Built Motor Guys...What do u regret? (Chapter 2 of was it worth it)
07-07-2008, 07:50 PM
#141
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I was looking back through some pictures of my car when I first bought it, when it just had wheels, an intake, and exhaust. I really enjoyed the car back then. I guess there is something to be said for simplicity of the car in its natural state.
07-07-2008, 09:30 PM
#145
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Originally Posted by Jason333
I always thought stereo was a waste of $$. I couldn't hear it anyway. I recently changed out my exhaust and went much quieter. After hearing Adam @ Z1's setup at Zdayz compared to my crap, I can def appreciate a nice high end sound quality setup.
07-08-2008, 07:18 AM
#146
Originally Posted by mrg1981
I have the same question. I have the 750CC RC injectors and would like to know what to look for if there is a potential problem. Thanks in advance.
Nonetheless, the posts were enough to cause some concern for me since I have RC Injectors going into my car. I therefore did some research on this subject. In the end, my conclusion is that my tuner (Japtrix) selected the right Injectors for me.
First, I searched the Internet, including other car forums. I found alot of very positive comments about RC Engineering Fuel Injectors. The few negative comments I found were generated by DYIs who eventually found out that they were using the wrong injectors for their application (e.g. used low impedance injectors when they needed high impedence injectors, etc.) or had not installed them properly.
I then contacted Kyle at Import Parts Pro and Roger at Japtrix, and they both say that the RC Fuel Injectors are very good. Kyle couldn't recall ever hearing about a problem with RC Fuel Injectors from qualified VQ tuners.
Roger indicated that Japtrix has installed alot of these over the last 5 years, and that he has seen only 1 or 2 bad ones. He also said that the RC Engineering customer service has been great and that his recollection is that RC Engineering takes care of any problems right away. He also said that he is running RC Fuel Injectors in his own car and that his car runs great.
In addition, at the beginning of my project, I myself contacted RC Engineering regarding Fuel Injector selection. After reading some of the posts in this and the G35 driver forum, I thought I might need larger fuel injectors than Japtrix had selected. I left a message and that day an Engineer from RC Engineering (who knew his shiat) called me back to help me out. He also spent quite a bit of time with me educating me about fuel injectors, fuel supply considerations, etc. I really appreciate that level of customer support. Of course, Japtrix had indeed selected the correct fuel injectors for my application.
I think I remember seeing other posts indicating that the RC Injectors may be a little more sensitive to tuning than the HKS Injectors, but if you have a tuner that knows what he is doing, it should not be a problem. Heck, imo, with the money you save using the RC Injectors, you could pay for a whole lot of tuning.
07-15-2008, 08:26 AM
#147
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Originally Posted by jumpin800agl
i would think you should still be able to get more than 400whp. Sounds like your tune is off by your description though. Did you have this build done locally?
09-07-2008, 03:35 PM
#149
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Awesome thread guys! Going with an APS TT set-up and this has helped alot
with the what/not to do.
Alberto I love your car and I hope that your regret on a built motor was just
a depression phase. One of the cars that's made me decide on a built TT set-up.
with the what/not to do.
Alberto I love your car and I hope that your regret on a built motor was just
a depression phase. One of the cars that's made me decide on a built TT set-up.
09-30-2008, 12:51 AM
#151
Please note that these are my personal regrets and personal opinions on how to avoid, others may not experience the same issues and/or have other ways to avoid them. Feel free to ignore any your don't agree with.
Regret: Buying UTEC
Issue: Trouble with big duration cams and idle / low rpm and TXS not releasing functions like cam control that I was told would be made available with future releases.
How I would personally try to avoid: Do your research on what your setup will need and save up for an ECU which has control of all your required parameters today.
Regret: Having to Rebuild Diff Multiple Times
Issue: Ring and pinion became worn and noisy, have rebuilt diff 3 or 4 times now.
How I would personally try to avoid: Jury still out on this as I haven't found solution or singled out issue. Love the ATS Carbon diff apart from this issue but don't want to risk more rebuilds. So Im going to attempt to address with best diff specialist around for rebuild, new metal based diff, custom billet spacers, replace ALL OEM rebuild parts for new, new ring and pinion, more frequent diff oil changes and a very gentle run in period.
Note: There seems to be others on this forum who have no issues with this diff so please take into consideration, do your research and make your own mind up.
Regret: Buying Clutch on Impulse with Not Enough Holding Power
Issue: Wasn't realistic with power needs
How I would personally try to avoid: By selecting a clutch that can hold current and future power requirements. From those clutches select the one that is the most streetable. Some drivability maybe sacrificed depending on your power levels but you cant have everything all the time.
Regret: Selling first Exhaust
Issue: Sold it looking for more power to do me over before TT were installed after engine build, ended up losing power and sounding worse. Been through 3 exhausts (TD and Y-Pipe) all worse than first choice. Going to buy original y-pipe exhaust for a second time so I can enjoy driving the car around until TTs are installed.
How I would personally try to avoid: If you current aftermarket exhaust doesn't annoy you and makes ok power, leave it alone. There are allot of worse options out there.
Regret: Buying UTEC
Issue: Trouble with big duration cams and idle / low rpm and TXS not releasing functions like cam control that I was told would be made available with future releases.
How I would personally try to avoid: Do your research on what your setup will need and save up for an ECU which has control of all your required parameters today.
Regret: Having to Rebuild Diff Multiple Times
Issue: Ring and pinion became worn and noisy, have rebuilt diff 3 or 4 times now.
