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Forum: Tech / General Engine
06-07-2004, 09:11 AM
Replies: 8
Views: 991
Posted By Joshua

I'm not to sure the XE250 would be a big enough...

I'm not to sure the XE250 would be a big enough cam for a 350 with ~9.9CR which is why I chose the XE256. I understand FI would probably give better street/overall mileage but it's not really a...
Forum: Tech / General Engine
06-06-2004, 07:40 PM
Replies: 8
Views: 991
Posted By Joshua

Gas Mileage Combo

Starting next semester I'm going to have to drive 120 miles a day so I would like get better gas mileage. I have 3 different combos to choose from and need some advise deciding.

First
283 bored...
Forum: Carburetors
06-02-2004, 12:10 PM
Replies: 10
Views: 762
Posted By Joshua

If it only opens as much as the engine needs it...

If it only opens as much as the engine needs it to why'd the factory restrict some of them?
Forum: Tech / General Engine
05-31-2004, 04:35 PM
Replies: 27
Views: 2,536
Posted By Joshua

http://www.chevyhiperformance.com/techarticles/415...

http://www.chevyhiperformance.com/techarticles/41598/index4.html
Forum: Transmissions and Drivetrain
05-26-2004, 01:16 PM
Replies: 13
Views: 1,049
Posted By Joshua

I had the same problem with a powertrax + 7.5. ...

I had the same problem with a powertrax + 7.5. This was behind a S10/SB350 automatic. I had a lot of wheel hop so I set up a steering stabilzer mounted on the axle to the connecting to the frame. ...
Forum: TBI
05-26-2004, 05:20 AM
Replies: 62
Views: 2,333
Posted By Joshua

I use the Fel-Pro 1094 .015" shim with ~10.6...

I use the Fel-Pro 1094 .015" shim with ~10.6 compression and have had no problems.
Forum: Tech / General Engine
05-16-2004, 03:47 PM
Replies: 54
Views: 3,298
Posted By Joshua

I'm saying that the distance between 2 - 5...

I'm saying that the distance between 2 - 5 degrees is the same whether you're traveling at 2000 or 5000 RPM. Yes it is different than the distance between 5 - 8 degrees but my point was that the...
Forum: Tech / General Engine
05-16-2004, 02:41 PM
Replies: 54
Views: 3,298
Posted By Joshua

If we were to use a 5.7 inch rod and 3.484 stroke...

If we were to use a 5.7 inch rod and 3.484 stroke as our example you would see that no matter the RPM the distance traveled between let's say 2 degrees to 5 degrees would always be the same. You...
Forum: Tech / General Engine
05-16-2004, 12:12 PM
Replies: 54
Views: 3,298
Posted By Joshua

When I work it out for a 5.7 rod and 3.484 stroke...

When I work it out for a 5.7 rod and 3.484 stroke I get ~74.25 degrees to be where maximum piston velocity occurs. The only time I see the maximum occuring at 90 is when rod length approaches...
Forum: Tech / General Engine
05-16-2004, 11:35 AM
Replies: 54
Views: 3,298
Posted By Joshua

How do you figure that maximum piston velocity is...

How do you figure that maximum piston velocity is at 90 degrees?
Forum: Carburetors
05-05-2004, 02:33 PM
Replies: 10
Views: 962
Posted By Joshua

I have used the Performer and Performer RPM Air...

I have used the Performer and Performer RPM Air Gap intake on my Vortec 350. The rest of the combo included a XE268 cam retarded 4 deg 1.6 rr, Hooker SuperComp Heads, ~10.5 comp, Holley 700 DP, 4.10...
Forum: Carburetors
03-23-2004, 10:36 PM
Replies: 27
Views: 3,626
Posted By Joshua

Cool air is better. I've done back to back tests...

Cool air is better. I've done back to back tests and gained 2 tenths.
Forum: Tech / General Engine
03-14-2004, 08:39 PM
Replies: 38
Views: 1,079
Posted By Joshua

The dynamic compression ratio on the 350 would...

The dynamic compression ratio on the 350 would still be higher compared to a 305.
Forum: Tech / General Engine
03-14-2004, 03:26 PM
Replies: 38
Views: 1,079
Posted By Joshua

Are you really seroius? You're telling me that...

