I just bought a Six speed 2000 C5 and need to consult the Gods in this forum for the recommended mods. The car already has a Halltech intake, headers, catback, full exhaust (no cats). I used to own a Rx7 and a Toyota Supra, so i am no stranger to modding cars but this is my first NA Car...

I want a mainly street car that can run high 11s. Can i reach this with bolt ons?

Here are a few mods I was entertaining

- 4.10 diff
- LS6 or BBK Intake manifold
- SCT or Vararam Tuner
- Throttle body . which?

I like the idea of superchargers but looking for a cheaper option.

 

Jan

The BBK intake manifold is all Aluminum. It will heat soak as the motor gets hot. Your better off with composite LS6 manifold, or a composite FAST 102 or 92. You need a different throttle body all together with the FAST intakes. I however would not get into an intake manifold just yet. I would also hold off on the Throttle body at this point also.

The 410 gears is always a good idea.

Before I chose to break "into" my motor I did the following.....

I have the Vararam and am very happy with mine.

I would also look into a power duct.
http://www.westcoastcorvette.com/p-1...-04-c5z06.aspx


Full length headers is something you should do early on.
I have the LG Pro Long Tube headers and love them. They create a sound that's amazing. They run from the motor all the way back to your cat back exhaust.


Look into Cat back exhausts next. I have the GHL Bullets, and I sure wish I bought these first. I had multiple other exhausts, and the GHL Bullets are by far the best I have had on my car. Deep sounding and no drone. Best of both worlds! There is some good engineering behind these. Its tough to find a NEW exhaust for $850 that is any good. Best bang for the buck here.
http://forums.corvetteforum.com/c5-z...like-them.html
http://forums.corvetteforum.com/c5-g...l-exhaust.html


Next go to a tuner and get a GOOD dyno tune once the above mods are complete.

Once the above is complete, and you want more.... Start looking into either Heads/Cam setups, or Super charging, or Turbo charging.

This is basically the path I took. I later chose to go with Heads/Cam. I chose a Blower cam just in case I wanted to get a Super charger later on though...

Good luck with your choices !
Toque

 

Intake, cam, and tune would be a great starting point. Free flowing filter and a full length header with large primary tubes and 4-2-1 collectors would be great supporting mods to a cam and intake. And as already said, 4.10 gears are always a good idea.


The BBK and heat-soak concern is non-existent. Heat-soak is an issue with carb motors. The intake “soaks up” heat after shut down and when it is stated again the fuel hits the hot intake and affects the delivery.
The LS1 is obviously a fuel injected car and does not have this issue.
People also think that the intake will be hot and cause the intake air to be hot as well affecting performance, but I have not seen this as a concern. If you feel your LS1 intake after a long drive, it will be hot too. It’s not like it stays cool just because it plastic.
After a long drive I will pop the hood and place my hand on the intake, and so far I have never been burned nor has it felt unreasonably hot.
Another concern people have stated is that the warmer intake will heat the fuel cross-over tube and thereby increasing the fuel temp or causing vapor-lock. Well, the fuel tube has always been cold, not cool or warm, but cold to the touch after a long drive.

The LS6 intake is obviously a great intake, but if you are thinking about a BBK, please don’t be put off by those who haven’t used them.
Also, the aluminum will be a great choice if you decide to boost your motor. It can be ported and port matched as well.

For me though, in addition to the performance aspect, I also really liked the look of the intake.

Throttle body is not a bad idea, but probably not needed unless you do a cam swap or something that increases the high rpm demands.

If you do not want to turbo or super-charge your engine, then you will at least want to do a cam swap. Even a mild 22x @.050” cam can yield 50hp or more.

 

a cam will get you there easily. my old setup was good for mid/low 11's with a decent tire.

SI5 cam from speed inc
Kooks long tube headers
FAST 92 intake with a ported LS2 throttle body

 

lt headers, x pipe with or without convertors, cam and a tune.

 

Well, if you're not doing a big cam or heads, any intake other than an LS6 is not required, and would show only very minor improvement for a lot of bucks.
But, that being said, you already have the major bolt-ons, so a cam and good tune is definitely the next step for you. Doing a cam on these cars is fairly labor-intensive, but only due to the need to move the steering rack around. The actual engine work is pretty simple, and does not require removing the heads. Keep it reasonable and the valve train will be bullet-proof with just a spring upgrade. Right at 400 RWHP is easily obtainable with a very reliable/docile engine that has never had the heads off. Then get 3.90 gears and stock up on tires.

DG

 

I all ready have a halltech intake. Should i swap it for a vararam intake? do i belive da hype?
biggger maf sensor?

 

Find a used LS6 intake manifold and ship it to TPIS (4255 Creek Road, Chaska, MN 55318 P: 952.448.6021) to have it modified to accept a 90mm throttle body for $350. The GM LS2 90mm TB works great and can also be found used in excellent condition for a great price!

 

Ls6 heads are a dime a dozen and would make your new cam proud. Just try and do most labor yourself or an AA installed at $7K would get you 100 or so ponnies and cost about the same.

 

Blower

 

what about nitrous oxide? i have seen the nitrous express wet kits are popular. What about the MAF Nitrous express kits? Are they worth it? I have seen people using any where from 75-250hp shots on stock engines. I am a virgin when it comes to the laughing gas ...so please chime in

 

Your stock engine will handle a 100hp shot no problem. Heads/Cam/Headers is the best mod you can do IMO.

I am running trick flow heads, 228/228 112ls cam and 125 shot of nitrous.

The nice thing about doing a cam is you can do other things while you are in there for cheap ( oil pump, double timing chain, bearings, lifters, push rods, underdrive pulley, rockers, etc) as I did.

Most of these things do not yield much extra power, but give piece of mind.

 

The cam idea is beggining to grow on me. I like the lopey sound, but don't a car that is not liveable on the street. What would be a nice street cam? How much hp can be expected? Swapping an ls6 intake, do I need to change injectors? Rails? Anything? Does the manifold bolt right in?

 

I have a set if you are interested.

 

A set of what? Ls6 intake+cam? Just intake?

 

A set of what? Ls6 intake+cam? Just intake? Pm details, price

 

Assuming you already have LTs, a cam change is the most effective power boost, other than NO2. 4.10s are nice, and a kick in the pants, but worthless if you go with a power adder later. If you want to just change the cam now, you can do other stuff later. However, you should know that it's a major install, and you really should change out your timing chain, and balancer at the same time. Optional are better pushrods, and oil pump. Lifters, and rocker arms are kind of weak points, but you don't have to change these. Doing just a cam, (not heads) you won't even be able to access the lifters. Cam choice depends on your gear choice, as well as other mods you project doing soon. Answering your question, you don't need to upgrade injectors, or fuel rails, and yes, the manifold bolts in. You just have to change the PCV system, and get water block offs for the rear crossover tube.

 

I like a 224/230 cam. 113 or 114. From what I read is a nice street cam, mild idle, may yield 40-50rwhp. LS6 Intake, with the coolant lines. Already bought a diablosport. hoping to break 400rwhp with my bolt ons (Halltech AIC, Headers, Catback). After that Heads or Nitro.

Any input on this cam?