over the summer i bought a 90 rs camaro with a v6 and i just put it away for the winter and have a 350 block i want to build from the ground up. i want to know what mods i have to do or what kits i could buy to make this 350 smoke a mazda rx8 without damaging mu wallet too much.

Honestly, use your 81 aluminum block.

As for what you would need for the 350, get a good rotating assembly, and some vortec heads. A good dual plane intake and a holley 650DP. That should get you in the ballpark.

You don't need a 350 to beat an rx8. My 305 Iroc beat an rx8 twice. There not that fast. I only run 15.4 too. If your putting a 350 in your car than set your goal to beat like evos. Go for a 13 sec car. You can do it.

haha that 81 is a project car that wont be done for awhile.
im just building this 350 to hold me over.

anyway do you know how much all that will cost me?

Stock RX-8's with competent drivers can hit 14.5's all day long friend. Not saying you didn't beat him/her, just saying it sounds like that person needs the driver mod.

was it a street race or at the track

I started my own personal 355 carb'd build almost a year ago, and my "budget" build is already over "budget" (which I'm okay with lol.) and I'm probably close to 3 grand. As for my parts list, look up my name and look up my budget build up thread, everything is in there.

yea why u worried about an rx8 lol

Because they are more potent in stock 6 speed form than most third gens ever were. Well except the SLP firehawks, and TTA's, etc.

haha i don't know my friend thinks his daddy's rx8 is the fastest thing out there and a few other people seem to think so too i just want to shut them up

All of what you said is possible, and the RX-8 is by far not the fastest thing out there. And I hope you do shut them up, just don't kill yourself or someone else in the process.

im not planning on it lol there is an old back road near my house and its long and straight.

You were saying that car is a V6? Is it auto? And if so are you keeping it that way? If not look into a good T-56 tranny out of a 4th gen and get ready to save your peso's lol.

yeah, right now its a v6 and it is auto and the tranny slips bad. is a t-56 better than a th700?
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I own a chevy" is more polite than saying "I hate ford."

it depends very much on what you are doing. for hardcore drag racing you will notice most guys back their stuff with a well build auto..
for the amount you would pay to get a manual swapped in you could buy a built auto and a decent stall that would shift you into your seat like you never thought possible. cough**tci superstreetfighter cough** sorry dunno what came over me there

I concor, owned quite a few of them rx8's.
305 owns rx8's!

vs an auto rx8 maybe. stick is another story.

For 90/81camaro;

Not knowing if your 350 is complete or not, I would start with the Eagle balanced rotating assembly. Holley offers the systemax 2 top end kit which comes with matching cam, heads, timing set, and intake (as well as trim parts), and is advertised at 425 hp. Throw on a holley 4150, or 4160 600-650 cfm double pumper, and a Pertronix Flamethrower ignition. Add a full exhaust system and you should be good with a solid 450 hp. That ought to be more than enough to accomplish what you want and still remain mild manered enough to drive daily.

Nope was stick, guy launched it, but i got a good to launch. got 2-3 cars on him to 70mph.

A few basic mods to your Lo3 can bring it to life.

Rx8's are sad compared to the turbo'd rx7's. The non turbo rx7's are really fun to see in the rear view mirror.

i don't know about you guys, but i got beat pretty bad by an Rx8 a couple months ago, i think his jump on me that he had off the line can be attributed to me only having the car for maybe a month and not as used to racing with the camaro clutch as i am with my other car. but i was flooring it in every gear and he kept pulling away, i tried my best to act as if i wasn't trying

bad launches will cost you many races.

I beg to differ there, they're mid to high 14 second cars....right in the range of a well running L98 thirdgen or the thirdgens mentioned above. Any mild 350 will beat those turds.

Okay, so you're getting peoples hopes up, considering in my experience I have never seen with my own eyes an L03 motor break 14.8's, and yeah an L98 is a good match, if both drivers are competent. The RX-8 is more potent though, stock for stock. Our rear end gears, even mated with the T-5 were um, pathetic from the factory, and thats quite the opposite with the actually performance oriented RX-8. The renesis motor is pretty stout, just a stock reflash of the computer with no rev cut brings them to low 14's. Street port them and they're in the high 13's. Thats a reflash and some polishing....... I'd have to do alot to get my L03 in the 13's..

Where did I mention anything about LO3's? You said they were more potent than any thirdgen aside from a Firehawk and TTA...and that's just not true. Stock for a stock a well running L98 would be equal to the RX8. No where did I say anything about a LO3 or a T-5. I've seen too many of the RX8's run at the track to be impressed....high 13's on a newer modded performance vehicle is a joke. My L98 89 GTA was running 13.80's with a CAI, a chip, cheap flowtech shorties and set of DR's. Not bad from a low tech m-u-l-l-e-t mobile.

