[Svoman18]

Right now its unmodified and is only my daily driver and premium gas is killing me. So can I safely run regular gas?

 

[Quan Cheese]

What does the manual recommend? Nothing is wrong with 87 if the manual says so. If it says premium then you should run that no doubt

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[ShortySmalls]

what ever your manual or gas cover says you can run, is fine. And if your premium is like it is here, its only like 25 cents more per gallon so say 16 gallon fuel tank would cost like only like $4 extra, and if your like me i only get gas every 1-2 weeks

 

[TOM RENZO]

That engine is designed for Premium. But if memory serves me their is an octane switch on the dash. Not 100% on the SVO. NAVY can confirm . He is our expert on the SVO. If he tells you it is ok then i would take that to the BANK. He does not BS about the SVO. The most knowledge guy i have come across for the SVO and that is NO BS!! Bar none he is the the go to guy for the SVO. Peace Tom:bigthumbsup:bigthumbsup:bigthumbsup

 

[Svoman18]

They do have the switch I just wanted to ask and see if any else had been okay running it with just regular.
Shortysmalls I fill up every 2-3 days lol

 

[ohc230]

Almost any vehicle with adjustable ignition timing can run regular gas, by retarding the ignition timing, or in the case of a turbocharged engine, lowering the boost. Of course both of these options usually result in a loss of power. Spark lead directly affects detonation, which is the key factor that would tell you if the fuel octane is inadequate. If you have a loud exhaust, this might be difficult to determine. Audible detonation (knocking or pinging) should be avoided, since it can be very destructive to internal engine parts.

The bottom line, if you want to run lower octane fuel, lower the boost or retard ignition timing, if you hear knocking or pinging.:yup:

 

[TOM RENZO]

Craig the octane switch retards the timing and also reduces the BOOST ALSO. It pulls out app 6* of timing and reduces boost to 10LBS MAX. Peace Tom:bigthumbsup:bigthumbsup:bigthumbsup

 

[ohc230]

Thanks Tom, I did actually know that, like you, I've been at this game for a long time and I do own an SVO as well. Pics of my SVO.

My post was directed at answering on the broader topic of detonation VS octane, which still could pose a problem for other folks on these forums. Out west here, our fuel is a bit different than other states as it is mandated to have a minimum of 10% ethanol to manage permeation emissions. California law also states that fuel must contain at least 1.8% oxygen by weight. The addition of ethanol, results in an overall BTU loss of 5-6% over non-emission formulated fuel. I believe the loss of power is probably about the same with these fuels. It's my understanding that they will become federally mandated in a few years and from what I've seen, the re-formulated fuels don't seem to live up to their octane ratings.

 

[p_books]

Forgive a faulty memory but this applies to n/a distributors.

Didn't they come with some type of part that you modified on the distributor that could set it up for regular or premium fuel?

Don't mean to pollute the water.

ohc, sweet car. Whats the HP with the supercharger? First one i've seen like that.

 

[TOM RENZO]

YES BOOKS actually their is a calibrating link in the dizzy. They are marked in numbers and relocate the the PIP plate. But they are a bit hard to install on the 2.3. So a quick flip of the switch on a coupe or SVO and you are on your way. Actually the last SVO had a different setup and was designed to be compatible with low octane fuels of the future. The last SVO had lower HP contemplating lower octane fuels. Hope this helps Peace Tom

Craig i know you knew that. I know you would be right on top of this Thanks!!

 

[TOM RENZO]

Craig nice wind machine. Did you ever get it working?? I have read about those roots on the 2.3. Did you make a bunch of PONIES. Great setup to say the least. Thanks for sharing those photos. NASTY SET UP DUDE:bigthumbsup:bigthumbsup:bigthumbsup Peace My Brother!!

 

[ohc230]

Craig nice wind machine. Did you ever get it working??

ohc, sweet car. What’s the HP with the supercharger? First one i've seen like that.

Yes it is working finally. I had to get through some initial tuning issues with off idle and snap throttle stumbling, manifold leaks and blower belt alignment. The overall performance of the engine in its current state is fairly impressive. There is no lag whatsoever with this system and it hits like a ton of bricks. The supercharger supply’s 7 psi of the total boost in the system and about 300 CFM in volume. It essentially fills the void that the turbo can’t, during throttle transitions and low engine speeds, where all it would normally do is lag. I have only made one dyno pull with the car on pump gas. It turned out 479 HP and 505 ft lbs. before hitting the "octane wall" Obviously that’s more than the SVO chassis was designed for and I have been extremely careful with the car.

I currently have 2 different supercharged Mustangs, one is an 85’ SVO, the other is an 89’ The 85’ SVO in the pictures is a compound supercharged set-up, with a Turbonetics T3/T4 on the exhaust side. The engine picture was taken during the assembly of the 85’ SVO engine, which was originally equipped with an Eaton M-112, but has since been downsized, to an Eaton M-62. The supercharger sits atop of a liquid intercooler, attached to the bottom half of the intake manifold. It was necessary for me to use Laminova inter-cooler cores due to space limitations; this required a lot of extra machine work. A typical front mounted inter-cooler takes care of the turbo side. To avoid attention, I have left the rest of the car as you see it in the picture, except for lowering the ride height 2.5”

 

[p_books]

SOB!
That is some SERIOUS PONIES!

 

[ohc230]

It seems like a lot when I'm just driving down the road. I’m more of a road racing guy than a drag racer, so for my purposes, this will be more than enough power for the SVO chassis. As it sits now, it’s all most a waste of time to floor it in 1rst gear, since it just shreds the rear tires. I currently have some 225 50 16 “R” compound Khumo’s on the rear. I am contemplating widening the rear rims and using 245 45 16’s to put a little wider footprint on the ground.

The only thing I’ve raced against has been a 09’ ZR1 Corvette. I surprised the hell out of him with my Mustang. In a heads up race, we were dead even up to my max speed, where he finally began to pull away. Damn those ZR1’s are fast! The Vette owner pulled over and talked with me after our race. Very nice guy, he told me that the ZR1 makes over 640 HP from the factory, I believe it, but his car cost over 100 grand.

 

[p_books]

Ditch the korean rubber.
If you were to use the same in the bedroom, you'd have the old woman in the boot syndrome.

 

[TOM RENZO]

Nice and that is some sereyous HP. I LIKE IT. Peace Tom

Time to do some TUBS and get some sereyous rubber on the ground. just saying. Rubber foot print is directly porportional to traction I THINK D'OH!!!:bigthumbsup:bigthumbsup:bigthumbsup