Spitzer Altered with LS1
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Teching In
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Joined: Sep 2011
Posts: 40
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From: Spartanburg County, SC
Spitzer Altered with LS1 This was my winter project - removed the carbureted LT4 and installed an LS1 with Holley HP EFI.
1999 block, 2001 rotating assembly, new rings, new bearings, LS2 heads, LS6 intake, ASA cam, stock LS1 throttle body.
Powerglide, 8" 4000 stall converter, Ford 9 inch, 3.70 gears, 33x15 slicks.
Holley EFI fuel pump, Holley 66 lb injectors, E85.
Weighs 1590 lbs with wing, wheelie bars and me sitting in it.
Ran 9.20 @ 141 on first run ever, launching at 3000 rpm and shifting at 6000 rpm, closed loop WOT, 7.8 target AFR (E85), 25 degrees ignition advance.
Holley EFI kept actual AFR between 7.6 and 8.0 for entire run.
Closed loop compensation varied from +2% to -3%.
GoPro video showed oil pressure drop to 20 psi 1 second after launch, stayed there for 4 seconds, then back up to 70 psi.
I added about another quart and it stays between 60 and 80 psi during runs now.
I added fuel pressure and oil pressure senders so I can datalog those now.
Here are a few pictures, 1/8 mile datalog and video links.
1999 block, 2001 rotating assembly, new rings, new bearings, LS2 heads, LS6 intake, ASA cam, stock LS1 throttle body.
Powerglide, 8" 4000 stall converter, Ford 9 inch, 3.70 gears, 33x15 slicks.
Holley EFI fuel pump, Holley 66 lb injectors, E85.
Weighs 1590 lbs with wing, wheelie bars and me sitting in it.
Ran 9.20 @ 141 on first run ever, launching at 3000 rpm and shifting at 6000 rpm, closed loop WOT, 7.8 target AFR (E85), 25 degrees ignition advance.
Holley EFI kept actual AFR between 7.6 and 8.0 for entire run.
Closed loop compensation varied from +2% to -3%.
GoPro video showed oil pressure drop to 20 psi 1 second after launch, stayed there for 4 seconds, then back up to 70 psi.
I added about another quart and it stays between 60 and 80 psi during runs now.
I added fuel pressure and oil pressure senders so I can datalog those now.
Here are a few pictures, 1/8 mile datalog and video links.
Last edited by LT1Altered; Apr 18, 2013 at 07:03 PM.
10 Second Club
Joined: Apr 2013
Posts: 317
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From: Carlinville, IL
Very cool, probably easy to maintain and reliable. We are putting a carbed LQ4 in my son's 65 El Camino for me to drag race. My son is currently working on an LS2 injected/turbo'd on alky for his R.E.D.
Check out his build thread....
https://ls1tech.com/forums/forced-in...-dragster.html
Steve
Check out his build thread....
https://ls1tech.com/forums/forced-in...-dragster.html
Steve
Thread Starter
Teching In
iTrader: (3)
Joined: Sep 2011
Posts: 40
Likes: 1
From: Spartanburg County, SC
Very cool, probably easy to maintain and reliable. We are putting a carbed LQ4 in my son's 65 El Camino for me to drag race. My son is currently working on an LS2 injected/turbo'd on alky for his R.E.D.
Check out his build thread....
https://ls1tech.com/forums/forced-in...-dragster.html
Steve
Check out his build thread....
https://ls1tech.com/forums/forced-in...-dragster.html
Steve
If he decides to try running it naturally aspirated before installing the turbo, I have a very nice set of custom upswept rear engine dragster headers that I'm not using.
And I actually just sold my 65 Chevelle SS to my father. : )
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Joined: Apr 2013
Posts: 317
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From: Carlinville, IL
Looks like a nice clean setup. Do you have any trouble with oil blowing up through your breathers. Our carbed LQ4 has the same valve covers without the breather holes. Joe originally had the motor in his street car (too wicked for the street) with a valley plate breather setup and it drooled quite a bit ay highway speed.
Thread Starter
Teching In
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Joined: Sep 2011
Posts: 40
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From: Spartanburg County, SC
Looks like a nice clean setup. Do you have any trouble with oil blowing up through your breathers. Our carbed LQ4 has the same valve covers without the breather holes. Joe originally had the motor in his street car (too wicked for the street) with a valley plate breather setup and it drooled quite a bit ay highway speed.
10 Second Club
Joined: Apr 2013
Posts: 317
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From: Carlinville, IL
I had that problem, only when racing, and only on the left side valve cover breather at the back side of the engine. I changed to a valve cover without a breather on that side and it's fine now. No oil comes out of the breather on the right side valve cover at the front of the engine, even when racing. I think it was related to high g-force and high oil flow when accelerating at high rpm, the oil was being pumped quickly, was pushed towards the back of the engine, and wasn't draining fast enough, so it started filling up into the breather.
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Thread Starter
Teching In
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Joined: Sep 2011
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From: Spartanburg County, SC
I've only made about 10 runs so far and used those to resolve the oil pressure issue and I changed the shocks a bit so it would stop launching to the right.
Today I'll increase launch and shift rpm and maybe start playing with the timing and air fuel ratio.
Thread Starter
Teching In
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From: Spartanburg County, SC
My heads are bone stock LS2 and I've started out at 24 degrees timing.
I've only made about 10 runs so far and used those to resolve the oil pressure issue and I changed the shocks a bit so it would stop launching to the right.
Today I'll increase launch and shift rpm and maybe start playing with the timing and air fuel ratio.
I've only made about 10 runs so far and used those to resolve the oil pressure issue and I changed the shocks a bit so it would stop launching to the right.
Today I'll increase launch and shift rpm and maybe start playing with the timing and air fuel ratio.
I know it is a bracket car, but it is all about going as fast as you can. lol otherwise, we would all just be racing our beaters dialing in 16.80s
Thread Starter
Teching In
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Joined: Sep 2011
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From: Spartanburg County, SC
with stock heads, you are prolly around 10-1 ish. with e-85 you could put another 7-8 degrees of advance and pick up some hp. these things respond to compression and timing. advance it till it knocks and pull it back a few degrees. do you have the knock sensors in? will the holley hp detect knock?
I know it is a bracket car, but it is all about going as fast as you can. lol otherwise, we would all just be racing our beaters dialing in 16.80s
I know it is a bracket car, but it is all about going as fast as you can. lol otherwise, we would all just be racing our beaters dialing in 16.80s
I'm at 10.66:1 compression ratio.
I'm planning on adding timing to see how the performance changes.
I made a few runs in the 1/8 mile yesterday and the car is launching to the right pretty hard so I'll need to get the suspension figured out first.
I like this thing, would love to have one to play with but it would be hard for me to own anything that I couldn't cruise around town.
Do you have any updates? Did it go any faster? I would imagine you could race this thing practically forever without wearing it out.
Do you have any updates? Did it go any faster? I would imagine you could race this thing practically forever without wearing it out.
Thread Starter
Teching In
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Joined: Sep 2011
Posts: 40
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From: Spartanburg County, SC
But my reaction times aren't good enough so I'll get back to optimizing the tune probably next week.
I haven't raced in about 5 weeks due to weather conditions (RAIN).
The trap speed was getting better as I was leaning out the AFR so I'll continue to lean it out and then go up on the timing.
