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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Supercharger vs Turbo: Head Gaskets

  • Thread starter Thread starter 99FiveOh
  • Start date Start date Sep 8, 2011

99FiveOh

15 Year Member
May 20, 2006
2,051
20
99
J-Ville, FL
Sep 8, 2011
#1
  • Sep 8, 2011
  • #1
I am seriously considering putting a turbo on my car. The sound of a turbo spooling up is just pure sex! However, it seems like almost every turbo build I read ends up with blown head gaskets! Yet, I see so many supercharged combos live a long time with stock head gaskets.

When I had my S trim on my old 95 GT I thought I was going to blow a head gasket at any time! I was so convinced that I had a set of gaskets on standby waiting. Miraculously, never blew a head gasket! Even with 15 psi on 100* days while beating the snot out of it!! Of course it was tuned by who I consider to be one of the best, if not the best 94/95 tuners in the country.

So, why do turbos seem to blow head gaskets more than supercharged cars?
 

ProKiller

Founding Member
Apr 26, 2002
3,064
15
78
PA
Sep 8, 2011
#2
  • Sep 8, 2011
  • #2
i don't think that's necessarily true, i've popped my headgaskets three times now with my s-trim. If i had to guess though, turbos are a little more difficult to tune. that and it's all too easy to up the boost.
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
9,297
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Acworth, GA
Sep 9, 2011
#3
  • Sep 9, 2011
  • #3
I think it's because people get careless with the boost.

Kurt
 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"
15 Year Member
Nov 29, 1999
14,679
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154
Boca Raton, Florida
Sep 9, 2011
#4
  • Sep 9, 2011
  • #4
Turbo's seem to be really torquey all the way through the RPM's, seems to be more strain. I owned a 1986 Buick Grand National back in 1999 and even as heavy as it was the damn thing would throw you back in the seat. Also had a TE-44 Garrett blowing 21psi and 3" down pipe. I also blew headgaskets twice with my Vortech on the 94. That was because I got greedy with the boost 12psi pulley was making like 14.5psi. Main key with any type of power adder is getting it properly tuned. My Grand National made 500+HP on a conservative dyno tune.







 

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BK_CAULEY

it's built for speed not longevity, woman
Dec 26, 2006
0
10
49
Thomasville, ga
Sep 9, 2011
#5
  • Sep 9, 2011
  • #5
Probably because alot of people have ****ty lines running to there wastegates and they lose vacuum. seen that once or twice.
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
9,297
1,641
214
Acworth, GA
Sep 10, 2011
#6
  • Sep 10, 2011
  • #6
A lot of it has to do with tuning the fuel/rpm ratio. On a blower, the boost is consistent with RPM. With the turbo it varies a lot at different rpms, so it gives a different angle to the tunability.

Kurt
 

Black Stampede

Founding Member
Sep 3, 2002
1,811
2
39
Grand Rapids, MI
Sep 21, 2011
#7
  • Sep 21, 2011
  • #7
Because people are stupid. And some just unlucky.
 

FastDriver

I was uncomfortably high & wearing a helmet
SN Certified Technician
Sep 5, 2001
6,086
2,687
224
Vass, NC
Sep 21, 2011
#8
  • Sep 21, 2011
  • #8
buy the right gaskets (Felpro MLS or cometics)... you'll blow a piston before the gasket

Don't want to blow a piston? Pick the right boost lines, and tune the car to stay conservative with the A:F. Stay at 11.5:1 and keep timing conservative, too.

Good luck.

Chris
 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"
15 Year Member
Nov 29, 1999
14,679
424
154
Boca Raton, Florida
Sep 21, 2011
#9
  • Sep 21, 2011
  • #9
One more thing to add. Pressure gauge essential but Air / Fuel ratio gauge connected to the O2 sensors are always overlooked. If I had this on my 94 with the Vortech I probably would have never blown a HG.
 
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