[HWYSTR455]

Originally Posted by besserspat

I have a 360P in my 73 bird, it was the OP that got the original 350P rebuilt by CVS machine shop.... ...

Uh-oh. That may be a big factor here...


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[besserspat]

Originally Posted by HWYSTR455

Uh-oh. That may be a big factor here...


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That must be a cheeky comment... lol

Personally, I didn't even know who they were, but the engine, has CVS stamped all over the head and block. Maybe you know more bout them ?

I had to google it to find out who it was lol. Bought the 73 in Palm springs CA back in 2010. I think CVS machine shop was based in AZ or Texas I dont remember tbh.

The thing runs well thats all I can say.

Peter.

[HWYSTR455]

Sorry, got them mixed up with CVM!


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[chiphead]

I thought CVMS in Virginia had closed, as the owner was in poor health last I heard?

Maybe we need calibrated to what sort of cars the OP is familiar with? A P350 isn't a world beater, but it's no slouch either.

[HWYSTR455]

I heard something about his health too, not sure I buy it, the walls were closing in on him. He did close the biz, at least under the previous name. Heard someone was going to buy the biz, not sure about that either.

Jim is still on FB posting, and he still owes me an engine. But I'm not going there on this forum....

No doubt P350s can run decent, have seen a number of them that do, and have done one myself. Same stroke as a 400 just a smaller bore. There's been builds that were testing limits, and some of those were supposedly making pretty big numbers, comparable to larger engines. Thing is, it costs as much if not more than doing a similar 400 or 455.

Here's one that's not 'big' power but still a contender:

https://www.hotrod.com/how-to/hppp-1...o-engine-build

Ken's 462HP 350 build:

https://www.hotrod.com/how-to/hppp-0...c-engine-build

And this one, 672HP:

https://www.hotrod.com/how-to/672hp-pontiac-350s

But not sure I buy it all, no real 'data'.


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[Squidward]

The links you provided were things I read back when I put mine together. My 350 was a built short block with forged rods/pistons, with plans on doing a single turbo in my 72 Lemans. But engine problems in the Firebird made me change direction to keep that car operable.

So I used the 350 HO as an inspiration, but wanted a more modern cam. Paul Carter recommended the Voodoo cams from his experience and conversations with Harold Brookshire, and I have been satisfied with that choice.

What I have seen here on PY has been wildly different views on what defines a street engine. Engines that do 13 or 14 second quarter miles times, while pretty hot back in the 60's and 70's, make some people yawn with boredom now. I'm more of the boring guy these days, I got tired of chasing every tenth of a second.

I fully support tree-fiddy's.

[Squidward]

https://share.google/images/vKvbiY6oDrOBWSkDJ

[p4msi1]

Originally Posted by HWYSTR455

I heard something about his health too, not sure I buy it, the walls were closing in on him. He did close the biz, at least under the previous name. Heard someone was going to buy the biz, not sure about that either.

Jim is still on FB posting, and he still owes me an engine. But I'm not going there on this forum....

No doubt P350s can run decent, have seen a number of them that do, and have done one myself. Same stroke as a 400 just a smaller bore. There's been builds that were testing limits, and some of those were supposedly making pretty big numbers, comparable to larger engines. Thing is, it costs as much if not more than doing a similar 400 or 455.

Here's one that's not 'big' power but still a contender:

https://www.hotrod.com/how-to/hppp-1...o-engine-build

Ken's 462HP 350 build:

https://www.hotrod.com/how-to/hppp-0...c-engine-build

And this one, 672HP:

https://www.hotrod.com/how-to/672hp-pontiac-350s

But not sure I buy it all, no real 'data'.


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Jim screwed me over years ago, he is a total fake!

[ericwoo]

Well folks, quite a few of you have been pushing me to focus on the carb and you were right. I was hesitant in buying carb after carb unless I was certain it was going to improve because I already tried a 750 dp. Although I tried that carb before I fixed the heads and advanced the cam correctly. Embarrassing to say but it was also a cheap Chinese imitation.

I just bought a used Holley 670 street avenger for a great price and absolutely shocked at the difference. Now this little 350 is one mean running car.

Now I almost think the power is too explosive haha. This set up just wants to shred the tires if I step on it and I have somewhat wide 265 tires.

This carb is only 70 cfm more than my previous one. I am thinking the significant improvement in power is partially because the fuel rail uses a larger 3/8" line. The 600 holley (4160 #0-80457S) carb that I was using has this tiny built in fuel rail to the secondary.

I might consider buying a larger carb to test in the future but I almost dont want any more power. Regardless, I will experiment to different jets sizes in this 670.

I would not be surprised if this car does 13 seconds or less in the quarter mile now. I need to focus on good tires next so will look at drag radials.

Thank you all for helping an amateur. It's been a long journey for me figuring this out. I am now satisfied !

[AG]

Now I almost think the power is too explosive haha. This set up just wants to shred the tires if I step on it and I have somewhat wide 265 tires.

Wash your mouth out with soap.

Better is the enemy of good, if your 670 Holley is running well optimize it and run it.

[Squidward]

Yay!


Adequate street performance is pretty individually defined. I'm in your boat, the 350 in my 'bird is PLENTY when driving around the streets in a city of half a million people. Even blasts from a stoplight barely get to 3rd gear before I cross into the "menace to society" realm. On ramps to the interstate are usually a blast, tho.

All the inner streets here are 45 mph. There is only one track out here. I've had to adjust what I use my car for.

1st gens and x-bodies are great for rowdy 350's.

Glad you cracked the code!!!

[ericwoo]

Originally Posted by AG

Wash your mouth out with soap.

lol yeah I take that back. I was really just concerned with the power being too much for the tires to grip because I am not moving burning out.

I just got back from the track today. I have to launch it not much higher than around 1500-2000 rpm to prevent the tires from spinning too much. I hope to test with drag radials next spring.

Today my best time with the 350 was 13.2 seconds. That's with me starting to let off the gas early because it seems unstable/ unsafe at a high mph. I think I need a front spoiler to help keep the nose down since I put on a rear.

It looks like this thing should be able to do 13 secs or maybe high 12s