Dissapointing Dyno Results!!!
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From: springhill florida
Dissapointing Dyno Results!!! Well took my car down to Rev xtreme on saturday, and was hoping to get some redemption on my last dyno pull of 356rwhp last year with my cam 222/224 566/568 @50 112 seperation, and headers, and exhaust. I installed a set of patriot stage 2 5.3l heads, 1.8 roller rockers, weiand intake, new comp r lifters, chromoly pushrods, ls6 oil pump, and was only able to put down 370rwhp???..... only a 14hp gain from heads, intake, and rockers????...... something must be wrong even though i know patriot inst the best head out there, i have heard of people getting 40rwhp just from their heads....I am at my wits end with this car, seems no matter what i do to it, it just wont get over the 400rwhp mark???.....fed up and plus they told me that the manifold was also robbing me of power bc it is aluminum, and that it was causing a vacum leak and pulling in un-metered air, so it is running lean...... Might switch back to a ls6 intake of fast 78mm, at this point i dont know what i want to do with the car.... 
put on an ls6 intake. those metal intakes by holley/bbk or whoever are waste of moneys and are heat sinks. they rob power. esp if you didnt let it cool down....oh 4-5 hours. maybe longer. you have a good cam and probably decent heads. so it should make 385-400 rwhp through a stock rearend.
i assume its a 6 speed manual car? does it feel much faster?
i assume its a 6 speed manual car? does it feel much faster?
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From: springhill florida
Originally Posted by gator's 99TA
put on an ls6 intake. those metal intakes by holley/bbk or whoever are waste of moneys and are heat sinks. they rob power. esp if you didnt let it cool down....oh 4-5 hours. maybe longer. you have a good cam and probably decent heads. so it should make 385-400 rwhp through a stock rearend.
i assume its a 6 speed manual car? does it feel much faster?
i assume its a 6 speed manual car? does it feel much faster?
It is an automatic, I drove the car there about an hour ride and it mabye had 25 min before they ran it on the dyno. and each pull resulted in less hp. it does feel strong breaks the *** end loose with ease and pulls hard but the dyno doesnt show it...
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From: springhill florida
I am looking into buying a ls6 intake used, or a 78mm fast intake. if anyone has a intake for sale let me know. but also, there are cars with almost exact setups putting down 400-420 rwhp, there cant be a 20+ hp diffrence with the auto's just doesnt seem possible??... i have to get a stall and get it down to the track and see what she will run...
Originally Posted by bigken
Well took my car down to Rev xtreme on saturday, and was hoping to get some redemption on my last dyno pull of 356rwhp last year with my cam 222/224 566/568 @50 112 seperation, and headers, and exhaust. I installed a set of patriot stage 2 5.3l heads, 1.8 roller rockers, weiand intake, new comp r lifters, chromoly pushrods, ls6 oil pump, and was only able to put down 370rwhp???..... only a 14hp gain from heads, intake, and rockers????...... something must be wrong even though i know patriot inst the best head out there, i have heard of people getting 40rwhp just from their heads....I am at my wits end with this car, seems no matter what i do to it, it just wont get over the 400rwhp mark???.....fed up and plus they told me that the manifold was also robbing me of power bc it is aluminum, and that it was causing a vacum leak and pulling in un-metered air, so it is running lean...... Might switch back to a ls6 intake of fast 78mm, at this point i dont know what i want to do with the car....
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From: Gainesville, Florida # of drag strips runs: ?!?!?
Originally Posted by Turo
...and get some timeslips! ET, 60' and trap speed are a great way of measuring your car's real power.
Good luck getting her run, and just to brighten your day a little, my Nova makes 369 rwhp and runs the #s in the sig at 3475 lbs through an auto.
Derek
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From: springhill florida
Originally Posted by gomer
I'm willing to bet that the preload is screwed up with those comp R lifters. Are your rockers adjustable? If not, your Comp R's have too much preload and they are hanging the valves open at high RPMS.
they are slp 1.8 pedestal mount roller rockers non adjustable. I thought there was zero lash so you could just tighten them down??... brought the number one cylinder up to top dead center and then tightened them down by hand, then torqued them to 22ft/lb. I installed them without the shims they came with bc, with them on there was too much play between the rockers and the spring unless there was tension on cylinder some of them moved a lil too freely i felt. so i took out the shims and that went away...still not sure they are right?????
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From: springhill florida
Originally Posted by Tally TransAm
take those shitty rockers off and put the stockers on, your probably getting valve float.
can you post a graph
can you post a graph
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From: springhill florida
I'll see if i can get a graph, i have to go back soon to have them re-set the tranny shift points not happy with them, track has to wait till i have a stall and some sfc's and some suspension components. if i get the graph how do you post it??.... dont know how to post anything on here....
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From: springhill florida
Originally Posted by gomer
The lifters/rockers are your problem. Do a search in the internal section on Comp R lifters. Even if you go back to stock rockers, that won't solve your preload problem.
whats wrong with the comp r lifters??... if i have to change the lifters which means pulling the heads again, i'll just get rid of the car dont have the patience to go through that again
comp r's need adjustable rockers i am not sure about what u said with the slp's getting 0 lash but as far as i know the r's lifters need adjustable rockers period, o and deff get rid of those 1.8, whose cam is that 222/224 u got on there, it looks like that cam was not made for 1.8 rockers, but check with who u bought it. o and i dint see this but do u have any exhaust work done if dont then thats a big reason for the lower numbers??? and like everyone else said get rid of that pos weiand intake.
i have a similar cam to urs a tr 224/224 with a lid and an ls6 intake, mid lenght headers and the stock mufler and y pipe and iam putting down around 390 with pp stg 2 heads, through and m6.
i have a similar cam to urs a tr 224/224 with a lid and an ls6 intake, mid lenght headers and the stock mufler and y pipe and iam putting down around 390 with pp stg 2 heads, through and m6.
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From: springhill florida
Originally Posted by zamboxl
comp r's need adjustable rockers i am not sure about what u said with the slp's getting 0 lash but as far as i know the r's lifters need adjustable rockers period, o and deff get rid of those 1.8, whose cam is that 222/224 u got on there, it looks like that cam was not made for 1.8 rockers, but check with who u bought it. o and i dint see this but do u have any exhaust work done if dont then thats a big reason for the lower numbers??? and like everyone else said get rid of that pos weiand intake.
i have a similar cam to urs a tr 224/224 with a lid and an ls6 intake, mid lenght headers and the stock mufler and y pipe and iam putting down around 390 with pp stg 2 heads, through and m6.
i have a similar cam to urs a tr 224/224 with a lid and an ls6 intake, mid lenght headers and the stock mufler and y pipe and iam putting down around 390 with pp stg 2 heads, through and m6.
Originally Posted by bigken
it is a comp cam 222/224 566/568 lift @50. hooker long tube headers, off-road y pipe flowmaster exhaust, pp stage 2 5.3l heads 2.05 intake, 1.57 exhaust most of all the valve train is comp cams stuff, ie comp cam, lifters, pushrods
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From: springhill florida
Originally Posted by zamboxl
well get rid of those 1.8, tr and comp cams are both cut on the same lobe or something like that so if my 224/224 is no good with 1.8's iam sure urs aint either.
you tried running 1.8's and they didnt work with your setup?.... so you think if i go to a 1.7 roller rocker then it might fix my problem??.. if so, what rocker do you recommend???