[PontiacJim1959]

Here is a 350/383 stroker build - 462 horsepower at 6,100-rpm and 436 lb-ft of torque at 4,400 rpm.

https://www.hotrod.com/articles/hppp...-engine-build/

[PontiacJim1959]

Originally Posted by Stan Weiss

On the Fulper engine do they give cam spec's? Does it say at what RPM it made 540 HP?

Stan

No, I don't recall if it had the specs or I would have them - might have been a "Fulper Secret."

There was another article done on the same engine using nitrous, 672HP. The cam specs are listed and may be the same for above.

Comp Cams Solid HR.
Duration at .020" - 285/Int, 296/Ex
Duration at .050" - 255/Int, 260/Ex
1.5 rockers - Lift .538" Int, .538" Ex (these numbers not clear, but under .580")
Lobe Center Angle - 108 degrees
Installed Intake Centerline - 100 degrees

No cam expert, but do the .020" and .050" numbers look true - this is what was shown in the article. Maybe backwards?

More specs on this engine included in the text. Keep in mind, these HP/TQ numbers were not necessarily accepted by others.

[Stan Weiss]

Originally Posted by PontiacJim1959

No, I don't recall if it had the specs or I would have them - might have been a "Fulper Secret."

There was another article done on the same engine using nitrous, 672HP. The cam specs are listed and may be the same for above.

Comp Cams Solid HR.
Duration at .020" - 285/Int, 296/Ex
Duration at .050" - 255/Int, 260/Ex
1.5 rockers - Lift .538" Int, .538" Ex (these numbers not clear, but under .580")
Lobe Center Angle - 108 degrees
Installed Intake Centerline - 100 degrees

No cam expert, but do the .020" and .050" numbers look true - this is what was shown in the article. Maybe backwards?

More specs on this engine included in the text. Keep in mind, these HP/TQ numbers were not necessarily accepted by others.

Jim,
Thanks. Yes for those 0.020" numbers the 0.050" numbers are possible.

Stan

[Stan Weiss]

Originally Posted by F/S GTO

All I'm going to say it's sintered iron!��

Adam,
Thank you,

Stan

[cgeise]

back in the early 70.s I had a 69 Custom S with the 330 hp 350 and a 4 speed with 3;55 posi -- It was a beast and ran with almost anything around. Had 48 heads If I remember correctly .

[Jay S]

The very first 350 we built I remember being totally caught off guard how well it ran. Years ago we built some 455 Pontiacs to run in a street stock class dirt track that you could run any combination that the factory did as long as you had a cast iron intake, factory carb and exhaust manifolds, no roller rockers or head porting. But no cube limit. It was a blast to watch, because it put brands against brands and there was a good representation of Ford, Mopars, and Chevies.

We were learning yet and a car we were sponsoring had a 455 came apart. So to keep in the points race we ‘thru’ a 350 Pontiac together out of parts we had laying around. We completely expected the car to be lap traffic, but it wasn’t. It was not near as speedy coming out of the corners to the solid cam 462 and 466 the car usually had. But by mid track it ran with all the other cars. Most everyone still thought it had the 455 in it yet. Using what we had laying around: 350 with a set of big valve 96s milled .070, the compression couldn’t have been very high, mid to upper 8s scr, ram air manifolds, stock intake and a q jet. I don’t know what the specs for the cam where, maybe someone on the forum does. It was a Isky solid roller cam ground in the mid 60’s. We ran 1.65 rockers. (Rules didn’t say anything about roller cam )I remember the cam was called a Isky 505. It was the same cam that set the national et record in the mid 60s by the white 64 stan long sponsored tempest. It sounded awesome, and we were shocked how well it ran

[quick67bird]

I ran a 350 back in the mid 90s with 670 heads that had a home port job. They flowed 240 cfm at .550 lift. My Firebird had 4.11 gears with a turbo 400 for a transmission. My torque converter was a bit too tight for the comp 295s cam, but it came on strong after the initial bog of not quite being in the power band. At Topgun raceway in Fallon, NV it ran a 13.40 at 106 mph. That track is about 4000 foot of elevation and has a DA of 8000’. A lot of people thought I had NOS do to how the car came on when it finally got in the RPMs the cam wanted to operate at.

