Any Split Second (URD) product tuners in California?

[Dawgz]

Can u post ur dyno charts?

[free]

double post.

[free]

Dyno'd my car today; max at the wheel figures were: 264hp and 267 lb. torque.

We ran into some trouble because the ECU was not reading boost below 3,500rpm. Basically my supercharger has not been boosting below 3,500 rpm, or my ECU has not been reading boost below 3,500rpm, and I'm not sure why.

He bypass'd the supercharger bypass valve, and the ECU read boost below 3,500rpm and showed 40lb torque increase. So, he recommended that I tap the supercharger and put a vacuum hose on it so that the ECU can read boost from the supercharger. We changed it back because he said if I keep the bypass of the s/c bypass on that it would wear out the supercharger which would be boosting all the time. Has anybody else had a similar problem as far as their TRD s/c not boosting at low rpm's? (My car is manual, not an automatic.)

Also, the stock injectors started to lean out above 6,000 rpm in 5th gear. He recommended larger injectors if I want to drive it at all rpms. So, the URD 305cc injectors should be the solution. Now that I think about it, I think I still have a set of supra injectors that I never used. I hope they're still good.

All in all i'm pleased with the results, which seem to be similar to those with 6lbs of boost. I would like to resolve the mystery of no boost at low rpms and I'm considering putting in the larger injectors.

I'd definitely recommend Church tuning as well.

Well, the original boost issue I had at the beginning of this thread was resolved by tapping the boost port on top of the supercharger. Can't believe I didn't figure that out. The port is not in view when you have the TRD strut brace on.

Since that dyno, I had my supercharger refurbished by PSE and added Supra injectors. My new numbers are as follows: 269whp & 260ft/lb. (My old dyno showed 264whp & 267ft/lb.) My AFR range is from 12.09 - 10.88.

So, my figures aren't really much different in terms of hp and torque. What is different:

1. On my recent dyno, I reached my peak hp at 94mph and peak torque at 72mph. Contrasted with my first dyno where I reached peak torque at 96mph and peak hp at 125mph. I'm guessing that the difference reflects better efficiency probably from the Supra injectors. Not sure though.

2. My AFR is safe at all rpm's now that I have the Supra injectors.

3. The boost level after 5,000rpm's went from 6lb up to 8lb. The dyno guy said this was from exhaust back pressure. It would have been nice to have a y-pipe, which would have brought that boost down.

That's it. (free formerly "Ian")

P.S. The car runs like a champion. Full steady acceleration from beginning to end. No missing or anything. Very consistent and steady. Love it!

Now I just need to fix this damn dent!

[Dawgz]

u want a ypipe?

[Eye8Pussies]

great numbers- and consistent with most people...actually, a little bit more than most, at that- good stuff!

[free]

u want a ypipe?

Earlier in the year I would have probably said "yep". But, I've stopped adding to the car. I just want to maintain the car's appearance at this point. I've spent a lot over the years and have to stop. The car is running good enough for me now even though I'm sure the y-pipe would help and is tempting.

[Dawgz]

u want a ypipe?

Earlier in the year I would have probably said "yep". But, I've stopped adding to the car. I just want to maintain the car's appearance at this point. I've spent a lot over the years and have to stop. The car is running good enough for me now even though I'm sure the y-pipe would help and is tempting.

120 bux