street car which intake...holley systemax...trickflow track heat..or my gt40 ported?

K

Killer5.0

Well-Known Member
#1
#1
can possibly get a good deal on the holley with 24lb injectors...only used for like 1kmi...would that be better and deliver more power or the track heat?

i currently have a gt40 upper lower i was going to have ported by tmoss but was told wouldn't give as much peak hp...again this is a street car so i dont redline shift all the time...usually i am very mild on it around 4500-5200rpm shift points. thanks

will be in combo with

pro-m 80mm
24lbers
afm 3.5" powerpipe
trickflow 170s
custom cam
3:73s

car is a 93 5spd gt
 
Chevy_Guy

Chevy_Guy

Well-Known Member
#2
#2
Intakes don't make horsepower. They alow air and fuel to the motor so it can make the power. With that said, either the holley or the TFS will be more than enough intake to do what ever you want. Unless you are knowledgeable on how one kind of intake will flow with one kind of head, with one kind of cam, with one kind of exhaust, you will be better off sticking with a complete HCI kit as others have stated in other threads.
 
K

Killer5.0

Well-Known Member
#3
#3
the thing is im trying to do it on the lower price point if possible...the hci kits are $2500 and up usually...if i can piece together just as good a kit if not better for less thats what im hoping for...hoping you guys would say if it would work with what i have listed...i can always change heads...im just looking for the best low-mid end street power since that where most of my driving occurs...i never cruise over 80mph
 
cobra20sc

cobra20sc

Well-Known Member
#4
#4
intakes make HP in that they effect the volumetric efficiency of the engine just like head design and cam selection. put another way, intakes effect the volumetric efficiency of the motor, how much volume of air relative to the actual displacement (which is volume) of the motor that it can pull in with each intake stroke. and so for a given density of air, more volume equals more mass flow equals more power.

the holley systemax and the edelbrock fuel injection intake manifolds are all about the same and are superior in design than the old GT40's making similar torque while eclipsing in top end HP (at least from the comparison tests we see in the magazines). theoretically though, the GT40 has a longer intake runner which is tuned to promote low speed efficiency and therefore torque . . . but again, i don't think its showing up very well in the comparos.
 
K

Killer5.0

Well-Known Member
#5
#5
that being said for what i want to do should i stick with what i have and have it ported to the 170s or go with the holley?...another thing is the holley has a 75mm tb opening and the gt40 has a 70mm (which is what i have..bbk..but i want to go with an accufab 75mm) but i think i can have the gt40 opened to 75mm to accomodate right?

sorry im still new to this and i appreciate the help of someone who is very knowledgable about this car/motor...
 
dsblk93gt

dsblk93gt

5.0 Moderator
#8
#8
Holley intake, I had one on my 331 and it worked great even NA with 8.5:1 compression when the Procharger was dead! I made a quick tune with the PMS and ran the car with 42lbers NA and it still ran hard.

I had TFS heads ported by Fox Lake with just a TFS Stage 1 cam, 13lbs with the Vortech...no idea on HP never dynoed it.

Get the Systemax, TFS heads, and a custom cam and don't look back!!! :)
 
K

Killer5.0

Well-Known Member
#10
#10
what would a good price be...its a holley systemax upper/lower with 24lb venom injectors...stock 95 gt fuel rails and a kirban vacuum assisted fp regulator?...guy said it has about 1000 miles on everything but the fuel rails?

and if i get it should i send it to tmoss for port work?
 
Nice86GT

Nice86GT

Member
#11
#11
The Holley is a great intake probably better than the TFS for a street car,
below 6000 rpm.If you have a ported GT40 already I would try changing
the upper and replace it with the composite style Comp Cams unit that
was originally made and marketed by Cartech.Although no longer available
I did run a ported GT40 Lower(Fox Lake) and a Bennett Racing bread box upper
(Very Similar to the Cartech) on a NA302 with ported J302 and a solid roller cam,
it went 10.90's @121mph.The cam was designed to work from 3200-6800
but it would pull to 8200rpm.I know that this is not near your combo but all
I'm saying is don't sell the GT40 short,desite its age its still a great manifold!
 
K

Killer5.0

Well-Known Member
#12
#12
well i havent gotten the gt40 ported yet...i think im going to go that route...than i can always swap it for a holley etc later on. thanks again
 
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