turbo owners please help especially "jwt" owners take a look
Ouch. JWT TT + Tilton flywheel = 
That's really the problem with many of the TT setups at the drag strip, in my opinion. Getting traction is exceedingly hard when you're building boost so soon. You're going to trap higher due to the fact that you will be making more power with less boost on two smaller more efficient turbos, but controlling that power becomes a problem, especially on street radials. I've seen more novice drivers run fast ET's on ST's as traction is more managable. It's clearly the more streetable of the two for the typical driver.
That being said, it isn't boost level that blows motors, it's all factors combined. TT's are more efficient, meaning they make more power at lower boost due to the fact that they can flow more air. A ST needs slightly more boost at lower boost levels to make the same power, but that doesn't mean that it is more prone to blowing the motor by any means.
That's really the problem with many of the TT setups at the drag strip, in my opinion. Getting traction is exceedingly hard when you're building boost so soon. You're going to trap higher due to the fact that you will be making more power with less boost on two smaller more efficient turbos, but controlling that power becomes a problem, especially on street radials. I've seen more novice drivers run fast ET's on ST's as traction is more managable. It's clearly the more streetable of the two for the typical driver.
That being said, it isn't boost level that blows motors, it's all factors combined. TT's are more efficient, meaning they make more power at lower boost due to the fact that they can flow more air. A ST needs slightly more boost at lower boost levels to make the same power, but that doesn't mean that it is more prone to blowing the motor by any means.
Originally Posted by TheCajunStyle
Just figured I'd like to give a little input since I've tracked my JWT TT a few times this year...
Alberto is right, not too many TT owners are gonna come here to talk about their high 12 / low 13 ETs.
I will.
Last night was my third time ever at the track. My best run yet is a 12.7@111 with a 1.9 60' and 87mph at the 1/8 mile. This is with 384whp/338tq @ 6.8psi on Nitto 555Rs. A lot of the reason that I'm having trouble getting a lower ET is because of my Tilton clutch--it's either on/off and you can't really slip it at all. I either peel out all the way through 2nd or bog really bad. (yeah, I need more practice--simple as that)...I also need to explore getting a 3.3 final drive--I hit the rev limiter in 4th gear every single time with about 300ft to go--not enough time to shift into 5th. I know my trap could be a little higher--maybe 112-113.
All I'm trying to say is, out of the box, I'm happy, but there is always room for improvement
One of the biggest things that I like about the JWT TT setup is the low psi that the out of the box tune is set to--6.8psi. I think it's one of the better kits as far as amount of power produced at such a low psi. On a non-built engine, this also eases my worries (a little bit) of throwing a rod.
I'm not trying to be biased against any other kits at all--I'd love to own a ST setup as well. For the amount of money you put into a TT setup, you could put the same into a ST setup--yet end up with even more power. Everything has it's advantages/disadvantages.
One thing that I do encourage you to do though is to get an exhaust and test pipes with your turbo setup. You need to make the exhaust more free flowing to get those EGTs down. If you're going to get the JWT TT kit installed, go to a shop that has at least done a dozen installs of this particular kit...The reliablilty is determined by the success of the install.
Hope this helps your decision process.
Alberto is right, not too many TT owners are gonna come here to talk about their high 12 / low 13 ETs.
I will.
Last night was my third time ever at the track. My best run yet is a 12.7@111 with a 1.9 60' and 87mph at the 1/8 mile. This is with 384whp/338tq @ 6.8psi on Nitto 555Rs. A lot of the reason that I'm having trouble getting a lower ET is because of my Tilton clutch--it's either on/off and you can't really slip it at all. I either peel out all the way through 2nd or bog really bad. (yeah, I need more practice--simple as that)...I also need to explore getting a 3.3 final drive--I hit the rev limiter in 4th gear every single time with about 300ft to go--not enough time to shift into 5th. I know my trap could be a little higher--maybe 112-113.
All I'm trying to say is, out of the box, I'm happy, but there is always room for improvement
One of the biggest things that I like about the JWT TT setup is the low psi that the out of the box tune is set to--6.8psi. I think it's one of the better kits as far as amount of power produced at such a low psi. On a non-built engine, this also eases my worries (a little bit) of throwing a rod.
