Boost problems

5

Asked by Sep 15, 2009 at 10:07 PM about the 1987 Nissan 300ZX

Question type: Car Customization

I've got an 87 turbo(the Z31 chassis), and I'm losing boost. It has an aftermarket bov, but it still has the erv(emergency release valve) on the intake plenum. I'm thinking it might be stuck open cause at the moment I'm only hitting about 4.5-5lbs, and I know from experience(had an 86 before) that they see 7lbs normally but can go up to 8 stock, which is when the erv activates. Should I just go ahead and junk it and plug the ERV hole?

4 Answers

285

You mean a wastegate? Dont plug it. Get it checked.

5

No, not the waste gate, the emergency release valve on the intake plenum on the VG30ET engines. The turbo is a T3 style with an external wastegate, this is to releave atmospheric pressure from the intake manifold.

65

check out 300zxclub.com, theyll help with any problems you might have.

1 out of 1 people think this is helpful.
5

Plug the ERV but make sure the aftermarket BOV realeses at 10lbs because the air might flow back tu the turbo and damage it. Remember, the Z31 turbo (t25) is a thrust bearing turbo, it's more vulnerable to serious damage if it over heats or if it over spins. Make sure you check all the components from the turbo to the plenum for psi leaks and check the vacuum lines from the turbo too. Change that old plenum for a 3.3L Pathfinder, you're gonna feel the difference...good luck.

Your Answer

Add photo

Related Questions

300ZX

Looking for a Used 300ZX in your area?

CarGurus has 156 nationwide 300ZX listings and the tools to find you a great deal.

ZIP:

Search Nissan 300ZX Questions

Nissan 300ZX Experts

#1 Tom Demyan
Tom Demyan
Reputation 440
#2 Jamie Staples
Jamie Staples
Reputation 280
#3 dandyoun
dandyoun
Reputation 230
View All

Related Models For Sale

Used Ford Mustang
361 Great Deals out of 44,495 listings starting at $1,000
Used Chevrolet Corvette
178 Great Deals out of 20,807 listings starting at $3,995
Used Toyota Supra
48 listings
Used Chevrolet Camaro
280 Great Deals out of 38,300 listings starting at $1,250
Used Nissan 200SX
15 listings
Used BMW M3
57 Great Deals out of 1,919 listings starting at $2,250
Used Mazda RX-7
54 listings
Used BMW 3 Series
1,384 Great Deals out of 37,799 listings starting at $1,500