A guy I know has a 91/92 300ZX Twin Turbo Auto. Stock except for catback and upped the boost to 16. Anyhow top end it flys.Track times at 5000 feet 60 feet 2.6 ouch 1/4 14.2 @ 106mph. Any ideas how much hp his setup would produce? Stock I think they run 9 boost producing around 300hp. Nice car.

 

He will not have that engine long at 16 pounds of boost. Is he using a boost controller?? I am now in the process of building a second engine for my twin turbo and have learned a lot about Z's in the last 6 years. I am dissapointed to read that his Z only did 14.2 in 1/4 with 16 pounds of boost. Does he have an aftermarket boost gauge??

 

2KSVT150GP,
He does have a boost conroller. I think he has a gauge. His tyres a pretty shot hence the 2.6 60 time. Did you notice this is at 5000 feet? So I guess that would be more like 13.2 at sea level. Then with good tyres mid 12s? What kind of boost would you say is safe for a stock Z? Also any good links? I would like to learn more about these cars. I checked out the engine. Man talk about a tight fit. By the way what hp would you think? Maybe 400.Thanks for the info.

 

I had a 1990 300ZX Twin Turbo about 4 years ago. Had a boost controller, down pipe, straight pipe,Greddy cat back exhaust,and a K+N filter. Ran a 13.4 @ 104 mph,and 330 RWHP. The problem with those cars is bad traction it fish tails alot.

 

The automatic in those is not great for performance either.

------------------
2000 Silver Lightning 13.82 (stock)
PSP 4-way
PSP Filter Kit
PSP Lower Pulley
Level 10 Shift kit
Snug-Lid
In the works:
Level 10 converter
4-Link

 

Thanks for the info.

 

Here is the poop on the 300zx, stock it will run 13.8~14.0 easy. Even more so if it is an automatic trans versus manual. Automatics are easier to get off the line than manuals. The stock Z makes 300 hp, when you add a chip it adds about 60 hp. Then add exhaust and filter for an extra 36 hp. Stock boost is about 8.0~8.5 controlled.
The boost controller should not be added without the exhaust and filter, because the engine needs to breath and get rid of the air.
Your friends Z is at about 350~365 hp with just a boost controller during its peak 3000~5000 rpm. If his tires are shot with no tread these would be better than new tires at the track. The best links for performance parts are: www.jimwolftechnology.com and www.stillen.com
I would be happy to advise on any products or accessories available for 90~96 300ZX, but it would be better to email me:

GP300ZXTT@aol.com