Mild, driveable cam for 402 but want over 520RWHP
02-24-2008, 08:32 PM
#61
LSGunZ28
Found this thread in the dyno section. Thought you might be interested....
Synergy L92 408 results....new camshaft and the original build L92 408 first results....
Found this thread in the dyno section. Thought you might be interested....
Synergy L92 408 results....new camshaft and the original build L92 408 first results....
02-25-2008, 03:15 PM
#62
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Im still talking to texas speed.
Through pacesetters, but a fast 90/90 with the 5.3 heads and maybe even the Tv3 cam. I can make right about 500whp... far more driveable than before... plus the 5.3 will give me good midrange and low end.. and I can reuse all my valvetrain components
I think I may go this route..... if the Torquer 3 isnt the best choice, thenmaybe a MS4, would still be driveable in a 402, with 11.2 : 1 CR or so I hear..
Through pacesetters, but a fast 90/90 with the 5.3 heads and maybe even the Tv3 cam. I can make right about 500whp... far more driveable than before... plus the 5.3 will give me good midrange and low end.. and I can reuse all my valvetrain components
I think I may go this route..... if the Torquer 3 isnt the best choice, thenmaybe a MS4, would still be driveable in a 402, with 11.2 : 1 CR or so I hear..
02-25-2008, 03:29 PM
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LSGunZ28
Found this thread in the dyno section. Thought you might be interested....
Synergy L92 408 results....new camshaft and the original build L92 408 first results....
Found this thread in the dyno section. Thought you might be interested....
Synergy L92 408 results....new camshaft and the original build L92 408 first results....
slightly better bolt ons, and slightly more cubes... the drivetrain will slightly eat up more HP
cam intake is smaller than mine, but exh is much bigger, but has less lift on both...
I think I can see similar numbers through my heads, maybe not the cam I have at the moment though...
02-25-2008, 04:01 PM
#65
Wow a lot of detailed info here, but way too much crap to sort out.
You want a motor to make 520 rwhp, and make power in a streetable rpm range, if it was my motor and it was N/A I would go way bigger than a 402, something between 427 - 454 cid.
Besides would you rather have a motor make 480 hp @5900 and 600 tq or a motor revving to 6800 making 520hp and 470 tq?
To get the power you want you'll either need to rev it higher or build it bigger. Yes you can easily make 520 rwhp with a 402, but from my understanding you want a stock type power band and just an increase in power.
Which would leave me with two options, build it bigger or build it mild and add the boost later and live with a little less power now.
You want a motor to make 520 rwhp, and make power in a streetable rpm range, if it was my motor and it was N/A I would go way bigger than a 402, something between 427 - 454 cid.
Besides would you rather have a motor make 480 hp @5900 and 600 tq or a motor revving to 6800 making 520hp and 470 tq?
To get the power you want you'll either need to rev it higher or build it bigger. Yes you can easily make 520 rwhp with a 402, but from my understanding you want a stock type power band and just an increase in power.
Which would leave me with two options, build it bigger or build it mild and add the boost later and live with a little less power now.
02-25-2008, 04:55 PM
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Wow a lot of detailed info here, but way too much crap to sort out.
You want a motor to make 520 rwhp, and make power in a streetable rpm range, if it was my motor and it was N/A I would go way bigger than a 402, something between 427 - 454 cid.
Besides would you rather have a motor make 480 hp @5900 and 600 tq or a motor revving to 6800 making 520hp and 470 tq?
To get the power you want you'll either need to rev it higher or build it bigger. Yes you can easily make 520 rwhp with a 402, but from my understanding you want a stock type power band and just an increase in power.
Which would leave me with two options, build it bigger or build it mild and add the boost later and live with a little less power now.
You want a motor to make 520 rwhp, and make power in a streetable rpm range, if it was my motor and it was N/A I would go way bigger than a 402, something between 427 - 454 cid.
Besides would you rather have a motor make 480 hp @5900 and 600 tq or a motor revving to 6800 making 520hp and 470 tq?
