3.8 engine conversion ? how much ?
02-08-2013, 11:56 PM
#31
You forced me to use my Jedi powers of interwebs searching:
The completely new motors:
•do not have an intermediate shaft
•have 40% fewer engine components
•have the water pump is mounted outside the engine for easier service
•have a water pump th that pushes 20% more volume
•are fitted with DFI (direct fuel injection)
•do not require a secondary air-injector system like the 996 and early 997 motors
•are more fuel efficient (sorry, I don't recall the percent improvement)
Not too shabby I suppose. I didn't feel any of that in the seat, but it's there I can't deny.
The completely new motors:
•do not have an intermediate shaft
•have 40% fewer engine components
•have the water pump is mounted outside the engine for easier service
•have a water pump th that pushes 20% more volume
•are fitted with DFI (direct fuel injection)
•do not require a secondary air-injector system like the 996 and early 997 motors
•are more fuel efficient (sorry, I don't recall the percent improvement)
Not too shabby I suppose. I didn't feel any of that in the seat, but it's there I can't deny.
385hp 0-60 in 4.1s $50k Can you feel it now?
Sorry I had to cheat hehe....no question a 3.8 will kick ***.
02-09-2013, 09:13 AM
#33
Rennlist Member
Thread Starter
http://www.autotrader.com/cars-for-s...gIndex=3&Log=0
385hp 0-60 in 4.1s $50k Can you feel it now?
Sorry I had to cheat hehe....no question a 3.8 will kick ***.
385hp 0-60 in 4.1s $50k Can you feel it now?
Sorry I had to cheat hehe....no question a 3.8 will kick ***.
02-10-2013, 03:14 PM
#34
Three Wheelin'
We didn't need tune the ecu. But I may decide to get a custom tune at some point. The motor made 330 rwhp and 300 rwtq. The dyno test was done with only 100 miles on motor. I'm sure she is stronger now. You need to drive my car before you commit to an upgrade. Actually, I think it would be fun to drive a 3.6 again to gauge the power gains.
that's a lot of power... do you have a torque/hp curve you can post?
02-10-2013, 03:31 PM
#35
Rennlist Member
Last edited by Hardback; 02-10-2013 at 03:48 PM.
02-10-2013, 05:20 PM
#36
Three Wheelin'
do you have high flow cats on that?
I know the GT3 torque is a little flatter and higher from 5000 and beyond ... but heck that's a $40K motor... the GT3 gears are also taller than the 996 which probably explains why you are keeping up in a strait line..
this thing must fly at the track... I bet you never shift above 6500 ??
02-10-2013, 11:03 PM
#37
Rennlist Member
nice good torque from 3500-6500 rpm.... !! not that you need it but a good set of cams would really flatten out the top region but I don't know if it's worth the headache if any...
do you have high flow cats on that?
I know the GT3 torque is a little flatter and higher from 5000 and beyond ... but heck that's a $40K motor... the GT3 gears are also taller than the 996 which probably explains why you are keeping up in a strait line..
this thing must fly at the track... I bet you never shift above 6500 ??
do you have high flow cats on that?
I know the GT3 torque is a little flatter and higher from 5000 and beyond ... but heck that's a $40K motor... the GT3 gears are also taller than the 996 which probably explains why you are keeping up in a strait line..
this thing must fly at the track... I bet you never shift above 6500 ??
02-10-2013, 11:39 PM
#38
Nordschleife Master
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To OP: Phil is your car a 3.4 or 3.6? I ask because installing 3.8 sleeves & pistons with a 3.4 crank & rods gives you something like a 3.6+ but definitely not a 3.8. Very, very torquey though. My engine builder is building 3 of them right now and one's for me. Ask if you're interested in more details....
02-11-2013, 11:00 AM
#39
Rennlist Member
SAE corrected I assume?.... For a non-flashed ECU it's running pretty lean, almost too lean. Have you ever connected a PWIS and checked the ECU?
To OP: Phil is your car a 3.4 or 3.6? I ask because installing 3.8 sleeves & pistons with a 3.4 crank & rods gives you something like a 3.6+ but definitely not a 3.8. Very, very torquey though. My engine builder is building 3 of them right now and one's for me. Ask if you're interested in more details....