How I would personally try to avoid: Jury still out on this as I haven't found solution or singled out issue. Love the ATS Carbon diff apart from this issue but don't want to risk more rebuilds. So Im going to attempt to address with best diff specialist around for rebuild, new metal based diff, custom billet spacers, replace ALL OEM rebuild parts for new, new ring and pinion, more frequent diff oil changes and a very gentle run in period.
Note: There seems to be others on this forum who have no issues with this diff so please take into consideration, do your research and make your own mind up.
Regret: Buying Clutch on Impulse with Not Enough Holding Power
Issue: Wasn't realistic with power needs
How I would personally try to avoid: By selecting a clutch that can hold current and future power requirements. From those clutches select the one that is the most streetable. Some drivability maybe sacrificed depending on your power levels but you cant have everything all the time.
Regret: Selling first Exhaust
Issue: Sold it looking for more power to do me over before TT were installed after engine build, ended up losing power and sounding worse. Been through 3 exhausts (TD and Y-Pipe) all worse than first choice. Going to buy original y-pipe exhaust for a second time so I can enjoy driving the car around until TTs are installed.
How I would personally try to avoid: If you current aftermarket exhaust doesn't annoy you and makes ok power, leave it alone. There are allot of worse options out there.
Last edited by mchapman; 10-01-2008 at 05:32 PM.
10-04-2008, 08:05 PM
#154
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I have been part of 3 VQ motor builds now and have learned a ton about this setup. My advise:
- Spend the money on a good EMS
- Over buy your clutch. it will just end up costing you more in the long run
- there is a big difference from a car <500whp and one that is 500+whp in terms of parts needed, traction, reliability, etc
- sometimes proper machine work and proper installation are more important than buying the absolute best parts
-keep things as simple as you can
-don't be short sighted and don't have tunnel vision... look beyond making the 500whp on the dyno and consider other aspects of making the car enjoyable to drive
and my most important lessons learned:
1.)18+ psi is too much for oem headgaskets
2.)DO NOT run underdrive pulleys, it isn't worth it
- Spend the money on a good EMS
- Over buy your clutch. it will just end up costing you more in the long run
- there is a big difference from a car <500whp and one that is 500+whp in terms of parts needed, traction, reliability, etc
- sometimes proper machine work and proper installation are more important than buying the absolute best parts
-keep things as simple as you can
-don't be short sighted and don't have tunnel vision... look beyond making the 500whp on the dyno and consider other aspects of making the car enjoyable to drive
and my most important lessons learned:
1.)18+ psi is too much for oem headgaskets
2.)DO NOT run underdrive pulleys, it isn't worth it
Great advice!
12-02-2008, 06:23 AM
#155
I have the aps TT installed on my Z. I went strickly by the kit specs. I too, changed clutch and flywheel and exhaust. In that, I know that I don't have the 500whp that it would put out. I push around 400whp. But I feel the car is safe. I enjoy the playtime with the big boys and still know my limits. I have the mind set that if I get beat, then They put more money in it than I did. I try to stay content with the power I have. It is still all fun to me. Win or lose, I still cross the finish line!
Last edited by cal_z; 12-02-2008 at 06:28 AM.
12-02-2008, 10:00 PM
#159
I regret going with the Clutchmasters FX600 in the beginning rather than the Carobnetics Triple Disk. The first time I launched the Clutchmasters FX600 hard I fried it. The Carbonetics is much beefier (and more expensive).
I also regret not just going ***** to the wall in the beginning. At first I went with a nice, slightly louder than stock APS 2.5" exhaust. Before ever firing the motor up, I had that pulled out and a Greddy Evo TT exhaust put in so I can be sure to get over 600 hp on pump gas.
I no longer have RC Injectors, but I can't really say I regret going with them. We had an idling issue, but due to a time constraint, did the shotgun approach and replaced the RC Injectors with HKS Injectors and had the ECU reflashed. The biggest effect on the improvement was probably the ECU, because the HKS injectors are so darn big the granularity of the adjustments at idle is not very good. Nonetheless, everything is working good now.
I went with the DDS Level 2 axles. At this point I am glad I did because some guys are having problems with their DDS Level 5 axles. Nonetheless, if I break my axles, I will certainly change my mind about this. So far the Level 2's are still holding.
Edit: I also regret crimping my Navigator wire while it was still plugged into the FCON. I also regret trying a WOT shift without first checking to make sure the rev limiter was properly kicking in. Hopefully I'll have no more regrets, but I doubt it.
I also regret not just going ***** to the wall in the beginning. At first I went with a nice, slightly louder than stock APS 2.5" exhaust. Before ever firing the motor up, I had that pulled out and a Greddy Evo TT exhaust put in so I can be sure to get over 600 hp on pump gas.
I no longer have RC Injectors, but I can't really say I regret going with them. We had an idling issue, but due to a time constraint, did the shotgun approach and replaced the RC Injectors with HKS Injectors and had the ECU reflashed. The biggest effect on the improvement was probably the ECU, because the HKS injectors are so darn big the granularity of the adjustments at idle is not very good. Nonetheless, everything is working good now.
I went with the DDS Level 2 axles. At this point I am glad I did because some guys are having problems with their DDS Level 5 axles. Nonetheless, if I break my axles, I will certainly change my mind about this. So far the Level 2's are still holding.
Edit: I also regret crimping my Navigator wire while it was still plugged into the FCON. I also regret trying a WOT shift without first checking to make sure the rev limiter was properly kicking in. Hopefully I'll have no more regrets, but I doubt it.
Last edited by ttg35fort; 12-29-2008 at 10:46 PM.
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