Built LS1 performance question
06-28-2012, 10:54 AM
#1
Built LS1 performance question Hey gents,
Sorry for the newb-ish question, I still have a lot of reading and research to do. I'm eventually looking to do an LSx swap on my E36, and wanted to ask you guys what kind of performance / fuel mileage I could expect from a moderately built LS1/T56. My goal is roughly 450hp n/a, while still being practical and streetable. I've found a motor with the lunati 395 stroker kit / mild cam installed, and was wondering if something like this would be worth pursuing.
If anyone has any better/cheaper recommendations for achieving those goals though, I'm all ears. I still have a lot to learn with these motors. I appreciate your help.
-Chuck
Sorry for the newb-ish question, I still have a lot of reading and research to do. I'm eventually looking to do an LSx swap on my E36, and wanted to ask you guys what kind of performance / fuel mileage I could expect from a moderately built LS1/T56. My goal is roughly 450hp n/a, while still being practical and streetable. I've found a motor with the lunati 395 stroker kit / mild cam installed, and was wondering if something like this would be worth pursuing.
If anyone has any better/cheaper recommendations for achieving those goals though, I'm all ears. I still have a lot to learn with these motors. I appreciate your help.
-Chuck
06-28-2012, 12:24 PM
#4
most likely aluminum for the weight savings. not a huge difference but not insignificant. the stroke on the 395 kit is 4.125": http://www.lunatipower.com/Product.aspx?id=379&gid=187
06-28-2012, 03:03 PM
#6
X2 ^^^
You want the compression around 10.5:1 / 11:1 for a N/A moter. Also a 4.125 stroke crank in a ls1 block is pushing the limits. If the machining isn't perfect =
The iron blocks weigh 100-120 pounds more than the aluminum blocks so if weight is a consern go aluminum.
If the extra weight doesnt bother you I would start with the Iron 6.0L block (lq4 or lq9) and bore it .020 over and stick a 4" stroke rotating assemly in there getting you to 408ci. That with a good head/cam package, intake, and long tubes will get you past your 450hp goal N/A.
You want the compression around 10.5:1 / 11:1 for a N/A moter. Also a 4.125 stroke crank in a ls1 block is pushing the limits. If the machining isn't perfect =
The iron blocks weigh 100-120 pounds more than the aluminum blocks so if weight is a consern go aluminum.
If the extra weight doesnt bother you I would start with the Iron 6.0L block (lq4 or lq9) and bore it .020 over and stick a 4" stroke rotating assemly in there getting you to 408ci. That with a good head/cam package, intake, and long tubes will get you past your 450hp goal N/A.
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06-29-2012, 01:15 PM
#10
Originally Posted by JohnJanz@Texas-Speed
Just as an example my 01 Z06 has 450rwhp from a heads/cam 5.7l and I still got 27mpg on my last trip to DFW. Give us a call or send me a PM and I can get you a quote for a similar package as far as heads/cam goes.
Originally Posted by TyCZ28
4.030 is a 408... i have one for sale =] 400 bucks for a fresh block, cam bearings, and an engine stand
thanks for all the replies, gents. i appreciate it.
Last edited by ckpitt55; 06-29-2012 at 01:26 PM.
06-29-2012, 02:49 PM
#11
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I understand it'd be a lot more work, it's just that gas mileage will drop quick on an n/a build. 450 isn't radical so you could probably still get low 20's cruising.
07-01-2012, 01:24 PM
#13
My cars old setup which went 11.20s on the second shake down pass, and was a ~450rw setup, knocked off 24.86 mpg with 4.10s running the a/c and cruise control in hilly mountainous terrain! These cars can still achieve great fuel economy even when modded.
07-02-2012, 02:51 PM
#15
that's what i'm going for. i still plan on dd'ing the car when the weather favors it so maintaining those mpg's is somewhat important to me. i'd probably be running a 3.91 in the rear, not a big difference but might help a bit. how did you like the 4.10?