I'm not trying to be biased against any other kits at all--I'd love to own a ST setup as well. For the amount of money you put into a TT setup, you could put the same into a ST setup--yet end up with even more power. Everything has it's advantages/disadvantages.
One thing that I do encourage you to do though is to get an exhaust and test pipes with your turbo setup. You need to make the exhaust more free flowing to get those EGTs down. If you're going to get the JWT TT kit installed, go to a shop that has at least done a dozen installs of this particular kit...The reliablilty is determined by the success of the install.
Hope this helps your decision process.
Originally Posted by k3silk
you can only buy the jwt kit if it is installed at a shop that they allow and the only one in my area is aam. also as far as exhaust goes i wanted to keep my stock exhaust and cat will this be a problem with going with any FI?
Lost in Transit
Joined: Oct 2004
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From: Houston, TX
No problem, sorry sometimes I'll close something just out of locking it down till I can get a chance to ban the user and refresh the thread and go from the beginning. This helps make sure that the thread doesn't get out of hand, sometimes it'll take me a bit.
- I lock the thread.
- I have to ban the user.
- I have to update our banned user list and reason so that everyone knows why.
- Usually have to PM the user, but in this case it's not even worth my time.
- Then I have to go over the thread again, and see if it needs to be unlocked.
Oh yah I'm at work too hehe
- I lock the thread.
- I have to ban the user.
- I have to update our banned user list and reason so that everyone knows why.
- Usually have to PM the user, but in this case it's not even worth my time.
- Then I have to go over the thread again, and see if it needs to be unlocked.
Oh yah I'm at work too hehe
Originally Posted by taurran
It can be done... but isn't the ideal setup by any means. It will rob a lot of power and put more strain on the motor (heat wise).
Originally Posted by doug
i have stock cats and nismo exhaust... my EGT's are usually between 1000 - 1200
Also taking cats off allows the turbos to spool faster. The only reason I see in keeping the cats (stored in a shed) are for emissions purposes.
Originally Posted by silvrhand
- Usually have to PM the user, but in this case it's not even worth my time.
Oh yah I'm at work too hehe
If its a temp ban.. it will tell them the date and hour it will be lifted also
Originally Posted by TheCajunStyle
Those seem really low. I assume you're talking about normal cruising temps. There have been several other EGT threads--the average seemed to be 1400 at WOT.
Also taking cats off allows the turbos to spool faster. The only reason I see in keeping the cats (stored in a shed) are for emissions purposes.
Also taking cats off allows the turbos to spool faster. The only reason I see in keeping the cats (stored in a shed) are for emissions purposes.
Originally Posted by chimmike
Alberto isn't especially an excellent driver with slicks/radials on an ST vs. me or Taurran or most other TN ST guys. I ran a 12.5 on street tires with 30psi pressure, and Taurran ran a 12.3 on the same tires but 19s vs my 18s and he was running 20psi of air pressure.
k3silk-if you wanted to run a TN kit with a cat you can certianly do that, Id run without one because we can get by with our emissions system as I have before in the Z. Also yes I run a JWT clutch/fw combo I love it its not light enough to give me stupid wheelspin. With my 285's in warm weather I dead hook from a 1st gear roll.
Last edited by Alberto; Jun 15, 2006 at 08:06 AM.
i didnt know we could get by i had a turbo integra and i could never pass the sniffer with my turbo set up and it was a pain in the *** so i just wanted to pass the sniffer with a turbo set up.
Originally Posted by k3silk
i didnt know we could get by i had a turbo integra and i could never pass the sniffer with my turbo set up and it was a pain in the *** so i just wanted to pass the sniffer with a turbo set up.
I have a question, is it worth it to just stick with the JWT and keep the boost at the 6.5psi and have it tuned conservative? Or just wait and build the motor up? The only reason I am now partial to the JWT is the two seperate intercoolers setup that they have for the G coupe. I remember there was a thread about how some motors "went" due to aggressive tunes, and high boost causing headlift (headlift leading to enabling fluid to enter the combustion chamber), but am I wrong in thinking that a conservative tune coupled with 6.5psi (along with correct maintainence) is a safe way to go with very little to worry about? 