Robert_K's JWT TT Build Thread
12-26-2007, 04:26 PM
#62
350Z 2+2
iTrader: (4)
Join Date: Jan 2004
Location: Omaha, NE
Posts: 1,890
Likes: 0
Received 0 Likes
on
0 Posts
The JWT turbos are water cooled, true, and I think the Greddys are as well, but they both have substansial oil lines going to them, indicating that they use oil lubrication.
Common sense would also tell you there is some sort of lubrication going on, and it sure ain't water. Thus, oil. And thus, the chance of coking at high temps.
Common sense would also tell you there is some sort of lubrication going on, and it sure ain't water. Thus, oil. And thus, the chance of coking at high temps.
12-26-2007, 04:51 PM
#64
Registered User
iTrader: (18)
Join Date: Oct 2004
Location: .
Posts: 9,482
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Devil Z
A turbo timer is "not needed" on any car. Even water cooled turbos will coke if you turn the car off right after running them hot for a while.
Besides, who in real life does a high boost run, and immediately brakes and turns off their car? It doesn't happen.
12-26-2007, 05:12 PM
#65
Good discussion about the turbo timer. However, for the time being its not on my list. I had one on my Evo 8 and notice that most Hwy driving usally is followed with 5-10mins of mild town driving before turning off the car.
My question (researching now) is what brand 550 injectors I want to go with.
My question (researching now) is what brand 550 injectors I want to go with.
12-26-2007, 07:04 PM
#67
Registered User
iTrader: (18)
Join Date: Oct 2004
Location: .
Posts: 9,482
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Robert_K
Good discussion about the turbo timer. However, for the time being its not on my list. I had one on my Evo 8 and notice that most Hwy driving usally is followed with 5-10mins of mild town driving before turning off the car.
My question (researching now) is what brand 550 injectors I want to go with.
My question (researching now) is what brand 550 injectors I want to go with.
12-26-2007, 08:57 PM
#70
Registered User
iTrader: (3)
Join Date: Mar 2006
Location: Los Angeles
Posts: 683
Likes: 0
Received 0 Likes
on
0 Posts
DW injectors for sure. I honestly have never heard of inconsistent flow with DW's. RC's are a different story. There have been quite a few stories of inconsistent flow rates with RC's. You can't go wrong at all with the DW's. I have 550's on my G and can flow enough fuel for 500whp. I'll never be running that much whp on my car but my point is that they work and flow very well.
12-28-2007, 05:58 AM
#71
Ordered Injectors.
Order the injectors today. Went with the DeatschWerks 550cc. As soon as Intense reopens I'm ordering the Walbro 220 fuel pump & Stillen oil cooler. 
12-28-2007, 06:37 AM
#72
350Z 2+2
iTrader: (4)
Join Date: Jan 2004
Location: Omaha, NE
Posts: 1,890
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Hexxum001
DW injectors for sure. I honestly have never heard of inconsistent flow with DW's. RC's are a different story. There have been quite a few stories of inconsistent flow rates with RC's. You can't go wrong at all with the DW's. I have 550's on my G and can flow enough fuel for 500whp. I'll never be running that much whp on my car but my point is that they work and flow very well.
12-28-2007, 06:40 AM
#73
Originally Posted by Dave 90TT
How's your idle with the 550's? I will never build my engine (well, unless it blows up), but considering I am almost maxing out the stock injectors with my JWT TT's, I am thinking about getting either 440's or 550's, but I don't want to lose the smooth idle of the stock injectors, and with 550's, I would worry about that.
12-31-2007, 12:44 AM
#75
Originally Posted by Dave 90TT
How's your idle with the 550's? I will never build my engine (well, unless it blows up), but considering I am almost maxing out the stock injectors with my JWT TT's, I am thinking about getting either 440's or 550's, but I don't want to lose the smooth idle of the stock injectors, and with 550's, I would worry about that.
12-31-2007, 01:54 AM
#76
350Z 2+2
iTrader: (4)
Join Date: Jan 2004
Location: Omaha, NE
Posts: 1,890
Likes: 0
Received 0 Likes
on
0 Posts
Well, yes, and no. At idle, the engine uses very little fuel. So, the larger the injector, the shorter the pulse it stays open for. However, there is alimit on how fast it will open and close. I don't think there will be a problem with 600's, and everyone has told me that they work fine. I know I have seen some engines with really big injectors have a really lumpy idle, but from what people tell me, 550's, or 600's aren't too big.
12-31-2007, 08:43 AM
#78
Registered User
iTrader: (18)
Join Date: Oct 2004
Location: .
Posts: 9,482
Likes: 0
Received 0 Likes
on
0 Posts
With the RC 750cc's and UTEC I have to give it a little gas on a cold start, but once it's started it idles just fine. I'll most likely be changing to DW 850cc injectors soon.