parkers Z28

ok drove the car to work today at a roll if i mat it it seems to kick in
around 2100 rpm so i don't think its stock so think it time to get a
cam but i don't want to have to port the heads so what cam or is
the cam swap without porting a waste of money

HardcoreRM125

Doing a cam without heads isn't always a bad idea. RPM's tend to kill LT1's. And there arent many heads & cam packages out there that have you shifting before 6500RPM's ...

If you want your stock bottom to last, a small cam to medium cam is your best bet, shifted under 6500RPM's.

From what I have seen personally ... as well as what (2) experienced LT1 builders have told me - the loss'es dont justify the gains with stock heads to run much more than an aggressive 224/230. By aggressive, I mean tight LSA (110 or less), and high lift (.580+). Bottom end torque starts to dive with anything much bigger, and the heads don't flow well enough to let the engine breathe up top like a cam like that would need.

So if you wanted it spec'd out, I would be looking for something similar to this:

224/230, 108LSA, .600/.600.

Anything more than that, on stock heads, just is not worth it. Too much trade off for too little of a gain.

parkers Z28

should i also get a bigger throttle body

96capricemgr

If it is indeed about 2100 that would be a restalled stock converter not an actual performance converter and I would still start by putting a GOOD stall in the car. Even the quick bolton cars run over 3000stall. I know that sounds high but converter have come a LONG LONG ways. Back when my car was a 20K mile a year daily driver I had a ZZ4 cam 3.42s and a 2800stall Edge in it, drove like stock at low speeds, only "woke up" when you asked it too.

ACE1252

Don't worry about changing the stock throttle body. It can support quite a bit of hp before it becomes a restriction. Aftermarket ones seem to have problems with spilt fuel trims as well.

parkers Z28

this is what thinking from reading all looks like i will need to buy a stall
around 2500 a small to medium cam roller rockers springs a tune and the
stock throttle body should be ok and as far as the rr 1.5 or 1.6
and for my Sig/tags ? new member i will see what i can do

96capricemgr

I would discourage a 2500 stall and suggest 2800+ in a quality 9.5" unit.

If you must do a low stall like that at least get it from someone like Vigilante or Edge, they both offer 12" converters up to about 24-2500rpm but really if looking to cam it you should be going higher, the stock cam likes more stall than that.

parkers Z28

how about the roller rockers why does everyone go with the
1.6 instead of 1.5.??? going with such a high stall i worry about
ripping out the transmission is a high stall going to be safe??
my main goal is to make the car have that hot rod feel

NJ-LE

parkers Z28:
"how about the roller rockers why does everyone go with the
1.6 instead of 1.5.???"
Along with the gain from the rocker bearings, it's as though you installed a cam that has 6.67% more lift than stock. The raw numbers begin to approach the specs for the factory cam from the LT4.

96capricemgr

Why don't you come back and ask questions once your knowledge level and ideas are a bit more current than the 80s and you are ready to listen to those of us who have put together fast street cars.
If you look at who has posted several guys have already given up trying to help you because you are not listening.

parkers Z28

yes my knowledge is limited and i take in all the post to build my knowledge
that is why i'm on here in the first place the only stupid question is the one not
asked !! is this not how you learned

by trade I'm in sheet metal fabrication not engine building!! thanks to all the nice
people on here for there help my knowledge level my get to your standard

This is what i will have installed thanks to the help i got from all the good
people here. springs 1.6 roller rockers 2800 stall are bigger and a tune

does anyone know what this setup should run in 1/8 with the mods
that i already have. the mod list is #7

Orr89rocz

Most run 1.6 rockers to get the lift up if the combination needs lift. Depends on the cam lobe. My hyd roller has .600 lift with 1.5's. I didnt really need to go 1.6's but I did since my new combination is max effort turbo and has the heads and cubes to make use of it. Some lobes are .500" with 1.5's and need 1.6's to make some power to get an increase in valve lift curve area. Stock heads I dont think need alot of lift and theres more spring choices available with the lower lift levels. As mentioned previously, something like a 224 deg cam on a 108-110 lsa would be about "best" for stock heads for combination of increased power without as much loss of lowend. Something in the mid 500's lift would be what I'd run with a good double spring or PAC 1218/1219 beehive depending on how fast the cam lobe is.

may be a mild stall already, in the 2200-2400 range as most cars will "start to kick in" abit below the advertised stall point. It could be a S10/Corvette converter too as they are a tad higher than stock, 2000-2200 I think. Not 100% sure.

Mild cam will drive ok with low stall but as mentioned, theres ALOT to be gained in a higher stall rpm on those combos. Torque curve will really kick in at 3500 rpm+ so a 3000 stall should be considered. I daily drive a 3200 stall 99 TA and its awesome. Not overly large but definately not small. Good performance. If you go custom you can tell the converter guy you'd like 3000-3200 stall but want it to act very tight while normally driving. They can configure the internals to do so to some degree.

Have you ran it before? Last post said faster than 79-81 mph is your goal so i took that to mean you ran around those times already?

On street tires, traction limited it will go mid 8's 1/8 mile on good day. Maybe high 8's. Traction cured with drag radials, it should go lower 8's IMO with just exhaust mods and gears/mild stall.

My stock auto 2.73 99 ls1 car went 8.8's at 83mph I believe on street tires. Thats not to far off from what a bolt on LT1 should do and actually bolt on LT1 may be abit faster..i know my buddy's car was. He went 12.9's at 106.9 on street tires with all the bolt ons / tune/ 3.73's stock tranny/stock stall! My car with stall/headers/catback/tune/drag radials 3.73's in perfect air went 7.7's at 87-88 I believe it was.

parkers Z28

Wild my knowledge level had to go up 10 points just then thanks nice!!
some of the stuff you guys know. blows me away
looking through some of the other post i have seen on here
how. about a transmission cooler is that something that i need
with the higher stall

dzltek

It wouldn't hurt to have an aftermarket cooler, but it should have one built into the radiator. Most automatic vehicles do. Usually on the passenger side of the radiator. I've been keeping an eye on this thread and I've got a long way to go before a cam is even considered.

parkers Z28

yea its been very helpful to me what I'm starting to see is if you want to go fast
you gotta spend the big bucks . nice to get the help from the pro's that know
instead of the help from the guy at the speed shop that is just trying to sell you
what he makes the
most commission on