To get the power you want you'll either need to rev it higher or build it bigger. Yes you can easily make 520 rwhp with a 402, but from my understanding you want a stock type power band and just an increase in power.
Which would leave me with two options, build it bigger or build it mild and add the boost later and live with a little less power now.
But you missed the main point. The main reason Im going 402 in the first place is because itll cost almost a smuch as rebuilding my 346 or making my LS1 a 383... and since I can salvage the heads and reuse them on the 402, is the only reason Im doing so..
520whp was my original goal, but more important than that was drivability, reliability(which hasnt even een talk abaout yet) and lastly good power, if all I can make is 500whp and not even that with a LS6 manifold and pacesetters, so be it at the moment.. I just wanna get this over with and drive my car already... Im trying to hurry up, but not rush too fast, so I wont make a mistake. the 402 route seems the best money for the buck since I can reuse all my valvetrain, and even my cam if it comes down to that point.
I think I will go with build it milder than my Tv3 LS1 setup, but not as mild as stock... and just improving drivability a little... So yeah Id rather have something mentioned in the middle of what you were saying... Even when I was stock I did rev out til 6900 rpms when making top speed runs
but that was on a stock LS1 cam, which made my peak power at 5600rpms and good power til 6000rpms.
02-25-2008, 06:05 PM
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now lets talk ETs... 
a 3.73 geared moser 12 bolt trutrac, 3400lb car(due to rollcage
) making... lets say a conservative 475rwhp with slicks should be running definitely in the 10s, right? :/
a 3.73 geared moser 12 bolt trutrac, 3400lb car(due to rollcage
) making... lets say a conservative 475rwhp with slicks should be running definitely in the 10s, right? :/
02-26-2008, 08:41 PM
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Ok Im gonna get my 402 soon this week....
along with injectors, maybe another cam, re use all my lifters and pushrods and use my harland sharp rockers or maybe the YT rockers I had on..
what spark plugs should I use? and gap em at what? the TR55s or TR6s?
what kind of injectors, I still have a stocker fuel pump, but its brand new..
along with injectors, maybe another cam, re use all my lifters and pushrods and use my harland sharp rockers or maybe the YT rockers I had on..
what spark plugs should I use? and gap em at what? the TR55s or TR6s?
what kind of injectors, I still have a stocker fuel pump, but its brand new..
02-28-2008, 02:48 PM
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Ok Im gonna get my 402 soon this week....
along with injectors, maybe another cam, re use all my lifters and pushrods and use my harland sharp rockers or maybe the YT rockers I had on..
what spark plugs should I use? and gap em at what? the TR55s or TR6s?
what kind of injectors, I still have a stocker fuel pump, but its brand new..
along with injectors, maybe another cam, re use all my lifters and pushrods and use my harland sharp rockers or maybe the YT rockers I had on..
what spark plugs should I use? and gap em at what? the TR55s or TR6s?
what kind of injectors, I still have a stocker fuel pump, but its brand new..
02-28-2008, 03:43 PM
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Depends on how hard you are going to run it.
I see no problem staying with the LS6 intake (I am still there as the others are not in the budget). I did do a Racetronix pnp pump and 42 lb Lucas injectors. They are less than 55% duty cycle wide open, so you might go a bit with your stocker inj and pump if $ is an issue. If you do that make certain you spend some good time tuning with a fuel pressure gauge on the front of the fuel rail. Only tune with it on. Don't leave it on and drive....Ask me how I know and what miracle it was that the car didn't burn down when the pressure guage loosened itself while driving.
Good Wrenchin,
Perry
I see no problem staying with the LS6 intake (I am still there as the others are not in the budget). I did do a Racetronix pnp pump and 42 lb Lucas injectors. They are less than 55% duty cycle wide open, so you might go a bit with your stocker inj and pump if $ is an issue. If you do that make certain you spend some good time tuning with a fuel pressure gauge on the front of the fuel rail. Only tune with it on. Don't leave it on and drive....Ask me how I know and what miracle it was that the car didn't burn down when the pressure guage loosened itself while driving.
