supercoolsix

is 400 rwhp possible w/ just BOLT ONS?? no heads, and cams....
if so, what are they... full exhaust? thermostat? and most importantly, tune..

LS1LT1

IMO no, not with what I would call a safe tune that is done to make the car perform well on the track and not just on the dyno.
You can get very close though with long tubes headers (with high flow cats or even better, no cats at all), cold air intake, thermostat and proper tuning.
A ported stock, or better yet a FAST, intake will help as well.
This applies only to the manual C6s, autos will be nearly impossible to safely get higher than the 380s.
C6 Z06s don't count either of course.

zippin zee

I think it is possible on a strong six speed car.
1.ported intake and throttle body,
2.headers and exhaust,
3.pulley,
4.tuneing,
5.1.85 rocker arms.
6.fresh air intake
At 8 hp per mod it would get you there and I know several of the mods are worth more than 8 hp.

65vetteC6

yes i would have to say it is. My 05 6 speed, with headers, hiflo cats, corsa, varram, and throttle body spacer is making 370. It has a very light tune, just had the mixtures changed a little bit. Plan to go back for the full tune, ad get 5-10 more. Fast intake would help, as would the pully as stated.

vette-oholic

rockers arms are considered bolt-ons?

zippin zee

They are a much easier mod than headers and cheaper too. The slp 1.85's will pass for stock too as they look just like the stockers. I think a strong dynoing stocker will do it without the rockers but why not go for the gusto.

Zig

sure, just bolt on some nox, or a supercharger, or a rocket engine, or a....

yes, i believe it's completely possible with just bolt-ons,

i'm more or less gonna try to see what i get as i mod with the following;

cold-air ram-air highflow air intake
aftermarket intake coupler
polished maf
aftermarket maf screen
highflow cats.
x-pipe
cat-back (bullets)
exhaust wrap back half of x and catback (help reduce pressure further back in the exhaust flow)

in progess of getting the headers hoked up.

lt headers (kooks, jethot coated)

my next round of mods. will be,

hi-output coils&wires / increased spark gap
170 thermostat
electric waterpump
higher ratio rockers and springs

then i'd try,

ported and polished intake (fast)
ported and polished heads (larger valves)
cam (aggressive but docile)
thinner head gasket (increase compression ratio)

then

stroker crank and rods (teflon coated)
teflon coat cam and rockers


i always try to run high octane fuel and a quality engine cleaner (bg44k, lucas) every couple of tanks.

tjd113

Just had my C6, M5 done at Vette Docs. last week, Dyno Tuned at 379 RWHP, I have Super Max Headers, hight Flow cats, X pipe, Borla's, Vararam, 160.

I will be adding Ported Manifold and TB in the next week or so I hope to get 10 more out of that, so look at 389/390 RWHP

andreas g.

With the typical stuff and a 224/228/581/588 cam I made 410rwhp/380
rwtq, add the fast 90 intake went to 425/405. Add 215 ET heads jumped to 461/435. That's where I'm at now. Car runs great. My feelings are you need a cam to get over 400rwhp.

bunk22

On a dynojet, on a 91 octane tune, my car made a best of 396/383 SAE with long-tubes, 1.85 rockers, cat-back, Halltech and tune. The rockers are probably iffy as a bolt-on but I still have stock internals. I think on a more aggressive tune, ie 93 octane, the car might hit 400rwhp. I'm adding a ported intake on Thursday and might tune for 93 octane as well being that I'm moving to Florida at the end of this month.

dennis50nj

with an auto i think maybe with what i have and ported intake under drive pulleys a cold day. with rockers for shore

Waveblaster785

Rockers are NOT a bolt on, you have to remove the valve covers, that completely negates it being a bolt on.

Haven't you ever heard "Valve covers have never been removed, it's a bolt on car"??

C7GrandSport

That's cheating

zippin zee

I believe what the people are wanting here are non complicated mods. We are not setting up a class. There is nothing legal or illegal here just just mods that could be easily reversed if you wanted to. I am just stating what could be done to acheive 400 rwhp with out getting into the heads, cam, or compression of the engine.

Abomination

I have the following mods on a 2006 MN6 vette

Electric water pump
160 degree therm
Kooks headers (jet hot coated)
MDS coil replacements
New plugs and wires
High flow cats
Corsa sports
Vararam intake
Custom made air bride
lingenfelter 100mm MAF
Port and polished Throttle body
port and polished factory intake
(both by jeremy)

That got me to 386 rwhp

I then added a fast intake, that got me to 390

Both with a good tune.

I will say with true bolt ons 400rwhp on a great stock car is possible but its very expensive.

The only other true bolt on I didnt do was underdrive pulley. I decided to go with a cam and am waiting for that setup first.

I wouldnt reccomend trying what I have done again tho.

Zig

try the rockers, bet you nail it. what gap are you running ? imo, 160 is too cool, i'd try a 170 therm. x-pipe or factory h ?

dennis50nj

so then your saying nos is a bolt on. goes on easy and off easy

Abomination

160 is perfect, I'm in las vegas and with the electric water pump, water wetter and the 160 I'm never above 200 degrees and never below 185.

And again, I don't consider rockers bolt on. Plus I plan on achieving my lift goals with the cam selection, so no need for rockers.

Not to mention I didnt actually go in for a goal of 400rwhp, I just wanted to tune what I had already done knowing I was putting head/cam in. I will assume if I took a more agressive tune (tuned for 91 octane) and/or put on the underdrive pulled I would be there.

The kicker is most people (myself included) consider bolt ons because of the inital lower cost. short of long tube headers its not worth it imho. If I went heads/cam in the begining I would have more hp than I do now and be about 2000 bucks heavier in my pocket.

zippin zee

Its easier on and of than a blower or a turbo. But I believe they are power adders.

dennis50nj