I got about 600 miles on my 357 so I dicided to swap TBI units. I had a stock size (1 11/16") on there for the first while to discourage myself from beating it till it had a few miles on. I am re-using my 65PPH injectors so I cranked the pressure up to 22.5 lbs for starters. My lap top battery died on cue so I'm waiting for it to recharge so I can data log my VE table. I did a half throttle hole shot in the driveway and man this thing has some serious torque. I need to do some traction mods next. I had all this same stuff on my 305 but theres just no comparing it to this 350. I'm not flaming 305's, I'm just blown away by the difference. I wish I would have had the money to do this sooner.

 

Kool.....
What do you use the car for? Daily driver, drag, or whatever?

 

how does it idle/ how is general drivability? i assume you worked on fuel table prior?

 

I'm interested too as this is almost the same engine I'm building.

Ronny how does the Innovate WB work? Done much with it and do you think it's worth the cash?

Later

DM

 

last week the bung was welded in. my buddy is installing it very soon. maybe in pieces this time next week. his car shop very byusy now since seasonal. ,he is electrical genius. i believe it is hardwired to car but not ign on. i think powers up when fuel pump cuts on if i read directions correctly. if instalkled incorrectly it damages 02. that plus the cam install(he does/professional engine builder) and the 454TB as i have a new car to tune. i am certain the fuel tables will need to change. especially down low. i have baseline dyno run to compare with on prior level of tune. thaat wb02 will allow me to get AE in line.

 

It'smy daily driver / stress managment tool.

Ronny, it idles well and is very drivable. I used this cam in my LO3 so I had a good base line for a fuel table. When I started the new engine with the small TBI I changed the band pulse width accordingly to get it close for a 350. Then I data loged it and adjusted the VE table. How ever, wed. night when I changed to the biger TB I turned the pressure up from 15 lbs(LO3 setting) to 22.5 (to provide more fuel for up coming WOT runs)I had to start all over again tuning my VE table.

I hit a bump in the road yesterday when my fuel pump crapped out so thats what I am working on tonight.

I think the ZZ4 cam is a great all around cam. Its very torquey in a 350. In a 305 the power comes on about 2500 rpm. If you go with one you need to ad a ton of timing to the spark table.

 

Well it turned out that my fuel pump was OK. The short hose that connects the line to the pump was blown. Its a good thing that I'm a hack and cut a access hole in my trunk floor last time, esspecially being I had a full tank of gass . All I had to do was lift the carpet up, remove the pannel that covers the access hole, and pull the pump out the top. Takes maybe ten minutes to have pump in your hand.
Flamers save your time, cause Iv'e been flamed about this before and your opinion does not matter to me. What does matter to me is that I could change pumps in 30 minutes instead of 8-10 hours.

Gotta go do some data loging.

 

Don't worry about it. Scca American Sedans cut that area out install a door and a fuel cell.

Glad to see that it's up and running. Also glad to hear that the ZZ4 cam works so well. I need to get some time to work on my 350 other than on the "internet garage". LOL

Later DM

 

8-10 hours ????

ahhahahahahahahaha , you've got to be kidding me, it didnt take me that long to do it while my car was on jackstands in the freezing cold middle of winter laying on the ground in Indiana, jeeze some people around here are more dim than a bulb with no element, just waiting for one of these hack jobs to blow up / burn to the ground.

 

Who the hell are you to come in here and post a reply like that?

 

I SUSPECT YOUTHFUL IGNORANCE.

 

Actually he is a pro with swapping LT1's into 3rd gens. Just because it takes some people longer doesn't mean it isn't right or that they are incompetant. Some are more delibarate and take breaks to wash their hands and stuff. I can put an open element on in 5 minutes. Others take an hour. no big deal.

 

Ronny what did they charge to install your bung? Everyone wants ~$35 here.

Joker, what spring are you using that allows 22 psi? Thanks

 

i dont know. the bung was done along with crossover just behiind collectors. the crossover was a semi circle to give more volume. $170 for the job. resonance and noise was reduced, dam near eliminated.

 

Its the one that came with my GM VacAFPR. Actually I'm at 25 PSI now that I replaced the in tank piece of rubber fuel line. It must have had a small leak when I set it to 22 PSI. Anyway that spring is a minimum of 18 psi according to TDS, and I got more room for adjustment left at 25 PSI. If that dont do it I bought one of those 94-95 454 TBIs that Ronny is talking about in another thread, and its got a bigger spring yet (capable of at least 30 PSI).

Got alittle more tunning to do in my main VE table before I tackle WOT but it is going well .

Definitely has traction problems at sudden part trottle starts.

 

Have a nice day!

 

Sorry..........but if you're enough of one for five7kid to call you a jerk.
YOU MUST BE ONE!!

So don't sweat it Joker....there's one in every crowd.

DM

 

Finally starting to tune WOT. First thing I noticed ( besides deliberatly be rich) was that map falls to 95 at 5500rpm. I know that every one though you would need at least a 2" TB for a 350. I was guesing that a 48MM TB would flow about 600 cfm, which should feed a 350 to 6000 rpm at 100% VE. I might shave the throtle shaft to about .080" to help alittle. Actually it has plenty of power as is and I need to lean it out some more. Will see if I'm satisfied when done tunning this set up. My performer RPM manifold doesn't have alot of material between the plenum and the outside in the square flange area. I had to grind the flange quite a bit to get the width of the 48MM throtle blades. I would probably have to get a different manifold to run a 2" TBI.

Does any one know what 1.5 Hg = in MAP ? Isn't that what the Holley 670 is rated at?

I had to drop 3* of timing to eliminate some knock at WOT. The table I was using was left over from my LO3 which had less compression ratio.

 

The map dropping to 95% indicates that you're not getting enough air/fuel into the engine at 5500 rpm? That's based on the assumption you should be at 100 map at wot.

 

I'm not sure if you are asking a question or answering one. But ya, the low MAP indicates that my TB is to small to flow enough air for that RPM. A MAP of 104.5 would indicate no vacuume in the manifold. I found a conversion table and it looks like 1.5 Hg is about 98map.