Good Wrenchin,
Perry
02-28-2008, 04:08 PM
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Depends on how hard you are going to run it.
I see no problem staying with the LS6 intake (I am still there as the others are not in the budget). I did do a Racetronix pnp pump and 42 lb Lucas injectors. They are less than 55% duty cycle wide open, so you might go a bit with your stocker inj and pump if $ is an issue. If you do that make certain you spend some good time tuning with a fuel pressure gauge on the front of the fuel rail. Only tune with it on. Don't leave it on and drive....Ask me how I know and what miracle it was that the car didn't burn down when the pressure guage loosened itself while driving.
Good Wrenchin,
Perry
I see no problem staying with the LS6 intake (I am still there as the others are not in the budget). I did do a Racetronix pnp pump and 42 lb Lucas injectors. They are less than 55% duty cycle wide open, so you might go a bit with your stocker inj and pump if $ is an issue. If you do that make certain you spend some good time tuning with a fuel pressure gauge on the front of the fuel rail. Only tune with it on. Don't leave it on and drive....Ask me how I know and what miracle it was that the car didn't burn down when the pressure guage loosened itself while driving.
Good Wrenchin,
Perry
ALso Im a 6 speed.
02-28-2008, 11:01 PM
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can you please chime in, on whats so bad with the stocker? It wont keep up? I mean, Ill change it soon enough, but can it be ran a couple of months with the stocker? It has literally 0 miles on it.. its brand new... Just wondering, if it can be done and if not, what exactly is the reason.
02-28-2008, 11:33 PM
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they dont have burito warmers in them........ but seriously they are not intended to support more volume of fuel than what stock injectors can flow, so..... it will work, and hate you the hole time till it *****, but i wouldnt suggest getting it tuned on a stock pump if you are plannin on upgrading, just asking for the same problems to start all over again, if it is weak and stuggleling to keep up, when you upgrade, and have more fuel.....tune is now off. cut the floor and make it a 15min job.lol
02-29-2008, 02:50 AM
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they dont have burito warmers in them........ but seriously they are not intended to support more volume of fuel than what stock injectors can flow, so..... it will work, and hate you the hole time till it *****, but i wouldnt suggest getting it tuned on a stock pump if you are plannin on upgrading, just asking for the same problems to start all over again, if it is weak and stuggleling to keep up, when you upgrade, and have more fuel.....tune is now off. cut the floor and make it a 15min job.lol
what spark plugs for a 11 - 11.2 cr combustion chamber?
and gapped how?
03-02-2008, 12:53 AM
#77
Think about it like this, your making 1.3 hp per cube, and not happy with driveability. Your current heads can only be marginalized by having to fill a much larger cylinder, its going to need more camshaft naturally to help out. I think there are some things that need to be thought out or re thoughtt out, but doable.
03-02-2008, 05:38 AM
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Lift is irelevant to driveability. Engine only knows when valve opens and shuts in terms of driveability.
Think about it like this, your making 1.3 hp per cube, and not happy with driveability. Your current heads can only be marginalized by having to fill a much larger cylinder, its going to need more camshaft naturally to help out. I think there are some things that need to be thought out or re thoughtt out, but doable.
Think about it like this, your making 1.3 hp per cube, and not happy with driveability. Your current heads can only be marginalized by having to fill a much larger cylinder, its going to need more camshaft naturally to help out. I think there are some things that need to be thought out or re thoughtt out, but doable.
03-02-2008, 09:11 AM
#79
Here it is in a nutshell. When you use the Tv3 and the same heads in a 402, you will make virtually the same rwhp as before, but with 65-70 more rwtq. The airflow of your intake and heads, coupled with the valve events of your cam determine your hp potential. You will make around the same hp but at a lower rpm peak.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
