Help building 350
Thread Starter
Instructor
Joined: Jun 2002
Posts: 201
Likes: 0
From: Va. Beach Virginia
Help building 350
I am in the process of making the decision on what to build. I have access to a virgin 4 bolt main 350 block that I am going to build to put in my 74 the engine in it now is orginial. I autocross the car and am looking for more ponies.
Info
The car is a convertible 4 speed manual. All parts are stock.
I am going to rebuild the Power steering control valve (leaks) and repalce brake pads and install steel braided lines. I am also installing the VB&P grand touring plus suspension kit.
Do you guys have any idea as to what to build the 350 with.
I plan on boring over 30 and need it to still be streetable and have enough vac.
I was thinking about the Performer RPM Alum heads 70cc ( have a good price on a new set $700)
As I said this will be for autocrossing and the occasional date night with the wife.
Thanks for any help
Tony
I have DD2000 so I will be able to compare any setups you guys suggest.
Info
The car is a convertible 4 speed manual. All parts are stock.
I am going to rebuild the Power steering control valve (leaks) and repalce brake pads and install steel braided lines. I am also installing the VB&P grand touring plus suspension kit.
Do you guys have any idea as to what to build the 350 with.
I plan on boring over 30 and need it to still be streetable and have enough vac.
I was thinking about the Performer RPM Alum heads 70cc ( have a good price on a new set $700)
As I said this will be for autocrossing and the occasional date night with the wife.
Thanks for any help
Tony
I have DD2000 so I will be able to compare any setups you guys suggest.
Pro
Joined: Feb 2002
Posts: 500
Likes: 0
From: sebastopol ca
Re: Help building 350 (seansod)
hmmm, autocross you say? you probabely want a more radical cam then, u cant really go wrong calling comp cams and asking what cam they'd recommend. if you're using RPM heads you might as well use the RPM air gap intake as well
Burning Brakes
Joined: Oct 2001
Posts: 1,146
Likes: 0
From: Milford NH
Re: Help building 350 (seansod)
Where does you engine spend most of it's time during racing? Better yet, went you come out of a corner and want to step on it, what RPM is the engine at? You have many different options. Sounds like fun!
Thread Starter
Instructor
Joined: Jun 2002
Posts: 201
Likes: 0
From: Va. Beach Virginia
Re: Help building 350 (69stingray)
Just got back form autocrossing today (boy was it cold) and looked at the Tach it appears that when leaving a corner I am at around 3500 RPM.
Burning Brakes
Joined: Oct 2001
Posts: 1,146
Likes: 0
From: Milford NH
Re: Help building 350 (seansod)
My first thought was 383 so you can still have some torque for driving on the street, but a 355 w/ 6" Rods will give you a better Rod/Stroke ratio.
I would suggest AFR 210 Heads. They should breath enough to get you the HP you need on the track but still be street worthly (I think).
For cam, I would see what Comp Cam 288HR looks like. I think it is as radical as you can go.
The intake is a toss up, I think overall you will like the Victor Jr. better on the track. Also, a 10:1 compression ratio. If you want to add a fuel additive, maybe a 11:1. Start with 1-3/4" headers.
Try this combo in Dyno2000:
355 w. 6" Rod
AFR 210 Heads
Flow Numbers:
0.2 Lift = 135/112 Intake/Exhaust
0.3 Lift = 197/145
0.4 Lift = 245/185
0.5 Lift = 273/205
0.55 Lift = 277/210
0.6 Lift = 282/215
Comp Cams 288HR Cam Specs: http://www.compcams.com/information/...umber=12-433-8
Gross Lift: 0.52 Intake 0.54 Exhaust
Duration @ 0.006 = 288/294
Valve Timing @ 0.006:
Intake 38 open 70 close
Exhaust 81 Open 30 close
106 Intake centerline
110 Lobe Seperation
Victor Jr. Single Plane Intake
850 Holley
[Modified by 69stingray, 7:02 PM 1/12/2003]
I would suggest AFR 210 Heads. They should breath enough to get you the HP you need on the track but still be street worthly (I think).
For cam, I would see what Comp Cam 288HR looks like. I think it is as radical as you can go.
The intake is a toss up, I think overall you will like the Victor Jr. better on the track. Also, a 10:1 compression ratio. If you want to add a fuel additive, maybe a 11:1. Start with 1-3/4" headers.
Try this combo in Dyno2000:
355 w. 6" Rod
AFR 210 Heads
Flow Numbers:
0.2 Lift = 135/112 Intake/Exhaust
0.3 Lift = 197/145
0.4 Lift = 245/185
0.5 Lift = 273/205
0.55 Lift = 277/210
0.6 Lift = 282/215
Comp Cams 288HR Cam Specs: http://www.compcams.com/information/...umber=12-433-8
Gross Lift: 0.52 Intake 0.54 Exhaust
Duration @ 0.006 = 288/294
Valve Timing @ 0.006:
Intake 38 open 70 close
Exhaust 81 Open 30 close
106 Intake centerline
110 Lobe Seperation
Victor Jr. Single Plane Intake
850 Holley
[Modified by 69stingray, 7:02 PM 1/12/2003]
