Just wanted to get an idea of what to expect as far as numbers when my new SLP 402 goes in with all the parts off my 346.

Please tell me a bit about your setup, a4/m6, what kind of dyno numbers you put down, and if you have been to the track what kind of MPH are you trapping ??

Just a few questions that I hope the answers give me something to look forward to next month.

Any negative comments please PM me, and let me know about any problems that way. Lets try to respect our sponsors on this one. Negative comments must remain in PM.

Thanks for any help in advance.

 

https://ls1tech.com/forums/showthrea...ht=402+205+afr

https://ls1tech.com/forums/showthrea...ht=402+205+afr

https://ls1tech.com/forums/showthrea...ht=402+205+afr

Looks like its safe to say your going to be around 500ish rwhp +10/-10

 

I would be willing to bet 520-550hp/500tq, good luck with your research.

 

We had one in a customer of ours cars, and let me tell you that thing took some major abuse.

02 z28, out of the box L92's, TSP Giant cam, hooker 1 3/4 headers with true duals, Vig 3600 converter, 9 in. Made a best motor pull of 486/468 unlocked. On the nitrous tune it still made 456/440, and on a 125 shot made 594/636.

This was the kids first built engine (17 at the time). I couldn't tell you how many times it came in for routine stuff, and was 2-3 quarts low on oil, or the oil hadn't been changed in 6k miles. This thing still lasted 46k miles in 1.5 years, and at the very end of its life had over 200lbs of nitrous pumped through it within 1-2 months. Also it went from the A4 to a TH350 towards the end. Which eliminated all easy cruising. This kid drove 75 mph no matter what. With 3.70s and 245/45/17's thats averaging about 3600 rpms constantly. This is just the tip of the iceberg. I could write a novel on this thing, but it was beat to ****, and lived to tell about it. Finally the top of a piston blew off, and damaged a cylinder, and bent rod worse than I have ever seen one bent before. When inspecting the rest of the engine upon teardown, we found stress cracks around all the piston pins. When we pulled the pins out and removed the pistons they were actually bent. This should tell you how bad this thing was abused.

 

Well Broke TA I really appreciate your comments. I won't be spraying NITROUS, and I don't plan on beating the living **** out of this motor. I can't spend anymore money on the car. This is the final straw so she's gotta last. Sounds like she'll be a 100,000 mile engine without issue. I am meticulous about maintainence. Oil changes are cheap insurance in my book. Too bad the 17 yr old didn't adhere to that.

30th TA thanks for the links. I am pretty familiar with camaro kids success. I am hoping to do a little better though. Hopefully I am not being to optimisitic

Really would be happy with 520/490 If its a bit lower on the hp side no problem, but I really expect the torque to be around 490.

Thanks again fellas.

 

Through the factory trans/rear it will probably be higher than 490/445...IMO.

 

I have a DTE stg III rear with 3.42's. Carbon fiber drive shaft, exedy twin plate. Not sure on the flywheel, I think its the steel flywheel. Bobby at LGM said stay away from the aluminum for some reason. Past issues ?? Not sure. I have a dyno friendly driveline for sure.

 

Funny I was quoting your sig. instead of the previous post...oooops. I meant to say 520/490...not 490/445 :LOL:

 

I knew what you meant bro.

 

Why dont you have LG get you a motor from who ever does theres?I would think the chances of it being reliable would be a lot better.

 

They do there own motors for the most part in house. As we all know its a lot more expensive to do ONE motor then it is for a vendor to do 1000's. Big discount in bulk brother. For the record I tried, Louis just said he couldn't do ONE as cheap as SLP. I may get a better shortblock, but at what cost. SLP is the way to go. They wouldn't have sent me there if it wasn't.

 

I had HKE build my short block...I should be firing it up in a week or so, will let you know how it comes out.

 

If you want the most out of a 402 Id run the TFS 225s or 235s. From what Ive seen they have been producing the best numbers consistanly. You should be in the 540+ range.

 

TFS could be an option in the future, or AFR 225's touched by Tony Mamo. Due to cost being a major factor on this project I have to reuse everything that I can.

 

yeah, the top-end is EVERYTHING to a motor's performance. Bottom-end, well..the question for the bottom-end is not, "how much?" but rather.."can it take what my top-end is about to bring?" So therefore, I would say stick Tony Mamofied AFR 205cc on for stupid awesome throttle response and a great powerband, or put on Mamofied AFR 225cc's for the beastly top-end powerband. If you can't go with that, then go w/ some worked TFS 215cc heads for the win. Makes sure you get that ported 92mm throttle body and Intake mani for the extra 5-10whp.

Can't go cheap. It's the only guarantee you have to make the most you could. That's all I can tell you.

On the contrary, just be satisfied if you hit 475/475 until you get the money to do it right, then call it quits after your supreme top-end cranks out 550/520.

 

Well that's just not an option at this time. I have to reuse my afr 205's milled to 59cc, g5x3 vII cam, (new 92 ported to 95 FAST with 95mm tb) <ported 90 combo is sold>, ewp, ud pully, and if the 30# svo's can supply the fuel needed I'll reuse them as well. The setup should get me 500 to the wheel guaranteed. The 205 heads will give monstrous throttle response. The torque number is what I am most concerned with. 490 to the wheels or better.

In the future I could consider selling the AFR 205's for a bigger set if and when the power gets boring. LOL.

 

475/475, are you nuts ??? My lil 346 made 490 to the wheels, and you are telling me adding 56 ci's that I will lose 15 rwhp and only gain 30 rwtq ??? Holy **** bro, lets see what everyone else says about that one. Thanks for the comments though.

Tell you what, you pay the cost of the better heads and I'll give you the money I get from my 205's.

 

Anyone still running stock fuel pump on their 402 ?? Any worries about running out of fuel? What injectors, will my 30# svo's be enough? I don't want to be at 100% duty cycle.

 

I would trust the injectors before the stock fuel pump.

 

are you just upgrading or did something happen to your motor?