LSA blower build
I'm not opposed to changing them myself. I know I could do it. It was more on the fact it felt silly to buy brand new heads with aftermarket springs and then have to buy another set. I have a ton of more parts to buy so the $300 ish for new springs would be nice for other stuff.
This will be in a daily and the one or two times i would take it to the strip. I'm not gonna be spinning it past 6500 at all. The springs in the summit heads are pac dual springs so if people think I'll be okay with those and the .600 lift cam then I'll run it. I always go on the side of caution and overbuild so that's why I was concerned.
This will be in a daily and the one or two times i would take it to the strip. I'm not gonna be spinning it past 6500 at all. The springs in the summit heads are pac dual springs so if people think I'll be okay with those and the .600 lift cam then I'll run it. I always go on the side of caution and overbuild so that's why I was concerned.
For a daily and reliability, I'd prefer something with lower lift and soft lobes to extend valve spring life.
Hit up Pat G., BTR, Baker Cams, etc.
I'm sure they can recommend something that will fit since you're buying a cam anyways.
Speaking from experience with the LSA blower you are going to be below 4k RPMs nearly all the time. I probably spend most of my time between 1500 and 3k rpms lol. Hardly a harsh valvetrain environment.
Checked out those ebay cylinder heads and they look good. Would have to change valve springs too on those. I took a look at AFR heads and they are nice as well, but again only use .600 lift springs. I know it's not a huge deal but just annoying if I'm buying brand new assembled heads, I'd have to change out the springs. Seems like no one offers them with .650 springs, atleast in the "budget category". Not looking to spend $1800 on cylinder heads.
I may wait till black Friday deals roll around and see if i can save. Really want to run the ghost cam and don't feel comfortable running a .600 of lift on .600 springs. Seems like a bad idea, unless it's fine?
I may wait till black Friday deals roll around and see if i can save. Really want to run the ghost cam and don't feel comfortable running a .600 of lift on .600 springs. Seems like a bad idea, unless it's fine?
Andrew
I'd be making that LSA blower make that glorious whine all the time.
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Thank you for tagging us, @Project GatTagO.
OP,
Our private brand team is reviewing the details regarding the heads and springs. We will provide an update next week. We'll come back with some cam options at the same time.
Stay tuned
OP,
Our private brand team is reviewing the details regarding the heads and springs. We will provide an update next week. We'll come back with some cam options at the same time.
Stay tuned
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Joined: Jun 2011
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Thread Starter
Teching In
Joined: Mar 2020
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Heads are in really good shape but I wouldn't feel right if I didn't send them to my machine shop for some cleanup work.
What brand lifters are people using? Seems like every single one has mixed reviews nowadays
What brand lifters are people using? Seems like every single one has mixed reviews nowadays
TECH Senior Member
Joined: Jul 2009
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I agree, you don't need a huge cam to make really good power. I built a stock 6.2 L92, stock 823 heads, Summit 8715 stage 1 ghost cam, stock CTSV lower balancer, and 2.5 upper pulley. I was also on 1 3/4" shorty headers, but it made about 11 psi on that combo. The rest was stock and I made 633 whp and 619 tq. Made 500 wtq at 3k rpm's and like Andrew said, that combo just ripped.
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Hey Folks,
Sorry for the delayed reply. We see the OP scored a good deal on a set of 823 heads but we wanted to update the community on the springs on our heads. Our Private Brand team pulled a set of SUM-162LS3255REC Precision Cast LS heads off the shelf and inspected the springs. The heads have a 1.800" installed height and the springs coil bind at 1.070". We are calling .660" the max lift number (.070" out of coil bind) in case someone has a rocker with a slight overage in ratio tolerance (very common). We confirmed the three cathedral port heads SUM-162LS210CATH, SUM-LS210CATH64,and SUM-LS210CATH60 all have the same .660" lift springs. Our website will be updated to show .660" is the max lift for the springs.
Sorry for the delayed reply. We see the OP scored a good deal on a set of 823 heads but we wanted to update the community on the springs on our heads. Our Private Brand team pulled a set of SUM-162LS3255REC Precision Cast LS heads off the shelf and inspected the springs. The heads have a 1.800" installed height and the springs coil bind at 1.070". We are calling .660" the max lift number (.070" out of coil bind) in case someone has a rocker with a slight overage in ratio tolerance (very common). We confirmed the three cathedral port heads SUM-162LS210CATH, SUM-LS210CATH64,and SUM-LS210CATH60 all have the same .660" lift springs. Our website will be updated to show .660" is the max lift for the springs.
What makes you think they're bad?
Stock GM valves are very reliable for 100s of thousands of miles.
The only time I've seen them damaged is from physical damage or when heads have sat open with water getting in the ports.
Definitely other things to spend money on IMO.
Stock GM valves are very reliable for 100s of thousands of miles.
The only time I've seen them damaged is from physical damage or when heads have sat open with water getting in the ports.
Definitely other things to spend money on IMO.
Thread Starter
Teching In
Joined: Mar 2020
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They have some surface rust from sitting and I just thought it was cheap insurance to get all new parts.
Thread Starter
Teching In
Joined: Mar 2020
Posts: 36
Likes: 12
Anybody run this belt drive setup or have any input on it? Can't really find much info about it. I need to source a drive and the would rather get an upgraded style vs the OEM.
https://www.crossmembers.com/product...43815810072830
https://www.crossmembers.com/product...43815810072830
Anybody run this belt drive setup or have any input on it? Can't really find much info about it. I need to source a drive and the would rather get an upgraded style vs the OEM.
https://www.crossmembers.com/product...43815810072830
https://www.crossmembers.com/product...43815810072830
Andrew