How would you build a 1000 hp 928 motor.
06-09-2009, 02:03 AM
#46
Rennlist Member
No, just 2nd for turn 11, and 3rd through 5th everywhere else. (its a traditional H pattern 5 speed.) Man, he goes through the gears fast . 1000hp what do you expect!
http://video.yahoo.com/watch/1255895/4410611
http://video.yahoo.com/watch/1255895/4410611
06-09-2009, 03:51 AM
#47
I know I didn't just read something about a 1000hp AWD supra. I have a good friend with a 2WD! supra than dyno'd 680 on pump gas. On race gas obviously it was a bit more with the boost controller bumped up. It held up decent until he power-shifted with three people (one prettly big) in the car and it broke the tranny. Another time it munched a diff. for similar reasons. Driving with half a brain it was pretty tough and driveable. Now it makes an honest 1100 at the crank and has a turbo 400 and it's still not too bad. Obviously steam rollers are part of the equation (mickey thompson e.t. streets most of the time). I think displacement is an issue. Large displacement motors make so much torque abruptly it's harder to modulate the throttle. Another friend has a built supercharged viper and it hits so hard it's frightening, but the supra still pulls it. I don't want to start WW3, but I think excessive torque, or massive torque that can be applied nearly instantly (monster motor, monster motor w/ nitrous or blower) is what makes it difficult and hard on the driveline.
06-09-2009, 04:10 AM
#49
Three Wheelin'
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You are talking about other cars. you want a 4.11 ratio, leave your car in 3rd and there is you 4.5:1. 
. Oh you have 2 gears below that, same as most american iron. Lets not turn this into a gear discussion, but look at the ratios as total ratios, not "4.11".
If you are talking, new gears like stronger gears Im with you.
You wont need a close ratio gear box and a big 928 engine to get the most out of it. 700hp or 1000hp.
Gears as they are:
1st 50mph
2nd 80mph
3rd 118mph
4th 154mph
With 1000hp, these gears would be pretty ideal. with a flat hp curve, you could have 1000hp at all speeds.
Launch would be tricky, but after 50mph, you could put the hammer down, no problem with DOT rubber.
. Oh you have 2 gears below that, same as most american iron. Lets not turn this into a gear discussion, but look at the ratios as total ratios, not "4.11". If you are talking, new gears like stronger gears Im with you.
You wont need a close ratio gear box and a big 928 engine to get the most out of it. 700hp or 1000hp.
Gears as they are:
1st 50mph
2nd 80mph
3rd 118mph
4th 154mph
With 1000hp, these gears would be pretty ideal. with a flat hp curve, you could have 1000hp at all speeds.
Launch would be tricky, but after 50mph, you could put the hammer down, no problem with DOT rubber.
as far as 1000hp corvettes are concerned. i can google and pull up like 60 Z06 corvettes with 1000 crank and wheel hp.
Seeing as how the turbo 944 could get 500 crank with a large turbo and head gasket, so why couldn't twin turbos get a 5 liter 928 1000hp? Well mainly there is no freakin room to do it, but not that it couldn't be done
06-09-2009, 04:27 AM
#50
Former Vendor
Criteria:
1. Has to be a 928 block
2. No nitrous
3. Has to be streetable, not necessarily a daily driver, but drivable.
4. Actual 1000 BHP, not the equivalence by making the car lighter
What year/block would you use, OB? S4? GT? GTS?
What internal modifications, ie stroker, compression, etc?
What external modification, injectors, ITB, etc?
What power adder(s), turbo, twin turbo, SC, twin SC, or combination?
How durable would this motor be?
Also, what about the rest of the driveline, what clutch, TT, transmission, gearing, etc?
Ballpark cost of your entire driveline?
And lastly, what model would you put the engine in?
I'm trying to make a list and plan of action for when I'm rich.
1. Has to be a 928 block
2. No nitrous
3. Has to be streetable, not necessarily a daily driver, but drivable.
4. Actual 1000 BHP, not the equivalence by making the car lighter
What year/block would you use, OB? S4? GT? GTS?
What internal modifications, ie stroker, compression, etc?
What external modification, injectors, ITB, etc?
What power adder(s), turbo, twin turbo, SC, twin SC, or combination?
How durable would this motor be?
Also, what about the rest of the driveline, what clutch, TT, transmission, gearing, etc?
Ballpark cost of your entire driveline?
And lastly, what model would you put the engine in?
I'm trying to make a list and plan of action for when I'm rich.
You don't, cause you can't.
06-09-2009, 06:37 AM
#51
Three Wheelin'
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Location: Bournemouth, Dorset, UK.
