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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 04-02-2009, 06:54 PM   #1
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500 hp with no cam?

is it possible with headers exhaust intake and programmer?
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Old 04-02-2009, 07:06 PM   #2
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Just off the top of my head, I would say no.

You'll free up a couple horses with a higher flowing inhale and exhaust,
but not 75 of them with just that.
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Old 04-02-2009, 07:08 PM   #3
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Headers, exhaust, and a CAI are typically good for about 30-35hp. A computer tune would help out too, but I still think you'd be a good bit shy of the 500hp mark.
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Old 04-02-2009, 07:24 PM   #4
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stock cam.... full bolt ons. cnc'd heads... maaaaaaaaaaaaaaaaaaaaaaaaaybe. it would take a bit to get all of 500. this is at the crank right?

tho 500 is easy.... with nitrous or a super/turbo charger
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Old 04-02-2009, 08:15 PM   #5
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It will likely be possible full bolt-ons to achieve 500 HP @ the CRANK, but that is a whole different ballgame vs 500 RWHP.

LT headers, catless mid pipes, cutouts, CAI, pulley, Tune.

For the guys's not too concerned about warranty, adding heads, cam and FASTLSXR intake will put you at or over 500RWHP...or so it has been done on LS3 Vettes...
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Old 04-02-2009, 08:20 PM   #6
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A full exhaust from somebody like ARH will net you 35HP at the rear, so lets say 40HP at the crank. You could do an intake manifold for 10, a Cold air for a couple, and an underdrive pulley for 10.
426
+35
+10
+10

Is a flywheel total of 481. If you did heads you would make it.
Add a ported throttle body and you coudl hit 485 Flywheel HP
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Old 04-02-2009, 10:50 PM   #7
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No, no cam no 500 HP
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Old 04-03-2009, 01:06 AM   #8
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My manual vette's LS1 boltons (LG Motorsport LT headers, x-pipe (w/o cats), Corsa Cat-back, Vararam Intake, reprogram) were good for 58 RWHP, which is about 68hp at the crank figuring 15% loss

The manual SS which was dyno'd ended up with 364rwhp which equates to about 14.5% loss from the 426 crank hp. The LS3 would probably respond even better to the same type of mods than the LS1, but even if it were a similar 58RWHP that's 422 hp to the wheels. w/ 14.5% loss that would put you at about 493hp at the crank. So IMO I think there could be plenty of people seeing close to 500hp at the crank w/o a cam.
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Old 04-03-2009, 02:02 AM   #9
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wy not just cam it?
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Old 04-03-2009, 09:11 AM   #10
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Quote:
Originally Posted by jordan 572 View Post
is it possible with headers exhaust intake and programmer?
I'm assuming that you don't want to pull the engine, just bolt ons, correct? If thats the case, you'll never quite know how much power you have at the crank anyway. To know you have 500 hp at the crank, you need an engine dyno -which requires removing the engine. At any rate, you won't be disappointed if you make 'only' 490 at the crank vs the 500 you're aiming for. Besides, if anyone asks you'd still be able to say 'it makes about 500 at the crank'
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Old 04-03-2009, 09:15 AM   #11
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bolt on as these should get you 415-420rwhp
headers
pulley
cai
tune

if you need 500rwhp without a cam you will need an sc or a 75 shot of gas will get you there
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Old 04-03-2009, 11:35 AM   #12
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Quote:
Originally Posted by jordan 572 View Post
is it possible with headers exhaust intake and programmer?
Why no cam?

It's doable if you swap out the LS3 for an LS7. Otherwise, I just don't see how you would get to 500 rwhp just with the above.
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Old 04-03-2009, 11:37 AM   #13
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dont cams give ur a weird powerband and only that full power at a certain rpm
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Old 04-03-2009, 11:38 AM   #14
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i meant 500 at the crank i know 500 at the wheel would barely be possibly if i got a cam and all the parts i listed
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Old 04-03-2009, 11:44 AM   #15
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dont cams give ur a weird powerband and only that full power at a certain rpm
It depends on the CAM profile. There are cams out there that can improve power accross the band .. then there are more aggressive cams that may improve more in the higher RPM range and even require a bump in the limiter to get the full benifit of it ...

to the OP .. I don't think with just those items you can get 500 crank HP ..

