 914 LS1 engine conversion |
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| 914rat |
 Jul 26 2006, 11:20 AM
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#1
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Member  Group: Members Posts: 279 Joined: 3-July 06 From: Maryland Member No.: 6,362  |
Is there a way to detune an LS1 to under 300HP and 300#ft of torque so it will work with a 901 trans?Or is it not worth the effort?Since it is almost 100 lbs lighter than a cast iron block I thought it might be a viable option.
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| Aaron Cox |
Jul 26 2006, 11:23 AM
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#2
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
stepup to a 930 4 speed inverted box.....
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| cobra94563 |
Jul 26 2006, 11:26 AM
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#3
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Chris Group: Members Posts: 341 Joined: 1-March 05 From: San Francisco Member No.: 3,696 |
skinny tires?
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| LvSteveH |
Jul 26 2006, 12:03 PM
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#4
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I put the Poor in Porsche Group: Members Posts: 1,080 Joined: 22-April 03 From: Las Vegas, Nevada Member No.: 600 |
There is no reason to detune an LS1 for 901 use. The manner in which your right foot engages the throttle, and your left foot releases the clutch will dictate how long the trans will last in pretty much any application. If you have an engine that can break the trans if you dump the clutch... then don't dump the clutch. Narrow tires are also a good way to shed trans breaking horsepower. Plus, it's always fun to spin tires.
LS1's are getting cheap enough that it would be interesting to see one hooked up to a 901. You would need to do a tall 5th like the H gear to make it highway friendly. |
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| 914rat |
Jul 26 2006, 12:48 PM
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#5
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Member Group: Members Posts: 279 Joined: 3-July 06 From: Maryland Member No.: 6,362 |
QUOTE(LvSteveH @ Jul 26 2006, 11:03 AM)  There is no reason to detune an LS1 for 901 use. The manner in which your right foot engages the throttle, and your left foot releases the clutch will dictate how long the trans will last in pretty much any application. If you have an engine that can break the trans if you dump the clutch... then don't dump the clutch. Narrow tires are also a good way to shed trans breaking horsepower. Plus, it's always fun to spin tires. LS1's are getting cheap enough that it would be interesting to see one hooked up to a 901. You would need to do a tall 5th like the H gear to make it highway friendly. Just had to respond to your addiction references.I have 6 914's in various stages of restoration.I know its not enough to win but it's a good start.My wife made me stop at 4 at home ,I have 2 more at work that I told her belonged to someone else hee,hee. |
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| andys |
Jul 26 2006, 01:40 PM
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#6
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None 
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I know of two such conversions that utilize the 901, but I don't believe they are completed just yet. The LS1 is rated at 330lb-ft, so it's pretty close already. How you drive it will determine how long the transaxle will last.
Andys |
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| turboman808 |
Jul 26 2006, 01:48 PM
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#7
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Advanced Member Group: Members Posts: 2,718 Joined: 31-January 06 From: North Jersey Member No.: 5,505 Region Association: North East States |
Yeah I realized 6000 rpm drops on slicks is not good for cars.
If ya are gonna show off like that put the skinny all seasons on. (IMG:style_emoticons/default/biggrin.gif) |
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| Rand |
Jul 26 2006, 02:27 PM
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#8
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
QUOTE Is there a way to detune an LS1 to under 300HP and 300#ft of torque so it will work with a 901 trans?Or is it not worth the effort?Since it is almost 100 lbs lighter than a cast iron block I thought it might be a viable option. Renegade was offering a modified LS1, detuned - or should I say retuned. Less torque. |
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| itlynstalyn |
Feb 17 2011, 06:41 PM
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#9
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Newbie Group: Members Posts: 1 Joined: 13-February 11 From: Los Angeles, CA Member No.: 12,708 Region Association: None |
Bumping this because I'm curious if anyone has done it recently and has info.
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| Mike Bellis |
Feb 17 2011, 07:25 PM
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#10
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Resident Electrician Group: Members Posts: 8,346 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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I think TurboWalt is doing an LS1 conversion from a SBC. His car is at McMarks shop. Walt is going with an Audi 6spd if I recall. Should be an awesome ride when done.
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| computers4kids |
Feb 17 2011, 08:18 PM
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#11
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
QUOTE(kg6dxn @ Feb 17 2011, 05:25 PM) I think TurboWalt is doing an LS1 conversion from a SBC. (IMG:style_emoticons/default/agree.gif) |
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| jmmotorsports |
Feb 17 2011, 08:52 PM
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#12
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Member Group: Members Posts: 308 Joined: 15-August 06 From: Kelso,Wa. Member No.: 6,658 Region Association: Pacific Northwest |
I am replacing the 350 in my V8 now with an LS1. The LS1 is rated at 345 hp and 350 torque. It is about the same as the SBC I am taking out. The 901 has been in there for 6 years I don't see any reason it won't last another 6 years.