[PONTIAC LARRY]

Decades back my buddy Paul and I put together a garbage smog 350 short-block from a sludged 73-76-ish vintage one that was under a table at a high school shop class. We cleaned it with Easy Off oven cleaner and put new rings after a drill glaze breaker hone and re bearing same size. I got a old used 125000 mile #066 cam from a 68 428 I had pulled and we used that, A set of #62 big valve heads and it went into a 78 Grand Am with log manifolds a stock stall th350 and a open 3.73 monte carlo ss rear .. car actually ran a 14.3 or 14.4 @ 95 like that in street trim. Fast forward to 2020 and met a Abilene bracket racer with a beater 69 lemans that was a 330 hp 350 HO 4 spd 3.55 car but by now was a still a 350 but a automatic with 10" converter a 224 ish cam and 4.11 gears , a 600 edelbrock. I think he had #13 or 670 heads now, Old motor had freeze cracked in half and only had 1 one 48 head when he got it. That car gets ran a lot in NHRA brackets and he went to Memphis for finals this year. Car has gone a best of 8.1 in the 1/8th at my local XRRP track and often 8.2's with a 12.9 1/4 it did some time years back,, a legit simple 12 sec 350 lemans !

[Half-Inch Stud]

my 1968 350 ran strong on the original 2bbl and also the 4bbl. Had the original dividered cast iron manifolds. Great engine.

Was miffed when studying PMD parametrics and found the common crank for 326-400. Pro-400 mindset. But i skipped 400s in my stuff.

428 and 455 sure had more TQ, low end, and surely more HP.

[Way2qwk4u]

Here are the dyno numbers on my 350 in my lemans. Just had it done end of the year. Not bad for a 40 year old rebuild.

[ponyakr]

Originally Posted by wbnapier

For those of you interested, this gentleman has a multiple series Pontiac 350 build on Youtube. The first video: https://www.youtube.com/watch?v=cdNhF-UCsX4

In lookin back thru this thread, I saw this link to the 350P video series. Although the guy was obviously not a Pontiac guy, I enjoyed the series.

So, that got me to wondering if there were any other good 350P videos on You Tube. Just ran across this series. Since I never worked in a machine shop, I really enjoyed seeing some of the engine building machines in action.

This particular video is about grinding the crank rod journals. For others like me who have never really seen what's involved, you may enjoy it.

https://www.youtube.com/watch?v=12UdcpXHxPM

This one is grinding the main journals.

https://www.youtube.com/watch?v=GLDO56liwsI

Balancing the assembly & polishing the crank.

https://www.youtube.com/watch?v=zwDRGNNl5qk

Shortblock assembly. Methods & opinions differ.

https://www.youtube.com/watch?v=TnyrvGtMIfA

[Donovan]

Sure thing... this may well be the ultimate Pontiac 350 build and it's currently under way. Spoiler, his plans include aluminum rods and heads.

Pontiac 350 Dyno Mule Disassembly....

https://www.youtube.com/watch?v=XpwN7XIVMYs

Pontiac 350 Dyno Mule Update...

https://www.youtube.com/watch?v=Qc2xemg-Mro&t=193s

Pontiac 350 Project PJ Connecting Rod Overview

https://www.youtube.com/watch?v=g4zGeVfM7Z4&t=55s


This builder does a lot of work with FE builds, seems fitting since I've always felt Pontiacs and FEs have a lot in common.

[Stan Weiss]

Originally Posted by Donovan

Sure thing... this may well be the ultimate Pontiac 350 build and it's currently under way. Spoiler, his plans include aluminum rods and heads.

