http://www.ls1tech.com/forums en Fri, 20 Nov 2009 23:30:35 GMT vBulletin 60 http://images.ibsrv.net/ibsrv/res/src:www.ls1tech.com/get/forums//images/misc/rss.jpg http://www.ls1tech.com/forums http://www.ls1tech.com/forums/generation-iii-internal-engine/1207322-prc-cnc-cylinder-head-decking-video.html Fri, 20 Nov 2009 22:41:26 GMT Thought you guys might like watching the new PRC cnc cylinder head milling setup hard at work! This video shows a couple thou being taken off a LS6 cnc ported head!

This is just another perfect example of how we're always working to create the best possible product for our customers! The finish this setup leaves is absolutely awesome!

Enjoy!

http://www.precisionracecomponents.com/cncmilling.wmv ]]> Generation III Internal Engine Jason 98 TA http://www.ls1tech.com/forums/generation-iii-internal-engine/1207322-prc-cnc-cylinder-head-decking-video.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207310-6-0-questions-cam-swap-etc.html Fri, 20 Nov 2009 21:34:28 GMT I have a 2000 GM half ton truck...how much HP would a stock 6.0 engine make with just a cam swap?...Anything else i would need to know about this swap?..I would like to have a honest 400 rwh but yet be very dependable....Is this setup about the biggest bang for my buck? Thanks in advance I have a 2000 GM half ton truck...how much HP would a stock 6.0 engine make with just a cam swap?...Anything else i would need to know about this swap?..I would like to have a honest 400 rwh but yet be very dependable....Is this setup about the biggest bang for my buck?
Thanks in advance ]]> Generation III Internal Engine raceandwin1 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207310-6-0-questions-cam-swap-etc.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207307-cam-questions-nova-build.html Fri, 20 Nov 2009 21:28:14 GMT Hey guys, I have a 73 nova ss that is currently going thru a complete resto. I have a lq4 short block, 243 heads, ls6 intake, 28pd injectors, 75mm t.b. I will be running a 4l60e with a tci tcu computer. I have 3.73 rears, total weight approx 3200pds. I have the "classic" fast unit for managment. I was thinking of running the gmpp "hot cam." Has anyone used this cam in a street car? Recomendations anyone? Thanks! Ryan ]]> Generation III Internal Engine c20rj http://www.ls1tech.com/forums/generation-iii-internal-engine/1207307-cam-questions-nova-build.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207293-ms4.html Fri, 20 Nov 2009 20:58:53 GMT what pushrods do i need to use when installing an ms4 cam in my ls1? ill be hopefully using my ls6 heads people are telling me i need 7.425 or 7.45s someone help me what pushrods do i need to use when installing an ms4 cam in my ls1? ill be hopefully using my ls6 heads people are telling me i need 7.425 or 7.45s someone help me ]]> Generation III Internal Engine SScamaro4 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207293-ms4.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207242-ptv-clearence-gurus-step-inside.html Fri, 20 Nov 2009 18:38:44 GMT ls1tech is so full of different info on exact specs on this stuff and different formulas on how to find it i cant tell which ones are correct. so maybe someone that has done this before will chime in. the car is a stock ls1 bottom end. cam is .605/.610. duration is 238/242. the heads im looking to... ls1tech is so full of different info on exact specs on this stuff and different formulas on how to find it i cant tell which ones are correct. so maybe someone that has done this before will chime in. the car is a stock ls1 bottom end. cam is .605/.610. duration is 238/242. the heads im looking to get are 5.3 heads with 2.02/1.60 valves and have been milled .030. will these heads cause ptv clearance issues? the gasket is planned to be .040. if they will work but not with that gasket what gasket is recomended? thanks in advance for the help. ]]> Generation III Internal Engine the SS show http://www.ls1tech.com/forums/generation-iii-internal-engine/1207242-ptv-clearence-gurus-step-inside.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207206-enging-removal-questions.html Fri, 20 Nov 2009 16:38:44 GMT (1)Getting everything ready to take the block out through the top, but do not want to mess with pulling the U/D pulley. Is that going to be a problem? Will the machine shop want it removed? I believe it will come out of the bay if I either angle back a bit or possibly rotate 90 deg as I am coming... (1)Getting everything ready to take the block out through the top, but do not want to mess with pulling the U/D pulley. Is that going to be a problem? Will the machine shop want it removed? I believe it will come out of the bay if I either angle back a bit or possibly rotate 90 deg as I am coming out with it.

