[ForcedFirebird]

That thing definately has some torque. The front end raising looks a lot like my neighbor's 327 Fiero (350hp crate) when I rode in it.

I can't wait for you to finalize the tune and really get on it

[Joseph Upson]

Originally Posted by ForcedFirebird

That thing definately has some torque. The front end raising looks a lot like my neighbor's 327 Fiero (350hp crate) when I rode in it.

I can't wait for you to finalize the tune and really get on it

It has a lot more in it, I just discovered in a bin comparison that I reduced spark timing by about 3 degrees or more as a precaution at 7 psi above 3000 rpm so that definately had a power reducing effect. Since the engine showed a lot of reserve against detonation despite being very lean in some boost areas it should have quite a bit of improvement left in it once tuned properly without upping the boost right away. 10 psi should make it very interesting to drive, 15 will very likely be scary as twice it has nearly gotten sideways on me.

[Joseph Upson]

Here are a couple of pictures lifted from the part of the video that was edited out. I have about 80% intercooler efficiency using a 27x6x3.5 unit with a 19" long core if I recall correctly. After install I realized I could have gone with a 7" to 8" tall unit but they are hard to find at the price I paid with the tank fittings centered. Hopefully the water/meth kit will bring me very close to 100%. My compressor efficiency will actually climb as I turn the boost up, right now it is at about 55% at 7 psi, that's why the non intercooled air temps were so high at 212 F. Turbocalc is pretty close to the values I'm seeing and it shows with my turbos that compressor efficiency will not improve above 70% until at least 10 psi is reached so my air temps should hold steady or decrease as boost is increased.

[Joseph Upson]

Still didn't get much if any tuning done although some extremely lean areas in the low rpm range were cleared up and probably pushed to the opposite extreme.
Advance Auto Parts shift cables need to be replaced with better quality cables, they are not rigid enough and can not take the heat, I left the car with a seized selector cable. You can note the delay between the 1-2 shift at the beginning of the video due to flimsy shift cables.

On a half tank of 87 octane the car ran very strong at what appeared to be as much as 8 psi, there is plenty of room for improvement at that boost level with higher octane fuel and installation of the alcohol injection kit. The two changes together should make 15 psi very easy and probably attainable with just one or the other. 12 psi should be more than enough given how strong it runs at 7psi.

Unfortunately the datalogs were saved to a corrupt file I discovered a little while ago so I have nothing to take snap shots of to show inlet temps and boost pressure.

I removed the mufflers as a precaution since the body supports have not been installed yet. Hopefully it will be finished by the end of the year.


http://videos.streetfire.net/video/T...out_680592.htm