Fox How much boost is safe to run. Stock engine

James V

Active Member
Feb 26, 2017
409
146
53
26
Connecticut
I have a 2.1 Kenne Bell just installed, up and running. With the stock pulley I'm making 11# and it's a blast to drive. With the underdrive I'm making 6#. My engine is completely stock so would 11# be safe if I'm not laying into it every 2 minutes?
 
  • Sponsors(?)


TOOLOW91

If you're the village idiot what's that make me?
15 Year Member
Nov 29, 1999
7,270
7,151
234
S.I.NY
Safe is a relative term . One guys safe isn’t another . Stock head gaskets ? Stock head bolts ? What’s the rest of the combo .
Your combo makes less with an underdrive because the smaller Crank pulley spins the blower slower.
You need to give the engine what it likes . Read the plugs for timing and fuel . Keep an eye on afr etc .

You’re asking about boost id love to know what the afr and timing is at ?

@a91what What ya think ?
 

James V

Active Member
Feb 26, 2017
409
146
53
26
Connecticut
Safe is a relative term . One guys safe isn’t another . Stock head gaskets ? Stock head bolts ? What’s the rest of the combo .
Your combo makes less with an underdrive because the smaller Crank pulley spins the blower slower.
You need to give the engine what it likes . Read the plugs for timing and fuel . Keep an eye on afr etc .

You’re asking about boost id love to know what the afr and timing is at ?

@a91what What ya think ?

The engine is all stock. Head gaskets stock. I have shorties and full exhaust only. My cousin set the timing, I'll have to ask exactly what he set it at. And I still need to get an afr gauge. I've only driven it around the block.
 

TOOLOW91

If you're the village idiot what's that make me?
15 Year Member
Nov 29, 1999
7,270
7,151
234
S.I.NY
The engine is all stock. Head gaskets stock. I have shorties and full exhaust only. My cousin set the timing, I'll have to ask exactly what he set it at. And I still need to get an afr gauge. I've only driven it around the block.
Set it at ? That’s one thing . It needs to be pulling timing in boost . If it keeps adding the engine will not last longer then a few more times around the block .

i wouldn’t push it much further then 11 psi with everything bone stock
 
Last edited:

James V

Active Member
Feb 26, 2017
409
146
53
26
Connecticut
Set it at ? That’s one thing . It needs to be pilling timing in boost . If it keeps adding the engine will not last longer then a few more times around the block .

i wouldn’t push it much further then 11 psi with everything bone stock
I'm still learning how everything works. How can I tell if its pilling timing?
 

90sickfox

I didn't really have an issue with the stink...
SN Certified Technician
Mar 2, 2015
5,163
4,255
203
42
What injectors are you running ? Is it chipped or stand alone ? What kind of fuel management do you have ?
 

revhead347

Just rub Vaseline all over
15 Year Member
Jun 14, 2004
8,375
1,198
214
40
Acworth, GA
The hard parts should be fine at 11lbs. The head gaskets may not hold up. Keep the timing conservative in the tune, and the head gaskets might be fine too. There are all kinds of variables that could cause the engine to fail prematurely, but standard case scenario, there is no reason it should fail because it's a stock engine. Keep in mind that Kenne-Bell designs that kit to be bolted onto a stock engine. The market is driven to accommodate the bolt on customer. The tune is the most important part.

Kurt
 
  • Like
Reactions: James V

TOOLOW91

If you're the village idiot what's that make me?
15 Year Member
Nov 29, 1999
7,270
7,151
234
S.I.NY
Don’t go on and keep getting on it with no tune or BTM to pull timing . Or without the fuel pump .
 
