Building A Nostalgic 1970s Fuelie Headed 350 SBC

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ClassicRob
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by ClassicRob »

Well tell us man! What happened?
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by jeff swisher »

Flowmaster mufflers?
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by n2omike »

jeff swisher wrote: Mon May 10, 2021 9:59 am Flowmaster mufflers?
That's what they look like. If it's a cam with significant overlap, the Flowdisaster mufflers could definitely be an issue.
High overlap cams REQIRE a FREE flowing exhaust.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by vortecpro »

IMG_2225.JPG
ClassicRob wrote: Sun May 09, 2021 10:40 am Well tell us man! What happened?
My cam choice was wrong.

242/242/.495/.495/108 1.6 rocker on the intake.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by vortecpro »

n2omike wrote: Mon May 10, 2021 10:04 am
jeff swisher wrote: Mon May 10, 2021 9:59 am Flowmaster mufflers?
That's what they look like. If it's a cam with significant overlap, the Flowdisaster mufflers could definitely be an issue.
High overlap cams REQIRE a FREE flowing exhaust.

Something to consider.
Racing a NA NHRA stocker should be mandatory before any posting.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by KnightEngines »

vortecpro wrote: Wed May 12, 2021 8:25 am IMG_2225.JPG
ClassicRob wrote: Sun May 09, 2021 10:40 am Well tell us man! What happened?
My cam choice was wrong.

242/242/.495/.495/108 1.6 rocker on the intake.
Add 16 deg on intake, 20 deg on exhaust & more lift, little heads = big cam.
Peak tq around 5000rpm indicates peak hp around 6500 if its all working right, you're just short on time/area to get there.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by F-BIRD'88 »

Considering the small cam this is a good realistic result.
It will run very well on the street and at the track.

Dyno sheet date ? What was the correction factor that day?
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by vortecpro »

F-BIRD'88 wrote: Wed May 12, 2021 9:04 am Considering the small cam this is a good realistic result.
It will run very well on the street and at the track.

Dyno sheet date ? What was the correction factor that day?
Thanks, not sure how good a 6100 RPM peak will run LOL, good thing the car has 4.10 gears! Heres a graph of the observed uncorrected power in a 23.50 baro 6400 feet elevation. I think the correction was around 1.28-1.29. I NEVER SET THE DATE, JUST HOW IT IS IN MY SHOP
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Last edited by vortecpro on Wed May 12, 2021 9:18 am, edited 4 times in total.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by vortecpro »

KnightEngines wrote: Wed May 12, 2021 8:55 am
vortecpro wrote: Wed May 12, 2021 8:25 am IMG_2225.JPG
ClassicRob wrote: Sun May 09, 2021 10:40 am Well tell us man! What happened?
My cam choice was wrong.

242/242/.495/.495/108 1.6 rocker on the intake.
Add 16 deg on intake, 20 deg on exhaust & more lift, little heads = big cam.
Peak tq around 5000rpm indicates peak hp around 6500 if its all working right, you're just short on time/area to get there.
I agree, I should have had you pick the cam! I built another engine with a factory stock cam 350 HP 396 cam just to see what would happen, I will probably post that up, it was interesting.
Racing a NA NHRA stocker should be mandatory before any posting.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by PRH »

That’s way more corrected hp than my friends 350 Pontiac Stocker makes......that runs 10’s @3200lbs.
Somewhat handy with a die grinder.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by novadude »

vortecpro wrote: Wed May 12, 2021 9:13 am
I agree, I should have had you pick the cam! I built another engine with a factory stock cam 350 HP 396 cam just to see what would happen, I will probably post that up, it was interesting.
Please do. I like seeing the smooth idle, stock cam stuff.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by 1980RS »

Try a Holley 300-36 Dual Plane intake over the RPM. My 358 ran quicker with the Holley over the RPM intake and pulled to 7200 with ease.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by rustbucket79 »

vortecpro wrote: Wed May 12, 2021 9:08 am
F-BIRD'88 wrote: Wed May 12, 2021 9:04 am Considering the small cam this is a good realistic result.
It will run very well on the street and at the track.

Dyno sheet date ? What was the correction factor that day?
Thanks, not sure how good a 6100 RPM peak will run LOL, good thing the car has 4.10 gears! Heres a graph of the observed uncorrected power in a 23.50 baro 6400 feet elevation. I think the correction was around 1.28-1.29. I NEVER SET THE DATE, JUST HOW IT IS IN MY SHOP
So what exactly is wrong with this? Factory iron and a dual plane intake with a mild cam, what’s not to love? I would have liked to see another 500 or so RPM to see how the power curve looks, but otherwise I see an honest graph showing good effort. =D>
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by vortecpro »

Thanks, I was just hoping for a little more, and a higher peak.
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Re: Building A Nostalgic 1970s Fuelie Headed 350 SBC

Post by n2omike »

A buddy of mine has a 1970 Chevelle. It's still a full weight car with no fiberglass and stock interior. It's powered by an iron headed 355 and runs 7.38 in the 1/8 with antique parts.

Stock block
Heavy 11:1 TRW pistons
950HP carb
Ported Victor Jr.
Phase 2 Chevy Bow-Tie heads. (he spent 16 hours home porting them)
Old solid roller he got in trade with all the parts. Around 0.630" lift. Dirt track style grind.
Shifts at 7k rpm.
8" Converter
400 Turbo
5.13 gear

It runs really well for what it is. He constantly wins the local 7.50 index races. It is still a street car, and he drives it on the road... just within a 20 mile radius of home because of the converter/gear. Engine has been in the car for around 7-8 years at least, and has never been touched.
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