Whisper

iTrader: (12)

So I am loosely considering nitrous in the future and am wanting the absolute easiest error proof/safe kit for a 100-150 shot out there. So I'm considering the plate systems. The car also has a BBK 80 mm throttlebody. I don't have access to the old throttlebody nor do I want to have to purchase a stock one. So is my best option to go with the 78mm plate kits OR to go with a 80mm plate kit? It seems the Dodge Mopar kits are 80 mm. Are the kits identical with the exception of the diameter of the plates with these kits? If so, it seems a better solution might be to simply get a kit with the proper plate size. Thanks for any info!

Whisper

iTrader: (12)

I should also note the car makes 441 rwhp and upon reading through the nitrous stickies, its recommended to not try and go past 500rwhp on a stock bottom end. The car has ARP headbolts but no other bottom end upgrades. Does this logic still hold true and do I need to be considering a smaller shot and/or better bottom end internals before I consider nitrous?

AJatNitrousOutlet

A 78MM plate would work fine, however you'd have a 1MM step down where the plate meets the throttle body. It's hard to say exactly your bottom end will hold. I've seen cars blow it and 450HP, and I've also seen cars with 1000HP on a stock bottom end. There's really just too much variable to say-

NitrousExpress

iTrader: (4)

What is the motor setup? You haven't mentioned anything about what it is, I'm assuming LS1 still?

I would stay around 100-150hp with the extra power you are already making if you are worried about hurting anything. (If it is an LS1.)


-Garrett

AJatNitrousOutlet

I would hope he would have an LSx beings we are on LS1tech..............


We have a customer with one of our systems who has the stock bottom end record on a 5.3. It was on a 36 jet when it made that record pass, they have now moved up to a 38 jet. It all comes down the one thing, a spot on tune.

A 150-200 hit on stock bottom end will hold a long time with no freshen up's. If you have a great tuner or you can tune and data log yourself and make adjustments due to weather/ track conditions it will live for a long long time.

AJatNitrousOutlet

Get familiar with reading plugs. This will be a key component in wanting to get more agressive on your tune up and how much you are wanting to throw at your engine. The plugs will tell you eveything you will need to know to keep creeping up on the jet size.

Here is a great introductory article on choosing the right spark plug for your application. Let us know if you have any more questions bud.

http://nitroustech.com/spark-plug-specs/

NitrousExpress

iTrader: (4)

I was talking about an LS1 not an "LSx". Me personally, I wouldn't spray as much on an LS1 as I would a 5.3, also wouldn't spray as much on an aluminum block as I would a cast block setup. I think you misunderstood me.

-Garrett

AJatNitrousOutlet

The small LSx signifies a 1,2,3,6 ect. ect. as I do not know what LS motor he is running. A LSX, big X would signify a 6 bolt block.

And that record holder is on a L33 block, which is the aluminium 5.3. 799 heads as well.

Whisper

iTrader: (12)

Technically an LS6 then. Stock displacement.

TSP Magic Stick 4 Cam 239/242 .649"/609" 111 LSA
GM LS6 Race Heads- 61.9cc, 250cc Intake, 85cc exhaust
Yella Terra Rockers 1.7:1 Ratio
PRC Dual Valve Springs w/Titanium Retainers. Previous owner says the springs only have 300 miles on them.
Thunder Racing Hardened Pushrods 7.4"
GM CTS-V Race lifters (GM 88958689)
ARP Rod and Main bolts
Powerband Underdrive Pulley
BBK 80mm Throttle Body
36# injectors
Ported MAF
Jet Hot 1 7/8" Longtube Headers
4.10s

AJatNitrousOutlet

Not the most ideal cam, espically with that LSA. But it will still be no turd. Run the 52 jets to see how the car responds and then start creeping up from there. With a good tune I would not be scared of the 62 jet one bit. And then if you start reading the plugs, I would have no problem creeping up to a 78 jet.

There is a good thread in this section of a customer with our Stinger plate making small changes and getting his tune up really dialed in. He kept posting up pictures, made adjuastments and now his car runs like a bat out of hell.

Whisper

iTrader: (12)

I plan on going with a MUCH less radical cam- something in the 222/230 114 LSA range. However, does the whole 'Dont trust the stock bottom end past 500 rwhp'? adage still hold true when spraying?

AJatNitrousOutlet

No and it never really did. You will get a whole bunch of different suggestions and opinions. But I can tell you from personal experience, that 500rwhp is nothing for a stock bottom end LS engine. I would not get worried until I hit 550rwhp+. Then I would really want to make sure the tune is 100% whenever you are spraying.

NitrousExpress

iTrader: (4)

Lol, it all depends if you are worried about hurting anything or not. Its a chance game on big spray on factory SBE stuff. And a very important part of making a motor live is the tuneup.

Thanks,
Garrett

Whisper

iTrader: (12)

Thanks for the info guys. I should clarify I'm talking about a 75-100 shot on a car that (currently) makes about 440 rwhp but will probably be 10-20 less with the less aggressive cam I'm thinking about.

NitrousExpress

iTrader: (4)

I think that would be perfectly fine. We have hit 200 on a factory LS1 and another guy in the shop has been hitting 250 with a single nozzle on his cam only 5.3 for a couple years now.

Thanks,
Garrett

dankhts

You say you have ARP rod and main bolts, just re did my shortblock with those as am told they really help the bottom end stay together with the extra power....was I being lied to?

Guess I'll find out real soon...

Whisper

iTrader: (12)

Just to confirm the 80 MM TB I have should have the same 3 bolt pattern that a 78 mm plate kit would use? Getting very close to purchase.

AJatNitrousOutlet

It should have the same 3 bolt pattern as the 78mm...