BrianC98Z28

iTrader: (11)

i did 374/367 unlocked untuned through a 3800 converter. My buddy did 409 cam only with his 98 with a cam a little smaller than a MS3 I dont remember exact specs. Im going to a new cam and should be close id think with the new setup. Its all in tuning. Who cares about dyno #s as Ill take E.T anyday.

GMTECH4

my question to all you guys with a 98 making all this hp. are you doing it on a stock buttom end? stock block? i have a 98 ss and have read so much bad info about our weak oiling system. from what i see on this thread i'm thinking about going for a h/c swap on my 98 with 117,000 miles on.

JKDZ28

iTrader: (14)

From what I gather, the oiling problem isn't really a major issue unless your spinning SKY HIGH.

I think with a GOOD oil pump and civilalized RPM range (6700 or less), the oiling issue shouldn't be a big deal.

Others that know more about it - feel free to chime in and add / correct those statements.

PS: And yes I think most of the ppl with the 98s making 400rwhp are on the stock rotating assembly/block.

tbird31

iTrader: (22)

my buddy, Ben, HOSS on here, put down 430hp and 393tq on a cam, full bolt on setup. it was pretty wicked. the tune was amazing.

SS4Matt

iTrader: (4)

yes my old setup with "cam only" on my '98 SS are with a stock bottom end, stock rotating assembly. the weak link in the '98's i hear are the rod bolts, when my car was tuned at W2W they spun my car up to 6,850. i've never been concerned about the oil situation, i have either a katech or Thunder Racing oil pump, i forget which lol...that was a long long time ago...i'de have to go through all my reciepts, but my car has never had an oiling issue at all!

JKDZ28

iTrader: (14)

Killer numbers! What cam?

BrianC98Z28

iTrader: (11)

yes mine is stock bottem end... and I also have an ls6 oil pump and mine has seen 6900(rev limiter) on occasion playing around. I have mine shifting at 6500 and comp 918 springs,LS6 Oil Pump, Ls2 timing chain.

B18CYA

iTrader: (17)

stock bottom hear to
but after spraying 100 wet shot for two years i ended up breaking a piston this year.

Quite impressed with these things overall though 600 at the flywheel is pretty damn good with cast pistons and all. I'm sure the spay just took its toll over the years

st30thz4

iTrader: (6)

I built a motor for a friend of mine. It was a 98 Z28 6spd. I put the T-Rex cam in it and long tubes(pacesetters) and tsp duals, Fast intake and throttle body, stock pulley, stock 98 perimiter heads. Stock clutch and rear end gears are stock to 3.42. Tuned car myself with Hp Tuners and it put down 418.63 rwhp

98Z28MASS

iTrader: (6)

Wow the guys hitting 400+rwhp without a t-rex sized cam must have factory freaks or generous dynos because with my 232/238 cam I hit 370 rwhp and thats with ls6 intake/ported tb/25% pulley/mac mids with ory. I would say the norm for a 98, cam only, is sub 400 rwhp. As slowhawk stated earlier and told me in person he hasnt had a 98 headed car hit 400 rwhp and he did my tune and install and he is one of the top tuners out there. Not saying it cant be done but numbers will be different on different dynos. I say go whatever cam you want, the worry about the heads later. If doing them all at once then get either the patriot or prc ls6 heads.

JoeyAnderson

iTrader: (20)

Stock 98 heads, TSP Magic Stick v3 - 405 RWHP thru my Moser 9"

JoeyAnderson

iTrader: (20)

That is a 99 car.

JoeyAnderson

iTrader: (20)

Stock bottom end, stock block - spinning to 7200 with a TSP ported LS6 oil pump.

JoeyAnderson

iTrader: (20)

Thank you for the mention! The car made 421 RWHP cam only thru the stock 10 bolt before I took it out and junked it!

Of course these are SAE corrected dyno numbers, and I'm rowing a 6spd.

JKDZ28

iTrader: (14)

Good lawd! killer numbers bro!

JKDZ28

iTrader: (14)

This includes rod bolts?

JKDZ28

iTrader: (14)

OH YEAH, people who vote yes or no.... please only vote if you have a 98.

We have some voters that don't have 98s that voted "NO".

JoeyAnderson

iTrader: (20)

No, the car has a set of Katech rod bolts in it. Us 98ers are crazy to spin the stock bottom ends past 6500 without an upgraded set of rod bolts!!

JKDZ28

iTrader: (14)

Got ya man, did you install the rod bolts with the motor in the car?

Good to see you have no major oiling issues!

98Z28MASS

iTrader: (6)

I am almost 100% positive that rod bolts can be installed with the engine in the car and are def worth it if you plan to spin the motor past 6500 as JoeyAnderson said. Also id def invest in a ported ls6 oil pump as the 98's are pretty bad and that should help with the oiling issue. Joey at what RPM did your MS3 see peak HP?