Ok so i did search, but i didnt find the answer im looking for. After i rebuild my rear, i will be in the market for a cam swap. I am going to s/c my car eventually but it may take awhile. For the time being based on experience how well do blower cams do with a N/A motor. It will get tuned, and have the rest of the bolt ons of course. Will they still make good power?? Im looking at VT stg2 blower cams for your information. Thanks in advance.
blower cams on n/a
- Thread starter 02TruBlueGt
- Start date
They might be out of stock of the st2 blower cams? I remember them saying their site sometimes takes the product offline when they are not in stock. I have the St2 blower cams but not NA.
blower grinds do not have any "Scavenging" overlap like n/a grinds do, they are designed in mind to keep the valves open longer to allow more air into the cylinder, whereas n/a grinds overlap so that the engine sucks in more air via a process called "Scavenging" where the escaping exhaust gases help pull in more air.
i dont think you will gain much if anything going from stock to blower grinds without a blower, but as soon as you do get the blower, itll make it that much better.
i dont think you will gain much if anything going from stock to blower grinds without a blower, but as soon as you do get the blower, itll make it that much better.
This must be the case, 'cause I checked on Monday, and they weren't showing the stage II's.
What's the better of the two for a street/sometimes strip car with an 8 psi Vortech? I see the different lift and duration profiles.
This is the situation I'm in.
Oh well, maybe I'll throw my aluminum 3V block in at the same time.
Ok,
I am wondering, have you checked out aftermarket cams for a 4.6 from more than just VT? Just curious...
I really don't like how companies classify their cams... The Comp line of Cams especially the Comp 270 PI cam work well both N/A and in a SC application. Crower Stage 2 SC PI cam is almost identical in specs compared to the Comp 270 except the Crower cam has more lift.
I am using the Crower Stg 2 SC PI cam in my N/A application and I have no intentions of ever adding a SC. According to your post, it wouldn't make any more power than if it had stock cams, well...
My car with the plastic PI intake, auto transmission and IRS is making more power( about 20 RWHP ) than a car with similar engine specs( 5.0L Big-Bore ) as mine that has VT Stg 2 N/A cams, higher compression ratio and the Fox lake P51 intake and is in a 5 Spd manual mustang. The advantages in parts that my car has, is the bigger Crower Cams and better heads, everything else the mustang has the advantage...
In short, most 4.6 S/C cams will work in a N/A application and work quite well doing so...
04YELLOWGT
Active Member
Ive got the stage 2 blower cams going in my car. I talked to VT a before I had my blower about putting them in and they said they will still work great for a NA car.
I went with the VT 2's on suggestion from VT, i won't be going over 10psi and didn't want anything too aggressive and was told they would work perfectly on the street.
yes, i also have stage 1 custom blower cams in my car for almost 2 years now....blower comming end of summer.
anyway, they perform good. i did get them in ported heads but i picked dyno tested 35 rwhp from the combo of heads and blower cams. something has to be producing that power. most likely a little from both.
anyway, they perform good. i did get them in ported heads but i picked dyno tested 35 rwhp from the combo of heads and blower cams. something has to be producing that power. most likely a little from both.
hotmustang331
Active Member
Well oddly enough those comp 270 cams have just as much ACTUAL valve overlap as the VT stg 2 cams....I got the specs from Scott and ofcourse the specs from comp, and if I recal correctly, the 270s had 15*s of valve overlap.
So for LOW boost the 270s would be ok....but start cranking it up and you will probably start loosing some of it straight out of the exhaust, or so im told.
The VT stg 1 cams for refrence have only 5*s of valve overlap.
SaleenGT2001
Well-Known Member
if you are really wanting some badass blower cams get the MPH custom grind ones. i just bought a set after reading how much power they made. heres what one of the guys at MPH said about them
thats 93 rwhp from just cams
and a set is on the way to my house right now
thats 93 rwhp from just cams
and a set is on the way to my house right now
hotmustang331
Active Member
^I think thats only half the story. I recal that thread, and I believe he went to a forged motor and upped the boost to 15PSI, and the combined went to 56X.
It wasnt JUST the cams if I recall correctly...but somone correct me if im wrong.
It wasnt JUST the cams if I recall correctly...but somone correct me if im wrong.
LaserRed01GT
Banned
Totally untrue. All camshafts provide a certain amount of valve overlap in order to help evacuate the cylinder, they have to.
Blower cams tend to have a little less lift and duration on the intake, and a slightly larger exhaust duration and lift split as compared to a similar N/A cam.
For example the Comp XE 270 AH cam - 234/238 @ .050", .550"/.550", 113 LSA has a total valve overlap of approximately 44°.
The VT Stage 2 blower cam - 220/230 @.050", .530/.570", 112+4 LSA has a total valve overlap of approximately 27°.
The VT Stage 1 N/A cam - 224/226 @.050", .540/.550", 110 LSA has a total valve overlap of approximately 39°
No such thing as a camshaft with only 5° overlap unless it's in a lawnmower
, hotmustang331 knows better .Similar threads
