too much HP.
Safety Car
Joined: Aug 2008
Posts: 4,344
Likes: 48
From: San Marcos CA
You might consider getting an all mechanical distributor (no vac advance). Small block chevies usually make max power on about 36 deg total timing. Some a little less if they are running the vortec style cylinder heads... but I digress. If the distributor has 24 degrees of vacuum and mechanical advance, then setting the initial timing to about 10 degrees will put you in the ballpark.
Tech Contributor
Joined: Jun 2004
Posts: 20,910
Likes: 962
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
You might consider getting an all mechanical distributor (no vac advance). Small block chevies usually make max power on about 36 deg total timing. Some a little less if they are running the vortec style cylinder heads... but I digress. If the distributor has 24 degrees of vacuum and mechanical advance, then setting the initial timing to about 10 degrees will put you in the ballpark.
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
i have listen to my brothers on this forum and feel i have made a mistake.i built a 408" sbc with all forged short block,AFR 195 heads,1.6 dollar rockers.lunati rollar cam,air gap rpm manifold.labor no object machine shop time no object ,balance to 1 gram,all the best CNC bored and surfaced dead nuts.10.6 compression,.005 deck height.Molodon 7 qt pan,HV pick up and pump.first question; i used Lars ignition timing with empty HEI just a pick up i use MSD to fire.i put rubber band on HEI weights then disconnect vacuum disregard initial timing and take it up to 2500rpm and set at 36 degrees .initial was 23 degrees at 1000 rpm.i feel this is high when connected with vacuum advance it comes out to 54degrees.i put on road -------------ridiculous 3.55 rear with turbo 400 1st gear (700R4 on bench)spins goodyear radial 225/r 15 like i had bicycle tires .i do i calm this monster down! will dangerously break wheels loose in normal passing situation.
Le Mans Master
Joined: Oct 2010
Posts: 6,937
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
i just put a set on mine and actually it handles better than the cooper cobras that were on the car. i suspect they will even be better in the rain. those cobras supplied NO grip.
Le Mans Master
Joined: Oct 2010
Posts: 6,937
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
strictly speaking as a casual observer when richie from PCHS racing engines assemble the short block and insisted he would use his parts the forged crank had holes thru the crank throws and throws we also knife edge.this along with 6" HP. damper and moroso hp. flex plate.H beam 6" rods add tons of torque and Richie Zull insisted on them along with those forged light weight piston with 3/16" hand filed rings and special roller chain from germany. apparently i guess this is what makes this engine go from 1000rpm to 6000 rpm in seconds. i agree sort of a waste for a sunny day summer joy ride car.
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Racer
Joined: Jul 2013
Posts: 307
Likes: 19
From: Kirkland WA
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
I think that reducing cam size and or carb size will only add to low end, if traction is an issue and tires don't cure it, then you need to take away from the lower end. I still think that wider tire will do wonders for the traction issues.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
And theres no such thing as too much power, just too much happy pedal. Put new tires on it and learn how to drive it. I imagine the tires you have on it are rock hard and old and a stock L48 could spin them
Thread Starter
Racer
Joined: Jan 2013
Posts: 302
Likes: 2
From: Sayville New york
7t9182 i would never ever say anything about richie Zulll on this forum every body would label me BS. however i was there and saw it with my own eyes at NHRA nationals.the pro stock boys hated him and threaten our life`s if we were not out of town by sundown. exactly like taking your wife`s car in the garage work on it go to Daytona take a lap and qualify for 50th pole position then win by a car length.no sponsor ,plane white camaro with his name on back of car look like he drove in from parking lot ,starting in last place round robin so he had five times the runs on that engine as any of the leaders turning over 1000 rpm more then any other car beats Chevolet sponsored Warren Johnson on final run.----ridiculous how is that possible 498" big block one four barrel.final Dyno run at 4am before installing in car and nobody saw nothing 1834hp at way past 9000 rpm.!!!I am not even going into the APBA boat racing and not many people would comprehend a race boat that never lost or even place second finally the "the boys" burn the boat while on the trailer in the pits. no more discussion he is gifted and thinks way out of the box.
Thread Starter
Racer
Joined: Jan 2013
Posts: 302
Likes: 2
From: Sayville New york
thank you blue dawg i was considering installing a Holley 600cfm i have but you are right it will just take away from top end i will go with 275/r-15 hopefully i will not raise height of car at rear as of now it is 1/4" higher in rear.the motor showed 565hp on first pull i was not happy so we removed single plane high rise manifold with 11/2" spacer along with that other cam i mention took hp al the way down to 516hp at 5600. i will leave it at that and learn to drive like he said Captain some of us go with .02 reaction you may need one minute to figure the lights went from yellow to green!
Burning Brakes
Joined: Sep 2012
Posts: 818
Likes: 0
From: coon rapids mn
you can find many different drag radial tire sizes meet your needs .do you have a 3310 vac -secondary carb on it ? thats what I see in the pics of the motor .if so put a very stiff spring in it to slow down the opening of the secondary .also consider better shocks and springs to help transfer weight for better traction .
Thread Starter
Racer
Joined: Jan 2013
Posts: 302
Likes: 2
From: Sayville New york
you can find many different drag radial tire sizes meet your needs .do you have a 3310 vac -secondary carb on it ? thats what I see in the pics of the motor .if so put a very stiff spring in it to slow down the opening of the secondary .also consider better shocks and springs to help transfer weight for better traction .
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
No such thing as too much power... That's an oxymoron. Sacreligious to even say it...
The whole point of building hotrods is to have a lot of power you can cruise with..
I'm about to drive my 10 second car cross country with no OD for crisssakes..
Build em, race em, DRIVE EM!
The whole point of building hotrods is to have a lot of power you can cruise with..
I'm about to drive my 10 second car cross country with no OD for crisssakes..
Build em, race em, DRIVE EM!
Le Mans Master
Joined: Oct 2010
Posts: 6,937
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
7t9182 i would never ever say anything about richie Zulll on this forum every body would label me BS. however i was there and saw it with my own eyes at NHRA nationals.the pro stock boys hated him and threaten our life`s if we were not out of town by sundown. exactly like taking your wife`s car in the garage work on it go to Daytona take a lap and qualify for 50th pole position then win by a car length.no sponsor ,plane white camaro with his name on back of car look like he drove in from parking lot ,starting in last place round robin so he had five times the runs on that engine as any of the leaders turning over 1000 rpm more then any other car beats Chevolet sponsored Warren Johnson on final run.----ridiculous how is that possible 498" big block one four barrel.final Dyno run at 4am before installing in car and nobody saw nothing 1834hp at way past 9000 rpm.!!!I am not even going into the APBA boat racing and not many people would comprehend a race boat that never lost or even place second finally the "the boys" burn the boat while on the trailer in the pits. no more discussion he is gifted and thinks way out of the box.
Thread Starter
Racer
Joined: Jan 2013
Posts: 302
Likes: 2
From: Sayville New york
Thread Starter
Racer
Joined: Jan 2013
Posts: 302
Likes: 2
From: Sayville New york
holley 505 i like those 275/r60/15 MT. do they fit under wheel well without back spacers? would you happen to know the diameter?trying to match 27" diameter of front tires.---thank you bob
