alright guys, i need to know what i can expect from my car. it is an 89 camaro weighs right at 3300lbs with me in it.
305 bored .030 over (310)
cast replacement pistons for 305 h.o. (9.5:1cr?)
ohio crankshaft forged rods
cast crank
416 casting heads with fresh valve job (stock runners)
edelbrock torkerII intake (a dual plaine is in the future)
holley 600 dual feed v.s. 4 bbl
crane blue racer cam .442"in .465" ex 280/290 (214/224 @.050)
crane energizer rocker arms 1.5:1 ratio
heddman longtubes, true duals with moroso spiral muffs
700r4 tranny and a 3.73 posi out back and a 28" tall tire
i am thinking mid 13's. am i being to optomistic?

 

Yes.

 

i'd tend to agree

 

i will 3rd that opinion.

i would say a mid 14 is more liekly to occur.

 

well, i guess the reason i said that is cause my dad run 14.5 with the old lg4 bottom end,that cam listed, heads that need a valved job and a dual plaine intake, the heddmen shorties running through a dynomax catback, a powerglide and 3.23 gears. and i have heard l69's running high 13's with intake and exhaust mods. and i am going with the l69 piston. and my cam is bigger then a l69 and i have better gears.

 

you have the same gears as a L69.
that intake is really not ideal for a mild 305....maybe if you had a bigger cam and 5-speed or higher stall convertor for the auto.

hows the traction situation?

 

14.5 with an 8.6:1 LG4 bottom end? are you sure about that? is this naturally aspirated? thats sounds roughly a second (or at least 8 tenths) too quick.

 

yes, i am possitive.(n/a even) i could pull out the time slips but i don't know where my dad keeps em all. this was close to 2 1/2 years ago. it ran a best of .ike 14.489 or something like that.

traction looks like stock suspension right now and i didn't even think about that. i am going to put the in the jegster lca's, a spohn t/a and some kinda adjustable pan hard rod.

i know that the intake is not that great, but it's what i got, and it gets the car moving. (it's from an old race car we just sold) i have a street dominator intake as well but it is for the post-86 heads. i would much rather just buy a new one anyhow.

 

well, i must say, 14.4 or 14.5 on a 8.6:1 compression LG4 with the mods you listed is amazing...

 

yeah, so, is mid/high 13's too optimistic?

 

well 15 minutes ago i would have said yes its optimistic...but now my world is in complete dissarray so i really dont know what to say.

put it this way...i have a 350 with a bigger cam, 461 heads, a 2700 stall, and a posi with 4.11s and no traction

it ran 13.8 before before the posi/4.11s

i hope to get a consistant 13.6 with the new mods

if your 305, with the mods you listed in your first post, runs faster than my 350 i may have blow up my car.

 

well, for some reason or another, my dad has the great ability to make simple things go fast. the 85 has a 355 with 462 casting heads (stock runners and a 1.94/1.50 valve) 10.25:1 compression, torker II cam. street dominator intake, same exhaust as i, holley 750 dp with the proform main body, a power glide with a 1.82:1 first gear and a 4.56 full spooled 9" out back. the car has runa a best of 12.50

 

wow...thats pretty impressive. he must be getting these cars to hook like a bastard.

 

yeah, he's been around for a while. wanna say he started racing in like 1974/5 ish. i am going to try to post a pic of his car.

 

all the pics are too big, i will try again later.

 

please do, i would like to see this car. sounds like your dad really knows what he is doing

 

not really so much that he knows alot, but more like he knows what works, does that make sense? if you have a na carbed sbc with hei ignition, he pretty much knows it all. but the second i start talking about the procharger i am going to put on it, he's like "those make a cool whine sound, but that's about all i know of em!" lol. he is really cool though.

 

Ya cool dads rock dude! :hail:

 

here is a pic

 

my cool dad

 

my car when it still had the 2.8 in it. the car would run 16.70's consistently. not too shabby for a 2.8 if you ask me.

 

damn that little v6 looks like its hookin hard to squat that low in the back

 

yeah, that's what everyone says, the car was pretty cool. it had a shift kit and a high stall converter, posi, blah, blah, blah. it would hook like nobody's business too man.

 

thats the kinda traction i need for my car

 

holy crap. man, both those cars are really hooking up. very impressive...especially the V6.

 

You are definitely forgetting to list a few parts there....

There is no way in hell a 14.5 happend with that combo and a stock stall for one thing...

And what heads were on it? Compression ratio?

