 how many lbs of boost |
 Jul 29, 2007 - 9:54 PM
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Enthusiast  Joined Dec 24, '06 From jonesville Currently Offline Reputation: 4 (100%)  |
how many lbs of boost can a stock 5s head handle....im not worried abt. the internals just the actual head.
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Aug 1, 2007 - 10:10 PM
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 Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
QUOTE(Kerr1 @ Aug 1, 2007 - 8:13 PM) [snapback]584481[/snapback] wat do i need for 15 safely? maybe thats a better way of putting it. on what turbo? 15psi on a ct26 like i have, and 15psi on the holset that itchy has are two very different things. the problem with running high boost on a 5sfe is not with the strength of the pistons or the head. its with the fact that its a high compression motor. the higher the compression, the more chance you have to run into detonation when trying to turn up the boost on pump gas. detonation is what ends up killing pistons, rods, headgasket, etc... -------------------- 15PSI - 30MPG - Megasquirt Tuned
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Aug 2, 2007 - 5:20 AM
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Enthusiast Joined Mar 17, '05 From Northridge, CA Currently Offline Reputation: 0 (0%) |
QUOTE(lagos @ Aug 1, 2007 - 10:10 PM) [snapback]584526[/snapback] QUOTE(Kerr1 @ Aug 1, 2007 - 8:13 PM) [snapback]584481[/snapback] wat do i need for 15 safely? maybe thats a better way of putting it. on what turbo? 15psi on a ct26 like i have, and 15psi on the holset that itchy has are two very different things. the problem with running high boost on a 5sfe is not with the strength of the pistons or the head. its with the fact that its a high compression motor. the higher the compression, the more chance you have to run into detonation when trying to turn up the boost on pump gas. detonation is what ends up killing pistons, rods, headgasket, etc... Would water/alcohol injection resolve this? I've been reading up on the devil's own kit and am seriously considering it being that I already run 15 degrees timing and I'd like to run more but I get pinging from 91 octane, but If I went with DO's W/A I. the effective octane would be 110+.... |
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Aug 2, 2007 - 10:53 AM
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Enthusiast Joined Oct 18, '06 From cincinnati Currently Offline Reputation: 10 (100%) |
QUOTE(king_wsk @ Aug 2, 2007 - 5:20 AM) [snapback]584599[/snapback] QUOTE(lagos @ Aug 1, 2007 - 10:10 PM) [snapback]584526[/snapback] QUOTE(Kerr1 @ Aug 1, 2007 - 8:13 PM) [snapback]584481[/snapback] wat do i need for 15 safely? maybe thats a better way of putting it. on what turbo? 15psi on a ct26 like i have, and 15psi on the holset that itchy has are two very different things. the problem with running high boost on a 5sfe is not with the strength of the pistons or the head. its with the fact that its a high compression motor. the higher the compression, the more chance you have to run into detonation when trying to turn up the boost on pump gas. detonation is what ends up killing pistons, rods, headgasket, etc... Would water/alcohol injection resolve this? I've been reading up on the devil's own kit and am seriously considering it being that I already run 15 degrees timing and I'd like to run more but I get pinging from 91 octane, but If I went with DO's W/A I. the effective octane would be 110+.... 91 octane? y don't you run 93? -------------------- proud =3sgte SWAPPED= '95 Celica ST owner [calling it the GT2 or half-trac]
309,000 miles n' .... |
Posts in this topic
Kerr1 how many lbs of boost Jul 29, 2007 - 9:54 PM
lagos c. this question is impossible to answer Jul 29, 2007 - 10:40 PM Gary 200 psi
Seriously, You might outflow the F head... Jul 30, 2007 - 9:00 AM Kerr1 i thought u could crack the head w/ too much boost... Jul 30, 2007 - 10:08 AM x_itchy_b_x to many unkown factors to answer that question acc... Jul 30, 2007 - 10:21 AM NuclearHappineS why do you ask ?
