Head replacment recommendations
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
A lot of modern heads are pretty good n better with a bit of work. For street mild stuff I suggest small runners like 180ish and if you can tune and want to be more racey then 200cc The NEW version of the Dart SHP 180 is nice and one of the better out of the box ready to go heads, 64cc tho the bigger 72cc they sink the valves to make the chamber larger. AFR(Enforcers) is the best version of the generic ebay 200cc castings in my opinion But their VJ n such favors larger cams. Trickflow or Speedway Motors have camel hump versions if you wanna have some modern head advantages(design) but retain classic look.
Actually considering buying a set of the Summit iron heads for my truck project BUCK cause I'm tired of trying to find decent used vortecs. Summit heads are Dart S/S-iron eagles basically.
https://youtu.be/42R26b6_sjg
Actually considering buying a set of the Summit iron heads for my truck project BUCK cause I'm tired of trying to find decent used vortecs. Summit heads are Dart S/S-iron eagles basically.
https://youtu.be/42R26b6_sjg
why is it Dart only tells you flow at one opening height, presumably the best flow? No mention of test conditions or bore size, very lean on info here.
I have a set of the origional Dart SHP’s. Disappointing to say the least. Quality was mediocre to poor. For the same money you can do a lot better elsewhere I bet.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
THis is a pretty good list last updated in 2018. the manufacturers part number lists the part adn the person who did the flow data
http://www.users.interport.net/s/r/s...ehdc.htm#Chevy
pretty good info and lots of heads
http://www.users.interport.net/s/r/s...ehdc.htm#Chevy
pretty good info and lots of heads
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
why is it Dart only tells you flow at one opening height, presumably the best flow? No mention of test conditions or bore size, very lean on info here.
I have a set of the origional Dart SHP’s. Disappointing to say the least. Quality was mediocre to poor. For the same money you can do a lot better elsewhere I bet.
I have a set of the origional Dart SHP’s. Disappointing to say the least. Quality was mediocre to poor. For the same money you can do a lot better elsewhere I bet.
Quality well I covered that...
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Flow numbers are kind of a big deal
They are a good way to compare heads knowing that the AFRs are about the best out there and comparing flow to them. Other than that you are just going by how pretty they are
They are a good way to compare heads knowing that the AFRs are about the best out there and comparing flow to them. Other than that you are just going by how pretty they are
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Melting Slicks
Joined: Jun 2016
Posts: 2,979
Likes: 332
From: Woodinville WA
If you can get enough compression for what you want (the Felpro .015" shim gasket helps, if you deck is perfectly flat), the ATK 70cc/185cc heads should definitely be considered.
They definitely have the best best flow for the size for under $1,050.
https://www.high-performance-engines...p/sbc70185.htm
They're the Profiler (Cast in Ohio) heads, but they dropped the 64cc chamber version or sold out of them; this is a version with standard height exhaust ports so they fit most headers well. (They're the casting that Chad Speier is using in his S-Factor street lineup, but he CNCs them to at least 205cc.)
They only come with hyd roller springs, but you could swap them over to other springs yourself or give ATK a call and see if they'd send you a set with flat tappet appropriate springs (not that that's the best way to buy / spec valve springs...).
Adam
P.S. Boot: Good to see you on CF! (I usually see you post on ST and your YouTube videos, only.)
They definitely have the best best flow for the size for under $1,050.
https://www.high-performance-engines...p/sbc70185.htm
They're the Profiler (Cast in Ohio) heads, but they dropped the 64cc chamber version or sold out of them; this is a version with standard height exhaust ports so they fit most headers well. (They're the casting that Chad Speier is using in his S-Factor street lineup, but he CNCs them to at least 205cc.)
They only come with hyd roller springs, but you could swap them over to other springs yourself or give ATK a call and see if they'd send you a set with flat tappet appropriate springs (not that that's the best way to buy / spec valve springs...).
Adam
P.S. Boot: Good to see you on CF! (I usually see you post on ST and your YouTube videos, only.)