Jerry |
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| 914junkie |
Feb 18 2011, 01:34 AM
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#13
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Member Group: Members Posts: 167 Joined: 14-December 08 Member No.: 9,848 Region Association: None |
QUOTE(914rat @ Jul 26 2006, 09:20 AM) Is there a way to detune an LS1 to under 300HP and 300#ft of torque so it will work with a 901 trans?Or is it not worth the effort?Since it is almost 100 lbs lighter than a cast iron block I thought it might be a viable option. I thought LS1's were over 200lbs lighter than an iron block? (IMG:style_emoticons/default/confused24.gif) Something like 420lbs vs 700lbs. Which would be awesome because my car weighs 2350 now. I'd love to find out what 2100 and another 100HP would feel like! I agree with the others on the 901 holding up just fine as long as you don't abuse it. Ive been running mine with wide tires for about four years now with no problems. Mmmmmm...LS1 (IMG:style_emoticons/default/drooley.gif) |
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| computers4kids |
Feb 18 2011, 08:21 AM
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#14
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
So if you already have a SBC renegade system in your car, just what is involved in switching to an LS1? In other words, what can you keep/modify and what do you need to buy....or is it pretty much starting over in the engine compartment?
And...is it really worth it. Jerry, you obviously have a well sorted 350...so why make the change? |
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| jmmotorsports |
Feb 18 2011, 08:52 AM
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#15
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Member Group: Members Posts: 308 Joined: 15-August 06 From: Kelso,Wa. Member No.: 6,658 Region Association: Pacific Northwest |
QUOTE(computers4kids @ Feb 18 2011, 06:21 AM) So if you already have a SBC renegade system in your car, just what is involved in switching to an LS1? In other words, what can you keep/modify and what do you need to buy....or is it pretty much starting over in the engine compartment? And...is it really worth it. Jerry, you obviously have a well sorted 350...so why make the change? It is pretty much starting over. The only parts I used from the SBC conversion is the motor mount bar and the transmission set back mounts. The LS1 dose not fit any where near as good as an SBC. And it is not a cheap conversion. My reason for the change was to lose the 110 pounds,and gain modern ignition and fuel injection. My car should be running again in about a week so will see if it was worth the effort or not. Jerry |
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| andys |
Feb 18 2011, 10:59 AM
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#16
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None
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TurboWalt is not using the 901 transaxle; he's using the Audi 01e 6 speed, as am I. The reason I went with the LS1 was for the modern electronics and lighter weight. The PCM controls the radiator fans both for temp, and when the car reaches 35MPH it will shut the fans off. Controls the AC as well. Turn the key and it fires right now!
The original poster asked about LS1 torque. Two ways to deal with that; de-stroke an LS1 by using the 4.8 crank and rods (what Renegade did), or consider the aluminum L33 5.3L which makes 310HP. Andys |
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| jmmotorsports |
Feb 18 2011, 01:13 PM
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#17
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Member Group: Members Posts: 308 Joined: 15-August 06 From: Kelso,Wa. Member No.: 6,658 Region Association: Pacific Northwest |
QUOTE(914junkie @ Feb 17 2011, 11:34 PM) QUOTE(914rat @ Jul 26 2006, 09:20 AM) Is there a way to detune an LS1 to under 300HP and 300#ft of torque so it will work with a 901 trans?Or is it not worth the effort?Since it is almost 100 lbs lighter than a cast iron block I thought it might be a viable option. I thought LS1's were over 200lbs lighter than an iron block? (IMG:style_emoticons/default/confused24.gif) Something like 420lbs vs 700lbs. Which would be awesome because my car weighs 2350 now. I'd love to find out what 2100 and another 100HP would feel like! I agree with the others on the 901 holding up just fine as long as you don't abuse it. Ive been running mine with wide tires for about four years now with no problems. Mmmmmm...LS1 (IMG:style_emoticons/default/drooley.gif) GM Performance Parts lists a 350 HO Turn key engine at 575 lbs. They list a 2004 ZO6 Corvette engine at 464 lbs. Jerry |
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| jimkelly |
Feb 18 2011, 02:24 PM
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#18
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
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| marks914 |
Feb 18 2011, 09:14 PM
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#19
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Senior Member Group: Members Posts: 845 Joined: 9-October 04 From: the motor city Member No.: 2,912 Region Association: None |
You should be fine as long as you drive the car respectfully. I have been driving my SBC car for over 8 years and 40,000 miles with a 901. 425 HP and 380ish lb-ft.
Mark |
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