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Brett,
You implied that a 5.0L engine could not achieve 1000BHP without NOS.
That is what people are jumping on you about.
How about this car http://www.terra2imports.ca/import-j...3943018935.htm
You implied that a 5.0L engine could not achieve 1000BHP without NOS.
That is what people are jumping on you about.
How about this car http://www.terra2imports.ca/import-j...3943018935.htm
Hi
I didn't say a 5.0 engine couldnt do 1000 hp.....
I answered the original question about a 1000 hp 928 engine....
All the best Brett
06-09-2009, 09:06 AM
#52
Rennlist Member
No, just 2nd for turn 11, and 3rd through 5th everywhere else. (its a traditional H pattern 5 speed.) Man, he goes through the gears fast . 1000hp what do you expect!
http://video.yahoo.com/watch/1255895/4410611
http://video.yahoo.com/watch/1255895/4410611
06-09-2009, 10:28 AM
#53
Drifting
Thread Starter
But why not? An answer like this isn't worth posting or reading because there's nothing to substantiate your claim.
Why can Bugatti produce a (so far) dependable 1k HP driveline?
Why can someone build a 1k HP GT-40?
Why can someone build a 1k HP viper?
I have no doubt it can be built, the question is drivability and dependability, I believe.
Why can Bugatti produce a (so far) dependable 1k HP driveline?
Why can someone build a 1k HP GT-40?
Why can someone build a 1k HP viper?
I have no doubt it can be built, the question is drivability and dependability, I believe.
06-09-2009, 10:51 AM
#54
Race Car
If a Ford GT can get 1000hp to the wheels on pump gas and no N2O, there is no reason why a 928 block can't do the same. Cement the open block, stick a stronger transmission and build a custom torque tube. Use two big turbos and lower the compression with 951 pistons. Computer-controlled boost depending on gear is supremely easy these days. Aren't there 951's that are still 2.5 liters and putting out 500hp to the crank?
Dan
'91 928GT S/C
475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft
06-09-2009, 11:03 AM
#55
Rennlist Member
My 2.5 Liter 951 was putting out 500 hp to the crank...with 20 psi of boost.
Streetable yes, Reliable...not really.
Streetable yes, Reliable...not really.
Last edited by RKD in OKC; 06-09-2009 at 12:02 PM.
06-09-2009, 11:29 AM
#56
Breaking stuff, is well, understandable I suppose. I think the 928 half shafts would stand up to quite a bit of power, even the solid ones on the early cars.
06-09-2009, 11:35 AM
#57
Nordschleife Master
But why not? An answer like this isn't worth posting or reading because there's nothing to substantiate your claim.
Why can Bugatti produce a (so far) dependable 1k HP driveline?
Why can someone build a 1k HP GT-40?
Why can someone build a 1k HP viper?
I have no doubt it can be built, the question is drivability and dependability, I believe.
Why can Bugatti produce a (so far) dependable 1k HP driveline?
Why can someone build a 1k HP GT-40?
Why can someone build a 1k HP viper?
I have no doubt it can be built, the question is drivability and dependability, I believe.
06-09-2009, 12:42 PM
#58
Three Wheelin'
All the cars listed that can do 1k were designed recently with engines making quite a bit more horsepower than a 928. The 928 was designed nearly 35 years ago for an engine with 300hp and 300ft/lbs of torque. The torque tube is too weak. The transmissions are too weak. The half shafts are too weak. You spend a small fortune strenthening these areas and the next areas of weak links will appear. Ripping out subframes or mounting points etc. It would seem much more prudent to start with a platform that was designed to handle more horsepower.
06-09-2009, 01:08 PM
#59
Rest in Peace
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All the cars listed that can do 1k were designed recently with engines making quite a bit more horsepower than a 928. The 928 was designed nearly 35 years ago for an engine with 300hp and 300ft/lbs of torque. The torque tube is too weak. The transmissions are too weak. The half shafts are too weak. You spend a small fortune strenthening these areas and the next areas of weak links will appear. Ripping out subframes or mounting points etc. It would seem much more prudent to start with a platform that was designed to handle more horsepower.
06-09-2009, 01:24 PM
#60
Drifting
Thread Starter
All the cars listed that can do 1k were designed recently with engines making quite a bit more horsepower than a 928. The 928 was designed nearly 35 years ago for an engine with 300hp and 300ft/lbs of torque. The torque tube is too weak. The transmissions are too weak. The half shafts are too weak. You spend a small fortune strenthening these areas and the next areas of weak links will appear. Ripping out subframes or mounting points etc. It would seem much more prudent to start with a platform that was designed to handle more horsepower.
Agreed, but this is the platform that I like.