PrecisionH23a

We just got our new dyno installed and we broke her in with a few nice set-ups that we have been working on finishing up.

GT40R 2.0 GSR




H22a - GT35R



Both set-ups were using 1000cc injectors. The h22a hit 90% duty cycle at 518whp at 21psi so we were not able to break the 600whp marker like we originally planned for. I knew we would most likely run out around 530-550 and we even tried going from 40psi of fuel pressure to 50psi and nothing helped out too much. The customer will be bringing this set-up back in a few weeks for a set of 1600's and we'll try and hit low 600 with it. So for you guys with larger displacement motors don't always go by what you read on the internet because a 500whp 2.2L motor consumes much more fuel than 500whp B16a.

The B series however had fueling problems as well. On 23psi after 8000 the engine would go lean. We narrowed it down to being the fuel pump as the culprit since adding more fuel did nothing. When you guys buy Walbro 255 units make sure you get the GSS342 and not the GSS317. The 342 is the high pressure and the 317 is the low pressure pump. Unfortunately we were not able to monitor the fuel gauge during the pulls but looking back through the pulls it leaned out on a 480whp pull as well.

We'll see how this gt35r h23a does tomorrow. I have a feeling it will run out of injector again in the low 500's. Here's a pull from it with just street-tuning.

narfdanarf

Pretty neat are these cars in the charleston area? Not to much seems to go on around here. I'd like to stop by and say hi, check out your shop sometime or something.

boostismycrack

Good job anthony, i hope my 1000cc's don't run out of fuel at low 500's!

PrecisionH23a

These cars are not locals. I should have the shop all set up and running in the next 2-3 weeks. Just check with me about swinging by