spinmonsters cam LS3
Thread Starter
Racer
Joined: Oct 2005
Posts: 291
Likes: 42
From: CT
spinmonsters cam LS3
Hi everyone, i finally broke down and i'm going to change the stock cam in my 2010 grand sport for the famous spinmonster cam. i ordered the custom specs from Texas Speed for the following and have a question, when i ordered the cam the rep asked me if the lift was at .050 i told him i wasn't sure. never heard of this and he put the below spec. can anyone chime in on that?
230/234 duration at .050
Lobe lift .362/.353 this will be .600/.615 with the 1.7 rocker arms
ICL is 112
LSA is 114 +2
i was going to call Texas Speed back but they are closed now.
just looking to ease my mind.
Thanks
230/234 duration at .050
Lobe lift .362/.353 this will be .600/.615 with the 1.7 rocker arms
ICL is 112
LSA is 114 +2
i was going to call Texas Speed back but they are closed now.
just looking to ease my mind.
Thanks
Melting Slicks
Joined: Feb 2017
Posts: 3,287
Likes: 1,283
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Thread Starter
Racer
Joined: Oct 2005
Posts: 291
Likes: 42
From: CT
he did ask about the duration @.050 which i knew. but then he asked if the lift was at .050 when he asked for the lift #'s. he didn't seem to know a lot when i asked him other questions. anyhow thanks guys. i'm sure it's fine.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
These are the same sales peeps saying, "Those specs make no sense." when people call to order this cam which has so many results showing near 500rwhp cam only.
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Le Mans Master
Joined: Dec 2005
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From: Southeast TX
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
I've ordered several custom cams of my own creation from Cam Motion and they've never questioned anything. Their cams run smooth and quiet and have never disappointed. I do business with Tx Speed, but not for cams. Current cam has .620 lift on both sides and runs with stock (non-upgraded) rocker arms. Over 30K miles on the first set and they looked perfect when I replaced them with another set of stock rocker arms. I'm sure the BTR dual platinum springs that I replaced at the same time had more miles left in them too. To me, a quiet stable valve train is worth a lot. And I do love the sound of an LS3 with open ZR1 mufflers at 7000 rpm
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,684
From: Southeast TX
Hopefully the person who told me something similar about cam motion will chime in but they did it too. All it takes is one person who thinks the success of their company is due to their knowledge. I get it. When you sell your own designs, it hurts when somene calls to order something you didn't create.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Do you have the dyno sheet for that install? I'd be curious where a 225 on a 114+5 starts to drop off in an LS3. A 230 114+2 peaks at 6300rpm. More advance lowers the RPM peak as does less duration. More exhaust duration extends it but not by much. Each degree of advance narrows the power band and lowers the peak by around 50RPM while shifting the power band down for more low end Tq. This is why you bump compression when you use big cams which is more effective at raising power everywhere.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,684
From: Southeast TX
Do you have the dyno sheet for that install? I'd be curious where a 225 on a 114+5 starts to drop off in an LS3. A 230 114+2 peaks at 6300rpm. More advance lowers the RPM peak as does less duration. More exhaust duration extends it but not by much. Each degree of advance narrows the power band and lowers the peak by around 50RPM while shifting the power band down for more low end Tq. This is why you bump compression when you use big cams which is more effective at raising power everywhere.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Raising compression rather than advancing a cam that much, results in a very wide power band with optimized low end Tq.
The stock intake manifold forces the peak at 6300rpm as does a medium length runner FAST so you want to make the cam and manifold peak at the same rpm to optimize efficiency.
Advancing a cam that much, while increasing low end Tq by closing the intake valve sooner, messes up the exhaust valve events.
Thread Starter
Racer
Joined: Oct 2005
Posts: 291
Likes: 42
From: CT
i'm excited to get this cam, i actually ordered two of them. my buddy has a 2010 base also, so i'll be doing the cam in his.
i'm hoping for the typical 480+ RWHP. going to install the ATI balancer as well as pin it for future necessities
i'm hoping for the typical 480+ RWHP. going to install the ATI balancer as well as pin it for future necessities
Melting Slicks
Joined: Feb 2017
Posts: 3,287
Likes: 1,283
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Here you go gentlemen. There are two results on here, one from when I just had headers and a tune(2018), second on Jan 2022 is with the above cam (TSP). Also I’m running an A6.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
It looks like a good daily driver cam.
With a 3200 stall, it would likely run a great 0-60 time.
Are the heads stock?
Last edited by SpinMonster; May 18, 2023 at 03:14 PM.
Melting Slicks
Joined: Feb 2017
Posts: 3,287
Likes: 1,283
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Yes heads are stock and I’m thinking my next upgrade would be heads and converter. Yes great daily driver and wherever I go I get compliments on how it sounds (ARHeaders, hi flow cats x pipe and Corsa extreme) I do have a Soler TB and cai also.