Recent content by carby tuning techniques

thought id post this. Few weeks ago i fixed up a sniper on a small block 454 in a Monaro. Client thought it was underpowered and wondered if i could extract more power out of it. We drove it and i data logged the drive then went away and looked at the logs. I made an advance table for it and...

load sensing spark advance is extremely important in achieving great driving standards. When i tune engines i make sure that the spark strength is as strong as i can get it,this includes changing coils and ignition types,alternators (which i monitor as we drive - a lot of the time they get...

I like that. For me thats the fun of tuning,is working out what works for the car at hand and seeing that smile on their face when they drive it.

That is a very nice looking engine bay. very nice.

yes i agree.

he doesn't know.its a narrow lobe cam. When i looked at the car it wouldnt idle or drive correctly,no power very rough.

Mechanical: 17°@idle 25°@2200 32°@3300 33°@4000 34°@5000 Vacuum: 3°@8" 7°@11" 15°@15" total 49°@cruise with vacuum timing starting as soon as you move the throttle.This requires tuning as to get blades exactly in the correct spot for the vacuum pickup point with where the vac hole is located...

i agree with what they say. Time is so crucial for air saturation,as it is for compression.When you reduce both you have a mess to deal with.

The unleaded fuel that we have to deal with today is difficult to understand when tuning with large cam street engines.I did one today,350 chev with world product cast heads and big cam with not enough compression and not enough spark energy.So it likes to run more on the light vapors.required...

Hi Bret, You sound interesting. i have one question for you. What is the greatest thing to date that you have learnt in tuning cars?

vaporization and timing.

i agree.

Yes that is correct. With the smart carby there was no air correction system for the mains fuel,so the mains fuel is initiated at lower cfm flow.it was pretty cool.

i dont know

The camshaft profile greatly effects the vaporization of the fuel,especially in low load driving.There is potentially a large amount of vacuum generated as the intake valve lifts off the seat area and its this area where a lot of vaporization takes place.You can kill this area real quick when...