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
You should look harder I'm on several boards and have been for a Long time! Also I post A LOT more than just my vids, post/reply to subjects same as I always have before I made vids. Now I also make vid post when relevant, even vids that aren't mine.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Nobody gets it 100% right because there are too many different scenarios, that's why they call it experience. You developed what you need for your app
Engine masters have messed up more than a few times in their test, some are pretty good but see my first sentence.
Engine masters have messed up more than a few times in their test, some are pretty good but see my first sentence.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
ya i know..Ive watched your videos
Pro
Joined: Jun 2021
Posts: 505
Likes: 230
If you can get enough compression for what you want (the Felpro .015" shim gasket helps, if you deck is perfectly flat), the ATK 70cc/185cc heads should definitely be considered.
They definitely have the best best flow for the size for under $1,050.
https://www.high-performance-engines...p/sbc70185.htm
They're the Profiler (Cast in Ohio) heads, but they dropped the 64cc chamber version or sold out of them; this is a version with standard height exhaust ports so they fit most headers well. (They're the casting that Chad Speier is using in his S-Factor street lineup, but he CNCs them to at least 205cc.)
They only come with hyd roller springs, but you could swap them over to other springs yourself or give ATK a call and see if they'd send you a set with flat tappet appropriate springs (not that that's the best way to buy / spec valve springs...).
Adam
P.S. Boot: Good to see you on CF! (I usually see you post on ST and your YouTube videos, only.)
They definitely have the best best flow for the size for under $1,050.
https://www.high-performance-engines...p/sbc70185.htm
They're the Profiler (Cast in Ohio) heads, but they dropped the 64cc chamber version or sold out of them; this is a version with standard height exhaust ports so they fit most headers well. (They're the casting that Chad Speier is using in his S-Factor street lineup, but he CNCs them to at least 205cc.)
They only come with hyd roller springs, but you could swap them over to other springs yourself or give ATK a call and see if they'd send you a set with flat tappet appropriate springs (not that that's the best way to buy / spec valve springs...).
Adam
P.S. Boot: Good to see you on CF! (I usually see you post on ST and your YouTube videos, only.)
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
I don't care bout flow numbers myself But more so the shape
As in shape of the port. THAT would be flow would it not? If flow is not relevant.....then what is?
Obviously quality is, but on an apples to apples comparison flow is king.
Last edited by REELAV8R; Dec 13, 2022 at 07:51 AM.
Le Mans Master
Joined: May 2007
Posts: 5,031
Likes: 1,121
From: North tonawanda NY
Key is better flow throughout the whole lift range and not just better flow at say .600 at the cost of flow below that. This is where companies like AFR shine. better flow at lower lift number allows larger heads to work well even on smaller displacement engines.
they accomplish this through the port design
they accomplish this through the port design
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Drifting
Joined: Aug 2019
Posts: 1,510
Likes: 498
Maxx 183 SBC (Sold in Pairs) - PROMAXX Performance Products
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
Your statements are vague at best. What exactly are you referring to? Power as in HP? Power as in torque? Be specific. Where in the RPM range are we talking? We are still talking about HEAD flow correct? Are you inferring that if I can flow less air and fuel into the cylinder I can make more power?
Being coy is not productive.
Being coy is not productive.
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Your statements are vague at best. What exactly are you referring to? Power as in HP? Power as in torque? Be specific. Where in the RPM range are we talking? We are still talking about HEAD flow correct? Are you inferring that if I can flow less air and fuel into the cylinder I can make more power?
Being coy is not productive.
Being coy is not productive.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
Are your contributing or What is that? You tube arrogance?
If you want to contribute, that's great. If you want to pretend you're superior by throwing around vague comments that kind of hint...something? Well I'm sure there are folks who are impressed by that.
If you want to contribute, that's great. If you want to pretend you're superior by throwing around vague comments that kind of hint...something? Well I'm sure there are folks who are impressed by that.
Last edited by REELAV8R; Dec 13, 2022 at 01:28 PM.