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Old 04-03-2009, 11:44 AM   #16
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dont cams give ur a weird powerband and only that full power at a certain rpm
No. A mild cam would give you moderate (but considerable) gains across a very wide part of your powerband. A more... intense cam would give you more pronounced gains but only at higher RPMs.
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Old 04-03-2009, 11:47 AM   #17
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It already has a nice cam. How else do you think they get 400 bones?

Just a point to say it's not like an older gen GM V8 where you have all this room to mod up. If it was it would not be at the 400 mark already.
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Old 04-03-2009, 04:06 PM   #18
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I don't know about that comment. I used to think the same until I saw how well the LS3 Vettes are resonding to bolt-ons and tuning. I'm looking to forward to G8-GXP results to confirm that the LS3 has a lot of potential. I'm even more curious to see what variable timing will do for the L99 (since I'll have one of those clutchless dogs).
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Old 04-03-2009, 04:09 PM   #19
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It already has a nice cam. How else do you think they get 400 bones?

Just a point to say it's not like an older gen GM V8 where you have all this room to mod up. If it was it would not be at the 400 mark already.
It also has an extra half litre over what most people are used to.
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Old 04-03-2009, 05:00 PM   #20
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Who cares about the HP rating. Your not going to pull up to someone at a light and compare dyno charts.

I want my car to sound as close to stock as possible yet run in the 11's.

I figure just throw on a supercharger with all the bolt on mods you listed, change the rear to 4:10's and retune the car (up your rev limiter).

Also, a good stripe package should shave off a few tenths.
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Old 04-03-2009, 05:19 PM   #21
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The LS3 engines in the GXP are picking up 40 rwhp with just CAI and tune. That would put the SS (manual) at 470 crank. Exhaust added another 10, and headers should get you at least 20, so I say its possible on the SS (manual). I don't think so for the auto.
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Old 04-03-2009, 05:39 PM   #22
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what do you think about A set of 1.85 roller rockers with your set up?
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Old 04-03-2009, 05:42 PM   #23
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yeah i seen 20 hp with a intake probally a bit fudged but also 30 rwhp with headers and exhaust so what wold that be at crank 40 and 40 hp with a tune 40 plus 40 plus lets just say 10 intake = 90 hp that would be a total of 516 with the ls3 amd just say 15 hp is fudged so there is 500 hp?
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Old 04-03-2009, 09:21 PM   #24
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I had intake, headers, exhaust, and a tune on my 98 SS and I got about 80 crank hp out of it. At the time, I used a G-Tech, and I have to say that it worked pretty good. I tested the car when it was stock and it turned out 320hp on the meter - I had to run it a few times as I was skeptical. After the mods - I ran it again and it hit 400hp. Not sure what everyone thinks about the G-Tech but to me it seemed pretty cool. I of course weighed the car and did all that stuff that I was supposed to. Anyone else used one?
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Old 04-04-2009, 02:55 AM   #25
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I had intake, headers, exhaust, and a tune on my 98 SS and I got about 80 crank hp out of it. At the time, I used a G-Tech, and I have to say that it worked pretty good. I tested the car when it was stock and it turned out 320hp on the meter - I had to run it a few times as I was skeptical. After the mods - I ran it again and it hit 400hp. Not sure what everyone thinks about the G-Tech but to me it seemed pretty cool. I of course weighed the car and did all that stuff that I was supposed to. Anyone else used one?
I'm a fan of GTechs. I have one, I gained ~2.5 mph at the track by changing my shiftpoints based on the gtech.
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