making power from a 305 caprice clASSic

[evil[apostrophe]tree]

me and my buddy have this shitty $100 86 caprice classic with a 305 and a four speed auto that we are going to stock car race/demo at our local speedway and were wanting to make easy power with so we can get out of the turns. we were going to cut a hood scoop, open the exhaust up so it's just dump pipes, relocate the radiator [where to is the question, on top of the motor?], and look into getting a different gearing for the rear end. according to some research he did with the vin number of the caprice it's got a 2.73 gearing which blows for getting the fuck out of corners. does anyone know how we'd find out what other gearings were offered in vehicles with a gm 10 bolt so we can just swap the internals and not have to fuck around with welding up bracketry for a new diff and axle housing? how can we permanently lock the diff? just by welding the spider gears to the planet gear between them? will that hold up and keep them locked while we're whaling on if drifting through dirt? will the exhaust manifolds from a 350 bolt onto the heads of a 305 for better flow? or are the 305s manifolds skinny for a reason?

[Sponsored Link]

You're going to track... a caprice?

[evil[apostrophe]tree]

it's like demolition racing, some of it's circle track some of it's figure 8, it's more like old school stock car racing than modern racing.

[Kwinnie Bogan]

Is this the 24 hours of LeMons by any chance?

[evil[apostrophe]tree]

nah, that was my dads first question too. it's just some ghetto ass racing league at a local track.

http://www.sycamorespeedway.com/

[Kwinnie Bogan]

I am jealous that America constantly hosts official events like this, and it all costs pocketchange. Private events, where you probably know everyone and are familiar with too many things, are just not the same. Calder park, Barbagallo, etc are different too.

A 350 would have been very good, but even the weak 305 isn't bad for a $100 bomb. But I mean it when I say that's a weak motor. It's pathetically underpowered, and can't take much more power.

Welding up the diff - Is the track dirt or asphalt (MACADAM :D)? Yes that's how you do it, but you'll break it when you corner on the road, or you could also fill it with extra steel to strengthen it then snap your axles. 3.73's will fit right in your diff, and are a very good way to go. If you're racing on dirt some knobbly tyres would be good too. Shockers in good condition are a plus, but not worth the expense to replace. Who says you can't just cut the exhaust off at the cat with an oxy? AFAIK 350 headers should fit, but you better check steering pump and air condition compressor clearance.

EDIT: Is this the class you're racing in?:

2009 SPECTATOR & POWDERPUFF & COMPACT

RULES AND REGULATIONS

1) GENERAL RULES


A. Any stock American made automobile or station wagon with a minimum 1O8-inch wheelbase is allowed. NO TRUCKS, SUV'S, CONVERTIBLES, SATURNS, AND T-TOPS ALLOWED. POWDER PUFF MANDATORY 4.DOOR CAR-FULL SIZE. NO CAMERO'S. NO FIREBIRDS.

B. Age limit - valid driver's license.

C. No drinking on track or pit area or you will be removed from the grounds.

D. We will draw for starting positions, or other means, to facilitate positioning.

E. The number of events, number of cars in each event, type of racing (normal or novelty) and finishing positions will be determined by the officials and their decision is FINAL.

F. We will exercise our judgment for what is best under the existing circumstances to which track, half or quarter mile, the competing cars will race on.

G. All scoring and positions are determined at the time the leader received the checkered flag. Official's decision is FINAL. Your car must be ready to race when the event is called. We will not hold up any race for your car. Any disputes, questions or problems will be heard and settle in the Pit Office. The Director of Competition and his staff will resolve all racing matters. All racecars must abide by the safety and general rules of the Sycamore Speedway. A copy of the general rules maybe obtained at the pit office or by calling (815) 895-5454 between 7-9 p.m. Monday through Friday or Syamorespeedway. Com.

H. We want everybody to have a chance to race. We will not allow any goodies or high performance parts or pieces. Valve Covers, springs, shocks, after market parts, NO EXCEPTIONS. For further information, call us. Winning cars could be inspected for vacuum -

I. Remember, the important thing is your car must be stock or it cannot run. This is the FUN class and the payoff is trophies (for the CADET class). If you as a driver are not satisfied with the money involved, you are asked to forget the Cadet competition and advance into another division. DRIVER'S NOTE: Remember, these cars are to be stock. If you win and are not STOCK, you will forfeit win.

J. First and second place car must start at the rear of the pack the next racing event.

K. Feature race only- three points for first place, two points for second, one for third.

L. All cars will be inspected before the race. Winning cars will be inspected after the race if necessary. NO coverage or responsibility for any damage to any car. Cars must be numbered and inspected by Pit Steward. Numbers may be obtained by calling (8 15) 895-5454 between 7-9 p.m. Monday through Friday. Racecars will be inspected by officials at times they so designate.

