Speed-Talk is running on www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

400 horse, 350 head question

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
Dragsinger
Expert
Expert
Posts: 599
Joined: Mon Aug 25, 2008 9:38 pm
Location:

400 horse, 350 head question

Post by Dragsinger »

A customer needs a set of SBC 350 heads that will make no more than 400 horsepower. It will be in a 3200-pound car and the 1/8 mile ET around 7.30 or 11.60 1/4 mile.

I will use a flat top piston and flat tappet cam of about .570 lift with a tight 8" converter and Powerglide. Around a 4.56 - 4.88 rear gear.

What head will suit that performance?

Thanks, Larry Woodfin
Larry Woodfin - Team Woodfin Racing - Owner, Woodfin Automotive
lefty o
Guru
Guru
Posts: 3131
Joined: Tue Oct 15, 2013 8:50 am
Location:

Re: 400 horse, 350 head question

Post by lefty o »

whats his budget? honestly for 400hp even most of the 70's smogger heads will get there. for a few bucks more there are plenty of offshore aluminums, and for a couple more edelbroc perf rpm heads. now just me thinking, but in the real world thats gonna have to be one perfectly dialed in car with perfect conditions to lay down an 11.60 from 400hp 350 in a 3200lb ride.
User avatar
BOOT
Guru
Guru
Posts: 1964
Joined: Fri Apr 09, 2010 6:23 pm
Location: Michigan

Re: 400 horse, 350 head question

Post by BOOT »

I don't know the part number but what bout 604 crate heads
Channel about my projects https://www.youtube.com/user/BOOT350V

I know as much as I can learn and try to keep an open mind to anything!

If I didn't overthink stuff I wouldn't be on speedtalk!
MELWAY
Expert
Expert
Posts: 937
Joined: Mon Dec 04, 2006 7:37 pm
Location: melbourne australia

Re: 400 horse, 350 head question

Post by MELWAY »

Dragsinger wrote: Mon Jan 18, 2021 12:10 am A customer needs a set of SBC 350 heads that will make no more than 400 horsepower. It will be in a 3200-pound car and the 1/8 mile ET around 7.30 or 11.60 1/4 mile.

I will use a flat top piston and flat tappet cam of about .570 lift with a tight 8" converter and Powerglide. Around a 4.56 - 4.88 rear gear.

What head will suit that performance?

Thanks, Larry Woodfin
I have used a few sets of dart 165 ss 67cc heads with big valves on flat top 355 chevs. And make 420-460hp with small solid cams
They great iron replacement head
3370lb Sedan 9.89@136MPH 358chevN/A
Monza355
Pro
Pro
Posts: 315
Joined: Sat Dec 07, 2013 6:06 pm
Location:

Re: 400 horse, 350 head question

Post by Monza355 »

Dragsinger wrote: Mon Jan 18, 2021 12:10 am A customer needs a set of SBC 350 heads that will make no more than 400 horsepower. It will be in a 3200-pound car and the 1/8 mile ET around 7.30 or 11.60 1/4 mile.

I will use a flat top piston and flat tappet cam of about .570 lift with a tight 8" converter and Powerglide. Around a 4.56 - 4.88 rear gear.

What head will suit that performance?

Thanks, Larry Woodfin
I would say a powerglide would like more of a loose converter than tight. Is this a bracket/index deal ?
SpeierRacingHeads
Vendor
Posts: 479
Joined: Sun May 13, 2012 1:28 pm
Location:

Re: 400 horse, 350 head question

Post by SpeierRacingHeads »

I just built a 355 for my FIL with a Howards FT 215/225 cam and a set of 195cc ProFilers.

Runs great.

Like I said, have 50 sets in stock.
Speier Racing Heads
Chad Speier
785-623-0963
User avatar
mt-engines
Pro
Pro
Posts: 331
Joined: Fri Sep 27, 2019 12:35 pm
Location: MN

Re: 400 horse, 350 head question

Post by mt-engines »

EQ 180cc heads
Trick flow super 23 175cc heads
Flowtek 180
Dart 180
stock vortec
any stock casting with 1.94" valve and some port work, pretty hard to not make 400hp

mid 220@.050 cam and .500" lift will get you there
PRH
Guru
Guru
Posts: 1005
Joined: Fri Sep 08, 2017 4:16 pm
Location: S. Burlington, Vt.

Re: 400 horse, 350 head question

Post by PRH »

There’s one on the dyno here now.......
9.9cr, pump gas, E-street heads straight ootb, rpm intake, 750 Holley, 1-5/8 to 1-3/4 x 3 dyno headers, middle thumper hft cam(235/249-107)...... basically makes 425/425.

The build criteria was; pump gas, 400hp, rough idle.
Somewhat handy with a die grinder.
Post Reply