  • Like
Reactions: James V
Thread starter Similar threads Forum Replies Date
ExplodingGopher How much boost can i run safely? Fox 5.0 Mustang Tech 10
Cammandobrando 97 cobra cobra , rear end, how much power will it take ? 1996 - 2004 SN95 Mustang -General/Talk- 1
Kpblownfox Fox How Much Timing Under Boost? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
B Fox How Much Boost And Power For A Coyote Swap 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 9
D how much boost? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 5
spartanpride How much boost, stock block & internals? 1994 - 1995 Specific Tech 11
C 331 .030 over main support system how much boost??? 1994 - 1995 Specific Tech 3
Kdubslugga How much more boost will a 8" crank pulley give me? Fox 5.0 Mustang Tech 2
G how much boost saleen sc 2005 - 2009 Specific Tech 1
R How Much Boost? SN95 4.6L Mustang Tech 2
0 Those with NOVI 2200RR, how much boost? 2005 - 2009 Specific Tech 4
enyawix How much boost can the stock ignition handle? SN95 4.6L Mustang Tech 6
8 n/a 2.3 how much boost can it take 2.3L (N/A & Turbo) Tech 2
2 Procharger 3.35 pulley / how much boost ? 1994 - 1995 Specific Tech 2
T t88 boost how much for stock bottem Fox 5.0 Mustang Tech 2
2 How much BOOST with 3.5 Pulley? SN95 4.6L Mustang Tech 0
97yelstang how much boost SN95 4.6L Mustang Tech 8
97yelstang how much boost SVT Tech Forum 1
KENS89LX how much boost for a stock 5.0? Fox 5.0 Mustang Tech 12
geneos5546 roots or cetrifigual how much boost 2005 - 2009 Specific Tech 5
N 03 cobra .how much boost will i have? SVT Tech Forum 7
RsStanG1987 How much Boost Fox 5.0 Mustang Tech 8
300bhp/ton How much boost can a stock 5.0 handle? Fox 5.0 Mustang Tech 6
Hunter-White That much boost for not much $$$??? SN95 4.6L Mustang Tech 11
just4bob50 How much more boost before needing a retune Fox 5.0 Mustang Tech 5
ADRENLN anyone have an idea about how much boost is lost through heads/cams? SN95 4.6L Mustang Tech 10
Redsnake2 How much boost can I run? 1994 - 1995 Specific Tech 2
L How Much Boost With 9.6:1 Compression? Fox 5.0 Mustang Tech 1
W How Much Boost Will My Combo Make? 1994 - 1995 Specific Tech 12
L how much boost with out msd btm Fox 5.0 Mustang Tech 10
9 How much boost? SN95 4.6L Mustang Tech 11
milehighstang How much boost? 1994 - 1995 Specific Tech 9
LXSTASY How much boost can you run? Fox 5.0 Mustang Tech 45
D 20psi boost too much? 2.3L (N/A & Turbo) Tech 14
S how much boost on stock internals? 1994 - 1995 Specific Tech 17
E How much boost do you think? SN95 4.6L Mustang Tech 4
UnderPressureGT How much boost can a stock bottom end handle?? Fox 5.0 Mustang Tech 19
C how much boost will stock internals take? SVT Tech Forum 3
L How much boost on forged internals?! SN95 4.6L Mustang Tech 23
BlueOvalStangGT How much boost on stock block w/strim. 1994 - 1995 Specific Tech 13
J How much boost can be run.... SN95 4.6L Mustang Tech 8
M how much boost on stock bottom end? Fox 5.0 Mustang Tech 9
S How much boost? 2.3L (N/A & Turbo) Tech 1
S How much possible boost on KB for 96-98 cobras? SVT Tech Forum 6
orangestang2000 How much boost can a stock intake withstand? SN95 4.6L Mustang Tech 13
red ink How much BOOST will a stock 5.0 take from a Kenne bell Fox 5.0 Mustang Tech 0
torqueIT How much boost can the new V-8 handle (theoretically)??? 2005 - 2009 Specific Tech 26
R How much boost can I run on a stock 98 cobra SN95 4.6L Mustang Tech 4
C how much boost? Fox 5.0 Mustang Tech 3
9 how much boost Fox 5.0 Mustang Tech 7
Similar threads