To OP: Phil is your car a 3.4 or 3.6? I ask because installing 3.8 sleeves & pistons with a 3.4 crank & rods gives you something like a 3.6+ but definitely not a 3.8. Very, very torquey though. My engine builder is building 3 of them right now and one's for me. Ask if you're interested in more details....
When the motor was being built Logan aka Logray was also building his 3.4 to 3.6 upgrade. He felt he his motor was running lean and actually switched to 3.6 injectors. That got me thinking if I should switch to the 3.8 injectors. However, my mechanic said it wasnt necessary at that time. I would appreciate any insight you could offer on this subject.
02-11-2013, 11:55 AM
#41
Rennlist Member
Thread Starter
My engine is a 3.6, but please share your information about your build and what it means in terms of parts being changed/upgraded and also cost.
Do you think any parts removed could be resold ? My engine works perfectly so may be the pistons have value for someone else...
02-11-2013, 01:14 PM
#42
Pro
Does not look lean to me, as a general rule most NA motors are aiming for around 14:1 Afr, FI cars closer to 12 to one or lower.On tip in cars are usually lean due to emissins and fatten up under WOT. I would get a custom tune though as i am sure you are leaving power on the table even from an optomized tuning perspective vs a set on kill tune. Nice numbers though!
02-11-2013, 01:43 PM
#43
Rennlist Member
Another plus to upgradeing the engine beyond what is available from the factory is the engine belongs to you. If the car is stolen usually it is recovered & even if it is wrecked &/or totaled you can transfer the engine to another car.
02-11-2013, 03:12 PM
#44
Does not look lean to me, as a general rule most NA motors are aiming for around 14:1 Afr, FI cars closer to 12 to one or lower.On tip in cars are usually lean due to emissins and fatten up under WOT. I would get a custom tune though as i am sure you are leaving power on the table even from an optomized tuning perspective vs a set on kill tune. Nice numbers though!
02-12-2013, 01:38 AM
#45
Instructor
I think the 997.2s are going to surprise people.
The 991 feels like the 996 to me. They arent moving well and Porsche is doing, IMO, *unprecedented* lease deals on them - almost BMW level.
The 991 is bigger, and more clinical than ever, and has some visual cues that people seem to critique much like the 996 did.
I wouldnt say the 991 will be *as bad* as the 996 (thanks to the internet I think the 996 will go down as the worst valued 911 in history), but I don't think its going to put significant pressure on the 997.2 which very well may be seen as the "last traditional 911 that is modern yet doesnt blow up and isnt completely sanitized"
Time will tell, but I think there will be a big difference between 997.1 and 997.2 in value as a result of the massive and endless IMS FUD. Meanwhile, I suspect that the 996 will continue to depreciate at a quicker rate. In other words, whatever the "sell 996, buy 997.2" spread is now? By the time the 997.2 reaches whatever lower price point, I think the 996 will be even lower proportionately and that much harder to sell.
I grapple with this same question... Sometimes I think that ultimately I'd want either a turbo or a 997.2 and I frequently think that I should cut and run sooner rather than later and stay "Porscheless" until I can afford to make the jump. My *only* hope is that the 996 values at least level off. I had thought they were leveling but I'm not so sure lately.
The 991 feels like the 996 to me. They arent moving well and Porsche is doing, IMO, *unprecedented* lease deals on them - almost BMW level.
The 991 is bigger, and more clinical than ever, and has some visual cues that people seem to critique much like the 996 did.
I wouldnt say the 991 will be *as bad* as the 996 (thanks to the internet I think the 996 will go down as the worst valued 911 in history), but I don't think its going to put significant pressure on the 997.2 which very well may be seen as the "last traditional 911 that is modern yet doesnt blow up and isnt completely sanitized"
Time will tell, but I think there will be a big difference between 997.1 and 997.2 in value as a result of the massive and endless IMS FUD. Meanwhile, I suspect that the 996 will continue to depreciate at a quicker rate. In other words, whatever the "sell 996, buy 997.2" spread is now? By the time the 997.2 reaches whatever lower price point, I think the 996 will be even lower proportionately and that much harder to sell.
I grapple with this same question... Sometimes I think that ultimately I'd want either a turbo or a 997.2 and I frequently think that I should cut and run sooner rather than later and stay "Porscheless" until I can afford to make the jump. My *only* hope is that the 996 values at least level off. I had thought they were leveling but I'm not so sure lately.