ok, for my 350/TPI build up, i am planning on using the ZZ4 roller cam

is this cam ECM compatible?

if not, can a chip be burned to make everything get along well?

if so, can you point me to a source that can burn a chip for me?

it has very little duration and some nice lift, fits my whole idea of lotsa-low-end torque, which is what i like cuz i drive my cars on the street mostly

judging by the cams specs, i am guessing that the LSA is high enough to use this cam with an ECM

please help

thanx

 

Yup, but you'll likely need some custom chip tuning for efficiency and streetability. Maybe not so much if you're running MAF, but for SD you'll be changing the airflow characteristics dramatically and it will likely run poorly.

See above.

Ed Wright at Fastchips.com

I used a HOT cam when I did my buildup, and did the do-it-yourself chip burning thing. With MAF I found gains by adjusting the WOT fuel and spark tables, when I later upgraded to SD I found I had to hit these and the main VE table quite a bit. Ed Wright should be able to do the same thing for you, if you don't want to do it yourself.

Again, with custom tuning you can get away with quite a bit. HOT cam has a 112deg LSA.

You've been helped.

 

thanx kevin

i guess i can see why SD is less forgiving- it only uses the MAP sensor to judge engine load based on vacuum changes, so when you put in a cam that lessens vacuum, it cant correctly judge with the new vacuum readings because the ECM thinks the old cam is still in there?

am i correct?

 

Yup. '730 SD calculates air volume based on several sensor inputs, whereas '165 MAF calculates based on the MAF sensor input and a voltage lookup table.

Put a lumpy cam in a MAF car, the MAF doesn't really care about the lumpy idle and low manifold vacuum...it sees a quantity of air being passed across the MAF sensor.

Do the same in an SD car, the MAP sensor sees lower vac and the ECM incorrectly calculates the qty of air being delivered. Easy to adjust if you have TunerCat/GMEPro and a PROM burner, easy to know how much and where to adjust with Moates or DataMaster ALDL software + laptop + ALDL cable.

 

ok cool, PROM burning is something i definetly want to get into

i just dont have the time nor money now really

thanx

 

the time and money you spend on fastchip, will be more than the time and money you would spend if you do it yourself. since you want to do it yourself anyways, take the leap now.

figure it this way. for the $350 you will pay to ed wright for a custom chip, you can have a pocket programmer ($150), a moates memcal adapter thingy and a few flash prom's ($50), tunercat and the appropriate definition file ($90), moates scanner software (free), DIY cable for the moates software ($10?), and enough money left over for a six pack of your favorite beverage, a large pizza, and a tank of gas for your first testing and tuning session. and as for the time, you won't have to wait for each additional custom chip to arrive from fastchip, and it's easily possible to get the motor pretty close relatively quickly, in a single afternoon while enjoying your large pizza and six pack of.. coke, of course (you don't drink and drive, do you? )

As for the ZZ4 cam, not sure why you picked it, it's got a little more exhaust duration than a stock TPI cam but thats all, but i think the car would start and run OK with the stock chip. it woudln't be optimum, but it would get you around if you needed to drive it and you could learn DIY PROM as you go.

 

Wait till you see what Fastchips and the others get for a "custom" PROM...that will take care of the don't-have-money part. Time investment is a valid argument tho, it definitely takes time than plunking down your credit card and popping in a chip.

Sure it will be closer to your combo than stock or off-the-shelf chips, but the only way to get dead-on is using engine run data and dialing it in.

 

dont i need a laptop for the engine run data?

i dont have a laptop

how long is the cable, cuz i can pull the car up to my bedroom window where my computer is LOL