 

yeah, i built another v-6 after that one blew but it kept eating trannys. hopefully my 310 won't be so bad. think i am looking at a 13 second street car?

 

johnny,
actually it did happen, he was running the 416 casting heads with 8.6:1 compression. i couldn't tell you the stall cause we had some problems with the ATI converter. the little 305 didn't like the 3500 stall so we threw in a random converter. please don't say that there is no way in hell. it happened and i saw it. remarks like that only make you look like an ignorant *******.

 

Just so you know... it requires a minimum of 213HP to propel 3300lbs of car & driver 1/4 mile in 14.5 seconds.... and that's assuming a perfect launch on wrinkle wall slicks and a perfectly matched stall converter and rear gears.

Unless you are forgetting to mention something you've broken the laws of physics, congratulations.

I belive the car went 14.5.... but don't try and pass it off as a stock LG4... the heads were milled for compression or the car was lightened to 2,500lbs, come on.

If it was indeed stock with those crap gears, stock stall and a powerglide... you better go look for the timeslip.

 

stock, stock, stock, the long block (wth the exception of the cam and roller rockers *1.5 ratio) was left untouched. the induction was upgraded to a holley street dominator intake and a 600 vs on top. ignition included an msd box, accel super coil (hei) and accel wires. exhuast was hedman shorties and y-pipe, dynomax catback. powerglide tranny with some trashy converter, 3.23 posi out back on a 26" tire. no head work, had oem gaskets on the motor when i pulled it apart to rebuild for my car. it was just a stock 85 z28 that we bought from a title pawn for $1000.

 

Sorry I forgot to mention that it was 214RWHP... 252HP at the crank.

Check for yourself:

http://www.speedworldmotorplex.com/calc.htm


A stock 1985 LG4 V8 came from the factory with 155HP at the flywheel... so you picked up just over 100HP with some crappy boltons... good job.

You better get the slip.

 

are you being satirical?

 

Very much so.... I'm calling your BS and you can't back it up.

When you get the slip, feel free to include the 60' and MPH


AND the 1985HP rating is with 9.5CR... if you drop the CR to 8.6 with 416 castings.... you definitely didn't have any more than 155HP even with the mods you listed.


Those HP figures correspond closer to a 15.5. with 3,300lbs of car and driver which is light even if you weight 10lbs...

 

call my bs. i will look for the slips when i have time. i am more busy during the day then i care to be, so i don't know if i will be able to find them. i really wish that folks would just learn to trust one another. anyhow. i don't know where the old timeslips are located and if we still even have them. the oldest thing i could find was of earlier this year, and we had already broken into the 12.50's with a 1.72 short time.

 

Yeah... that's on an entirely different engine and driveline.. 12.5 with a custom 355 is certainly possible... you would need 394 flywheel HP which is not unrealistic for an extremely built 355.

As for the LG4.... I think it's safe to say that you were mistaken and it was more in the range of a mid 15 which is still an amazing ET for a mostly stock LG4 with crap gears and a powerglide.

I just don't want other users to think that their LG4s should or could be running 14.5s with some bolt ons.

The 355 powered Z on the other hand sounds like an amazing machine, keep up the good work!

 

alright, i am going to say this once again. it had a cam in it with around .450" of lift. that helped out ALOT. i never said that a stock lg4 could run in the mid 14 second range. if your only reason for telling me that it can't be done is so that other users won't be mislead, then you have more problems then my pops car running mid 14's with a lg4 rotating assembly, a glide, and bad gears. i know that it happened. i was there. i have been drag-racing all my life. anytime he goes, i go. i can't give you hard proof. i am sorry. i can't seem to locate the timeslips. if i do come across them, i will pm you.

just to inform you, the lg4 based motor was in the z 3 years ago. that is why i am having a problem finding the slips. the z is probably never going to see anything faster then 11.75. my dad has no desire to go that fast. i, on ther other hand, am in the middle of putting a 10pt cage in the car, along with the motor build. i know it may be a little extreme for a 310, however, the car will see a bigger inch small block with a procharger soon. the 310 originally started out to give willie hell. however, i had a hard time finding pistons for it, ie.: a set of forged blower pistons with a floating wrist pin. nobody makes em. ross wants $750 and JE wanted $880. i had already bought a set of eagle h-beams and everything. needless to say, i was pretty disapointed when cast pistons and i-beams where the parts going to be utilized.

 

The cam would help... but not 100HP. 3 years is a long time.... memories get fuzzy.