Are you really seroius? You're telling me that if you put 58 cc heads with a 6 cc dish pistons in a 350 and a 305 that the 305 would have higher compression?
Forum: Tech / General Engine
03-14-2004, 08:40 AM
Replies: 38
Views: 1,079
Posted By Joshua

Just think about it this way. A 350 is just a...

Just think about it this way. A 350 is just a bored out 305. All things being equal you really think the 305 will have the higher compression ratio?
Forum: Tech / General Engine
03-14-2004, 03:03 AM
Replies: 38
Views: 1,079
Posted By Joshua

Larger bore = higher compression ratio

Larger bore = higher compression ratio
Forum: Tech / General Engine
01-20-2004, 03:52 AM
Replies: 13
Views: 2,197
Posted By Joshua

Try disconnecting the vacuum advance and see if...

Try disconnecting the vacuum advance and see if that improves or decreases gas mileage.

Have you checked the primary rods recently? A rod that is REALLY bent would also kill gas mileage.
Forum: Tech / General Engine
01-07-2004, 01:28 AM
Replies: 32
Views: 10,074
Posted By Joshua

While rod length is important when you talk about...

While rod length is important when you talk about dwell time so is stroke. I believe the shorter stroke of 3.25 vs 3.484 had a much bigger impact on dwell time than the rod length in that article. ...
Forum: Tech / General Engine
01-02-2004, 02:14 PM
Replies: 7
Views: 711
Posted By Joshua

Idle is good and there's plenty of low end grunt.

Idle is good and there's plenty of low end grunt.
Forum: Tech / General Engine
01-02-2004, 12:02 PM
Replies: 7
Views: 711
Posted By Joshua

With Vortec heads, Performer intake, XE268 cam,...

With Vortec heads, Performer intake, XE268 cam, Q-Jet 750 and I was able to get down to the 12.6s. Just recently put on a Performer RPM with a Holley 700 DP and can't wait to see what I run now.
Forum: Carburetors
12-22-2003, 09:49 PM
Replies: 2
Views: 1,751
Posted By Joshua

I wasn't really looking for a "magic" number just...

I wasn't really looking for a "magic" number just a good place to start the tuning from. Thanks for the info!
Forum: Carburetors
12-22-2003, 07:59 PM
Replies: 2
Views: 1,751
Posted By Joshua

Another Holley Question

I have a Holley 4778-2 and would like to start out with the stock jetting of 66/76. I noticed that the 4778-3 & 4778-4 have 69/78 jets. Does anyone know what the difference is or what the #s -1,...
Forum: Tech / General Engine
12-09-2003, 01:03 AM
Replies: 4
Views: 607
Posted By Joshua

Part of the reason is the headers. The other is...

Part of the reason is the headers. The other is that the roller cam is no bigger than the hydraulic yet it has bigger heads and a single plane intake. The restriction is with the cam/headers not...
Forum: Tech / General Engine
12-04-2003, 03:46 PM
Replies: 9
Views: 392
Posted By Joshua

It's not for Vortec heads though.

It's not for Vortec heads though.
Forum: Tech / General Engine
12-04-2003, 03:39 PM
Replies: 9
Views: 392
Posted By Joshua

Thanks for the help. My main concern is that I...

Thanks for the help. My main concern is that I have a Q-Jet and a Holley Q-Jet replacement and those don't work on a Performer RPM. I also have a 700 DP and a Holley VS 750 but I'm afraid gas...
Forum: Tech / General Engine
12-04-2003, 10:46 AM
Replies: 9
Views: 392
Posted By Joshua

Would adding a 1/2 inch open spacer help the...

Would adding a 1/2 inch open spacer help the problem? What if I cut down the divider 3/4 of an inch? Or is my only solution to go with the Performer RPM?
Forum: Tech / General Engine
12-04-2003, 10:09 AM
Replies: 9
Views: 392
Posted By Joshua

Performer Intake

I have a 350 with Vortec heads, XE274 cam retarded 4 deg, Rhoads lifters, Hooker SuperComp headers, and a Performer intake.

Now at 5000 RPM WOT Vacuum goes to 1 in. and by 6000 it's at 2. I...
Forum: Carburetors
11-30-2003, 11:24 AM
Replies: 2
Views: 5,396
Posted By Joshua

I was thinking that may be the case but I had...

