4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Im turboing my 97 Cobra Need some advice!

Thread Tools
 
Search this Thread
 
Old 01-08-2009, 09:56 PM
  #21  
from4to8
Thread Starter
 
from4to8's Avatar
 
Join Date: Nov 2008
Location: New Hampshire
Posts: 22
Default

Originally Posted by Frostbitten
A built shortblock for $1200???? Are you sure about that?
Built... meaning Manley Forged Rods and Pistons, comes with ARP rod bolts and bearings. I can put the motor together myself ---->ASE tech The crank is Fored from the factory as YOU should know. O and I said built motor correct? Not Built Short block built by someone else!
from4to8 is offline  
Old 01-08-2009, 11:48 PM
  #22  
boostanggt
1st Gear Member
 
boostanggt's Avatar
 
Join Date: Jan 2007
Location:
Posts: 144
Default

Originally Posted by amoosenamedhank
That's a big negative batman. What sounds easy to you.... boost comes in mildly and progressively increases or full boost slams in all at once?
This is why I think you should have to pass a test before you are aloud to post on here. There is no restriction to the motor whatsoever with a turbo besides a tiny bit of back pressure. A roots style supercharger builds boost instantly. Piston speed goes from cruising to red line ridiculously fast. Whereas a turbo will gradually build boost and progressively increase piston speed. It's a wasted energy turned into power. Why do you think superchargers make less power lb. for lb. Also go turn a supercharger and then a turbo, whether journal or bb, then make your call.
boostanggt is offline  
Old 01-09-2009, 08:44 AM
  #23  
amoosenamedhank
5th Gear Member
 
amoosenamedhank's Avatar
 
Join Date: Nov 2005
Location: MN
Posts: 4,412
Default

Originally Posted by boostanggt
This is why I think you should have to pass a test before you are aloud to post on here. There is no restriction to the motor whatsoever with a turbo besides a tiny bit of back pressure. A roots style supercharger builds boost instantly. Piston speed goes from cruising to red line ridiculously fast. Whereas a turbo will gradually build boost and progressively increase piston speed. It's a wasted energy turned into power. Why do you think superchargers make less power lb. for lb. Also go turn a supercharger and then a turbo, whether journal or bb, then make your call.
I guess I'm not sure why you would assume I'm referring to a roots style supercharger, how many of us are buying aftermarket roots style supercharger systems? Beyond that, you took the most extreme setup simply to embellish your point.

Centrifugal superchargers are very fixed, they work off of a very linear power curve and build boost progressively.

Of course a turbo is more efficient but I don't recall that being the argument. In my experience I've seen many more, well tuned, turbo cars take out engines then there supercharged counterparts. At least a 3:1 ratio.
amoosenamedhank is offline  
Old 01-09-2009, 04:51 PM
  #24  
livefast1
5th Gear Member
 
livefast1's Avatar
 
Join Date: Jul 2007
Location:
Posts: 2,363
Default

il bet you see more turbo cars break because its easier to get greedy and increase the boost in comparison to a blower car where its not just a turn of a ****.

to the op i hit about 8 lbs around 3800 rpm start building boost at 2800 (h1e turbine a/r is a little big). im expecting over 380 horses but havent had it dynod nor at the track yet.
livefast1 is offline  
Old 01-09-2009, 04:52 PM
  #25  
livefast1
5th Gear Member
 
livefast1's Avatar
 
Join Date: Jul 2007
Location:
Posts: 2,363
Default

if i were you i would look into a masterpower t70 or t76 with a .68 housing.
livefast1 is offline  
Old 01-09-2009, 06:37 PM
  #26  
from4to8
Thread Starter
 
from4to8's Avatar
 
Join Date: Nov 2008
Location: New Hampshire
Posts: 22
Default

Originally Posted by livefast1
if i were you i would look into a masterpower t70 or t76 with a .68 housing.
Yea I heard those t70 (61mm or 66mm) spool really fast! The hx40 is not a bad choice either. VERY reliable! How long have you been boosting? Im sure evan 6 psi would be fun! Anyway to get a speedo shot of your car? Thanks LIVEFAST!
from4to8 is offline  
Old 01-09-2009, 06:42 PM
  #27  
livefast1
5th Gear Member
 
livefast1's Avatar
 
Join Date: Jul 2007
Location:
Posts: 2,363
Default

yea the hx40 is just the predecessor of the h1e i have now and for 176 bux i CANNOT COMPLAIN, and im kinda just waitin on the track to open although i have ran her pretty hard hopin to trap over 112. havent driven it much since i got a negligent driving ticket and a burnout ticket but i just found out the cop LIED to me and told me negligent was 3 points but its actually only 1 (drivers improvement told me, internet told me, and a few cop buddies) so il stop being so discouraged and drive it more. o and i just did the build over the spring and managed to blow the clutch out already so im guessing its making pretty good power (put a spec 3 in it).
livefast1 is offline  
Old 01-09-2009, 07:36 PM
  #28  
Shaunmac9128
6th Gear Member
 
Shaunmac9128's Avatar
 
Join Date: Nov 2008
Location: RI
Posts: 5,453
Default

Sounds like alot more arguing than helping lol...probably going to get my ***** busted for posting in a V8 forum though haha
Shaunmac9128 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MustangForums Editor
Mustang News, Concepts, Rumors & Discussion
3
11-10-2015 11:39 AM
Luke9222
4.6L General Discussion
19
10-22-2015 11:55 PM
TCStangerv6
Street/Strip
12
10-11-2015 05:57 PM
88 orangepeel notch
Street/Strip
4
10-05-2015 09:03 AM
uedlose
The Racers Bench
4
10-01-2015 08:31 PM



Quick Reply: Im turboing my 97 Cobra Need some advice!



All times are GMT -5. The time now is 06:51 AM.