When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So I've had an LS2 block sitting in my garage for a couple of years now, and I just stumbled on a 4" crank for a good price near me. My plans are to do HDPE and track days with my C5, and I'm curious the longevity I'd see with a 4" stroke, and if it's even a good idea. Thoughts?
Stroker kits result in more torque in the low rev range, but the engine's ability to reach high revs will be hindered due to the increased travel in the piston's movement, meaning a stroker kit can decrease the responsiveness of an engine.
With running on track, you will spend most of your time 3500+RPM.
It's not that you can't do it, it's just not the favorable set up.
The 2 biggest things with a stroker is the increase in crankcase pressure. and the longer stroke sends the crank deeper into the oil pan which can aerate the oil. The Autocross and Roadrace section has had some stroker topics.
The LS1/6 was the most reliable of the C5 or C6 motors in SCCA T1 or T2. The LS2 and LS3 crankcase ventilation was not as good which is a reason why the GS and C6Z have a quasi dry sump. If you have a healthy LS1 or LS6, I'd swap the cam and maybe heads if you want more power. Spend the extra money on suspension and track time.
The 2 biggest things with a stroker is the increase in crankcase pressure. and the longer stroke sends the crank deeper into the oil pan which can aerate the oil. The Autocross and Roadrace section has had some stroker topics.
The LS1/6 was the most reliable of the C5 or C6 motors in SCCA T1 or T2. The LS2 and LS3 crankcase ventilation was not as good which is REASON why the GS and C6Z have a quasi dry sump. If you have a healthy LS1 or LS6, I'd swap the cam and maybe heads if you want more power. Spend the extra money on suspension and track time.
So this is definitely something I'd be doing far into the future, I definitely want better suspension and more seat time before I start trying to add power. If I do eventually go bigger power, I fully plan on doing it right (hence why I'm here asking questions). In this particular case, I was planning to eventually sleeve the LS2 block so I could bore it to 4.185. Would a vacuum pump alleviate the ventilation issues the LS2 and 3 had?
So this is definitely something I'd be doing far into the future, I definitely want better suspension and more seat time before I start trying to add power. If I do eventually go bigger power, I fully plan on doing it right (hence why I'm here asking questions). In this particular case, I was planning to eventually sleeve the LS2 block so I could bore it to 4.185. Would a vacuum pump alleviate the ventilation issues the LS2 and 3 had?
IMO, I would go dry sump.
Also not sure why a word ended up in caps, must have hit the caps button by accident. Edited the original post to fix it.
Interesting. I would think that if the heads and valvetrain were able to feed it the air being demanded that a stroker would still rev as quickly. Further than the right cam and head spec would see the same RPM capacity. I'm in this for new knowledge if any - keep it going.
I have spent 14 years, 28 days on road course tracks, Buttonwillow Raceway, Laguna Seca and now in Arizona, Arizona Motorsports Park, 2011 to the present. Most recent was April 20. My LS has a programmed on purpose rev limit of 5,800 rpm to keep it alive for 14 years and 10,000 wide open throttle upshifts from 2nd to 3rd (it is an A-4).
Lower end torque got my 23 year old C5 past the new yellow Ferrari three times on the 20th. I like lower end torque for road course tracks- like a stroker would provide. My car on far left.
I drive with my age as the car number. Started at 66.
Stroker engine for road race?