I was thinking that may be the case but I had never heard anyone mention it before. Yeah it's a 6210-3.
Forum: Carburetors
11-30-2003, 01:02 AM
Replies: 2
Views: 5,396
Posted By Joshua

Holley 4165 Tuning

I recently switched from a Q-Jet 750 to a Holley 4165 650 cfm which is a Q-Jet replacement. It has mechanical secondaries and when I slam it at idle it'll die out. I've had ZERO experience with...
Forum: Tech / General Engine
11-23-2003, 02:50 AM
Replies: 17
Views: 2,405
Posted By Joshua

Rhoads lifters make A LOT of noise. Kinda sounds...

Rhoads lifters make A LOT of noise. Kinda sounds like a couple bad exhaust leaks. I don't know how much something with a knock sensor would like that.
Forum: Tech / General Engine
10-31-2003, 12:03 AM
Replies: 16
Views: 5,264
Posted By Joshua

More than likely that setup is not going to get...

More than likely that setup is not going to get you into the 12s. You'd need a great 60 ft better than perfect weather conditions and a tailwind. A 305 doesn't need big heads Vortecs would be more...
Forum: Tech / General Engine
10-12-2003, 03:45 PM
Replies: 13
Views: 11,396
Posted By Joshua

Good luck. Keep us updated!

Good luck. Keep us updated!
Forum: TPI
10-10-2003, 01:09 AM
Replies: 32
Views: 2,739
Posted By Joshua

Everything you wanted to know about compression...

Everything you wanted to know about compression and more

http://www.boyleworks.com/ta400/psp/compression.html

Dynamic CR calculator

http://cochise.uia.net/pkelley2/DynamicCR.html

Of...
Forum: TPI
10-09-2003, 11:13 PM
Replies: 32
Views: 2,739
Posted By Joshua

http://purplesagetradingpost.com/sumner/techinfo/3...

http://purplesagetradingpost.com/sumner/techinfo/350%20chevy%20engine.html
Forum: Tech / General Engine
10-09-2003, 10:42 AM
Replies: 13
Views: 11,396
Posted By Joshua

True dual 2 1/2 with a Dr. Gas X pipe both times.

True dual 2 1/2 with a Dr. Gas X pipe both times.
Forum: Tech / General Engine
10-09-2003, 01:18 AM
Replies: 13
Views: 11,396
Posted By Joshua

http://www.chevyhiperformance.com/techarticles/678...

http://www.chevyhiperformance.com/techarticles/67838/

LT4 HOT cam 412 hp 423 torque

http://www.73-87.com/chp/gm3505.htm

XE268 402 hp 415 torque

Not the exact same engines but you can...
Forum: TBI
10-06-2003, 12:22 AM
Replies: 58
Views: 1,927
Posted By Joshua

Nice times. How much does the car weigh with...

Nice times. How much does the car weigh with driver?
Forum: Carburetors
09-25-2003, 03:26 AM
Replies: 7
Views: 739
Posted By Joshua

Yes I could see that as a possibility. If it was...

Yes I could see that as a possibility. If it was though then there would still have to be a difference when using the CS and CC rods wouldn't there? Also using the B hanger would of allowed them to...
Forum: Carburetors
09-24-2003, 02:33 PM
Replies: 7
Views: 739
Posted By Joshua

Q-Jet Questions

I currently have a Q-Jet 750 on a SBC 350. I go to test&tune night all the time but something is happening that I can't really figure out and I'm wondering if someone can help me.

This last...
Forum: TPI
09-03-2003, 05:22 PM
Replies: 5
Views: 649
Posted By Joshua

I'd go with the XE262H. I don't think TPI would...

I'd go with the XE262H. I don't think TPI would be able to take much advantage of anything bigger than that.

#12-262-4
"Good for TPI 305 or 350 with aftermarket chip and upgraded exhaust"
Forum: TPI
08-24-2003, 03:05 AM
Replies: 7
Views: 944
Posted By Joshua

http://www.compcams.com/catalog/056_057.html ...

http://www.compcams.com/catalog/056_057.html

XE256H-12 looks good
Forum: TPI
08-05-2003, 11:57 AM
Replies: 21
Views: 2,676
Posted By Joshua

Dual 2 inch is kind of small if you're going past...

Dual 2 inch is kind of small if you're going past 5000 RPM.
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