Cheater cam and underdrive pully.

 

There have been several full bolt on cars do 360rwhp or close, I dont see why a cam'd car with stock manifolds cant do it...just gotta get the right cam...CheatR is your best bet, or have Patrick G or PredatorZ spec you a cam. I think you can easily do it with stock manifolds...but how come you dont wanna do headers? Long tubes are by far one of the best mods you can do to an LS powered Fbody!!

 

He is in Cali

Post #1 in this thread

 

Headers with aftermarket catalytic converters wont keep him emissions legal?? Come on guys, whats the point of making aftermarket catalytic converters if they dont work?? I read his first post, still I ask, "Why dont you wanna have headers and make the power you should with a cam?"

 

if your only gaining 30 hp from a cam something is wrong.

 

No matter what his emmissions are under the sniffer, he can't have headers to pass the visual, I don't think. I don't think you can't move any of the stock parts' locations. I think he can get only shorty headers, and why bother with those.

By the way, nice numbers in your sig... That musta been a bad **** on the street. Ever spray it?

 

You can hit 360HP with bolt ons alone.

My car started with 298HP.

Lid
LS6 Intake
LS7 Clutch + LS2 Flywheel (loss of hp)

306HP

Ported throttle body
QTP Headers
2.5 Inch True Duals with x-pipe over axles
Cats (loss of hp)
Mufflers (I'm going for loss compared to bullets)
Tune
17x11 ZR1 Rims 315 Tires (more weight = loss of power)

349HP

If I added the underpulley, remove cats, have a LS1 or LS6 style clutch, gone bullets or used the stock 16 inch rims + tires, that'd easily account for 10hp+.

You'd pretty much still be within emissions, unless you live in Cali in which the longtubes are a writeoff...

Also of note 98-00 manifolds are CRAP. They can't flow for beans compared to the 01-02. Shorties will gain for him. The 98-02 uses a shorty style on the driver's side I think, and on the passenger side uses a LOG style. I know there are shorty headers for LS1 car that have CARB stickers on them, they will still be an improvement and keep him legal.

 

Thanks for the info sladex How much do you think i could gain with shorties on my 99? I can get some for 100 shipped or so. That would be a good buy?


And yes with california even if you have cats and longtubes and it passes the sniffer better then the stock manifolds and cats it is still illegal cause you have moved the cats from their origional location.

 

Ls6 Intake + shorties will put you in line with the 01-02 factory freaks. I've seen as high as 335HP on the dyno with a m6, and 305-325hp with auto.

An emissions friendly cam as mentioned by Predator-Z for stock manifolds or shorties will probably get you into that target range as long as you have the LS6 intake. The LS1 intake will choke a bit and rob as much as 15-20HP over the whole curve. Toss in the U/D pulley and ported throttle body and I think you can pull it off. You may also consider aftermarket cats and possibly true duals as well. I think cali emissions doesn't care what happens AFTER the cats anyways. At least that was the case for my car back in 01, dunno of any changes since I left there. To keep it passable, you'll need to run it out the back though, so consider the BMR panhard relocation kit to get the pipes over the axle.

You will need a tune to keep it emissions passable.

 

see my sig. I'm in cali, have small *** cam, smog legal bolt ons, and made 368/392

 

My TA made 441hp with stock manifolds and no cam. All you need is a maggie.

 

ya but i do not have the extra money for that otherwise i would go boosted but even with a used setup and a tune it will cost me 3,500+

so my list needs to be:
cam
springs
pushrods
ls6 intake
shorties
duals maybe or good everything behind the headers (best legal system) maybe removable cats, maybe.
p&p throttle body
free mods
underdrive pulley
Dyno tune

 

Just make sure you choose a cam with a pretty large split, I am no cam expert but I would say at least 10deg more exhaust dur than intake. Just as shown in the chetr cam specs, you will need a big exhaust duration to band aid the poor flow in the exhaust.

 

^ i agree. My cam, being a 218/224 really did well for only having shortys and stock cats...

 

Ahhh, I see. We dont have those laws in Kentucky. Yeah, I ran around with a hundred shot on the street. I attempted to spray 200 twice on the dyno and the first time, the guy driving the car, they wouldnt let me, hit the spray at 2000 rpms and it starting blowing the tires off on they dyno and he had to end the run...at 80mph, it was making over 475 rwhp on that run, but he let out at like 82 b/c it was spinning. On that run though, it fouled up my plugs b/c he hit the nitrous way too early. We told him not to hit it until 3500rpms, but he didnt pay attention I guess. He was lucky he didnt tear up my motor. the next run we tried right after that run and the bottle didnt have any pressure left...like 150 psi...so we didnt get much out of it. The bottle was empty and no one else there had any left. I wish I could have gotten some nitorus numbers before I sold that car. It was nasty when I got everything lined out. I sold it to another member on the board here...he loves the car.

 

We just finished a cam and UD on a 99 Vette, made 353. The cam is so mild, we didnt change the valve springs, and it doesnt even lope. Hell, the customer drove it untuned for 2 days with zero driveability problems and no CEL.
As for gains, we started at 318, so we gained 33 hp. With even a slightly more aggressive cam, we could have run right by 360.

 

This is what I would recommend:

214/228 .595/.588 115+2 LSA

-6>IVO
40>IVC
51>EVO
-3>EVC
117>ECL
-9* Overlap

This is a custom XFI/XE-R Comp cam lobes, very tame, will work on PP duals, no headers needed, 700 idle, pass any emmision test, peak around 6000rpm good till 64/6500

 

that seems cool and cost effective, thanks i will strongly consider that


thanks for the specs i will consider that also, i have time to think about what i want to do and that is usually the best. But i will strongly consider that i always liked the custom idea over an off the shelf cam.

 

216/220 .561/.530 113+3lsa..you can run PAC or Comp beehives,and won't have to rev it to the moon to make power..-8 degrees overlap will give you a mild lope,kick the idle up it will sound like a stocker..

 

I would go bolt ons first. Then when you put a came in your looking at 400 hp.