 Very useful information on building a 5sfe, mr2.com link |
 Mar 10, 2013 - 1:29 AM
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 Enthusiast  Joined Mar 8, '12 From Hanford/Fresno, Ca Currently Offline Reputation: 20 (100%)  |
I myself have a 5sfe and this is good heads up info if I ever decide and working on building power for my car. Sadly I'm restricted since I live in Cali.
http://www.mr2.com/forums/non-turbo-engine...-induction.html -------------------- |
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May 15, 2013 - 11:39 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
the design of the engine just cant support it. you will need cams, larger intake, larger valves or head swap. just too many things and the cost isnt worth it.
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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May 18, 2013 - 2:36 PM
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 Enthusiast Joined Jan 4, '12 From US Currently Offline Reputation: 6 (100%) |
QUOTE (Smaay @ May 16, 2013 - 12:39 AM)  the design of the engine just cant support it. you will need cams, larger intake, larger valves or head swap. just too many things and the cost isnt worth it. It mainly lacks compression, intake manifold and throttle body, rev limit and conviction. A similar engine is the VW ABF engine which is a 2.0L. It has a very similar head design (the valves are at an even narrower angle than on the 5S head) We got out 142whp with cams and a Megasquirt-I with bad rings from one of those. Normal compression numbers on those engines are 210psi on each cylinder, this one was throwing out 150 with the cylinders dry, 205 with cylinders wet with oil, so the rings were definitely bad. It's coming back with even more compression this time around. When I get a dyno sheet of the new engine, I'll post it up. 180whp out of this engine is entirely possible on 91 octane. I think the intake manifold can handle it, but a bigger throttle body is needed, as well as good cams and a set of rods to take it up to at least 7200rpm. I'm thinking 11.0:1 compression ratio in a 5S will make for good power with proper supporting mods. 9.5:1 compression is way too low for NA, I think it's what's killing the engine the most, then the cams, then the TB, then the stock exhaust, and then headwork if needed, but I doubt it is for ~180whp. Nobody has ever tried. That's the main issue. If I didn't want forced induction I'd shave the head and get 88mm pistons for at least 10:1 CR and do the whole NA mods and see how much I can get with a megasquirt-III running on 91 and then on 100-116oct. -------------------- 1993 Celica GT Coupe - sold
1994 Celica GT Liftback |
Posts in this topic
ILoveMySilly97 Very useful information on building a 5sfe Mar 10, 2013 - 1:29 AM
Smaay this is very old news
http://www.celicatech.com/f... Mar 10, 2013 - 9:48 PM
ILoveMySilly97 QUOTE (Smaay @ Mar 10, 2013 - 7:48 P... May 14, 2013 - 11:20 PM presure2 welcome to 2005 May 15, 2013 - 5:09 AM Special_Edy Lol trust me we have scraped the bottom of the bow... May 15, 2013 - 6:24 AM Syaoran Except nobody has ever built a 200hp 5sfe on pump ... May 15, 2013 - 7:40 PM Syaoran Knowing you, you'd argue a V6 swap is much mor... May 18, 2013 - 2:49 PM Bitter I think there's also the issue of the bore vs ... May 21, 2013 - 7:49 AM Syaoran QUOTE (Bitter @ May 21, 2013 - 8:49 ... May 22, 2013 - 1:19 AM Bitter Good information, since every high revving engine ... May 22, 2013 - 7:32 AM Special_Edy A couple things that may help you understand the b... May 22, 2013 - 8:05 AM ILoveMySilly97 I love where this post is going. A lot of good inf... May 22, 2013 - 5:03 PM Smaay once i go to the BAR ill document everything. the ... May 22, 2013 - 5:42 PM ILoveMySilly97 QUOTE (Smaay @ May 22, 2013 - 3:42 P... May 22, 2013 - 10:40 PM |
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