(2)Leaving the oil pan on....ok?

(3)Leaving the a/c off.... how do I cap the connection under the cowi? The smaller "radiator" is also left off?

(4)When unbolting the engine, do I just remove the long thru bolts in the mounts?

Thanks for the input. ]]> Generation III Internal Engine BLUEBYU http://www.ls1tech.com/forums/generation-iii-internal-engine/1207206-enging-removal-questions.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207176-valve-size-stock-short-block.html Fri, 20 Nov 2009 15:10:25 GMT I have been looking around for another set of heads. It seems like there is alot of good deals for ported heads in the classifieds. What is the largest valve size you can run with a stock short block? I have been looking around for another set of heads. It seems like there is alot of good deals for ported heads in the classifieds. What is the largest valve size you can run with a stock short block? ]]> Generation III Internal Engine TRUCKIN http://www.ls1tech.com/forums/generation-iii-internal-engine/1207176-valve-size-stock-short-block.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207174-5-3-383-a.html Fri, 20 Nov 2009 15:05:20 GMT im wanting to make my 5.3 into a 383 stroker. i know it involves boring it from 96 to 99mm but would this weaken the cylinder walls? because its a boosted motor. im wanting to make my 5.3 into a 383 stroker. i know it involves boring it from 96 to 99mm but would this weaken the cylinder walls? because its a boosted motor. ]]> Generation III Internal Engine 1nasty86 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207174-5-3-383-a.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207171-pre-oil-timing-chain.html Fri, 20 Nov 2009 14:53:54 GMT Do I need to put some fresh oil on the new timing chain before buttoning up the front cover? Just curious if this is good for better wear and start-up? Do I need to put some fresh oil on the new timing chain before buttoning up the front cover? Just curious if this is good for better wear and start-up? ]]> Generation III Internal Engine Titanws6 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207171-pre-oil-timing-chain.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207153-lets-talk-valve-wipe-pattern-also-piston-rings.html Fri, 20 Nov 2009 13:09:26 GMT I know that many spin the engine 7K+ on stock rockers. However, I have noticed that even w/ proper lifter pre-load & pushrod length that the non-adjustable stockers cannot be dialed in as well as a set of adjustable post mounted roller rockers, in terms of valve wipe pattern. Seems like valve guide wear & even the potential for valve float would be increased by the wider valve wipe pattern created by the stockers (stock rockers maybe 3/16" wide & centered, adjustables 1/16" wide & centered). May sound like a redundant question, but have read many, many posts where guys swear by the stock rockers, but never is a comparison made to an adjustable valve wipe pattern or is the need for earlier head rebuilds noted, as a result of using the stock rockers (not that I've found anyway). Comments?


Am replacing the piston rings in my back-up short block. The moly based top ring seems to be more prone to heat damage. What is the preffered file-fit set-up/material or replacement kit for street/road course use? Ductile iron top ring, manufacturer X's ring kit, zero gap rings.....???

Thanks in advance ]]> Generation III Internal Engine LS1-450 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207153-lets-talk-valve-wipe-pattern-also-piston-rings.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207152-when-stock-rockers-not-enough.html Fri, 20 Nov 2009 12:34:05 GMT I am trying to find out when is it a time to upgrade? I plan to be right at 1200rwhp with my 408ci F-1R setup. Have people pushed them that far? If I need them I have no issue getting them I just wanna see what the others are doing and how far they have been pushed. I am trying to find out when is it a time to upgrade? I plan to be right at 1200rwhp with my 408ci F-1R setup. Have people pushed them that far?

