1997bird

iTrader: (2)

Are the LT5's still available? I definately wouldn't mind playing with one. Looking at a few things, I see they share alot of the same part designs as the newer LSx series. The 4 valve setup with the overhead cams would make some killer HP & TQ.

edcmat-l1

iTrader: (10)

You see em used now and then. You gotta find em. I think theres a couple floatin around my area. And, yeah I wouldnt mind toyin with one.

Stan's Customs

Well for some reason an earlier post didn't make it to the forum...guess I didn't submit , phone rang or something.

So here it is again...

I talked to Mark at Retrotekspeed earlier today, and showed him the Fulie manifold on Arizona Speed and Marines website. He said he could set up a harness and ecm for that manifold ..no sweat. He also said that if I wasn't in a very big hurry they were going to have a port injection set up before long and would be really easy to do a set up then.

The only thing is that the ASM manifild is for Vortec style heads only, (it's a modified Ram Jet intake). I guess it would be building a motor around an induction system...which is exactly backwards...but I that manifold really appeals to me if I can configure a decent powerplant to go with it. It has a drop top for the early corvette hood clearance also ..which is real helpful.

I believe the broadband ECM Speedtek has is the cure for all the problems the ASM fulie manifold was having.....so what do you think about a motor with Vortec style heads...?

Best regards...Stan

transamman400

iTrader: (1)

Carb'd LT5? Probably insane but interesting. Dual Quads. Rev the thing to heaven and beyond...

1997bird

iTrader: (2)

Not a problem. Use some Edlebrock E-tec 170 cc int runner heads or AFR's 180 cc Vortec heads on a 283/302/327/350 motor.

Stan's Customs

327 or 350 I imagine. I don't know what would be best with this gear and a/c. Old 327s were fun but I don't have a clue what they would be like with modern heads. Might be better off to do a darn ZZ4 crate or something...if I used a 350. That engine has a steel crank, its a factory roller cam config....hyperutetic pistons etc.

What do you think would be good compression and a good cam?

Best regards...Stan

Stan's Customs

...zz4 bottom end that is. Really just the block and crank.. maybe forged pistons.

Stan

1997bird

iTrader: (2)

I built a ZZ4 with some AFR 195 Street heads that turned out real nice in a 67' Chevy 1/2 ton 2wd truck. We ran it at 10.54:1 compression and used a custom grind cam w/1.6 ratio rockers. We utilized a air-gap style intake and a Mighty Demon 650 carb.

For your application useing a 350 engine I would suggest the following for your hyd roller cam:

288/296 Adv. Duration
226/234 @0.050" Dur.
.568"/.568" lift with 1.6 ratio rockers
LSA 111*
ICL 106*

Stan's Customs

I never have run 1.6 rockers. Can You tell me what exactly that does. I guess it increases the lift from the looks of the numbers. That would have been almost unstreetable back in the day. Now you can use a roller cam and 1.6 rockes and run A/c with this much lift ?

Stan

Stan's Customs

...forgot to ask. Are we still talking about using the Boss EFI stuff on the Fulie intake with AFR heads and this cam?

1997bird

iTrader: (2)

All day long!! The 1.6 ratio rockers help do several things:
1) more lift
2) starts opening the valves sooner
3) helps enhance mid to upper rpm HP

Stan's Customs

Very nice...what about low rpm torque ...do you still have plenty?

1997bird

iTrader: (2)

Yep!! AFR makes a 180cc int runner with the Vortec bolt pattern.

Stan's Customs

The fuel injection will act as good as the 650 carb you used?.

1997bird

iTrader: (2)

He beat his brother-in-law's 67' Chevy 1/2 ton that had a 421 cube motor running on alcohol, that used to be in his circle track "Modified" race car. He was very surprised that the $21,000 motor couldn't pull on his little 350 street motor. It also goes to say that his brother-in-law was a little upset, b/c he doesn't like to play fair.

1997bird

iTrader: (2)

As long as the ECU is up to the task, a fuel injected motor usually makes more HP and just slightly less TQ.

Stan's Customs

I'm guessing that the E-tec heads would have less HP but more torque because of the 170 runners/then the AFR 180's

Also I'm supposing that either the E-tec or the AFR is superior to the aluminum Fast Burn GM heads ?

I think this may be more like what the car needs. Pretty simple engine...but with all that can be done to tweak it to it's best potential for what it is. Kinda of a sleeper low key every day drivable engine......

Still looking at a little fuel economy.. Are we still alright there?

1997bird

iTrader: (2)

I wouldn't use the GM Fast Burn heads with this combo. They have a 215cc int runner volume, which kills you lower rpm TQ. The Edlebrock E-tec 170 heads are a good head as well, don't waste your time with the E-tec 200's. The AFR's are CNC ported and do have better flow number's. If you get in a money bind situation I would get the E-tec's and pocket port them to help them out with the sand casting mold core shift (every Edlebrock head that I have ported has had this problem). Fuel economy should be still 25+ mpg on the Hwy.

Stan's Customs

OK...Looks like this...?

ZZ4 4 bolt roller cam Block and steel crank

Forged 10.5 pistons (What's a good buy on forged pistons these days?)

AFR 180 Vortec heads

1.6 Rockers

Hyd Roller Cam 568/568 etc. (Custom grind I assume..where can I buy one)

Boss EFI on the Fuelie ASM intake


Is this right ?

Torque, Horsepower, Fuel economy and a/c compatable?

1997bird

iTrader: (2)

Mahle makes a very nice flat top forged piston & piston ring kit for a very reasonable price. http://store.summitracing.com/partde...5&autoview=sku You can find these cheaper at www.ebaymotors.com. I would torque plate hone the block, deck the block & sit it out of the hole .005", and then run a good performance head gasket to get your 10.5:1. If you want that exact cam that I mentined earlier Erson Cams is the manufacturer, www.erson-cams.com. Call them up and give them these grind numbers:
RH288/.355--intake
RH296/.355--exhaust
111*+ 5*