TSP Stage 4 LS3 235/248 .649"/.615" Camshaft - LS1TECH - Camaro and Firebird Forum Discussion



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TSP Stage 4 LS3 235/248 .649"/.615" Camshaft

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Old 02-22-2017, 03:18 PM   #1
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Default TSP Stage 4 LS3 235/248 .649"/.615" Camshaft

Has anyone tried this Texas Speed camshaft?

235/248 .649"/.615"

It says that it's new, but I'm not sure how long it's been available. I would love to hear about it, but can't find anyone who has one.

https://www.texas-speed.com/p-5768-n...-camshaft.aspx
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Old 02-22-2017, 07:13 PM   #3
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Here is our engine dyno graph for that cam. This is in an L99, which is down about 10hp from what we normally see in an LS3. It has engine dyno headers but otherwise it's stock.
Thanks for chiming in. How long has this cam been available, and have any been sold yet? Have you received any feedback? In a 6.0 with the same compression as an L99, what should I expect?
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Old 02-23-2017, 01:18 PM   #4
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Bump for info on this cam. Anyone?
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Old 03-08-2017, 11:40 PM   #5
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in for info also, i may just pull the trigger on this for my pig
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Old 03-09-2017, 03:16 PM   #6
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All I can say is that this will be a rather rowdy cam for a stock displacement LS3.

About 19.5* overlap with 111* LSA....to....13.5* for overlap 114* LSA.

Should have LOTS of top end power!

KW
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Old 03-20-2017, 03:28 PM   #7
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Has anyone ever installed this cam?
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Old 03-23-2017, 10:04 PM   #8
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I just ordered this cam will post dyno, but has anyone installed this cam yet?
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Old 03-24-2017, 09:02 AM   #9
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I just ordered this cam will post dyno, but has anyone installed this cam yet?
Nice, what are you putting it in? Any idea when you'll have numbers?
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Old 05-11-2017, 04:38 PM   #10
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What heads were on the LS3 test engine?
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Old 05-12-2017, 01:03 PM   #11
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I have this cam in my miata. It's got a pretty wicked powerband and behaves decently on the street. I cruise at around 1600rpm @ 60mph and there's no bucking, if I drop down to around 50 in 6th it'll start to buck a little (sorry, don't know the rpm and I'm sure some of that can get tuned out). I should be able to get it to idle lower but I'm still working on the tune so it's idling around 1000rpm right now.

I think this video has it idling a touch higher than that but you get the idea.


I still have my throttle stop set at around 70% and this was my first day driving the car so I was still learning the roll onto the throttle technique but here's it a little more opened up.



I wanted more top end power than low end since this car will be mostly used on the track (yes I'm putting a cage in it) and it already has traction issues, so for me this cam fulfilled those goals. As long as I roll into it in second I've got a good amount of traction.
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Old 05-12-2017, 07:21 PM   #12
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That car sounds good! Did you measure piston to valve?
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Old 05-13-2017, 07:38 PM   #13
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I did check them, however it went in after I rebuilt the engine so it had mahle pistons with valve reliefs. Since the cam was designed for stock pistons I had plenty of room, but I'm sure with a stock engine it'd be pretty damn close. Don't have any numbers because it was such a massive distance I didn't really need to worry.

And thanks!
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Old 05-15-2017, 11:09 AM   #14
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On the 114 (assuming +3) it would be a very nice cam in a mild 416 with ported LS3 heads.
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Old 05-15-2017, 11:02 PM   #15
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I just installed this cam in a virgin, 6,500 mile 6.0L L77. The block has never been decked and the heads have never been milled. I'm the first person to ever disassemble the engine. I measured 0.031" PTV on the intake and 0.045" on the exhaust. I used a solid lifter, an adjustable push rod set to zero lash, checker springs, and measured valve drop with a dial indicator.
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Old 05-16-2017, 07:10 AM   #16
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I am always scratching my head when I read about cams like this. What do the manufacturers use as a baseline for determining if the cam will fit in your engine without hitting the valves? If they are advertising this as a LS3 cam, should it not fit in a bone stock LS3 without modifications (except to the rocker trunions and springs for the extra lift)? If it does not fit in a stock engine, shouldn't they state this so you know you have to check it under all circumstances?
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Old 05-16-2017, 08:24 AM   #17
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Saying a cam is for a certain engine does not always mean it's a "drop-in" cam, meaning nothing else needs doing. Its lift spec would indicate whether or not you need different valve springs(as you mention), meaning you should know which springs you already have. NO stock springs will handle a .600 lift cam, for example. Also check your valve to piston clearance if the heads have been milled very much, and/or there's a lot of overlap in the cam. Rocker trunnions are just a good idea anyway, in my opinion.
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Old 05-16-2017, 08:31 AM   #18
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Quote:
Originally Posted by G Atsma View Post
Saying a cam is for a certain engine does not always mean it's a "drop-in" cam, meaning nothing else needs doing. Its lift spec would indicate whether or not you need different valve springs(as you mention), meaning you should know which springs you already have. NO stock springs will handle a .600 lift cam, for example. Also check your valve to piston clearance if the heads have been milled very much, and/or there's a lot of overlap in the cam. Rocker trunnions are just a good idea anyway, in my opinion.
Of course, that's pretty basic information that pretty much anyone here knows. The concern is PTV, and this cam is advertised as having "adequate piston-to-valve clearance on a stock short-block."

Last edited by NEstyle; 05-16-2017 at 08:41 AM.
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Old 05-16-2017, 03:10 PM   #19
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We've measured the 235/248 at .050 PTV clearance for the intake on a stock LS3. I've yet to see anyone have any hitting issues even buzzing 7k RPM. It's completely a drop in cam for an LS3 and has been used a ton already. If it's a completely stock setup, there has to be an issue with the measurement. Did you clay this?

Last edited by [email protected]; 05-16-2017 at 03:21 PM.
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Old 05-16-2017, 03:16 PM   #20
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What were the measurements?
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