M. All cars must run heat races.

N. DECISION OF JUDGES AND SCORERS IS FINAL.

2) SAFETY ~

A. Safety belts, approved helmets, goggles and/or face shields are required.

3) PREPARING CAR FOR RACING

A. STRICTLY ENFORCED. All glass, including head and tan lights must be removed, except windshield, before arriving at the speedway. Cars must be swept clean. No junk tires, wheels, metal parts, etc. allowed in car. No windshield screens or bars or radiator screens are allowed

B. Front doors must be painted white and left blank for numbering. KEEP SAME NUMBER ALL YEAR. Different car-same driver-SAME NUMBER.

C. Any sharp protruding objects on cars must be smashed down or cut off.

D. All doors must be fastened shut by wire, straps, welded or chained.

E. Any driver's door coming open during the race will be disqualified



F. Hood and deck lids must be operable until after inspection. They may be wired only with one strand #14 wire ONLY. NO CHAINS OR WELDED.

G. Number painted on opposite driver's side door, PAINTED BLACK ON SOLID WHITE DOOR. NUMBER WILL BE 18" HIGH MINIMUM, STRICTLY ENFORCED.

H. Both front seats must be in place. We strongly recommend you leave interior of your car complete.

I. Insulation under hood must be removed.

J. No special bumpers, reinforcements or fabrications other than stock replacements will be allowed.

K. Batteries may be moved to any reasonable position in the car, but they must be securely fastened and covered. Only one, any size battery allowed. Fans may be removed.

L. Cutting fenders for wheel clearance only is permissible.

M. Suspension must work and look stock. Car must sit level.

N. It is recommended that an opening be cut in hood over carburetor 8" square or diameter.

M. Rocker panel wrap may be used on driver side door not to exceed 6in above bottom of door and .060 thick.

O. Roll bar may be installed 4 point only.

4) COOLING-A. Cooling system must remain in engine compartment. Radiators and fans may be removed. NO screens.

5) POWER TRAIN

A. Must be stock as it comes from factory.

B. NO locked rear ends, limited slip differentials or welded spider gears are permitted.

C. Welded, solid or chained down engine motor mounts are permitted and recommended for safety.

D. Stock O.E.M. cast iron exhaust manifolds only.

6) WHEELS & TIRES

A. Stock wheel nuts only, 7/16 and 1/2!

B. No snow tires.

C. No white spoke or racing wheels, 7-inch maximum width.

D. No pipes welded over tire valve stems.

E. No Good Year Wrangler tires- No LT, AT tires.

F. Any winner using different size tires to aid in handling will be disqualified.

7) THINGS NOT TO USE

A. NO HIGH performance or after market products.

B. NO reinforcement of any type.



C. NO locked rear ends.

D. NO spring jacks or blocked shocks or reverse shackles permitted. Suspension must be free of blocks.

E. NO setting up of chassis.

F. NO pinching of shocks to stop travel.

G. NO obscene or dirty language or pictures to be painted on car.

H. NO after market electric fuel pumps.

I. NO sway bars on any GM car.



J. NO welding and no chaining of bumpers or mounts.

K.NO racing gas or additives.Pit steward has the right to refuse your car to race if be feels it is unsafe.

SPECTATORS: YOU ARE RESPONSIBLE TO PUT YOUR CAR IN THE PITS AFTER THE RACES!

8) CAR STORAGE

A. You may leave your car at the speedway AT YOUR OWN RISK. For this information and to obtain your racing number, call 815-895-5454 between 7-9 p.m. Monday through Friday. If car does not run for one race night, car will be removed. NO EXCEPTIONS. We pay top prices for your junk car. Check with Pit Steward. NOT RESPONSIBLE for any car left at Speedway.

If so, there goes half your plans.. We'll try to come up with something though, how many days until your car has to be inspected. If it's on race day, how far away is that?

[evil[apostrophe]tree]

were shooting for a class above that but may settle for that. the rules arent really enforced, they enforce the obvious safety ones from my understanding but don't start enforcing car limitations until you're winning every weekend. there's guys there running car that you can hear the hot cam in and no one cares. the lower levels don't win anything worth having other than trophies, so it's just for fun...

we got time, they just let you show up on race night an race, season starts in june i'd like to say...