I'm not getting anyone's hopes up...the facts are the facts. I'd take a L98 Fbody on the street(provided it has good tires) over an RX8 any day...stoplight to stoplight that RX8 and all of it's fancy technology would be toast. Cool cars I guess, not really that impressive though.

Apparently can't say mull et on here

Apparently can't say mull et on here [/quote]

wow lol i know it probably "has no place on the boards" but thats kinda sad

All mull ets aside, lol. Don't get me wrong I agree with what you're saying, and I too would take a well equipped 3rd. Gen over an RX-8 any day, I was just throwing out real numbers for these people to see. Some think, like I did when I was 13, that any V8 is superior to almost anything on the road no matter what. Tell that to the L03 guys, they'll disagree lol. But as for what you said above, I agree.

I know, you can't tell the LO3 guys anything.

im an Lo3 guy, bring me your RX8, and ill spank you as many times as you want. I don't know who is giving credit to these cars. Stock 1/4 mile for a rx"crap"8 is 1/4 Mile ET: 15.010. @ 1/4 Mile MPH: 93.020 with a six speed.


With no hardcore mods, my 200,000 mile, 20 year old car ran that. Thats sad for 2007 sports car.

Your stock LO3 runs a 15 flat?

1985 Pontiac Trans Am (Hot Rod Magazine)

Engine: 305ci (5.0L HO "L-69"), 9.5:1 Compression Ratio, Rochester 4 BBL, HP: 190, TQ: 240
Drivetrain: 5 Speed Manual Transmission, 3.73:1 Rear Axle.
1/4 mile: 15.30 @ 92.41 MPH
Skid Pad: .92g

1988 Chevrolet Camaro (Hot Rod Magazine)

Engine: 305ci (5.0L), 9.3:1 Compression Ratio, Throttle Body Injected, HP: 170@4000 RPM, TQ: 255@2400 RPM
Drivetrain: 5 Speed Manual Transmission, 3.08:1 Rear Axle.
0-60 MPH: 7.6 seconds
1/4 mile: 15.71 @ 89.3 MPH
Skid Pad: .82g

1988 Pontiac Firebird Formula (Hot Rod Magazine)

Engine: 305ci (5.0L), 9.3:1 Compression Ratio, Tuned Port Injected, HP: 215@4400 RPM, TQ: 285@3200 RPM
Drivetrain: 5 Speed Manual Transmission, 3.45:1 Rear Axle.
0-60 MPH: 7.1 seconds
1/4 mile: 15.07 @ 93.4 MPH
Skid Pad: .86g

1989 Pontiac Trans Am (Hot Rod Magazine)

Engine: 305ci (5.0L), 9.3:1 Compression Ratio, Tuned Port Injected, HP: 215@4400 RPM, TQ: 285@3200 RPM
Drivetrain: 5 Speed Manual Transmission, 3.08:1 Rear Axle.
0-60 MPH: 6.72 seconds
1/4 mile: 15.64 @ 92.8 MPH

1991 Pontiac GTA Convertible (Hot Rod Magazine)

Engine: 305ci (5.0L), 9.3:1 Compression Ratio, Tuned Port Injected, HP: 225@4400 RPM, TQ: 300@3200 RPM
Drivetrain: 5 Speed Manual Transmission, 3.42:1 Rear Axle.
0-60 MPH: 7.36 seconds
1/4 mile: 15.37 @ 89.73 MPH

1991 Pontiac Firebird Formula "1LE" (Hot Rod Magazine)

Engine: 305ci (5.0L), 9.3:1 Compression, Tuned Port Injected,
HP: 225@4400 RPM, TQ: 300@3200
Drivetrain: Drivetrain: 5 Speed Manual Transmission, 3.42:1 Rear Axle.
0-60 MPH: 6.53 seconds
1/4 mile: 14.55 @ 92.95 MPH

1992 Pontiac Trans Am Convertible (Car Craft Magazine)

Engine: 305ci (5.0L), 9.3:1 Compression Ratio, Tuned Port Injected, HP: 205@4400 RPM, TQ: 285@3200 RPM
Drivetrain: 5 Speed Manual Transmission
0-60 MPH: 7.0 seconds
1/4 mile: 15.4 @ 91.3 MPH
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Mines not so stock, but i have not done any huge upgrades like heads.
20+ year old technology keeping up with new technology.
Bullshit huh ?.

Here is some eye candy of the rx8 "GT" "fill in what gt means here" getting spanked by camaro.

http://www.youtube.com/watch?v=AqSFZs5Q7do

I'm still waiting to hear how your bone stock LO3 ran a 15.0

BTW, magazine times aren't the end all be all, I've seen stock RX8's run faster than the time that was quoted.

