So I have heard a few stories about rod bolts stretching and the holes elongating I have 34,000 miles on the odometer and am about to step up to a 3065 turbo and AEM...I am wondering how far I should push the car for track days. The car is setup for this turbo but I am just wondering how long the stock bottom end will hold running 28-30psi only on track days....I have an excellent tuner who will be handling business and he is confident the car will do fine. He is also going to teach me the ropes on the AEM so I can navigate through the software myself( I already have decent tuning knowledge) My daily driving tune will be unagressive...18-20psi. I refuse to get meth injection because I know my right foot will get heavy and the car will get beat on more than if I just stick to pump gas and low boost on the street. Martin, Eric, any info appreciated...thanks


-Tony

 

I've been running on the 3065 and DSMLink on my Eclipse at ~27psi w/ DIY meth, for almost 3 years now *in sig*. Stock bottom end (none of which is forged -unlike the Evo), with only headstuds/272's/and MLS gasket. With the proper tune the bottom end can hold upwards of 500whp.

for an idea i've been running my setup that has trapped numorous 127-129mph traps. You'll be fine . Keep an eye on the a/f and keep timing reasonable, generally timing is what kills motors given other things are within reason.

 

we hear customers ask us this alot but in all the builds we have done we have never once come across an EVO that has had the stock rod bolts stretch. Is it a bad idea? of course not. I dont think its necessary. By the time your stock rod bolts are stretching your stock rods and pistons are probally taking a beating too.


One thing Martin brought up to me today. Rod bolts really are directly related to RPM. Under compression the striain isnt on the rod bolt but on the piston and rod creating pressure on the crank and rod bearings. Its under the Exhuast stroke where the rod and piston pull against the rod bolt that you will have the strain on the rod bolt. If all you are keeping the cars RPM range within the factory limits (maybe a few hundred rpm higher) you really have nothing to worry about with rod bolts. Save your money for something more important.

Eric

 

Thanks for your observations. info like that is good to have access to - thanks AMS

 

Thanks guys. That makes me feel alot better. As stated before, it will be tuned to make power but we are not trying to break records so it will be tuned on the safe side. The rpm thing makes since and I will not be taking the car past 8200-8500 because of the stock valve train (except 272 HKS) AND bottom end of course.
My goal is a 130 trap and a high 10 second pass on this set up.

 

To me 8500rpm would be testing the stock hardwares' limits. I wouldn't suggest more 7900 on stock stuff maybe less.

 

My buddy Mark Streeter has an AMS 35r with stock internals and AEM with the same guy tuning his that will tune mine and he goes to 8500. I think as long as your cams are not too agressive you are ok to 8500. He has about 55-60000 miles on the motor and 35-40000 of that is with the 35r.

 

In that case why ask the question if Rod Bolts are needed. Your buddies car answered your question or u thinkin he got a freak beast of a motor or he does not track the car. Just wierd how your last statement of optimism and knowledge contradicts your initial post.

 

And here you answered your own question so "why ask a question like that" lol? See what I mean? Yes I thought he may be getting lucky and have suggested he back it off a tad but thanks for playing bud lol. Besides, I always thought the bottoms were good to 8500 it was just the valve spings, retainers and what not were not good to 8500 if you had anything more aggressive than hks 272 cams. I could be wrong on this, I just want the opinions of people I think are professionls i.e Martin and Eric. Don't need a bash session here just helpful input

 

Stock is proven to rev to 8.8k with 280 cam!!TTP,Trinababe,EVODave spin the stock motor(Head stud and cam only) with no probelm.

 

Thats what I was thinking...very mixed opnions on this subject from what I gather.