Purists who hate the chevy conversion.... this car is legit.
12-09-2012, 11:01 PM
#331
Rennlist Member
I also like my chevy 350 in my Tahoe and it does OK mpg for a big truck. I am getting anywhere from 12 to 15mpg depending how I drive and what I am towing. I would think it is around about 200rwhp. The OP is talking about building a carbed Chevy 350 to 400rwhp. Goodbye 15 Mpg and hello 6 to 8mpg.
T
Last edited by 77tony; 12-09-2012 at 11:27 PM.
12-10-2012, 01:42 AM
#332
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Just a short reply to a comment a couple notes back. I am not looking to make or get an arguement. I have just expressed my opinion and, indeed, being an old f##t, I'm sure my opinion would not agree with those half my age.
I own my 928 for the pleasure it gives me and, being an engineer of over fifty years, I do understand engineering decisions. I continue to contend that, for a GT automobile, the timing belt was pretty stupid. Anybody out there with bent valves?
I own my 928 for the pleasure it gives me and, being an engineer of over fifty years, I do understand engineering decisions. I continue to contend that, for a GT automobile, the timing belt was pretty stupid. Anybody out there with bent valves?
12-10-2012, 02:03 AM
#333
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that's just Porsche keeping their dealers in the we gotcha plenty of work for the next 40 years context.
how else could-ja sell them on pushing those 944s out the door ?
on the flagship cars, even more asinine.
how else could-ja sell them on pushing those 944s out the door ?
on the flagship cars, even more asinine.
12-10-2012, 02:29 AM
#334
Nordschleife Master
Bad water pumps, over tensioned belts, bad tensioner parts, failure to maintain tensioner parts or cam gears, and almost never an outright failure of a belt.
Be thankful for it. If by chance Porsche had designed the timing belt system to be bullet proof, non interference in all years its very likely most of use would never have been able to afford to buy a 928.
Be thankful for it. If by chance Porsche had designed the timing belt system to be bullet proof, non interference in all years its very likely most of use would never have been able to afford to buy a 928.
12-10-2012, 07:45 AM
#335
Three Wheelin'
I don't get it though... lots of other V8's use belts. Example the Lexus LS400 has the exact same sort of "WP/TB" job on the V8's, why is it that people get all broken up about it? You want them to use heavy *** chains?
12-10-2012, 07:50 AM
#336
Captain Obvious
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Yes, absolutly! If designed right, a chain setup will last the life of the engine. Make the chain tensioning pads servicable and there will be no problems what so ever. These pads usually only have to be chamged once in the life of the engine.
12-10-2012, 08:58 AM
#337
Nordschleife Master
Timing belt or chain, both last the lifetime of the engine, minus maybe half a second.
12-10-2012, 11:49 AM
#338
Race Car
Holy crap, this is still going? Let's sum it up:
1) Maybe 5% of the people in this thread are saying to not put a Chevy engine in a 928 because of "purist" motives. The other 95% are NOT saying that
2) Putting a Chevy engine into a 928 to make it a daily driver IS NOT CHEAP. Anyone who thinks it's cheap is in denial; this is the point of the 95% from above
3) Stock 928 engines and parts are still pretty easy to find
4) It is MUCH CHEAPER to rebuild a 928 engine than to convert it to a Chevy engine for a daily driver. Many things are simple in concept, but it's the little details that kill projects
5) Installing a supercharger system on a 928 with a properly working stock engine to make a daily driver is cheaper than swapping the engine to a chevy engine and will net similar performance numbers and reliability. If you think forced induction on a stock 928 engine will make it an unreliable daily driver only because it doesn't have "forged internals", you really should not be contemplating any kind of Porsche 928 upgrade due to inadequate research skills
Dan
'91 928GT S/C
475hp/460lb.ft
1) Maybe 5% of the people in this thread are saying to not put a Chevy engine in a 928 because of "purist" motives. The other 95% are NOT saying that
2) Putting a Chevy engine into a 928 to make it a daily driver IS NOT CHEAP. Anyone who thinks it's cheap is in denial; this is the point of the 95% from above
3) Stock 928 engines and parts are still pretty easy to find
4) It is MUCH CHEAPER to rebuild a 928 engine than to convert it to a Chevy engine for a daily driver. Many things are simple in concept, but it's the little details that kill projects
5) Installing a supercharger system on a 928 with a properly working stock engine to make a daily driver is cheaper than swapping the engine to a chevy engine and will net similar performance numbers and reliability. If you think forced induction on a stock 928 engine will make it an unreliable daily driver only because it doesn't have "forged internals", you really should not be contemplating any kind of Porsche 928 upgrade due to inadequate research skills
Dan
'91 928GT S/C
475hp/460lb.ft
12-10-2012, 01:26 PM
#339
Captain Obvious
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12-10-2012, 02:30 PM
#341
Sharkaholic
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Holy crap, this is still going? Let's sum it up:
1) Maybe 5% of the people in this thread are saying to not put a Chevy engine in a 928 because of "purist" motives. The other 95% are NOT saying that
