got a super ram, on your vette but want more?

[grumpyvette]

aftermarket intakes have a good deal of potential, but you need to maximize the engines air flow potential, and match components in your engine combo to the intended use, power range and rpm band.
you can,t do that with an intake swap alone.
The heads must flow the same as the intake and the cam lift and duration must allow the ports to flow at their full potential,that requires about a 235-240 duration and lift close to .580, or more, a cam with that duration will require a 9.7:1-10:1 cpr to maintain good mid rpm torque and yet not get into detonation issues
the THREE most popular high flow intakes are currently, the TPIS MINIRAM,(basically a LT4 CLONE) the ACCEL SUPER RAM,(BASICALLY AN IMPROVED TPI with larger PLENUM) and the HOLLEY STEALTH RAM (BASICALLY AN EFI TUNNELRAM /THROTTLE BODY CONVERSION)
(WHICH IN STOCK FORM WON,T CLEAR THE CORVETTE HOOD)
the key is matching the flow rates and rpm range of all components to maximize each component in the same intended power band,its hardly a mystery at this point in the game, so heres a closely matched list.
youve got to maximize all the rest of the combo to match the intakes intended rpm and power band.
since you've already got the super-ram,stick with it, its basically designed to work in the 3500rpm-6500rom band so thats where you gear the car and concentrate matching components.
the other two intakes have slightly higher power bands
but get the intake you've selected extrude honed,

read these threads and linked info

http://gofastnews.com/board/technical-a ... nteed.html

viewtopic.php?f=52&t=796

viewtopic.php?f=55&t=1231

get the best heads you can find ,
like brodix IK 210cc heads,
http://www.brodix.com/heads/ik.html
or
AFR 210cc heads,
http://www.airflowresearch.com/index.php?cPath=24_33

viewtopic.php?f=52&t=181
viewtopic.php?f=52&t=90
viewtopic.php?f=52&t=322
get the heads mildly ported,
if they don,t flow at least 276cfm at .600 lift
and match them to a 9.7:1-10:1 cpr 383-406 sbc short block
http://ohiocrank.com/chev_sb_shortb.html

with a crower #00471 hydraulic roller cam, or almost any very similar duration and lift cam in the 235-240 duration and 550-595 lift range hydraulic roller cam on a 110-112 LSA

http://www.crower.com/misc/cam_spec/cam ... 1&x=23&y=5

and a low restriction 3" exhaust, and full length headers

http://www.melroseheaders.com/products/ ... ms/c-4.php

install 3.73:1 rear gears and a 3000rpm stall converter

viewtopic.php?f=71&t=1715&p=4657&hilit=+converter#p4657

add 1.6:1 roller rockers

viewtopic.php?f=52&t=1719&p=4268&hilit=+rockers#p4268

get a decent baffled 8 qt oil pan installed

viewtopic.php?f=54&t=2187&hilit=baffled

viewtopic.php?f=54&t=150

viewtopic.php?f=54&t=1224

http://www.eecis.udel.edu/~davis/z28/wi ... 10413.html

 

[grumpyvette]

superram

TPI

tpi aftermarket runners

http://www.jegs.com/webapp/wcs/stores/servlet/topcategory_10001_10002_-1

https://www.ebay.com/itm/Weiand-908...For-Use-With-144-174-Blower-Kits/400669303867


https://www.ebay.com/itm/Weiand-622...r-Small-Block-and-Big-Block-Chev/112273744933

Have one to sell? Sell now
Weiand 6221 Offset Thermostat Housing Adapter For Small Block and Big Block Chev
your problem is VERY COMMON, if the throttle body and thermostat housing has a clearance issue on some modified EFI intakes, heres the usual cure
chevy ram jet intake

mini ram

holley single plane intake

when you look at the choices the upgrade to the HOLLEY STEALTH RAM GIVES YOU THE MOST FOR YOUR MONEY
compare the airflow numbers

CROSSFIRE INTAKE
190cfm per port runner (measured individually)

TPI Runners (measured individually)
Stock....................203.17 cfm
ACCEL................242.02 cfm
Extrude/ACCEL...275.83 cfm
Super Ram (ported)............289.18 cfm
Intake manifold with 3/8 inch radiused intlet
.............................222.45 cfm
Stock intake manifold with runner
Stock....................198.72 cfm
ACCEL................213.52 cfm
Extrude/ACCEL....217.11 cfm
Super Ram............220.67 cfm

