jub jub

This question was asked on another forum. I answered no but several so called engine experts said yes. I've been reading posts about these engines for several years and I've never heard of anyone making 425 at the wheels without a new stick or juice.

What do you think? Can it be done and what would it take?

badpewter-z

iTrader: (4)

supercharger would do it no problem
other than that itd be very rare with every bolt on

AdamSS

iTrader: (3)

It's possible....New, better flowing headers (maybe FLP), change to higher ratio rockers (more lift on yor stock cam = more power) Add all the boltons and finish it off with a very good tune. 425 is certainlty doable

J-Rod

Yes, it could be done. As stated, a set of AFR 225's, and full bolt ons. LGM headers, FAST90, Electric WP, etc...

You could see 425. That'd be right around the max you'd see. But it is possible.

Worm

iTrader: (2)

Someone on this forum got 404rwhp with a 02 Z06 and 205cc AFRs and stock manifolds and stock intake. I'd say its definately possible.

98Z28MASS

iTrader: (6)

Im sure its possible, just raise the compression of the engine with the selection of heads, along with long tubes, true duals, fast 90/90, and a real good tune you should be about there.

XTrooper

Possible and pointless.

slowassta

iTrader: (12)

150 shot

~JOSHUA

iTrader: (92)

Why would you kgo through the trouble of doing heads and leave that lil' in there? Wortheless. It flat out doesn't make sense.

98Z28MASS

iTrader: (6)

yea i agree, but he wants to know if it can be done and i guess the answer is yes, but i agree what is the point?

98RedZone

iTrader: (1)

Exactly what I was thinking. Your going to buy $2k heads and run a stock cam?

Casperws6

might not be pointless if he had to pass the snifer

98Z28MASS

iTrader: (6)

true, but you can pass with a cam up to about a 224/224 i believe. I mean if thats his goals, to get 425 rwhp without touching the cam thats cool, just easier ways to do it and still pass sniffer, thats all.

JL ws-6

iTrader: (50)

Yes, it could be done.. and if passing the sniffer, or a very stealthy setup is the goal, then it would definately achieve that.

But, on the other hand, why not have a cam cut with close to stock duration, but a ton of lift, like a cheater cam like te one that thunder sells, or somethign of the like... probably make life alot easier, and alot cheaper.

Hell, of my stock headed bolt on car with a little cam made 403 thru a 12 bolt and HD steel driveshaft... I'd think that a full bolt on car, with heads that were ported with the intent of using a very small cam could get another 20+ hp from what I am making.

jub jub

Interesting. I would have never believed it.

My Z06 made 357/357 stock and after I added LG long tubes w/off road pipes and Halltech stinger intake I made 385/380 w/tune.

Phil'sC5vette

iTrader: (4)

Thats what I was going to say

BlueSix

One word...sleeper. Think how fast a 425 rwhp car would be at a Z06's weight, would you ever expect a car that sounded dead nuts stock to run that number? THrow a 150 wet shot on there and you have a money making machine.

HioSSilver

iTrader: (8)

My ls6 makes 407 rwhp. Since then I have added a mezeir water pump, roller rockers and a throttle body and intake that I made bigger. I'm sure it'll make 420 rwhp when I dyno it again.

WS6FirebirdTA00

iTrader: (33)

damn right, you are telling me if you could have a 425 rwhp car that idled and ran smooth like stock, and was a total sleeper you wouldnt do it? i dont care about a sleeper so its not for me, i like the lope of a big cam

ninobrn99

iTrader: (8)

i may be buying a ls6 block and 243 heads to put in my TA. With full boltons and a 228/228 114 what should i look foward to?