Best Overall 911 engine |
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Best Overall 911 engine |
bd1308 |
Sep 3 2005, 10:08 PM
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#1
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
first, how is cooling with these cars? Do these engines drop valve seats like the t4 does?
second, which engine is considered a good buy ( not too much, widely available, and reliable) i'm just gathering information for what will eventually be a transplant... |
URY914 |
Sep 3 2005, 10:24 PM
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#2
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
Here we go again.... (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif)
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Mueller |
Sep 4 2005, 12:36 AM
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#3
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
they kept getting better thru the years, so you want the latest model you can afford with the least amount of miles.... |
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redshift |
Sep 4 2005, 12:57 AM
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#4
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
3.2 stroker with MFI.
M |
Jeroen |
Sep 4 2005, 05:46 AM
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#5
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914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
I don't think I ever heard about a 911 engine dropping valve seats
In a nutshell... 2.4 and smaller... watch for general wear, these engines are getting old 2.7 - known for pulled head studs 3.0 SC - pretty much bullet proof (bottom end of the 911 turbo), although lately, I've heard of a few with pulled headstuds as well 3.2 - same bottom end as the 3.0, but watch for valveguide wear comes with EFI and hydraulic chain tensioners 3.6 - early versions (up to 91 IIRC) are known to have oil leakage trouble at the cilinderbase (requires a full teardown to fix) Keep in mind that rebuilding a 2.0 costs about as much as rebuilding a 3.6 |
ArtechnikA |
Sep 4 2005, 06:09 AM
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#6
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
fine; over about 200HP you'll need a front oil cooler. no. they are all reliable. i'd hold out for an aluminum-case 2,8RSR with high-butterfly injection. but for the criteria you mentioned, it's hard to beat the 3,0 SC. |
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TimT |
Sep 4 2005, 06:15 AM
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#7
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retired Group: Members Posts: 4,033 Joined: 18-February 03 From: Wantagh, NY Member No.: 313 |
best overall 911 engine?
they would be the few that I built (IMG:http://www.914world.com/bbs2/html/emoticons/w00t.gif) |
Aaron Cox |
Sep 4 2005, 12:27 PM
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#8
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
britt, i think you need a CA 75/76 2.7 motor with thermal reactors (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)
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bd1308 |
Sep 4 2005, 08:01 PM
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#9
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
aaron:
if i've learned one thing on this board, i've learned that thermal reactors placed on 911 engines was one of the worst ideas ever...led to mucho uber heat in the engine compartment that subsequently led to engines with reduced life-spans. |
zymurgist |
Sep 5 2005, 07:08 AM
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#10
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"Ace" Mechanic Group: Members Posts: 7,411 Joined: 9-June 05 From: Hagerstown, MD Member No.: 4,238 Region Association: None |
Didn't they also combine the thermal reactors with a 7 blade engine fan that moved less air around the engine? Those motors were designed to have a short life due to excessive heat.
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redshift |
Sep 5 2005, 07:13 AM
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#11
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Well, who got Rudy's motor? (Otto's 3.HOLYSHIT RSR)
That is the motor you want, and I have connections. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) M |
ArtechnikA |
Sep 5 2005, 07:19 AM
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#12
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
5. i have one, purchased at a ridiculously low price (especially compared to the cost of a new 11-blade fan) to replace the OEM fan on my 2,2 that had its drive hub chewed up by DAPO's use of too few adjustment shims... i believe that in combination with the proper crankshaft pulley (there are at least 3 ratios from which to choose) that it will provide adequate cooling, require less power to run, and increase alternator speed for more power at low rpm. i haven't tested it tho, so i advise caution if contemplating this. however, there are a LOT of 5-blade fans sitting in people's spares piles... i don't agree they were designed tohave a short life, but i agree that was the reasonably foreseeable consequence of the other design decisions. BTW - only CA cars had the worst-case combinations of fan, reactore, and other stuff (EGR? air pump?). this was the era of the CA + 49-State car. the engine i'm retrofitting into my '71 is a 49-state '75 2,7S; it has an 11-blade fan, no sign of air injection, and AFAIK (short exhaust port studs) no thermal reactors. since that was 30 years and at least one rebuild ago, some of these things could have been changed, of course... i haven't decided what fan i'll run it with... |
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Jeroen |
Sep 5 2005, 07:30 AM
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#13
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914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
from what I learned, the 5 blade fan moves just as much air as the 11 blade fan
the reason they went back to 11 blade is that the 5 blade is more noisy |
ArtechnikA |
Sep 5 2005, 07:41 AM
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#14
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
i'd need to see your source on that one, especially since they went back to the 11-blade fan for the cat cars (in the face of increasingly stringent noise regulations). they did play around with pulley ratios a lot.
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Sammy |
Sep 5 2005, 09:08 AM
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#15
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. Group: Members Posts: 1,190 Joined: 21-January 03 From: Orange, Ca Member No.: 178 |
3 liter with the dilavar lower head studs replaced with steel.
Bulletproof and in most cases good for several hundred thousand miles. |
Jeroen |
Sep 5 2005, 09:22 AM
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#16
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914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
IIRC, it was quoted from Paul Frere's book on the Bird BBS |
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airsix |
Sep 5 2005, 04:10 PM
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#17
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I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
Best 911 engine? I'd have to go with the GT-1 derived engine in the current GT3.
-Ben M. |
jd74914 |
Sep 5 2005, 06:48 PM
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#18
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
2.2S most power per lter from the factory
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Aaron Cox |
Sep 5 2005, 07:04 PM
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#19
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
906 motor... 220 HP from 2L |
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Maltese Falcon |
Sep 5 2005, 07:31 PM
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#20
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Advanced Member Group: Members Posts: 4,645 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Hey, don't bash thermal reactors ('75-'77 2.7's) the reactor replacement (shorty headers) made me beaucoup rich in the late '70s (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
The best 911 engine , and coolest running is this one --my CHT's dropped 75 f --top fan VS front fan. Marty Attached thumbnail(s) |
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