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First dyno results
Why are lines so jagged and the power just drops off. Timing was at 24.5, a/f seems pretty good. how do i improve high end power to about 5800-6k rpm? How are these numbers compared to stock #'s? http://i141.photobucket.com/albums/r...art0106076.jpg
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Originally Posted by Tahoe6.0
Why are lines so jagged and the power just drops off. Timing was at 24.5, a/f seems pretty good. how do i improve high end power to about 5800-6k rpm? http://i141.photobucket.com/albums/r...art0106076.jpg
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all mods are in sig, do you want the full cam card listing? Compresion 10.2:1 Thanks
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You will need a different intake if you want the hp to keep climbing.
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Originally Posted by Tahoe6.0
all mods are in sig, do you want the full cam card listing? Compresion 10.2:1 Thanks
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I do not have headers and i do have 33lb injectors installed that i forgot to mention. My thinking after talking with cam grinder and head guy was that 1400.00 for dynatech and y-pipe with high flow cats was not worth 10-15hp! plus I have had bad luck with headers 30 yrs ago and they were leaking, lose bolts all the time. I will install them if some one can tell me how much I'm losing with them! I'm going to install some cnc ported stage 2 heads and try to have Charlie change a/f and timing a little! Stock truck intake flows 280cfm i'm told and the 280cfm will make more hp than 297rwhp. Ive learned alot from this forum and please correct my old way's thinking! I need to get this figured out soon. It seems to never end!
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The more you do on the intake side, the more that stock manifolds are going to kill your numbers. You don't have to use a $1400 set of headers, buy some pacesetters and y-pipe for 1/3 that price. When you swap out your heads i bet you will see at least 20hp from headers. An LS6 intake would definetly help out your top end power as well.
Were the pushrods in your sig recommended by the cam manufacturer or did you use a pushrod checker to find the length you needed? I just very rarely see any combo that needs something besided a 7.400" pushrod. Also that cam is awfully small for a N/A 6.0 in my opinion. Also, don't let an experience from 30 years ago deter you from doing headers now. Thick flanges and better gaskets, along with locking header bolts will make them worry free. |
Its just a poorly matched setup.
Ive got a similar cam single patterns are designed for use with a good exhaust. Id expect more to the tune of 30-40rwhp from lt's and an open exhaust with no cats. If you want to keep the stock exhaust Id be swapping the cam for an ls6, lpe gt2-3 or the good ole 210/218. The cam doesnt make sense to me. I think the duration and lift is fine but the ve's he's using dont add up. If it were on a 110/110 it would have made alot more power throughtout the rpm range. |
Get v-band clamps welded on and oyu wont have the leaking and bolt problems.
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Originally Posted by adam1803
The more you do on the intake side, the more that stock manifolds are going to kill your numbers. You don't have to use a $1400 set of headers, buy some pacesetters and y-pipe for 1/3 that price. When you swap out your heads i bet you will see at least 20hp from headers. An LS6 intake would definetly help out your top end power as well.
Were the pushrods in your sig recommended by the cam manufacturer or did you use a pushrod checker to find the length you needed? I just very rarely see any combo that needs something besided a 7.400" pushrod. Also that cam is awfully small for a N/A 6.0 in my opinion. Also, don't let an experience from 30 years ago deter you from doing headers now. Thick flanges and better gaskets, along with locking header bolts will make them worry free. |
Originally Posted by 02sierraz71_5.3
Its just a poorly matched setup.
Ive got a similar cam single patterns are designed for use with a good exhaust. Id expect more to the tune of 30-40rwhp from lt's and an open exhaust with no cats. If you want to keep the stock exhaust Id be swapping the cam for an ls6, lpe gt2-3 or the good ole 210/218. The cam doesnt make sense to me. I think the duration and lift is fine but the ve's he's using dont add up. If it were on a 110/110 it would have made alot more power throughtout the rpm range. |
Originally Posted by 02sierraz71_5.3
Its just a poorly matched setup.
Ive got a similar cam single patterns are designed for use with a good exhaust. Id expect more to the tune of 30-40rwhp from lt's and an open exhaust with no cats. If you want to keep the stock exhaust Id be swapping the cam for an ls6, lpe gt2-3 or the good ole 210/218. The cam doesnt make sense to me. I think the duration and lift is fine but the ve's he's using dont add up. If it were on a 110/110 it would have made alot more power throughtout the rpm range. |
Since your going to keep the stock intake and at the most some pacesetter LT's with cats. I would start to think to a small reverse split cam. This is going to help with your poor flowing intake side.
Maybe like a 220/216? You can never go wrong with the 212/218 comp HI lift camp BTW. |
hey i got a header question. Do you really need coated headers or will painted work just as well?
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Originally Posted by Mad_04_chev2004
hey i got a header question. Do you really need coated headers or will painted work just as well?
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Originally Posted by Tahoe6.0
so what would be a nice set up this time? i'm on my 3rd cam , pushrods, valve springs, heads off, 6 tunes and alot of patience lost. Would cnc heads, headers, cat y-pipe be good this time? I have some other cams that might be good to use already with the right match. (I have a New Comp Custom 216/218 .561 .563 114+2) I'm looking for a N/A RWHP about 360-375 tq about the same. Whats a simple set up with whaty I have? With truck intake and 33lb injectors.
Not being an asshole but throwing parts and money at it isnt going to do anything its all about the synergy of the parts. |
Originally Posted by 02sierraz71_5.3
Its just a poorly matched setup.
Ive got a similar cam single patterns are designed for use with a good exhaust. Id expect more to the tune of 30-40rwhp from lt's and an open exhaust with no cats. If you want to keep the stock exhaust Id be swapping the cam for an ls6, lpe gt2-3 or the good ole 210/218. The cam doesnt make sense to me. I think the duration and lift is fine but the ve's he's using dont add up. If it were on a 110/110 it would have made alot more power throughtout the rpm range. |
Originally Posted by Tahoe6.0
Thanks for all your help! what good header / high flow cat setup is good to bolt to a Corsa full exhaust system.? Bassani / kooks / stainless works/ hooker / pacesetter. should I change heads to some cnc ported while i do headers, is it going to help hp/tq enough for the money spent?
The y-pipe is crucial 2.5 to single 3" should be enough just get some U bends and cut/weld em up, Id definately gut whatever cat you put on there to pass inspection. Drop in a cutout after the y if you want works well for track day and got me the extra 1/10 even though my exhaust is completely open dumping it earlier can help with scavenging |
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