LS1 heads on SBF!

Topic: LS1 heads on SBF! (Read 8962 times) previous topic - next topic

LS1 heads on SBF!

Reply #15 – December 08, 2007, 11:28:49 PM

ahh. why not just get custom pistons. no need for a special cam. and just throw a carb on it to run. then mill a 351w intake. if it's going to be cheap. the pistons will just be the the most expensive engine part. if he could install them himself on some rods.

but for the work he is doing id rather bolt a set of Clevland heads on and worry about changing water passages and a ford intake milld down or spacers. and run all ford parts. (guess youd still need pistons though due to canted valves) but hell ford did it! and you can even have EFi now. been done

LS1 heads on SBF!

Reply #16 – December 08, 2007, 11:52:29 PM

The custom cam is required because the valve arrangement on the LSx heads is different than the Ford heads. Using the Ford cam would result in intake valves opening when you want the exhaust valves to and vice versa...

LS1 heads on SBF!

Reply #17 – December 09, 2007, 12:07:05 AM

Quote from: HAVI;191694

Funny, I was gonna ask about the LS design vs. the modular motors in a different thread. On Wrecks to Riches the other night, they had an LS2 that made 400 hp and still got 20 mpg. It had me wondering what mileage the modulars get. Now using the LS heads on a Ford block, has me wondering what kind of mileage this'll get? It seems to me getting 400 hp and 20 mpg, would be pretty decent.

The Mark VIII's 4.6 DOHC can get 29 mpg in that car, you might expect 30 under the right conditions on the highway with an aerodynamic car.

Also, that's just with a 4 speed auto, with a T-56 you should be able to get even better mileage.

LS1 heads on SBF!

Reply #18 – December 09, 2007, 06:12:08 PM

in my mustang i have gotten as good of an average as 31.3 on the highway with the 5 speed. premium fuel only. 4.6 DOHC

LS1 heads on SBF!

Reply #19 – December 09, 2007, 06:35:35 PM

Quote from: shame302;191886

in my mustang i have gotten as good of an average as 31.3 on the highway with the 5 speed. premium fuel only. 4.6 DOHC

... The best I ever mustered with my V6 was ~30 mpg. As soon as the roads stopped being flat it dropped a few mpg's. Daily I get about 22-18mpg with mostly highway driving.

The 3v guys seem to get as good or better mileage than the sixes as well.

LS1 heads on SBF!

Reply #20 – December 09, 2007, 09:32:00 PM

Those GM LS heads on a SBF block (if they would fit) would be great news for the boys at Popular Hot Rodding and their "Project Orphan" Mustang.

They took a 87-89 LX Mustang that had a 5.0 in it and put a GM LS something in it, along with a factory GM 6 speed, and had the balls to published that terrible buildup in their mag.

Could they take SB Ford heads ( with some reverse engineering) and put them on a GM LS shortblock and try to fool people into believing it is a SBF?

LS1 heads on SBF!

Reply #21 – December 09, 2007, 10:44:01 PM

I keep thinking about the CAM thing and I know the E/I are different but going carb and putting the cam in 180 advanced would that change it. I’m to tired to think that hard right now but later ill probably answer it myself.

LS1 heads on SBF!

Reply #22 – December 09, 2007, 11:42:21 PM

Quote from: 83-88T-Bird Guy;191956

Those GM LS heads on a SBF block (if they would fit) would be great news for the boys at Popular Hot Rodding and their "Project Orphan" Mustang.

They took a 87-89 LX Mustang that had a 5.0 in it and put a GM LS something in it, along with a factory GM 6 speed, and had the balls to published that terrible buildup in their mag.

Could they take SB Ford heads ( with some reverse engineering) and put them on a GM LS shortblock and try to fool people into believing it is a SBF?

That "terrible buildup" went 9's for under $10,000 car included.

LS1 heads on SBF!

Reply #23 – December 10, 2007, 01:21:17 PM

My Mustang averages 25-26 MPG on the highway at reasonable speeds. That's WITH the blower.....

LS1 heads on SBF!

Reply #24 – December 10, 2007, 08:31:33 PM

Quote from: Aerobird Motorsports;191990

That "terrible buildup" went 9's for under $10,000 car included.

Sure it did...but is it more of an insult to the GM guys or Ford Guys when a GM engine is put into a Ford body? ( or visa versa) Or does it make the Mustang look glorious when it runs nines?

Most people in the stands at a track see that "Ford" running nines.

I just don't get. If I had an LS engine, (which by the way is a fantastic engine!) I would look for a S-10 or a 78-81 Malibu like everyone else is doing and stick it in it.

LS1 heads on SBF!

Reply #25 – December 11, 2007, 08:06:24 AM

Quote

If I had an LS engine, (which by the way is a fantastic engine!) I would look for a S-10 or a 78-81 Malibu like everyone else is doing and stick it in it.

I'd put one in a late '70's Oldsmobile Regency 2-door.

LS1 heads on SBF!

Reply #26 – December 11, 2007, 01:03:31 PM

Quote from: Innes;191976

I keep thinking about the CAM thing and I know the E/I are different but going carb and putting the cam in 180 advanced would that change it. I’m to tired to think that hard right now but later ill probably answer it myself.

NO it wont work all it will do is change the firing order the I/E are still backwards.

LS1 heads on SBF!

Reply #27 – December 11, 2007, 01:18:45 PM

Quote from: Innes;192220

NO it wont work all it will do is change the firing order the I/E are still backwards.

Exactly - you'd simply change the firing order from 13726548 to 65481372. The intake and exhaust valves would still open and close at the wrong time.

Now maybe, just maybe, if you could get the cam to run backward you'd end up with the correct timing, but that would involve a custom gear drive.

Thinking about running the cam backward - I wonder if a marine reverse-rotation cam would work - it would have to spin "normally" in this setup, but its grind would mirror that of a normal-rotation cam, which should fix the problem...

LS1 heads on SBF!

Reply #28 – December 11, 2007, 05:04:47 PM

Quote from: Thunder Chicken;192221

Exactly - you'd simply change the firing order from 13726548 to 65481372. The intake and exhaust valves would still open and close at the wrong time.

Now maybe, just maybe, if you could get the cam to run backward you'd end up with the correct timing, but that would involve a custom gear drive.

Thinking about running the cam backward - I wonder if a marine reverse-rotation cam would work - it would have to spin "normally" in this setup, but its grind would mirror that of a normal-rotation cam, which should fix the problem...

I like the way you think this would be a lot easer then a 700 dollar cam I almost want to hint to the guy but the way he thinks I’m sure he thought of it already.

I’m rooting for him

LS1 heads on SBF!

Reply #29 – December 12, 2007, 02:06:40 AM

but how Cheap is a "Marine CAM" for a ford roller?