eariler this week i had the chance to dyno test an Edelbrock STR-14 intake.
the motor is out of a customers race car, and is here for freshening, and hopefully an increase in power.
since i had never had the chance to run one of these intakes before, i wanted to test it before pulling the motor apart, and to baseline the motor overall as it came out of the car(to try and help determine if the car was running like it should for what the motor is making for power).
the basic build is:
446(unknown CR, but it has just over 190psi on a comp. test)
stage III ported E heads by Compu-Flow
Herbert roller cam, 246/253 @ .050, .585/.600 lift, 107lsa
HS 1.5 rockers
Indy reverse flow cooling
1 7/8" X 3" headers with 18" extensions
i tested 3 different intakes on this motor.
my Holley SD-4500 intake with a mildly reworked non-HP 9375 carb, a Weiand TR with 2 Carter 750 AFB's, the TR with the Ebrock 600's that the owner was running on the STR-14, and the STR-14 with the Ebrock 600's.
i made several warm up pulls for each combination, and made sure the numbers would repeat within 1-2hp, which they did for all the combinations.
here are the numbers:
RPM-----SD/1050---TR/750----TR/600---STR/600
---------TQ/HP-----TQ/HP-----TQ/HP-----TQ/HP
3700----522/368---555/391---558/393---528/372
3800----536/389---566/410---567/410---536/388
3900----548/407---566/420---572/425---548/407
4000----552/421---569/433---572/436---546/416
4100----554/432---572/446---570/445---545/426
4200----555/444---569/455---565/452---547/438
4300----557/456---565/463---564/462---547/448
4400----559/468---564/472---570/477---548/459
4500----561/481---569/487---566/485---550/471
4600----560/491---571/500---568/498---543/476
4700----556/498---569/509---568/509---540/483
4800----549/502---567/518---567/518---537/491
4900----548/512---564/526---562/525---530/494
5000----544/518---558/531---557/530---531/505
5100----542/526---554/538---546/530---525/510
5200----535/530---542/537---544/539---518/513
5300----534/538---535/540---542/547---513/517
5400----526/541---527/542---530/545---504/518
5500----519/544---525/550---526/551---496/519
5600----517/552---513/547---511/544---490/523
5700----513/556---504/547---505/548---479/520
5800----502/554---491/542---489/540---468/517
5900----494/555---479/538---483/542---466/523
6000----485/554---466/532---471/538---459/525
6100----474/551---463/538---462/536---452/525
6200----464/548---454/536---456/538---446/527
6300----456/547---448/538---449/538---429/515
6400----443/540---442/538---436/532---421/513
6500----437/541---428/530---432/534---405/501
as mentioned in another thread, this particular STR-14 has a home made top piece, which is seperated from the base by a 3/4" piece of some sort of plastic.
the carbs are mounted sideways, like an OE MW motor, with the primary barrels towards the outside of the intake.
i'll take a couple of pics of it next time i'm down at the shop.
the motor came out of a 63 B body that weighs 36-3700lbs, was running a 10" Trans-King converter which flashed about 4000, and 4.56 gears, and he was using 1 7/8 headers but was not running the reverse flow cooling system in that car.
the car was a low-11 sec combo(typically teens-20's), and never broke into the 10's.
