the boys.

 

I don't doubt that a bit!

I am building a stock bottom end 6.0 for a customer right now, it is going to see some serious doses of nitrous.

 

I know its already been said and not to sound like a dick or anything but....I don't understand most of this thread? Not faulting the OP for his question because the only stupid question is the one that isn't asked, but why so much debate about something that isn't even really relevant for his build? There is no reason why a cam only car with a 150 shot needs race fuel. Granted I am not super experienced with nitrous and I'll admit that, but really there is nothing about his build that I can tell that would begin to warrant using anything above premium pump gas.

 

Just extra insurance. That is the only reason to use the better gas in this situation.

 

Extra insurance is always a good thing. I guess my question is how much risk is there in the first place with pump gas vs the 100 octane? Not arguing with you or anything. I mean that as a serious question, I'm mostly in this section to learn. It just seems like I've seen so many crazier builds running around on pump gas with no issues.

 

This car will slowly turn into a not so mild car over the years. I'm not driving it on the street because I hate it as a street car. I bought my corvette last year, which puts 730hp to the ground.

So, I'm in the odd situation right now of where my "weekend" car, can beat the snot out of my "race car" lol.

Eventually the car will get an automatic, then a larger and forged engine. My goals are to go 9.50 maybe.

 

oooooooook now things are making a lot more sense!

 

Sorry, guess I should have stated that at the beginning.

Yes, the race gas is way overkill for the car for now. But so is my drivetrain setup.

Building it from the rear forward

 

Using higer octain is a great buffer against detonation. The key is using the right octain. You have to keep in mind while the key is not to under octain the motor you also need to avoid over doing it. If you use to high of an octain fuel the fuel is heavier and it burns slower there for if the car does not make the power and compression to burn it, you will actually lose power.

With a fuel injected car using the 02 sensors you need to make sure you stick with a non leaded gas in the main tank. Leaded gas will kill an oem style 02 sensor quick. You need a NTK style sensor with leaded gas.

With that being said looking at your mod list of a bolt on cam only car spraying a 150 shot using 93 octain gas will the correct tune up is all you need. Yes running something like a 109 unleaded is a better gas but in all honesty with your combination I feel the money would be better spent somewhere else.

As to the progressive controller. In all honesty its all in the suspension and tire. 3/4 of the race is in the 60ft. They key is plant it and hot it with everything you can as soon as you car.. A progressive tuner is a great tunning tool to aid in traction loss. But In all reality many people use a progressive when they should really be looking into tire and suspension.

If you were making alot of power on motor and then hitting a large shot the progressive would be money well spent..

With your mod list if you have an issue planting a 150 at the power level you are at I would suggest saving the money and spending it on tire and suspension. Then hit that 150 out the box and see the wonderful results nitrous has to offer.

You are on a good track. Thinking things through and being careful is a great way of going at it.
Dave

 

Let me add, You need to look into upgrading the fuel system if you have no already. Correct plug choice, timing, and airfuel will be the key to having great results.