how much power do you want to ma... Jul 31, 2007 - 5:13 PM Kerr1 o...well do u think stock pistons can handle 15psi... Aug 1, 2007 - 7:13 PM Kerr1 so low compression pistons wouldnt b a bad way to ... Aug 2, 2007 - 6:24 AM x_itchy_b_x Low compression would be a good start if you wante... Aug 2, 2007 - 7:01 AM lagos QUOTE(king_wsk @ Aug 2, 2007 - 6:20 ... Aug 2, 2007 - 10:17 AM lagos QUOTE(Kerr1 @ Aug 2, 2007 - 7:24 AM)... Aug 2, 2007 - 10:22 AM x_itchy_b_x for WI on an NA im pretty sure they use an rpm ... Aug 2, 2007 - 10:41 AM lagos cali only gets 91. still, if your pinging on 91, ... Aug 2, 2007 - 11:57 AM Kerr1 for the 3sgte swap its like 4000 and thats if u do... Aug 2, 2007 - 4:36 PM
presure2 QUOTE(Kerr1 @ Aug 2, 2007 - 5:36 PM)... Aug 3, 2007 - 5:28 AM Kerr1 QUOTE(presure2 @ Aug 3, 2007 - 10:28... Aug 3, 2007 - 6:29 AM presure2 QUOTE(Kerr1 @ Aug 3, 2007 - 7:29 AM)... Aug 3, 2007 - 11:53 AM lagos QUOTE(Kerr1 @ Aug 2, 2007 - 5:36 PM)... Aug 2, 2007 - 8:30 PM Kerr1 QUOTE(lagos @ Aug 3, 2007 - 1:30 AM)... Aug 2, 2007 - 9:39 PM lagos you do realize that most 3s swaps are not awd, rig... Aug 2, 2007 - 10:36 PM Kerr1 yea...i know....but if i did it thats how it would... Aug 3, 2007 - 6:25 AM quantumspec1 I'm going to have to agree with just snagging ... Aug 3, 2007 - 7:26 AM lagos whats your horsepower goal for the car? Aug 3, 2007 - 10:36 AM lagos troof ^ Aug 3, 2007 - 11:59 AM NuclearHappineS the stock compression ratio will limit you to 8-12... Aug 3, 2007 - 1:42 PM Kerr1 im plannin on doin head wrk to the new 1 im buying... Aug 4, 2007 - 12:29 AM Kerr1 the mr2t pistons wont fit if i bore it .020? i thi... Aug 4, 2007 - 12:38 AM lagos QUOTE(Kerr1 @ Aug 4, 2007 - 1:29 AM)... Aug 4, 2007 - 2:02 AM NuclearHappineS the 5sfe is the overbored version of the S block..... Aug 4, 2007 - 7:24 AM blckcelica95 Kerr1 i did the exact same thing that you are pl... Aug 4, 2007 - 8:47 AM presure2 QUOTE(blckcelica95 @ Aug 4, 2007 - 9... Aug 4, 2007 - 9:16 AM Kerr1 QUOTE(presure2 @ Aug 4, 2007 - 2:16 ... Aug 4, 2007 - 10:40 AM Gary QUOTE(Kerr1 @ Aug 4, 2007 - 11:40 AM... Aug 4, 2007 - 12:12 PM Kerr1 yea...i guess that would b pretty kewl...i think i... Aug 4, 2007 - 1:16 PM lagos QUOTE(Kerr1 @ Aug 4, 2007 - 2:16 PM)... Aug 4, 2007 - 2:15 PM NuclearHappineS My take on things...
Build the following :
5sfe ... Aug 4, 2007 - 3:25 PM NuclearHappineS I guess what I'm trying to say... imho the mos... Aug 4, 2007 - 3:38 PM Kerr1 yea...but im not spendin that much...lol....this i... Aug 4, 2007 - 4:04 PM NuclearHappineS Some portwork numbers to give you an idea... this ... Aug 5, 2007 - 8:37 AM Kerr1 sweet info....thanx a lot nuke. Aug 5, 2007 - 12:26 PM |
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