 

my dad's doesnt get fuzzy, he confirmed my thoughts. i never claimed the cam gave 100hp. the cam combined with the other things, probably did.

 

my car had the LG4, with a cam with .454 lift on the intake and exhaust with a 216 duration. the specs are here: http://www.cranecams.com/master/apps...3.%20Energizer

i had flowtech headers, dual exhuast, an edelbrock performer and a 700r4 with a cheap B&M shift kit. open rear with 3.23s, stock stall convertor. stock q-jet. the best i could get out of it was 15.3

 

flow tech headers are 1 1/2 and hedmans are 1 5/8, the holley street dominator intake is the same as the performer RPM, so that's alittle better, the Q-jet was replaced with a holley dual feed 600 vs four barrel, so that's different. we had a posi unit, so that helps, crane blue racer cam .442"in .465" ex 280/290 (214/224 @.050), that helps alittle more. we had aluminum roller rockers. all these factors being different may have been why our car went faster. i am by no means saying that ya'll don't know your stuff. but i am saying that it is possible to get these motors to run abit faster than average.

 

That's not enough to make up the difference... but this is getting rediculous. I'm finished if you are.

 

yeah, me too, as long as you admit that it is possible to get the car running that fast. i am not saying that it will happen in every case, but it did infact in ours.

 

hell i think its possible, my brother ran a 15.5 with just headman headers and full exuast and k&n with his 86 lg4 sport coupe. so i think its possible with a cam, intake, good carb, stall , gears and posi

 

oh, those numbers are with no air filter, if that makes a difference...

the stock 3.23's and a no name converter in front of the powerglide where installed at the time, that is why they are having a hard time believing me.

 

i don't mean to beat a dead horse, but i got my 1/4mile times with the new setup. the car ran a 14.5 with absolutely horrible 60ft times. best 60 was 2.16. i had a really bad bog at the bottom of the track. i was trapping 95 mph though. in a 3200lbs. car, that's 14.20's. with the bog fixed, the car should see 98mph. which is NOT unatainable(sp) with this setup. 98mph is good for 13.9's. not mid 13's but still, very respectable from an n/a 305 .030 over on 87 octane gas, that is in a car that is driven everyday. the motor still has more in it too. oh, stock runner heads with the stock BABY 1.84/1.46 valves. planning on an even bigger cam, world S/R Torquer heads, and the edlebrock FI system.

 

How is horsepower calculated?

I have a 1992 RS 305 with original block, pistons, rods and crank. Milled and mildly ported heads (601 castings) w/1.94/1.50 valves. A 235 degree duration .488 lift hydraulic cam plus 1.6 roller rockers. Hedman long tube 1-5/8 headers. Torker 2 intake w/750 VS Holley in a gutted body running 8.11 ET @ 85.45 MPH in 1/8 mile. 60' is poor at 1.85.

The trans. is a TH-350 w/4.10 gears and 27.5 X 12 X 15 NASCAR slicks. I am picking up a set of MT slicks tomorrow to drop 60' time.

car likely weighs 3250 w/driver. How much HP am I making?

 

That pretty good times for youir set up.

 

http://www.greatlakesdragaway.com/analyzer.htm


go here to caluclate hp....with the bog i had, it says that i have 230 rear wheel hp. all figures are based on rear wheel hp and 1/4 mile trap speed. with the bog fixed and the estimeated 98 mph trap speed, that puts me at 253.4 at the rear wheels out of a 305 with 87 octane....

 

You can get into the mid 13's with a stock bottom end 305 with a good combination of parts. I managed to do it before I built my 383. I didn't have the money to build a new engine in college so I experimented with my 305 for a few years and found a combo that worked well together. My best run was a 13.4 @101mph, that was with the stock lg4 bottom end with about 100kmiles on it and full interior ect. Its a nice cheap setup for street/strip and was very drivable. Heres the combo.

stock heads: milled for 9.5:1 compression, bowls blended, 3 angle valve job, pocket porting, ferrea valves, crane valve springs
crane 274H cam
performer RPM intake
carter electric fuel pump
edelbrock 600cfm carb
hedman LT headers
vac. advance HEI w/ recurve kit
4.10 gears
B&M 700R-4 w/ 3000 stall non lockup torque converter
E.T. Street tires 26x10.5
stock suspension except for spohn torque arm and LCA's

 

alright that calculator is WAYYYY off the only calculator on the net id even trust is the one at www.smokemup.com

im not even going to get into the argument on this.