I would say either you're a great driver, the rx7 drivers you have raced against suck, or your car isn't stock.

if anything it should be a little more of a drivers race between the two. if it was stock vs stock


didn't want to quote the whole thing I wouldn't quite call that keeping up basing it off one car. and it's more of 20 year tech hardly keeping up with a motor that is almost a 1/4 times the size of yours. if anything I would call it a little more impressive for the rx8.

but yeah this is just one car out there. I wouldn't base a wholel ot on how good your car is vs modern tech taking it against this one car


don't forget he still has the great 2.73 High performance rear end also :-)

but agreed with rags. don't trust them.it seems they fail to hit the mark (15 second l98 thirdgens) many times on cars. and those high strung cars that aer hard to launch usually get much worse scores.

ok this is what i've decided to do, im going to bore the block out .030 over buy a new edelbrock intake manifold (1,500-6,500 rpm) i have an old edelbrock intake but its idle-5,500 rpm and i want a more wildly mid ranged car. i also am going to buy a edelbrock cam with a valve lift at .488 (intake) and .510 (exhaust). i plan on keeping my stock crank and porting out my heads. im not sure about pistons or carb yet.

Kind of sounds like a 14 second combo to me. What do the RX8s run? Why not build a stroker motor, with some nice heads, a matched cam, and an intake while the motors in prime position for it?

im not sure what the rx 8 runs im just going by what everyone has told on this thread. im not going to make it a stroker because im not sure the car will hold it and the block is a 2 bolt.

wooo you my first relpy..... and im happy to say you wont need much to destory a stock rx8, i ll tell you why.

the car:
the 2nd car i ever owned was a 1986 caprice classic 305 bone stock, with a trany slip in 2nd, and a oil spuirting problem.

the know nothing rich kid:
let me tell you this kid was a card, he would always say "man ill destroy you by 6 secs easy" i can beat vets with the rx8

cuse i wasnt stupid i took him up on his offer and placed a 10 dollar bet on it, not much i know but hey it was tank of gas. so we find a strip and line up. i had no doubt i would keep up

the race:
we line up and went.... i lost, but for the first half of the race i was in front then the 2nd gear stuck till 50 mph and i saw him pass me, he beat me by one car length

ok so his 18 thousand dollar car beat my 1 thousand dollar boat, i was still happy.

i plan to race him with my 355 so i can finally shut his big mouth.
good luck with your race

welcome to the site. so would you say the RX8 was quick off the line?

it was fender to fender up till my transmission stuck, the caprice had pretty good torq.... but you have to watch out for the good slush box shifters, and the rpms on a rx8 range to 10k, so if he is moded in any way you stand to have a problem.

also my buds raced him, they pretty much tied him with there 04 v6 stang stock, and a 02 v6 malibu.

so if this kid is any thing like the one i have then he's holding a pair instead of a full house.

if it were me i would race him with what ever i had... but dont forget to tape it like i did, lol cuse he's going to turn it into a big fish story.... lol when i got back to work he was saying he gave me and my friends a 4 sec head start
so yah have fun and be safe, and if you do lose, be a man about it

good luck

thanks. and there are no mods to his car but the kid you raced and the kid that im going to race sound like the same exact type of person haha it must be an RX8 thing.

um, a stock RX8 is a pain to get off the line. they have no bottom end torque. they do move quite well in the upper rpm, but if you can put some lengths on them down low you should be able to hold them off.

and btw, the RX8 isn't light either, they're close to 3500lbs. but they weren't meant for straight line accel, the twisty's are there homes.

yea i figured they would be good on curvy roads. but im making my car to be a mid to top end car so what do you think their top speed is?

stock they'll run right up to 145mph. (i've done this on a test drive)

where are you getting that weight from? My understanding was they are only ni the 2800-3000lb range or so. having a heavy car goes against making twisties their home.

found from Motor Trend and C&D. maybe they tested those two cars with drivers in the car???

They might have did that, but you know how sometimes Motor Trend and C&D and other Auto magazines at times put their own spin on the stats and info on their cars I guess.

My buddy has an slighty modded 05' RX8, which so far hes had for about 2 yrs.

At the time he just bought it, My Z28 was slighty modded also, and we would have our runs ends from time to time, and I would get him off the line most of the time. (unless I was too throttle happy at the moment). :D

But thats was a while back, and he car runs abit quicker now, but since the Z28 has more things done to it from the last time, he doesn't try anymore :D

http://www.motortrend.com/cars/2004/...ons/index.html
Weights: curb weight (lbs) 3,029

http://www.caranddriver.com/car/make...azda-rx-8.html
Curb Weight: 3053 lbs

and I'm not sure how well a 400-500 driver would fit in the car

Maybe they use a Crane or something to get in & out of it.

that kinda reminds me how my friend at work would drive a S2000 or any extremely small sport car comfortably whenever we go on errands and etc.., and he 6'8!