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L92 heads, stock 6.0 shortblock Tsp 233/239 cam 10.80's

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Old 07-08-2008, 03:20 PM
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A tenth or 2 in the 10's is alot! This isnt 12's or 13s here when you can just do a 5hp mod and gain a tenth or 2! The faster you get the more hp it takes to gain! I am plaining on running a stock 6.0 block with some arp rod bolts and these heads! But I would like to see dyno numbers with what most people use on stock 6.0 blocks. Prc ls6 heads vs prc l92 heads I Bet that would be a crazy gain!
Old 07-08-2008, 03:32 PM
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I don't buy it. Why would anybody go to that much trouble when your going to be putting in an LSX the next day.
Old 07-08-2008, 03:54 PM
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not that much work if everything is out of the way and you are running studs. They probably dont have power steering or anything else i nthe way. Just pull intake off and pull heads off not that bad.
Old 07-08-2008, 05:41 PM
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Thumbs up

I can vouch for picking these stock L92's up 20 cfm with minor port work in the bowls only. Port volume remains similar but the flow gains are appreciable.I would agree gains of .2/10's are reallistic in the car and possibly more with higher peak power target and bigger sized cam timing. I see people spending $1300 for two tenths gains alot on here and other places too, its only ludicrous when you havent exhausted all tuning and other methods of gaining performance with the vehicle itself. I think TSP is a asset to the LS community.
Old 07-08-2008, 06:20 PM
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Originally Posted by MPFD
I don't buy it. Why would anybody go to that much trouble when your going to be putting in an LSX the next day.
my carb'd 6.0 could be out in 30 minutes.... seriously.
its not in a stock cramped 4th gen camaro thats hard to work on.
we are talking about an ocean underhood of a g body.
swapping motors is fun!
Old 07-10-2008, 02:14 AM
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I have cnc'd L92's in my 6.0L and can tell you it makes the same or more than other 6.0L VE/G8's here in OZ with the same cam and mine is a manual.

We are crediting the ported heads with 20-25 HP over the stock heads that were on it before. My car also makes power to 6500 which is higher than the stock heads with the L76 intake.

cheers
Old 07-10-2008, 05:04 PM
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Picking up 2 tenths with just the head swap is pretty cool. My old H/C Camaro (the white one) went 10.92@122.5 last October (= good air) to 10.9@125mph a week ago with a so-so launch and zero seat time for the new owner. I changed the converter which he really didn't take advantage of, and went to a ported FAST 92mm intake over a stock LS2. So 2 tenths from an intake swap is pretty good I think too.

I might buy an 11:1 F-body car that has never really run any good times, and play with it and then try a different cam, and some different heads on it.
Old 11-11-2008, 09:19 AM
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Originally Posted by burgers
Let set the record straight. The car as of June 25, 2008 has a LSX motor with TSP L92 heads. This motor was built the week before to use in the car for Pinks All Out on June 27-28 in St. Louis Mo. The Stock LQ9 low budget motor was put in the car in March of 2008. We ran it at Arkansas city K.S. at Mid America Dragway in April and May of 2008, with the car running a best time of 10.86 @124.32 mph. Matt @ Texas speed and performance contact me and said that he and the guys would like to see what just swaping over to there cnc'd version of the heads would gain. We came to agreement and they hooked me up with a set (which I paid over $1000 for). While they were being shipped the we went racing at M.A.D. and in the first round of eliminations one of the #7 rod bolts let go. Keep in mind that this was a 100% stock LQ9 motor including rod bolts. When the we were picking up the pieces off the track we pick up one of the exhaust valve heads that had made its way out the exhaust. There was damage to the stock heads the camshaft that we had put in for that weekend to try, the block was cracked. Only good parts left was the headers and the manifold. We had 2 other stock LQ9's setting at the shop. We received the heads from TSP, reassemble the motor to the exact specs of the first motor with the exception of the the Tsp heads. We took the car to Kansas International Dragway on June 14, 2008 for a late night test and tune. The Car ran a 10.56 @ 127.37 mph with the only changes being the TSP heads. The following day the motor was pulled out for placement of the LSX which was at the machine shop being deck and bored. As for the two guys talking all the BS the first time I meet either one was on Sat July 5. They pit next to us for the heads up race we had entered. We talked for 4 maybe 5 minutes max, and now they are experts on what has gone on over the last 4-5 months with our car? The problem this weekend was not the motor which is still being broke in, it was the first gear of the trans that let go on the launch of the first pass of the day. We new we did not have a chance of winning but we limped the car to first round. The car has a TH400 and DOES NOT HAVE A TRANS BRAKE. Marty Chance @ Chance converters can verify this. He was in the true 10.5 class with me this weekend and his father Neal Chance is the one that is going to rebuild the trans and install a trans brake for me. But I did launch the car in 2nd and was foot braking it and it pulled the wheels and had a 60ft of 1.53 in first round. We took home a $200 dollar paycheck also not bad for running a broke car.
Very nice of you to explain everything. Good work TSP!

Yea, yea, it's a few months old.
Old 03-23-2011, 08:34 PM
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Does anyone have ACTUAL measurements for P.T.V. clearance using l92's with the texas speed 233/239 cam? I keep reading "piston to valve clearance was fine" or something along those lines, but i cant seem to find any hard measurements. I want to put this cam on my stock lq4 with l92's milled approx. .030 but I hate the idea of guessing on p.t.v. and throwing away 400 bones on a cam.

B.T.W. i think texas speed is awesome, from what i can see they spend A LOT of time on this forum helping people. KUDOS.
Old 03-24-2011, 03:27 PM
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I would like to know as well. I have a bone stock lq4 with dish pistons, I have a good set of L92's that have been milled .030. If I can come up with a really good cam that I don't have to flycut the pistons I would be all over it.

My setup will be a track only if that makes any difference.



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