If I need them I have no issue getting them I just wanna see what the others are doing and how far they have been pushed. ]]> Generation III Internal Engine 1INSANEGTO http://www.ls1tech.com/forums/generation-iii-internal-engine/1207152-when-stock-rockers-not-enough.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207150-car-wont-rev-passed-6450-rpm.html Fri, 20 Nov 2009 11:46:58 GMT I have been having this issue which I thought was valve springs/valve float. I was for sure it was valve springs when I had them replaced the other day some broken ones were found. I knew the car was down on power but the valve spring swap made night and day difference. I wouldn't hesitate to say the car picked up 5mph. Although they did have a hard 20K miles on them. Problem is still there. In 1st, 2nd, 3rd, 4th, park, neutral anytime the rpm's reach 6450 it will NOT turn anymore rpm's. The pull to 6450 feels great. Car pulls very hard, smooth then instantly quits turning rpm's. It's not a gradual start feeling a miss or cutting out then it gets worse type deal. It's just car pulling hard then wham car quits making rpm's. Also at 6450 when it starts the afr goes rich. It will go from 12.7-12.9 to anywhere from 10.9 to 11.5. My only guess is it's floating the valves on brand new springs OR an ignition issue and both are obviously messing with the burn of the air/fuel mixture.

Keep in mind I had no problem turning the car to high rpm's with the springs before they obviously got old, current pushrods and rockers. The car turned high rpm's months after I fessed up and finnaly bought hp tuners. I have patriot golds, 7.35 pushrods, and comp pro mag rockers also LS7 lifters. I find it really hard to believe I got a bad set of new patriot golds.

Could it be something electrical? Theres no voltage drop in the system, I have checked fuel pressure 60psi at wot, replaced the crank sensor and coil packs thinking maybe the ignition was cutting out up top.

I also questioned the transmission in the car but this not turning any rpm's is happening way before its supposed to shift (6900). It also does it in park and neutral if you bring the rpm's up that high....so I kinda ruled the trans out.

Basically I have to band aid the tune to let the car only turn about 6200 rpm's on a h/c/fast car so it can make a somewhat of a pass on the street....unacceptable. Any ideas? Thanks ]]> Generation III Internal Engine AutomagicLS1 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207150-car-wont-rev-passed-6450-rpm.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207116-whats-better-compression-headflow.html Fri, 20 Nov 2009 05:26:32 GMT I have a 2000 Camaro LS1 motor with stock 853 cylinder heads on it now. I am running the 02-04 LS6 camshaft (.551 lift).
I also have an extra set of LQ4 317 heads available and I was wondering what would make more power?
If I leave the 853"s on I will keep my 10:1 comp ratio. But if I swap to the 317"s I will lose the compression down to around 9.5:1, but gain cyl. head flow as the heads flow the same as the ls6 heads.
There are no immediate plans to boost this engine anytime soon.
Has anyone done this head swap?
How much power do you think I would gain/loose?
Thanks in advance. ]]> Generation III Internal Engine buktooth http://www.ls1tech.com/forums/generation-iii-internal-engine/1207116-whats-better-compression-headflow.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207083-anyone-ever-use-vendor-head-work.html Fri, 20 Nov 2009 03:37:36 GMT LandSpeed Development ...... here is their website http://www.notasponsor.com LandSpeed Development ......

here is their website

http://www.notasponsor.com ]]> Generation III Internal Engine printmanjackson http://www.ls1tech.com/forums/generation-iii-internal-engine/1207083-anyone-ever-use-vendor-head-work.html http://www.ls1tech.com/forums/generation-iii-internal-engine/1207080-cam-change.html Fri, 20 Nov 2009 03:26:59 GMT hey i have a 2002 nhra t/a wit 76k miles on it do i need to change the oil pump and chain for the cam? what do i need for a cam change i know what cam iam getting hey i have a 2002 nhra t/a wit 76k miles on it do i need to change the oil pump and chain for the cam? what do i need for a cam change i know what cam iam getting ]]> Generation III Internal Engine BlackBirdRyder02 http://www.ls1tech.com/forums/generation-iii-internal-engine/1207080-cam-change.html