Pontiac 350 Dyno Mule Disassembly....

https://www.youtube.com/watch?v=XpwN7XIVMYs

Pontiac 350 Dyno Mule Update...

https://www.youtube.com/watch?v=Qc2xemg-Mro&t=193s

Pontiac 350 Project PJ Connecting Rod Overview

https://www.youtube.com/watch?v=g4zGeVfM7Z4&t=55s


This builder does a lot of work with FE builds, seems fitting since I've always felt Pontiacs and FEs have a lot in common.

I maybe wrong, will not be the first time. But I believe Brent Lykins was a member here and got band for some reason.

Stan

[POS Racing]

Current build is std bore 350 with ancient TRWs and SIR rods. Flat tappet cam and ported 17 heads. 8.8 comp Dynoed at 380hp/420tq. In my 73 Ventura street/strip car it has run 12.49@107 on 89 octane in crappy air.

Version 2.0 is nearing completion. Much lighter rotator, hand ported KRE D-ports which I bought as 65cc chamber to be able to fit it to the small bore. Roller cam. Also currently installing a bar along with suspension upgrades . Shooting for low 11s with a pump gas 350P

[pastry_chef]

Originally Posted by Stan Weiss

I believe Brent Lykins was a member here and got band for some reason.

Stan

Brent is a very experienced builder across many brands, some did not have an open mind to information he shared. Brent left out of frustration but should not have been locked out.

I suspect many of the same who disliked Brent would bite at Tony (BES) or Kaase if this forum was to be so blessed with their presence. There is nothing 'same old' about them, they are cutting edge, science and fact based. Same as Vizard.

[darbikrash]

Originally Posted by POS Racing

Current build is std bore 350 with ancient TRWs and SIR rods. Flat tappet cam and ported 17 heads. 8.8 comp Dynoed at 380hp/420tq. In my 73 Ventura street/strip car it has run 12.49@107 on 89 octane in crappy air.

Version 2.0 is nearing completion. Much lighter rotator, hand ported KRE D-ports which I bought as 65cc chamber to be able to fit it to the small bore. Roller cam. Also currently installing a bar along with suspension upgrades . Shooting for low 11s with a pump gas 350P

Would you have the cam specs on the flat tappet that you used in v1.0?
I just picked up a ‘69 Firebird with a 350, and I’d like to build it up.

[POS Racing]

Yup

Howards Rattler. I used solid lifters on it and lashed at .006 intake/ .008 exh. Sounds healthy and super torquey/responsive.

[POS Racing]

Sorry I got a little behind on this. Dynoed the 350P version 2.0 back in January. It made 584hp/522tq! 10.7 comp on 93 octane.

Got the Ventura finished and to the 1/8mi track over the weekend. Best of 7.19@94.5 so far at 3,450lbs through exhaust. Converter is a bit tight and still have s lot of tuning to try. Swapped the PP Crosswind that made the prettiest dyno curve for the Victor that made the highest peak numbers and lost a TENTH! Tuning was limited Sunday as my wife bumped me out of my normal bracket ride so I jumped into competition with the Ventura and went 5 rds🙂

Back to the dual plane and a few other small changes this week then going to Mason Dixon for some 1/4mi fun. Updates soon

[Steve C.]

From post #26- "I don’t know what the specs for the cam where, maybe someone on the forum does. It was a Isky solid roller"

Jay, Not sure if its the same Isky solid roller but back in 2019 you mentioned a Isky solid roller from their 901 series. It was a single pattern with 290/290 advertised.
The .050" duration was 252/252 and ground with a 112 lobe separation.
The lobe lift was 0.3170" and 1.65 rockers . The cam card suggested 0.025" lash.

The grind # was RR-505c62


.

[Jay S]

Steve the cam in the 350 was a little bigger with more lift. I recall it had around .34” lobe lift, i don’t know the exact specs.