Running a stock LS3 with Paxton 1500 as the only real mod. Other than the safety factor with tuning is the addition of meth injection only worth it. With a re-tune will I feel any real world performance gains as well? Looking for a little more power maybe in the 600-625 range.Thanks!!!

 

Meth will allow an increase in timing which will yield more power. You could always turn up the boost to make more if desired.

 

Meth will raise the octane level and lower the IATs. You will be able to add more boost and advanced timing. I think the general swag/rule of thumb is 20hp per 1 psi of additional boost. Of course there are a multitude of factors that can alter that number. I would talk to a good tuner and see what they are comfortable with. There are a lot of really smart guys on here who can elaborate more.

 

Agree about a lot of smart guys here. Why I asked

 

Do a little fuel upgrade with that alky kit and you can get a nice bump in power.

 

I just ordered a ti trim vortech kit from A&A on Monday, so I dont have any experience with running boost on a high compression LS engine thus far.

However, I owned a Toyota Supra for a number of years. With the 2JZ-GTE motor, I could run 16-18 psi on 93 pump safely all day long with a 67mm single turbo. With meth, you could take it to 22-24. The 2J motor is a 8.5:1 compression ratio, forged pistons, iron block, and a metal head gasket from the factory, so it is pretty bullet proof unless you do something really stupid to it. ARP stud it and you can beat on that motor all day, every day. Meth was a great addition with a lot of seat of the pants payback for $500-600 bucks

I am not sure how many more psi you can safely add to an LS motor with meth. I have a lot to learn with the ins and outs on LS motors with adding F/I to them. Looking forward to the journey. I am already budgeting a new forged 9.5 or 10:1 402 short block from TSP. Figured I will have the funds available in the event my 60k LS2 with h/c lets go after adding 5-6 pounds of boost to it. I hope if I stay between 575-600 it will stay together for awhile.

Best wishes on your build.

Chris

 

Chris-thanks again. You are gonna love boost on this car. Enjoy

 

Adding meth is certainly worth it from a power perspective. It does give you one more system to maintain and worry about, but that's a fair tradeoff for a lot of us here.

Since I'm assuming you have a restrictor plate equipped ECS kit, you can gain a lot of power adding meth and losing the plate. That's on the more aggressive side of things (14-15 psi probably), but is a tried and true formula ECS has been doing for a long time. With proper tuning, it can be plenty reliable too. Just keep in mind that more boost and power = more risk.

 

You will feel an increase in power, you will also make that power more consistently in the warmer months.

Since you said you are stock otherwise, I wouldn't go too much higher in HP then what you posted you're looking for due to the stock cats.

So in your case we would open the restrictor a little and retune to your desired HP level of 625. The next progression would be adding a set of ARH's in there and we can turn it up to right around the 700 mark. Above that we go with our stg 1 fuel system to get in between 700-750, and above 750 it's time to add a cam.

The numbers sound a bit crazy for a stock engine, but we literally have 100's of them on the road with almost no failures. I have found a greater failure rate from a 550/600 rwhp car without meth, then a 700+ rwhp car with meth. It's all about the octane for the LS engine.

.

 

Doug,

I thought the rods were the wink link, and that is why it is advised to stay below 650 on stock block. Is this not true in your experience? Are you saying most of the premature deaths are due to detonation issues.

 

Doug-Thank you! I had e-mail and Chris responded right away last week. I'll be setting something up by this time next week for the install. Good timing as well. I'm am starting to experience a funny noise. Cya soon!!

 

You've about talked me into a meth kit from you guys.

 

Meth is one of the best/smartest mods you can do to a boosted LS motor. My ecs stage one fuel system and Alky kit from them should be here tomorrow. Time for more power! 700rwhp wasn't enough😄

 

LOL-you junkie!

 

I was at 595 with an Si and a 3.6". Added meth, and Andy at A&A re-tuned and dyno'd me at 666.

Next up is Flex Fuel conversion and a 3.4". Will probably pull off the meth, since it has to be rebuilt every couple of years, and that's a PITA.

 

Is that true the Meth needs rebuild every few years news to me?

 

Yes, the pump seals fail, so one should rebuild it before that occurs. That means the fender comes off (if you have the standard Alky Control unit), and your car is laid up until you can ship the pump, get it rebuilt, and then sent back to you. That's 2 weeks easy.

Not as much of a problem for people who live in cold climates and have their cars in storage in winter, but a major PITA for those who need/want their cars year round.

E-mail Julio at Alky Control, or Josh at A&A, and they'll tell you, 1-2 years, then rebuild.

 

Could just get a second pump to avoid the down time. Swap pumps then send out the old pump for a rebuild.

 

Quick question, what's the general census on running meth.. Are people running 100% Meth like VP M5 or doing like a 50/50 mix?

 

100% seems to be most common around here