2) Putting a Chevy engine into a 928 to make it a daily driver IS NOT CHEAP. Anyone who thinks it's cheap is in denial; this is the point of the 95% from above
3) Stock 928 engines and parts are still pretty easy to find
4) It is MUCH CHEAPER to rebuild a 928 engine than to convert it to a Chevy engine for a daily driver. Many things are simple in concept, but it's the little details that kill projects
5) Installing a supercharger system on a 928 with a properly working stock engine to make a daily driver is cheaper than swapping the engine to a chevy engine and will net similar performance numbers and reliability. If you think forced induction on a stock 928 engine will make it an unreliable daily driver only because it doesn't have "forged internals", you really should not be contemplating any kind of Porsche 928 upgrade due to inadequate research skills
Dan
'91 928GT S/C 475hp/460lb.ft
1) Maybe 5% of the people in this thread are saying to not put a Chevy engine in a 928 because of "purist" motives. The other 95% are NOT saying that
2) Putting a Chevy engine into a 928 to make it a daily driver IS NOT CHEAP. Anyone who thinks it's cheap is in denial; this is the point of the 95% from above
3) Stock 928 engines and parts are still pretty easy to find
4) It is MUCH CHEAPER to rebuild a 928 engine than to convert it to a Chevy engine for a daily driver. Many things are simple in concept, but it's the little details that kill projects
5) Installing a supercharger system on a 928 with a properly working stock engine to make a daily driver is cheaper than swapping the engine to a chevy engine and will net similar performance numbers and reliability. If you think forced induction on a stock 928 engine will make it an unreliable daily driver only because it doesn't have "forged internals", you really should not be contemplating any kind of Porsche 928 upgrade due to inadequate research skills
Dan
'91 928GT S/C
475hp/460lb.ft
12-10-2012, 02:52 PM
#342
Electron Wrangler
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It's almost halarious to read all the post and listen to all the stiff upper lips or mostly referred to as Die Hard Porsche Enthusiast, I replaced all my interior and most exterior lights with LED, is it no longer a thorobred? Porsche calls for Shell gas and Oil, I use Castrol. Michellins came on my car, I now ride goodrich. I know most of us has replaced engine parts with American built parts, alas, it is no longer a thorobred. Those who speak so loudly against the Chevy replacement are probly the ones who have replaced lots of parts with American made. The Day will and is coming, where you will probly no longer will be able to buy 928 engine parts... no not the near foreseeable future, but in the years to come. So what are we to do, build a glass partition around our cars and point to them when we have guest and say, that was a real classic. The shape of the car, its ageless beauty, and handling makes it a supercar for the ages... Replace a part anywhere on the car with a non-Porsche part and you have weakened your arguement. Your day is coming where you WILL have to make the same discision. So, park it or drive it. I have personally comtemplated the Chevy swap, but it just keeps on ticking. It will give up its ghost one day... (Renegade Conversions...how can I help you?) Yes, I'd like to place an order. Not many realist on here, but adamant hardheadedness. and one last thing, it will still be a Porsche.
I think most would agree that an engine transplant - from another 928 OR a from a chevy is a bigger deal to actually do and get right than some want to acknowledge. Often fixing what you have got may actually be easier/cheaper...
If either transplant is a used engine (as the 928 will be) you have all kinds of evaluation/rebuilding considerations, and the chevy has mating/match-up issues too.
Theorizing is one thing - doing it is more revealing... whatever you do (on anything) it's not usually as easy as you'd think - right?
Alan
12-10-2012, 05:37 PM
#343
Pro
Haven't all new engine designs gone to chains? I never hear timing belts mentioned when I read about new cars.
12-10-2012, 05:46 PM
#344
Rennlist Member
12-10-2012, 07:16 PM
#345
If we, collectively, had a brain, we would encourage people to do conversions.
Like I keep telling people that are putting on cheap fubber (rubber that is going to fail) fuel lines...."There's too many of these cars, still, for them to become uber valuable. more need to burn to cut down on the numbers. Go for it!"
Same thing applies to conversions.
Used, they are worth 1/20 of what the person invested.
I actually put them in the same category as used condoms....not very many people want them.
Like I keep telling people that are putting on cheap fubber (rubber that is going to fail) fuel lines...."There's too many of these cars, still, for them to become uber valuable. more need to burn to cut down on the numbers. Go for it!"
Same thing applies to conversions.
Used, they are worth 1/20 of what the person invested.
I actually put them in the same category as used condoms....not very many people want them.
With the fact that the 928 motor is already quite a nice motor, has 32 valves, I don't see as many reasons to do it to a 928. Especially if you are just going to put in an LT or something. If its some slick LS7 or something, I guess thats a good idea, but there are tons of C5s and C6s that can be had that would do just as well and there is no modding required to put the engine in.
E36 BMWs take these LS engines really well - those projects look great.