[a giant pterodactyl]

tree;146233']me and my buddy have this shitty $100 86 caprice classic with a 305 and a four speed auto that we are going to stock car race/demo at our local speedway and were wanting to make easy power with so we can get out of the turns. we were going to cut a hood scoop, open the exhaust up so it's just dump pipes, relocate the radiator [where to is the question, on top of the motor?], and look into getting a different gearing for the rear end. according to some research he did with the vin number of the caprice it's got a 2.73 gearing which blows for getting the fuck out of corners. does anyone know how we'd find out what other gearings were offered in vehicles with a gm 10 bolt so we can just swap the internals and not have to fuck around with welding up bracketry for a new diff and axle housing? how can we permanently lock the diff? just by welding the spider gears to the planet gear between them? will that hold up and keep them locked while we're whaling on if drifting through dirt? will the exhaust manifolds from a 350 bolt onto the heads of a 305 for better flow? or are the 305s manifolds skinny for a reason?

305 and 350 are the same block.

turn the lid to your air filter upside down. that will add a little. advance the timing 4 degrees.

put a bottle of rubbing alchol in the gas...it will light it up..this can cause engine damage in the long run. i dont think you care about that on this car though.

all i can think of at the moment. good luck

edit: bypass all of the smog control crap...if it is still on.

make sure you have a CLEAN fuel filter on it.

[a giant pterodactyl]

You're going to track... a caprice?

LOL, for great justice and lulz... they are actually pretty badass.

[Sponsored Link]

turn the lid to your air filter upside down.

Someone else has been reading this month's Hot Rod :D

[a giant pterodactyl]

Someone else has been reading this month's Hot Rod :D

i was doing that 12 years before hot road ever though about it. professional G.M. mechanic 6 years, intermediate drag racing experience.
that is a noob trick, but works wonders for airflow.

have not read hot rod in years. sounds like they are still putting helpful tips in there, as ancient as they may be. lol

[evil[apostrophe]tree]

explain to me how that works? i was just going to cut and tig weld in a hood scoop with a box that directed the air into the air cleaner assembly with the lid off.

does the isoprople thing work?

[a giant pterodactyl]

tree;147547']explain to me how that works? i was just going to cut and tig weld in a hood scoop with a box that directed the air into the air cleaner assembly with the lid off.

does the isoprople thing work?

That is way better...just gave you a easy way to increase irflow, but you have something better planned.

when you flip the air filter cover, the air can suck directly into the air filter container without having to go through the little plastic tube. and it makes a cool sucking noise when you gun it.

isoprople works great, you will get blue flames at times too. especially if it is running a little rich. lolz it aint good for the engine but its fun as hell!

[Sponsored Link]

i was doing that 12 years before hot road ever though about it. professional G.M. mechanic 6 years, intermediate drag racing experience.
that is a noob trick, but works wonders for airflow.

have not read hot rod in years. sounds like they are still putting helpful tips in there, as ancient as they may be. lol

Yeah, they got a 4hp wheel gain on a 340? in a Satellite.

[Vargus]

A 350 would have been very good, but even the weak 305 isn't bad for a $100 bomb. But I mean it when I say that's a weak motor. It's pathetically underpowered, and can't take much more power.

It's practically the same block as a 350, just with a smaller bore. Cams and a carb would set it straight as far as power is concerned. Here is a build for it:
http://www.popularhotrodding.com/enginemasters/articles/chevrolet/0667_phrs_305_chevy_engine_blocks/index.html

Then again, you could always just say fuck it and throw in a stock Cadillac 454 or 500 in it. :)

how can we permanently lock the diff? just by welding the spider gears to the planet gear between them?

Yea, you can. I know that lifejunkie did this with, IIRC, a Geo Tracker and it snapped the differential the first time he turned on pavement. Definitely a dirt/gravel mod only.

Try looking for a differential from a Chevy truck. My boss bought a 91-ish government Suburban and it had a 4.56 Positrac.

[nutsacks in buttcracks]

tree;146783']nah, that was my dads first question too. it's just some ghetto ass racing league at a local track.

http://www.sycamorespeedway.com/

where do live motherfucker im from kingston

[evil[apostrophe]tree]

ahahaha, you think i'd tell totse where i live? fuck that. come to the track the summer and look for some scum bags in a murdered out caprice classic cheifin' pipes and drinking beers.

my dad has 3.08 gear from an impala ss that he says will fit right in, i dont wanna swap the whole diff, i just want to drop in a new gearing, so i think i gotta settle for 3.08 open diff. it's likely the car will have to drive there so i guess the locked diff isnt an option anyways...

the cam from a factory 350 will slide right into the 305 block and use the same lifters and not have to re machine the rocker arm seats on the heads? does anyone know lift and duration differences off hand, or how about what motors i should be looking to pull cams from?

[nutsacks in buttcracks]

tree;152355']ahahaha, you think i'd tell totse where i live? fuck that. come to the track the summer and look for some scum bags in a murdered out caprice classic cheifin' pipes and drinking beers.

scum bags tokin pipes and drinking beers... hm sounds like everyone that goes there