Okay here is what I have calculated for my 350 Block and what it will have on it. I don't have the heads or cam yet, and I want to make sure this is going to all work well. NOTE: This is a Tuned Port Injecton setup. I want it to go fast, but be economical etc:

Intake:
SLP intake Runners
Ported plenum
Base/Runners/Plenum port matched
MAF style TPI
19LB Injectors at 50PSI
'85 TPI Distributor
53,000 Volt Coil
Accel Ignition Control Module

Exhaust:
Hedman 1 3/4" Headers
3" Y pipe
Hi-Flow Cat
Flowmaster

Transmission:
Rebuilt 7004R Corvette Servos etc
Stock Torque Converter

Rearend:
3.42 Posi 10 Bolt

Block Calculations: (using Pat Kelley's CRC)
350
4.004" Bore
3.48" Stroke
5.7" Rod Length
58CC Heads 1.94/1.50
.041 Head Gasket
4.166 Head Gasket Bore
.015 Deck Height
14CC Stock 4releaf Dished Pistons(Could be wrong on the volume)
.056 Quench

Comp Cams XE262H-14 (CCA-12-262-4)
Hydraulic Tappet
262/270 ADV Dur
218/224 @.05 DUR
464/470 Lift
114º Lobe Sep

Yeilds:
9.52:1 SCR
7.72:1 DCR


Sound good? I think that it means I can use pump gas, yes?

ANY input would be GREATLY Appriciated. This is my first motor build up. I'm getting rid of the 305 with the horibble "peanut" cam.

Thanks!
-Paul

 

The headers are long tubes. You will need an O2 sensor for the TPI. Heated version typically recommended for use in long tubes.

Any particular reason you're going with 58cc chambers and dished pistons? 64cc and flat tops makes a little more sense.

4.004" bore doesn't sound right. I'd believe 4.040".

 

I'm not sure exactly about the headers... but they are shorties and hedmans. They have AIR tubes and an O2 sensor.

I'm going with 58 CC and dished pistons... because my block came with dished pistons and It's going to be spendy enough. Though I think I might be able to afford Vortec heads/base.

My bore wa mic-ed at 4.004 it's been honed. There wasn't any cylinder damage.

 

Hedman shorties are 1-5/8" primary tubes. Should have the O2 sensor, but I'm not completely sure the non-A.I.R. headers do have that (I know the Hooker shorties w/o A.I.R. do have the O2 sensor). I haven't heard great things about the Hedman y-pipe, but I haven't seen one, either.

What heads were you thinking of using? Before I spent the money on Vortecs and a Vortec-specific base, I'd bore the block, put in new hypereutectic flat-top pistons, and use 64cc heads (which the Vortecs are, anyway). Properly set-up Vortec heads and base are going to cost you around $900-1000.

 

I have the same cam in my TBI Engine. I built a 350. I'm about 300 hp and 375 lbs fet of torque. You will see a little bit more power and torque because of the accuracy of the TPI. I would use 24 lbs fuel injectors. THat's what the 350 TPI uses. If possible get Vortec heads with Scoggin Dickey's Base manifold. It's designed for it and with you're cam it will make a good 350 hp. I'm running 87 octane, I have no knock or ping. I have a 5 speed with a 3.08 locker. I can burn out and take off pretty good. I have no engine knock or ping.

 

Factory 350 TPI uses 22 lb injectors.

 

With the heads, my other option is spending $475 on a Basic cast set of 305 heads with 1.94/1.50 valves.

So even with that I wouldn't have the money needed to bore the block, it's over $500 here. My block is in good shape, with new rings and bearings.

I priced the vortec setup... $399 base, $320 heads, and then $80 for bolts and gaskets. And it will flow tremendously better. So I've read and see flow charts.

http://www.tunedport.com/Streetstories/choosingtpi2.htm

Good site full of info there says I can just turn the fuel pressure up on my 19lb injectors.

Also, this way I wont have to change my chip right away.

 

And I don't really think I'll be at 300 horse... would I?

 

Probably.

The Vortec heads should have upgrade work done to them for the lift of that cam - springs, retainers, valve guides cut down. Screw-in rocker studs also a good idea (as is the case with any factory head and higher lift).

 

http://www.sdpc2000.com/cart.asp?act...d=277&pid=9063

I was going to go with that bad boy.