ACCEL Hi-Flow intake manifold with 3/8 inch
radiused inlet.........251.51 cfm

ACCEL Hi-Flow intake manifold with runner
Stock....................215.83 cfm
ACCEL................232.53 cfm
Extrude/ACCEL....243.21 cfm
Super Ram............240.24 cfm

Extrude-Honed ACCEL Hi-Flow intake
manifold with 3/8 inch radiused inlet
............................275.83 cfm

Extrude-Honed ACCEL Hi-Flow intake
manifold with ACCEL runner
............................266.94 cfm

Edelbrock Performer RPM manifold
(Stock)..................286.51 cfm

Edelbrock Victor Jr.
.............................275.24 cfm


Runners (measured individually)
HOLLEY STEALTH RAM Stock with mild port work ....................275 cfm
HOLLEY STEALTH RAM ported more extensively..................298 cfm


THE HOLLEY STEALTH RAM EFI INTAKE SYSTEM POTENTIALLY MAKES MORE TQ OVER A WIDER RPM RANGE AND SIMILAR or HIGHER PEAK HP THAN THE BEST OF THE OTHER CHOICES AVAILABLE
AND WITH THE CUSTOM PLENUM IT FITS CORVETTES

 

[grumpyvette]

you might want to read thru this, the short version, is the hood clears enough to close the hood but the hood on a c4 corvette contacts the intake, when the engine moves and it produces about 15 more hp than the super ram peak numbers but moved the torque curve 500rpm higher and lost 13 ft lbs of torque at lower rpms

http://www.vetteweb.com/tech/vemp_1010_ ... index.html

http://garage.grumpysperformance.co...ther-efi-intake-manifold-info.431/#post-48733

http://garage.grumpysperformance.com/index.php?threads/throttle-body-size-52mm-vs-58mm.641/#post-859

http://garage.grumpysperformance.co...m-on-your-vette-but-want-more.2614/#post-7114

obviously theres other options

 

[79Rod]

grumpy will the Pro flo xt intake fit on my 90 L98. I was reading edelbrock web page, they says that will fit on 1986 heads and earlier.
I readed the vetteweb article, but the heads they use aren't stock heads.
can you help me bro?

 

[grumpyvette]

the newer head bolt pattern is not an exact match, to some of the intakes but it is to others youll need to order the correct intake

http://www.vetteweb.com/tech/vemp_1010_ ... index.html

http://www.edelbrock.com/automotive_new ... hevy.shtml

why not talk to edelbrocks tech guys
Edelbrock, LLC Headquarters
2700 California Street, Torrance, CA 90503

Phone: 310-781-2222
Fax: 310-320-1187
Tech Line Only: 800-416-8628

Hours: Monday-Friday 8:00 am-12:30, 1:30-5:00 pm PST, weekdays

Tech Line Hours: Monday-Friday 7:00 am to 5:00 pm PST, weekdays

1986 & Earlier Small-Block Chevrolet Up To 450 HP (29 lb/hr injectors) #3527* #35271* #35273*
1986 & Earlier Small-Block Chevrolet Up To 650 HP (44 lb/hr injectors) #3537* N/A #35373*
Small-Block Chevrolet With Vortech Or E-Tec Heads Up To 450 HP (29 lb/hr injectors) #3528* N/A #35283*
Small-Block Chevrolet With Vortech Or E-Tec Heads Up To 650 HP (44 lb/hr injectors) #3538* N/A #35383*


Installation Notes for #3527: Recommended intake gasket: Edelbrock #7201 for (#3527) and gasket #7325 for (#3528). Manifold ht: A-9.09" B-8.20" see A/B Measurements.

CHEVROLET 262-400 V8 PRO-FLO XT MANIFOLDS
Application As-Cast Polished Black
Pro-Flo XT Manifold for 1986 & Earlier S/B Chevy (Natural Aluminum Finish) #7137* N/A #71373*
Pro-Flo XT Manifold for Vortec or E-tec Heads (Natural Aluminum Finish) #7138* N/A #71383*
Fuel Rail Kit for S/B Chevy (Compatible with Standard or Pico injectors)