LS1Silverado05

iTrader: (41)

Picked up a 98 Z28 last week. This car is an M6, has a 99+ motor of unknown mileage on it... Dead stock down to the lid all the way to the stock cat-back. I am doing a tune up, and I'll throw some TR6's in it... The car had some fuel psi issues so I am swapping in a Walbro this week.

So... 98 Z28 M6... TR6s and a Walbro being the only mods... what can or should I spray at this thing, and what could it run?

**Ive had 5 of these so I do know the cars and the weak links, im just new to Nitrous and thinking i;ll have some fun seeing what I can push this car to run with basically no mods**

bongva

iTrader: (7)

Run br6ef's and not tr6's. lots of debate over those two plugs, but br6ef is going to be on the safe side for the reason that it is a non projected tip.

I'd spray it!

Had a buddy that had an ls1 goat that sprayed it. His car was bonestock, only thing he did was pull timing. he put a 150 shot on it.

Pete91

iTrader: (4)

Just spray the damn thing. Pull some timming 4-6 degrees. Throw in some br7ef's. I would start with 100 or even smaller. Check your tune up on the plugs make sure your plugs look ok and work your way up. I how ever would recommend a full exhaust but it's up to you.

Pete91

iTrader: (4)

Actually my first step would be a compression test with an un know motor. Make sure your not passing any oil through the rings

SHDY 5.7

Not to high jack,but I'm also curious about this. I aswell just picked up a 98 z28,a4 car. I'm getting ready to do full exhaust on it and a kit.

OP,are u doing wet or dry?

What's the better route? My car is stone stock also.

turtle93

I wouldn't go over a 100 shot unless it's just a toy

Neal@NitrousOutlet

Dry requires more tuning because you have to compensate for the fuel threw the computer/injectors. There is a lot of debate on which is better. Just remember the more dry you but in more the chances are you are going to have to do a fuel pump and injectors. With a wet system you have to worry about upgrading fuel pump but not injectors. Done right both are great. It all depends on how you want to set it up.

SHDY 5.7

I've usually always stuck to wet kits. So that's probably the route ill go.

Sales1@Texas-speed

I would have no problem spraying a 150 to it. Put a BR7EF plug in, and have it tuned for the nitrous and let the fun begin.

Chris@NitroDaves

100-150hp shot using BR7EF's Gapped @ 33 and you should be good to go. If you wanted to be on the safer side of the line then i'd retard the timing by around 2-4*.

LS1Silverado05

iTrader: (41)

I had NO idea the TR6s were such a debated item. Ill put them on the shelf and go with the BR7EF's then. Thanks for all the heads up...

Im VERY split on the wet vs dry thing. I have read endless threads on this and from what i see there are some very fast cars running both set-ups. I am leaning toward wet simply because by the time i buy injectors to support a bigger shot I would probably be near the cost of a decent wet set-up to start with.

So say 4* on a 150 would be pretty safe? 4* from stock of course...

Im open to any and all advise including wet vs dry (if we can keep it from walking off a cliff LOL)

Chris@NitroDaves

My personal preference and Professional opinion would be go wet all the way!! You'll have a lot more adjustability going with a wet system that you can grow with. We have had customers spray 100-150hp on a stock tune and if the car is untouched and on a completely stock tune then you might be ok but if it was my vehicle I'd at least at the minimum pull 2-3* off the factory tune.

LS1Silverado05

iTrader: (41)

I appreciate the input!

LS1Silverado05

iTrader: (41)

What kind of times should a stock M6 be running on a 100 shot? 150?... (I understand driver will drastically effect this)

SHDY 5.7

In my opinion,it can vary. Depending on how soon u get into the spray,etc. As said by many,nitrous makes its biggest gain in the first 1/8th,not so much on the big end.

Id say expect Atleast a half second to a second quicker then u are now.

I know with my lt1 formula,which was an a4,with out n2o it ran 13.3,on a 150hp shot,it went 11.60,175hp it went 11.40 but the stock 10blt hated it.

GoBabyvroommm

iTrader: (11)

If you plan to stay on the stock tune. Run either the br or tr. If u want to use a dry shot no more then 100 shot. If its a wet kit no more then 150 shot. Now if you are on the 150 wet with 26 to 25 timing make sure you are on race fuel and don't spray it back to back let it cool down. I run 18 degrees of timing in my nitrous tune and 110 race fuel.

Badass 2003 Z06

iTrader: (2)

300 shot

Timmy2Stage

iTrader: (56)

I put 225HP of spray (150 wet/75Dry) through a bone stock Ls1 for years on PUMP GAS.

It's all in the tune up. Run a NGK BR7EF plug gapped @ .025 and pull 2 degrees for every 50hp of spray on pump gas. You can get away with more timing if you're running good fuel.

Also, this is VERY important. Make sure your rear steam ports ARE NOT blocked off. Alot of guys end up butting up the top compression ring on #7 and even #5 if they're blocked off.

With that being said, 150hp on a LS1 will last a long time if a few things are done right.

GoBabyvroommm

iTrader: (11)

225 on pump gas. Wish I could see a pull using HP turner. I get knock sometimes on a 150 wet on the 110 using shell 93. I'm guessing u had a bigger fuel pump and injectors to be doing that. Why do a dry shot away? Sorry just wondering not doubting you just never seen or heard anyone do this in Chicago.

JoeBone

iTrader: (3)

I have been considering running a small dry, then a larger wet kit for my bigger shot as well. I will have hp tuners on before and during my test and tune, but I think I will get a wideband as well. How many bottles did you run through your car on the 225 shot?