Will L 98 ,58cc, 160-165,cc port alum heads (14101128)help performance on a 290hp small block thank you pete.
you may find info in links you can use else-ware in many threads
Bbc Related & Links And Useful Info
a few useful links, and sub links videos, and tips to look over yeah, increased displacement helps and building a killer BBC old school, for your car can be both cost effective and produce impressive results some of the most effective, cost per hp and efficient combo's , will be the 496...
garage.grumpysperformance.com
as compared to WHAT!
L98 heads offer some improvement over SOME other O.E.M SBC heads
L98 heads are a slight upgrade over the stock crate engine heads ,
but certainly not a major improvement compared to other available options,
like in most cases it mostly depends on what other components are used or matched too the heads, cam, headers etc, and there are certainly much better choices!
yes we are almost ALL on limited budgets but careful research helps maximize your power per dollar spent and heads are a huge factor limiting or allowing the engines potential power.
but compared to most current aftermarket heads , and even mildly reworked vortec heads L98 heads are rather pitiful. I certainly could find a better head design without looking very hard.
Think things through carefully and spend money wisely, do your research
heres a typical 290 hp crate engine
http://www.chevrolet.com/performance/crate-engines/small-block-350-290-hp.html
RESEARCH CAN SAVE YOU HUNDREDS OF DOLLARS AND WEEKS OF WASTED TIME
http://garage.grumpysperformance.co...-the-rabbit-hole-with-alice.10933/#post-66925
http://garage.grumpysperformance.com/index.php?threads/first-hotrod-build.12902/#post-67005
THERES LOTS OF BETTER CHOICES IN CYLINDER HEADS
youll want to take the time to do the math and compare components, lets for a second assume your,debating these two heads,
if you compare the 195cc vs 210cc AFR heads, all the way
theres a significant improvement in flow and a negligible decrease in port flow speed
theres always a compromise made between cost and potential power,
and obviously you want to match components to the intended power and rpm range,
but having seen a bunch of 383 builds use both AFR heads,
I think the 210cc choice here, is a no brainer if you can afford the price.
heres a chart FROM THE BOOK,HOW TO BUILD BIG-INCH CHEVY SMALL BLOCKS with some common cross sectional port sizes
(measured at the smallest part of the ports)
...........................sq inches........port cc
edelbrock performer rpm ....1.43.............170
vortec......................1.66.............170
tfs195......................1.93.............195
afr 180.....................1.93.............180
afr 195.....................1.98.............195
afr 210.....................2.05.............210
dart pro 200................2.06.............200
dart pro 215................2.14.............215
brodix track 1 .............2.30.............221
dart pro 1 230..............2.40.............230
edelbrock 23 high port .....2.53.............238
edelbrock 18 deg............2.71.............266
tfs 18 deg..................2.80.............250
Potential HP based on Airflow (Hot Rod, Jun '99, p74):
Airflow at 28" of water x 0.257 x number of cylinders = potential HP
or required airflow based on HP:
HP / 0.257 / cylinders = required airflow
if we compare the head air flow rates between a 195cc and 210cc head on a 383-406 SBC and assuming a decent roller cam with the lift and duration,required, and intake that allows the heads to flow at their full potential,
195cc Street Head Flow Chart
.200 .300 .400 .500 .550
Int 146 201 247 275 280
Exh 119 166 197 213 218
210cc Race Ready Head Flow Chart
.200 .300 .400 .500 .550 .600 .650
Int 145 199 255 292 301 309 311
Exh 110 158 192 210 214 220 222
if you compare peak intake rated flow at .550 lift
280 cfm vs 301 cfm (about a 9% increase) youll see why
thats in theory potentially a 43 hp gain
http://garage.grumpysperformance.co...-corvette-l98-heads-any-good.5521/#post-23459
http://garage.grumpysperformance.com/index.php?threads/sellecting-cylinder-heads.796/#post-49711
http://garage.grumpysperformance.co...d-to-head-test-stock-vs-dart.5364/#post-16066
http://garage.grumpysperformance.com/index.php?threads/sources-for-cylinder-head-flow-numbers.240/
http://garage.grumpysperformance.com/index.php?threads/matching-parts-and-a-logical-plan.7722/
http://garage.grumpysperformance.com/index.php?threads/what-to-look-for-in-a-good-engine-combo.9930/
http://garage.grumpysperformance.com/index.php?threads/380-cu-sbc-in-vortec-head-build.12080/
http://garage.grumpysperformance.co...ghts-on-302sbc-vs-383-sbc-dyno-results.10210/
http://garage.grumpysperformance.com/index.php?threads/383-information-overload.11137/
http://garage.grumpysperformance.co...gine-to-match-the-cam-specs.11764/#post-55651
http://garage.grumpysperformance.com/index.php?threads/carb-intake-test.58/
YOU MIGHT FIND A BIT OF READING ,INFORMATIVE AND HELPFUL,
HERE IN THIS ENGINE BUILD LINKED BELOW, INFO THAT MAY HELP
notice they start with a similar crate engine and progressively build to higher power in stages and heads are a key component
http://www.corvettefaq.com/c3/goodwrench/GM Goodwrench 350 test part 1.htm
http://www.corvettefaq.com/c3/goodwrench/gm3502.htm
http://www.corvettefaq.com/c3/goodwrench/gm3503.htm
http://www.corvettefaq.com/c3/goodwrench/gm3504.htm
http://www.corvettefaq.com/c3/goodwrench/gm3505.htm
http://www.corvettefaq.com/c3/goodwrench/gm3506.htm
http://www.corvettefaq.com/c3/goodwrench/gm3507.htm
http://www.corvettefaq.com/c3/goodwrench/gm3508.htm
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