Alrighty, I have owned my '87 GN since 2000. I have done a little bit of power mods to the car, but mostly suspension and brakes. I am looking for a set up that will make my car a killer from a roll. With my tire/suspension set up I am not gonna be good outta the hole. I love the highway rolls and am looking for the most power (reasonably priced) with an un-opend motor with 71,000 miles on it.
My modifications are as followes...
Poston 3" downpipe
Poston two piece crossover
Cottons 3" test pipe
Flowmasater dual cbe
40lb injectors
adj. fuel press reg.
walbro pump, hotwired
ta-49
buickgn.com big mouth intake with LS1 MAF
SMC alky
poston's 93 chip
2800 stall converter
Hotchkis TVS w/ tubular uppers
17 TTII's w/ BFG g-force KDWs
Baers at all 4
Now the current problems with the car are listed below and I am going to be fixing them before the car comes out of storage.
cracked headers - getting welded and coated up this spring
bad maf - gotta get a new one from full throttle
bad battery - going with optima
old plugs - need input on brand/model
slipping trans - going to have rebuilt and an orange stripe thrown in
160 thermostat - car is starting to run warm
I am going to have some extra cash laying around in the next few months for the GN, on top of the parts above being replaced. I was going to get a new downpipe that bolts to the turbo and gets rid of the elbow and have it coated. I was thinking about a 70mm tb/plenum with rjc spacer, but have read that it might be a waste to do the 70mm at this stage in my car's life. Would the bigger tb/plenum/space make a difference for my top end power? I was thinking about going with the GT6131 turbo, but it seems that it isn't that much better than the 49 peformance wise. What turbo should I go with? I was going to put on an alluminum driveshaft to kill some rotating mass. After all of that I was going to have the car tuned and a chip burned for it (if that is possible). Some other things that I was goning to put on the car would be harder motor mounts and trans mount.
This is just what I have been thinking to do with my car. If you guys have any suggestions of what I should change up to make more power and what turbo/converter I should go with for some great top end with as little lag as possible (I can live with lag, but want as much boost as possible
) please let me know what I should do.
Nick
My modifications are as followes...
Poston 3" downpipe
Poston two piece crossover
Cottons 3" test pipe
Flowmasater dual cbe
40lb injectors
adj. fuel press reg.
walbro pump, hotwired
ta-49
buickgn.com big mouth intake with LS1 MAF
SMC alky
poston's 93 chip
2800 stall converter
Hotchkis TVS w/ tubular uppers
17 TTII's w/ BFG g-force KDWs
Baers at all 4
Now the current problems with the car are listed below and I am going to be fixing them before the car comes out of storage.
cracked headers - getting welded and coated up this spring
bad maf - gotta get a new one from full throttle
bad battery - going with optima
old plugs - need input on brand/model
slipping trans - going to have rebuilt and an orange stripe thrown in
160 thermostat - car is starting to run warm
I am going to have some extra cash laying around in the next few months for the GN, on top of the parts above being replaced. I was going to get a new downpipe that bolts to the turbo and gets rid of the elbow and have it coated. I was thinking about a 70mm tb/plenum with rjc spacer, but have read that it might be a waste to do the 70mm at this stage in my car's life. Would the bigger tb/plenum/space make a difference for my top end power? I was thinking about going with the GT6131 turbo, but it seems that it isn't that much better than the 49 peformance wise. What turbo should I go with? I was going to put on an alluminum driveshaft to kill some rotating mass. After all of that I was going to have the car tuned and a chip burned for it (if that is possible). Some other things that I was goning to put on the car would be harder motor mounts and trans mount.
This is just what I have been thinking to do with my car. If you guys have any suggestions of what I should change up to make more power and what turbo/converter I should go with for some great top end with as little lag as possible (I can live with lag, but want as much boost as possible
![Big Grin :D :D](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f600.png)
Nick