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Discussion Starter · #1 · (Edited)
TVS 900 & Coolerworx Shifter install over the last few weeks.

Everything went rather smooth. Shifter needed a few adjustments. This certainly completes the driving experience. The TVS 900 is a great upgrade so far and I’m so glad to be done with the M45/Mechanical Water Pump setup. The next issue I need to work out involves the TMAP sensor. Since I’m running a 60mm pulley, boost hits 17.8psi and ends up triggering the CEL displaying code P0108 – Manifold Absolute Pressure/Barometric Pressure Circuit High Input. After reviewing the service manual I found that once TMAP to ECM input voltage reaches a threshold of 4.89volts or higher, you hit fuel cut and the CEL is triggered. I then spoke with Jan at RMW discussing two options: I could upgrade the cam which would lower PSI slightly below threshold due to increased airflow or use a split second voltage clamp. I decided to go with the VC3-100 voltage clamp. For those that don’t know, the split second voltage clamp wires into the TMAP sensor wiring and will not allow TMAP to ECM input voltage to exceed 4.80volts (factory setting) thus saving me from fuel cut and CEL’s so I thought...

Split Second Voltage Clamp VC3-100 Install:

I’ve completed the installation and if I shift no later than 6000rpm I won't trigger a CEL. Boost currently reads 16.4psi until I exceed 6000rpm. From 6-7000rpm I get a spike to 17.8psi triggering the CEL. I want to adjust the voltage clamp lower but I'm noticing that its starting to affect my tune as the A/F ratio is leaning out towards the top end. I've had my eye on a GRS front mount intercooler for some time now and spoke with Graham on pricing late last year. I was hesitant to buy one before I went down the TVS route and I'm thinking that with the FMIC installed it could lower boost levels to where I won't trigger the CEL anymore. If I still get a CEL, hopefully small adjustments will be needed on the voltage clamp to get me by until I can go the BVH route. IAT's with the TVS are already far better than the M45 including faster recovery. If I add a FMIC to the equation, temps should be lower with even faster recovery, right? I'm looking to order the GRS FMIC within the next week. If all goes to plan I'll make sure to take temperature readings with the stock IC vs the GRS FMIC and post those results up along with pictures of install etc.

If interested in installing the voltage clamp, you will have to review the service manual for splicing into the correct TMAP sensor wiring. Check out the pictures to see my installation. I wrote what each wire’s function is coming off the TMAP sensor connector in one of the pictures. Below is a link to the product and instructional video. I've heard stories of folks running a 17%+ pulley on the M45 which would trigger code P0108 at times.

https://splitsec.com/product/vc3-100-voltage-clamp
https://www.youtube.com/watch?v=coZVHLkzM7I

My current engine mods:
  • TVS900 - 60mm Pulley
  • Detroit Tuned Bypass Valve
  • DDM Works CAI
  • One Step Colder Spark Plugs
  • 450cc Injectors
  • RMW Shorty Header
  • Milltek Resonated Mid-pipe
  • Custom Center Exit w/ Vibrant Muffler
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Discussion Starter · #6 ·
Before going any further, waiting for a status on RMW's FMIC/Radiator kit first. I'll update asap.
94188649_10222849393172240_2410895267868966912_n.jpg
 

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Discussion Starter · #7 ·
Ordered the GRS FMIC. It should be here second half of July. For now, I'll install a catch can and post TMIC/FMIC results when everything arrives.
 

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Love this, have been reading up on the TVS900 kit recently and really want it to form part of long term plans (both due to cost and that i think it’s best for me to get use to the car as is on track etc before going for lots of power).

Had missed this thread previously, lots of useful information and fantastic work!

Definitely going to keep an eye on this one.
 

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Love this, have been reading up on the TVS900 kit recently and really want it to form part of long term plans (both due to cost and that i think it’s best for me to get use to the car as is on track etc before going for lots of power).

Had missed this thread previously, lots of useful information and fantastic work!

Definitely going to keep an eye on this one.
I'm doing the same. I like the fact that the kit will look and sound very much like the OE setup.
 

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Discussion Starter · #13 ·
This is how you build a car.

Whats the Suspension/Geo setup?
Thanks!

  • Fortune Auto 500 series coilovers
  • Alta rear sway bar
  • Front/Rear adjustable end links
  • Rear adjustable lower control arms
  • Powerflex bushings everywhere
Chassis Stiffening
  • TSW X-brace
  • WMW Strut tower brace
  • 4 point roll bar
 

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Discussion Starter · #16 · (Edited)
I thought fuel cut voltage is one of the ecu maps that you can adjust? I assume you've had it tuned for the TVS900 anyway.
From a recent conversation with Jan at RMW, he will be able to to provide a tune once I install the GRS front mount. The pressure drop across the front mount will bring boost below threshold so I shouldn't be getting the P0108 CEL code anymore. We can work out that issue if it comes up in the future. I uninstalled the Voltage Clamp anyways. Cool kit though. If anyone is interested I'll sell it. If the pressure drop across the front mount is substantial there's a good chance I will upgrade to a 55mm pulley and maybe, just maybe, a teflon intake gasket and dominator cam... We'll see though. I really didn't want to touch the long block until it blows up but it would be nice to have more mid-top end power at the track. :cool:
 

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Discussion Starter · #18 ·
Update: Finished installation enough for a test drive. 82F Ambient. Highway pulls 3rd,4th,5th gear to 7krpm. IAT's would not exceed 120F. TVS900 with 60mm pulley boost w/TMIC was 17.8psi max. With FMIC boost was 15.5psi max. Good amount of drop but the power still felt great because of the lower temps. Planning to talk to Jan this week about grabbing a 55mm pulley to bring those numbers up a little. Not sure how much boost I'll get with a 55mm but as long as I don't exceed 18psi I'll be content with that. I'll get more IAT info at the next track day as well.
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